IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

External Parties

Table of Contents

Page

Seller

1. Certificate Payment Report

IndyMac Bank, F.S.B.

2. Collection Account Report

3. Credit Enhancement Report

Servicer(s)

4. Collateral Report

IndyMac Bank, F.S.B.

5. Delinquency Report

6. REO Report

Underwriter(s)

7. Foreclosure Report

Credit Suisse Securities LLC

8. Prepayment Report

9. Prepayment Detail Report

10. Realized Loss Report

11. Realized Loss Detail Report

12. Triggers and Adj. Cert. Report

13. Other Related Information

Total Number of Pages

Dates

Contacts

Cut-Off Date:

May 01, 2007

Jennifer Hermansader

Close Date:

May 29, 2007

Administrator

First Distribution Date:

June 25, 2007

(714) 247-6258

Jennifer.Vandyne@db.com

Address:

Distribution Date:

December 26, 2007

1761 East St. Andrew Place, Santa Ana, CA 92705

Record Date:

November 30, 2007

Factor Information:

(800) 735-7777

Main Phone Number:

(714) 247-6000

Determination Date:

December 18, 2007

https://tss.sfs.db.com/investpublic

Page 1 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Certificate Payment Report
Current Period Distribution - REMIC II
			Prior						Current
			Prior

	Class	Original	Principal			Total	Realized	Deferred	Principal

Class	Type	Face Value	Balance	Interest	Principal	Distribution	Loss	Interest	Balance
			(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
1-A-1	SR	99,900,000.00	98,077,080.39	490,385.40	53,263.10	543,648.50	0.00	0.00	98,023,817.29
1-A-1	SR	99,900,000.00	98,077,080.39	490,385.40	53,263.10	543,648.50	0.00	0.00	98,023,817.29
1-A-2	SR	10,092,900.00	9,908,730.37	49,543.65	5,381.17	54,924.82	0.00	0.00	9,903,349.20
2-A-1	SR	145,470,000.00	131,951,647.72	714,738.09	45,150.26	759,888.35	0.00	0.00	131,906,497.46
2-A-2	SR	4,000,000.00	3,628,284.78	19,653.21	1,241.50	20,894.71	0.00	0.00	3,627,043.28
PO	SR	677,070.66	671,039.62	0.00	290.88	290.88	0.00	0.00	670,748.74
A-X	SR/NTL	0.00	0.00	82,769.65	0.00	82,769.65	0.00	0.00	0.00
A-R	SR/RES	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	SUB	8,415,000.00	8,259,566.14	43,252.24	2,921.25	46,173.49	0.00	0.00	8,256,644.89
B-2	SUB	3,786,000.00	3,716,068.62	19,459.65	1,314.30	20,773.95	0.00	0.00	3,714,754.32
B-3	SUB	2,524,000.00	2,477,379.07	12,973.10	876.20	13,849.30	0.00	0.00	2,476,502.87
B-4	NOF/SUB	2,384,000.00	2,339,965.03	12,253.52	827.60	13,081.12	0.00	0.00	2,339,137.43
B-5	NOF/SUB	1,823,000.00	1,789,327.28	9,370.03	632.85	10,002.88	0.00	0.00	1,788,694.43
B-6	NOF/SUB	1,402,909.73	1,376,996.50	7,210.81	487.02	7,697.83	0.00	0.00	1,376,509.48
L	NOF	0.00	0.00	2,507.83	0.00	2,507.83	0.00	0.00	0.00
P	NOF	100.00	100.00	2,618.92	0.00	2,618.92	0.00	0.00	100.00


Total		280,475,080.39	264,196,185.52	1,466,736.10	112,386.13	1,579,122.23	0.00	0.00	264,083,799.39
Total




Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face Value
					Orig. Principal	Prior				Current
					Orig. Principal	Prior				Current
	Period	Period			(with Notional)	Principal			Total	Principal
Class	Starting	Ending	Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
			Method
					(1)	(1)	(2)	(3)	(4)=(2)+(3)	(5)

1-A-1	11/01/07	11/30/07	F-30/360	456671AA4	99,900,000.00	981.752556	4.908763	0.533164	5.441927	981.219392
1-A-1	11/01/07	11/30/07	F-30/360	456671AA4	99,900,000.00	981.752556	4.908763	0.533164	5.441927	981.219392
1-A-2	11/01/07	11/30/07	F-30/360	456671AB2	10,092,900.00	981.752556	4.908763	0.533164	5.441927	981.219392
2-A-1	11/01/07	11/30/07	F-30/360	456671AC0	145,470,000.00	907.071202	4.913302	0.310375	5.223677	906.760827
2-A-2	11/01/07	11/30/07	F-30/360	456671AD8	4,000,000.00	907.071195	4.913303	0.310375	5.223678	906.760820
PO		456671AE6	677,070.66	991.092451	0.000000	0.429615	0.429615	990.662836
A-X	11/01/07	11/30/07	F-30/360	456671AF3	16,736,191.00	913.024167	4.945549	0.000000	4.945549	912.712905
A-R	11/01/07	11/30/07	F-30/360	456671AG1	100.00	0.000000	0.000000	0.000000	0.000000	0.000000
B-1	11/01/07	11/30/07	A-30/360	456671AH9	8,415,000.00	981.528953	5.139898	0.347148	5.487046	981.181805
B-2	11/01/07	11/30/07	A-30/360	456671AJ5	3,786,000.00	981.528954	5.139897	0.347147	5.487044	981.181807
B-3	11/01/07	11/30/07	A-30/360	456671AK2	2,524,000.00	981.528950	5.139897	0.347147	5.487044	981.181803
B-4	11/01/07	11/30/07	A-30/360	456671AL0	2,384,000.00	981.528956	5.139899	0.347148	5.487047	981.181808
B-5	11/01/07	11/30/07	A-30/360	456671AM8	1,823,000.00	981.528952	5.139896	0.347148	5.487043	981.181805
B-6	11/01/07	11/30/07	A-30/360	456671AN6	1,402,909.73	981.528940	5.139896	0.347150	5.487046	981.181790
L		456671AQ9	0.00	0.000000	0.000000	0.000000	0.000000	0.000000
P		456671AP1	100.00	1,000.000000	26,189.200000	0.000000	26,189.200000	1,000.000000




Page 2 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


Distribution to Date - REMIC II
									Current


	Original		Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal

Class	Face Value	Interest	Principal	Principal	Principal	Distribution	Loss	Interest	Balance
(1)	(2)	(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
1-A-1	99,900,000.00	3,460,986.82	1,579,690.45	296,492.26	1,876,182.71	5,337,169.53	0.00	0.00	98,023,817.29
1-A-2	10,092,900.00	349,663.60	159,596.17	29,954.62	189,550.80	539,214.40	0.00	0.00	9,903,349.20
2-A-1	145,470,000.00	5,276,806.78	9,282,271.76	4,281,230.78	13,563,502.54	18,840,309.32	0.00	0.00	131,906,497.46
2-A-2	4,000,000.00	145,096.77	255,235.37	117,721.34	372,956.72	518,053.49	0.00	0.00	3,627,043.28
PO	677,070.66	0.00	2,266.10	4,055.82	6,321.92	6,321.92	0.00	0.00	670,748.74
A-X	0.00	602,610.41	0.00	0.00	0.00	602,610.41	0.00	0.00	0.00
A-R	100.00	0.50	83.43	16.57	100.00	100.50	0.00	0.00	0.00
B-1	8,415,000.00	306,445.85	0.00	158,355.11	158,355.11	464,800.96	0.00	0.00	8,256,644.89
B-2	3,786,000.00	137,873.31	0.00	71,245.68	71,245.68	209,118.99	0.00	0.00	3,714,754.32
B-3	2,524,000.00	91,915.55	0.00	47,497.13	47,497.13	139,412.68	0.00	0.00	2,476,502.87
B-4	2,384,000.00	86,817.22	0.00	44,862.57	44,862.57	131,679.79	0.00	0.00	2,339,137.43
B-5	1,823,000.00	66,387.49	0.00	34,305.57	34,305.57	100,693.06	0.00	0.00	1,788,694.43
B-6	1,402,909.73	51,089.20	0.00	26,400.25	26,400.25	77,489.45	0.00	0.00	1,376,509.48
L	0.00	12,195.72	0.00	0.00	0.00	12,195.72	0.00	0.00	0.00
P	100.00	38,798.86	0.00	0.00	0.00	38,798.86	0.00	0.00	100.00


Total	280,475,080.39	10,626,688.08	11,279,143.28	5,112,137.70	16,391,281.00	27,017,969.08	0.00	0.00	264,083,799.39


Interest Detail - REMIC II
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or	Current
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or

	Through	(with Notional)	Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid

Class	Rate	Balance	Interest	Interest SF	Interest	Adjustment	Interest	Interest	Interest
			(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
1-A-1	6.00000%	98,077,080.39	490,385.40	0.00	0.00	0.00	490,385.40	490,385.40	0.00
1-A-2	6.00000%	9,908,730.37	49,543.65	0.00	0.00	0.00	49,543.65	49,543.65	0.00
2-A-1	6.50000%	131,951,647.72	714,738.09	0.00	0.00	0.00	714,738.09	714,738.09	0.00
2-A-2	6.50000%	3,628,284.78	19,653.21	0.00	0.00	0.00	19,653.21	19,653.21	0.00
PO	0.00000%	671,039.62	0.00	0.00	0.00	0.00	0.00	0.00	0.00
A-X	6.50000%	15,280,546.84	82,769.63	0.00	0.00	0.00	82,769.63	82,769.65	0.00
A-R	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	6.28395%	8,259,566.14	43,252.24	0.00	0.00	0.00	43,252.24	43,252.24	0.00
B-2	6.28395%	3,716,068.62	19,459.65	0.00	0.00	0.00	19,459.65	19,459.65	0.00
B-3	6.28395%	2,477,379.07	12,973.10	0.00	0.00	0.00	12,973.10	12,973.10	0.00
B-4	6.28395%	2,339,965.03	12,253.52	0.00	0.00	0.00	12,253.52	12,253.52	0.00
B-5	6.28395%	1,789,327.28	9,370.03	0.00	0.00	0.00	9,370.03	9,370.03	0.00
B-6	6.28395%	1,376,996.50	7,210.81	0.00	0.00	0.00	7,210.81	7,210.81	0.00
L	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	2,507.83	0.00
P	31,427.04000%	100.00	0.00	0.00	0.00	0.00	0.00	2,618.92	0.00


Total		279,476,732.36	1,461,609.33	0.00	0.00	0.00	1,461,609.33	1,466,736.10	0.00



Page 3 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Collection Account Report
SUMMARY

	Group 2	Group 1	Total
Principal Collections	49,688.26	62,697.87	112,386.13
Principal Withdrawals	0.00	0.00	0.00
Principal Other Accounts	0.00	0.00	0.00
TOTAL NET PRINCIPAL	49,688.26	62,697.87	112,386.13
Interest Collections	876,094.27	618,952.26	1,495,046.53
Interest Withdrawals	-0.00	-0.00	-0.00
Interest Other Accounts	2,073.50	434.33	5,126.75
Interest Fees	-17,733.40	-15,703.78	-33,437.18
TOTAL NET INTEREST	860,434.38	605,756.31	1,466,736.10
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION	910,122.64	668,454.18	1,579,122.23




PRINCIPAL - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Principal Received	42,533.86	51,313.56	93,847.42
Curtailments	7,154.40	11,384.31	18,538.71
Prepayments In Full	0.00	0.00	0.00
Repurchased/Substitutions	0.00	0.00	0.00
Liquidations	0.00	0.00	0.00
Insurance Principal	0.00	0.00	0.00
Other Additional Principal	0.00	0.00	0.00
Delinquent Principal	-16,081.16	-13,698.59	-29,779.75
Realized Losses	-0.00	-0.00	-0.00
Advanced Principal	16,081.16	13,698.59	29,779.75
TOTAL PRINCIPAL COLLECTED	49,688.26	62,697.87	112,386.13




PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK




PRINCIPAL - OTHER ACCOUNTS

	Group 2	Group 1	Total
PRINCIPAL OTHER ACCOUNTS	0.00	0.00	0.00






Page 4 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


INTEREST - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Interest	886,747.23	625,258.57	1,512,005.80
Repurchased/Substitution Interest	0.00	0.00	0.00
Liquidation Interest	0.00	0.00	0.00
Insurance Interest	0.00	0.00	0.00
Other Additional Interest	0.00	0.00	0.00
Prepayment Interest Shortfalls	-0.00	-0.00	-0.00
Delinquent Interest	-378,459.59	-192,667.58	-571,127.17
Compensating Interest	0.00	0.00	0.00
Civil Relief Act Shortfalls	-0.00	-0.00	-0.00
Interest Advanced	367,806.64	186,361.27	554,167.91
Interest Realized Loss	0.00	0.00	0.00
TOTAL INTEREST COLLECTED	876,094.27	618,952.26	1,495,046.53




INTEREST - WITHDRAWALS

	Group 2	Group 1	Total
Interest Withdrawals	0.00	0.00	0.00




INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
	Group 2	Group 1	Total
Prepayment Charges Collected. *
Prepayment Charges Waived. *
Prepayment Charges paid by the servicer.	999.60	1,619.32	2,618.92
Late Payment Fee Collected *
Late Payment Fee Waived	208.82	117.20	326.02
Late Payment Fee paid by the Servicer	2,073.50	434.33	2,507.83
TOTAL INTEREST OTHER ACCOUNTS	2,073.50	434.33	5,126.75




* Information not available with Trustee








Page 5 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


INTEREST FEES
INTEREST FEES
	Group 2	Group 1	Total
Current Servicing Fees	15,223.29	14,526.48	29,749.76
Trustee Fees	1,224.72	976.92	2,201.63
PMI	1,285.40	200.38	1,485.78
TOTAL INTEREST FEES	17,733.40	15,703.78	33,437.18



Page 6 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

Credit Enhancement Report

ACCOUNTS

SPACE INTENTIONALLY LEFT BLANK

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Collateral Report


COLLATERAL



		Group 2	Group 1	Total



Loan Count:
Loan Count:


Original	278	210	488
Prior	255	207	462
Prefunding	0	0	0
Scheduled Paid Offs	-0	-0	-0
Full Voluntary Prepayments	-0	-0	-0
Repurchases	-0	-0	-0
Liquidations	-0	-0	-0
Current	255	207	462
Principal Balance:


Original	161,213,526.99	119,261,452.40	280,474,979.39
Prior	146,965,815.21	117,230,270.32	264,196,085.53
Prefunding	0.00	0.00	0.00
Scheduled Principal	-42,533.86	-51,313.56	-93,847.42
Partial Prepayments	-7,154.40	-11,384.31	-18,538.71
Full Voluntary Prepayments	-0.00	-0.00	-0.00
Repurchases	-0.00	-0.00	-0.00
Liquidations	-0.00	-0.00	-0.00
Current	146,916,126.95	117,167,572.45	264,083,699.40





PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 8 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


CHARACTERISTICS
CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Coupon Original	7.25073%	6.40228%	6.88996%
Weighted Average Coupon Prior	7.23428%	6.40031%	6.86797%
Weighted Average Coupon Current	7.24044%	6.40031%	6.86765%
Weighted Average Months to Maturity Original	356	356	356
Weighted Average Months to Maturity Prior	351	351	351
Weighted Average Months to Maturity Current	350	350	350
Weighted Avg Remaining Amortization Term Original	359	357	359
Weighted Avg Remaining Amortization Term Prior	354	352	353
Weighted Avg Remaining Amortization Term Current	353	351	352
Weighted Average Seasoning Original	3.77	3.63	3.71
Weighted Average Seasoning Prior	8.76	8.62	8.69
Weighted Average Seasoning Current	9.76	9.62	9.69

Page 9 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


ARM CHARACTERISTICS
ARM CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Margin Original	0.00000%	0.00000%	0.00000%
Weighted Average Margin Prior	0.00000%	0.00000%	0.00000%
Weighted Average Margin Current	0.00000%	0.00000%	0.00000%
Weighted Average Max Rate Original	0.00000%	0.00000%	0.00000%
Weighted Average Max Rate Prior	0.00000%	0.00000%	0.00000%
Weighted Average Max Rate Current	0.00000%	0.00000%	0.00000%
Weighted Average Min Rate Original	0.00000%	0.00000%	0.00000%
Weighted Average Min Rate Prior	0.00000%	0.00000%	0.00000%
Weighted Average Min Rate Current	0.00000%	0.00000%	0.00000%
Weighted Average Cap Up Original	0.00000%	0.00000%	0.00000%
Weighted Average Cap Up Prior	0.00000%	0.00000%	0.00000%
Weighted Average Cap Up Current	0.00000%	0.00000%	0.00000%
Weighted Average Cap Down Original	0.00000%	0.00000%	0.00000%
Weighted Average Cap Down Prior	0.00000%	0.00000%	0.00000%
Weighted Average Cap Down Current	0.00000%	0.00000%	0.00000%





Page 10 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

	Group 2	Group 1	Total




Current Servicing Fees	15,223.29	14,526.48	29,749.76
Delinquent Servicing Fees	10,652.95	6,306.31	16,959.26
TOTAL SERVICING FEES	25,876.24	20,832.79	46,709.03


Total Servicing Fees	25,876.24	20,832.79	46,709.03
Compensating Interest	-0.00	-0.00	-0.00
Delinquent Servicing Fees	-10,652.95	-6,306.31	-16,959.26
COLLECTED SERVICING FEES	15,223.29	14,526.48	29,749.77


Total Advanced Interest	367,806.64	186,361.27	554,167.91
Total Advanced Principal	16,081.16	13,698.59	29,779.75
Aggregate Advances with respect to this Distribution	383,887.79	200,059.86	583,947.65


Any additional servicing compensation received by the
Servicer attributable to penalties, fees, Excess Proceeds
or other similar charges or fees and items. *


The aggregate amount of Advances reimbursed
during the related Due Period. *
The general source of funds for such reimbursements. *
The aggregate amount of Advances outstanding as
of the close of business on the Distribution Date. *


The aggregate amount of Servicing Advances
reimbursed during the related Due Period. *
The general source of funds for such reimbursements. *
The aggregate amount of Servicing Advances outstanding
as of the close of business on the Distribution Date. *



* Information not available with Trustee




ADDITIONAL COLLATERAL INFORMATION
ADDITIONAL COLLATERAL INFORMATION
	Group 2	Group 1	Total
Prepayment Interest Shortfall (PPIS)	0.00	0.00	0.00
Compensating Interest	0.00	0.00	0.00
Net Prepayment Interest Shortfall (PPIS)	0.00	0.00	0.00

Weighted Average Net Mortgage Rate	7.008657%	6.175011%	6.638748%

The number and aggregate balance of any
Delayed Delivery Mortgage Loans not delivered
within the time periods specified in the
definition of Delayed Delivery Mortgage Loans. *

* Information not available with Trustee




Page 11 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Delinquency Report

TOTAL
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		7,646,721.99	2,193,697.54	5,215,441.55	15,055,861.08
	% Balance		2.90%	0.83%	1.97%	5.70%
	# Loans		13	4	10	27
	% # Loans		2.81%	0.87%	2.16%	5.84%
FORECLOSURE	Balance	0.00	0.00	0.00	5,297,507.24	5,297,507.24
	% Balance	0.00%	0.00%	0.00%	2.01%	2.01%
	# Loans	0	0	0	8	8
	% # Loans	0.00%	0.00%	0.00%	1.73%	1.73%
BANKRUPTCY	Balance	0.00	559,976.52	0.00	0.00	559,976.52
	% Balance	0.00%	0.21%	0.00%	0.00%	0.21%
	# Loans	0	1	0	0	1
	% # Loans	0.00%	0.22%	0.00%	0.00%	0.22%
REO	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL	Balance	0.00	8,206,698.51	2,193,697.54	10,512,948.79	20,913,344.84
	% Balance	0.00%	3.11%	0.83%	3.98%	7.92%
	# Loans	0	14	4	18	36
	% # Loans	0.00%	3.03%	0.87%	3.90%	7.79%

Page 12 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


GROUP 1
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		1,962,392.92	1,105,828.88	435,329.95	3,503,551.75
	% Balance		1.67%	0.94%	0.37%	2.99%
	# Loans		3	2	1	6
	% # Loans		1.45%	0.97%	0.48%	2.90%
FORECLOSURE	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
REO	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL	Balance	0.00	1,962,392.92	1,105,828.88	435,329.95	3,503,551.75
	% Balance	0.00%	1.67%	0.94%	0.37%	2.99%
	# Loans	0	3	2	1	6
	% # Loans	0.00%	1.45%	0.97%	0.48%	2.90%

Page 13 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


GROUP 2
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		5,684,329.07	1,087,868.66	4,780,111.60	11,552,309.33
	% Balance		3.87%	0.74%	3.25%	7.86%
	# Loans		10	2	9	21
	% # Loans		3.92%	0.78%	3.53%	8.24%
FORECLOSURE	Balance	0.00	0.00	0.00	5,297,507.24	5,297,507.24
	% Balance	0.00%	0.00%	0.00%	3.61%	3.61%
	# Loans	0	0	0	8	8
	% # Loans	0.00%	0.00%	0.00%	3.14%	3.14%
BANKRUPTCY	Balance	0.00	559,976.52	0.00	0.00	559,976.52
	% Balance	0.00%	0.38%	0.00%	0.00%	0.38%
	# Loans	0	1	0	0	1
	% # Loans	0.00%	0.39%	0.00%	0.00%	0.39%
REO	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL	Balance	0.00	6,244,305.59	1,087,868.66	10,077,618.84	17,409,793.09
	% Balance	0.00%	4.25%	0.74%	6.86%	11.85%
	# Loans	0	11	2	17	30
	% # Loans	0.00%	4.31%	0.78%	6.67%	11.76%

Page 14 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

REO Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

Page 15 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Foreclosure Report
Loan Number	Original	Stated		Current	State &		First
Loan Number	Original	Stated		Current	State &		First
&	Principal	Principal	Paid to	Note	LTV at	Original	Payment
Loan Group	Balance	Balance	Date	Rate	Origination	Term	Date
					Origination

Became Foreclosure Property this Period:
6078755 2	522,500.00	522,500.00	01-Jul-2007	8.500%	CO - 95.00%	360	01-Oct-2006
6116567 2	516,000.00	514,490.22	01-Jul-2007	8.375%	AZ - 80.00%	360	01-Feb-2007


TOTAL	1,038,500.00	1,036,990.22

Became Foreclosure Property in a Prior Period:
6101709 2	548,000.00	547,820.19	01-Jun-2007	7.875%	VA - 80.00%	360	01-Dec-2006
6101763 2	598,500.00	598,500.00	01-Apr-2007	8.250%	NY - 70.00%	360	01-Dec-2006
6106519 2	552,000.00	552,000.00	01-May-2007	6.750%	CA - 80.00%	360	01-Apr-2007
6114370 2	975,000.00	968,846.24	01-Jun-2007	8.250%	NY - 75.00%	360	01-Apr-2007
6114570 2	599,250.00	599,250.00	01-Jun-2007	6.875%	FL - 75.00%	360	01-Apr-2007
6128049 2	1,000,000.00	994,100.59	01-Apr-2007	8.250%	IL - 71.43%	360	01-Apr-2007


TOTAL	4,272,750.00	4,260,517.02


TOTAL	5,311,250.00	5,297,507.24
TOTAL


Page 16 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS
VOLUNTARY PREPAYMENTS

		Group 2	Group 1	Total


Current


Number of Paid in Full Loans	0	0	0
Number of Repurchased Loans	0	0	0
Total Number of Loans Prepaid in Full	0	0	0
Curtailments Amount	7,154.40	11,384.31	18,538.71
Paid in Full Balance	0.00	0.00	0.00
Repurchased Loans Balance	0.00	0.00	0.00
Total Prepayment Amount	7,154.40	11,384.31	18,538.71
Cumulative


Number of Paid in Full Loans	16	3	19
Number of Repurchased Loans	7	0	7
Total Number of Loans Prepaid in Full	23	3	26
Paid in Full Balance	9,495,904.13	1,433,986.94	10,929,891.07
Repurchased Loans Balance	4,454,327.62	0.00	4,454,327.62
Curtailments Amount	43,236.92	306,015.30	349,252.22
Total Prepayment Amount	13,993,468.67	1,740,002.24	15,733,470.91

Page 17 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Including Liquidated Balances



		Group 2	Group 1	Total





SMM	0.00%	0.01%	0.01%
3 Months Avg SMM	1.10%	0.01%	0.62%
12 Months Avg SMM	1.29%	0.21%	0.82%
Avg SMM Since Cut-off	1.29%	0.21%	0.82%



CPR	0.06%	0.12%	0.08%
3 Months Avg CPR	12.43%	0.13%	7.22%
12 Months Avg CPR	14.43%	2.49%	9.43%
Avg CPR Since Cut-off	14.43%	2.49%	9.43%



PSA	2.99%	6.06%	4.34%
3 Months Avg PSA Approximation	710.43%	7.53%	415.38%
12 Months Avg PSA Approximation	1,068.42%	188.13%	704.53%
Avg PSA Since Cut-off Approximation	1,068.42%	188.13%	704.53%


(*) SMM, CPR, PSA Figures Include Liquidated Balances

Page 18 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Including Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidated Balances)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(1-SMMn)*(1-SMMn+1)*...*(1-SMMm)]^(1/months in period n,m)

Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.20%*Avg WASn,m))

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.

Dates correspond to distribution dates.

Page 19 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Excluding Liquidated Balances



		Group 2	Group 1	Total





SMM	0.00%	0.01%	0.01%
3 Months Avg SMM	1.10%	0.01%	0.62%
12 Months Avg SMM	1.29%	0.21%	0.82%
Avg SMM Since Cut-off	1.29%	0.21%	0.82%



CPR	0.06%	0.12%	0.08%
3 Months Avg CPR	12.43%	0.13%	7.22%
12 Months Avg CPR	14.43%	2.49%	9.43%
Avg CPR Since Cut-off	14.43%	2.49%	9.43%



PSA	2.99%	6.06%	4.34%
3 Months Avg PSA Approximation	710.43%	7.53%	415.38%
12 Months Avg PSA Approximation	1,068.42%	188.13%	704.53%
Avg PSA Since Cut-off Approximation	1,068.42%	188.13%	704.53%

(*) SMM, CPR, PSA Figures Exclude Liquidated Balances
(*) SMM, CPR, PSA Figures Exclude Liquidated Balances

Page 20 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Excluding Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(1-SMMn)*(1-SMMn+1)*...*(1-SMMm)]^(1/months in period n,m)

Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.20%*Avg WASn,m))

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.

Dates correspond to distribution dates.

Page 21 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

Prepayment Detail Report

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution

Loan Number

Original

Current

State &

Type Prepayment

First

Loan

Principal

Prepayment

Note

LTV at

Payment

Loan Group

Status

Balance

Amount

Date

Rate

Origination

Original Term

Date

SPACE INTENTIONALLY LEFT BLANK

TOTAL

Page 22 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES


		Group 2	Group 1	Total


Current





	Subsequent Recoveries		0.00	0.00	0.00

	Number of Loans Liquidated		0	0	0
	Collateral Principal Realized Loss/(Gain) Amount		0.00	0.00	0.00
	Collateral Interest Realized Loss/(Gain) Amount		0.00	0.00	0.00
Net Liquidation Proceeds		0.00	0.00	0.00
Cumulative




	Number of Loans Liquidated		0	0	0

	Collateral Realized Loss/(Gain) Amount		0.00	0.00	0.00
	Net Liquidation Proceeds		0.00	0.00	0.00
Cumulative Subsequent Recoveries		0.00	0.00	0.00



	Special Hazard Loss Coverage Amt				3,660,360.68
	Fraud Loss Coverage Amt				5,608,499.58
	Bankrupt Loss Coverage Amt				247,127.26

	Class B-1 Writedown Amount				0.00
	Class B-2 Writedown Amount				0.00
	Class B-3 Writedown Amount				0.00
	Class B-4 Writedown Amount				0.00
	Class B-5 Writedown Amount				0.00
	Class B-6 Writedown Amount				0.00

Page 23 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution


DEFAULT SPEEDS
DEFAULT SPEEDS
	Group 2	Group 1	Total




MDR	0.00%	0.00%	0.00%
3 Months Avg MDR	0.00%	0.00%	0.00%
12 Months Avg MDR	0.00%	0.00%	0.00%
Avg MDR Since Cut-off	0.00%	0.00%	0.00%


CDR	0.00%	0.00%	0.00%
3 Months Avg CDR	0.00%	0.00%	0.00%
12 Months Avg CDR	0.00%	0.00%	0.00%
Avg CDR Since Cut-off	0.00%	0.00%	0.00%


SDA	0.00%	0.00%	0.00%
3 Months Avg SDA Approximation	0.00%	0.00%	0.00%
12 Months Avg SDA Approximation	0.00%	0.00%	0.00%
Avg SDA Since Cut-off Approximation	0.00%	0.00%	0.00%


Principal Only Loss Severity Approx for Current Period	0.00%	0.00%	0.00%
3 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
12 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
Avg Loss Severity Approximation Since Cut-Off	0.00%	0.00%	0.00%


Principal & Interest Loss Severity Approx for Current Period	0.00%	0.00%	0.00%
3 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
12 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
Avg Loss Severity Approximation Since Cut-Off	0.00%	0.00%	0.00%

Page 24 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY

Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)

Conditional Default Rate (CDR): 1-((1-MDR)^12)

SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)*0.02%,MAX(0.03%,MIN(30,WAS)*0.02%-0.0095%*(WAS-60)))

Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)*(1-MDRn+1)*...*(1-MDRm)]^(1/months in period n,m)

Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

Average SDA Approximation over period between the nth month and mth month:

AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)*0.02%,MAX(0.03%,MIN(30,Avg WASn,m)*0.02%-0.0095%*(Avg WASn,m-60)))

Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)

Principal Only Loss Severity Approximation for current period:

Sum(Principal Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Principal & Interest Loss Severity Approximation for current period:

Sum(Principal & Interest Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month:

Sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans for months in the period n,m

Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.

Dates correspond to distribution dates.

All Realized Losses in excess of Principal Balance are treated as Interest Realized Losses.

Page 25 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

Realized Loss Detail Report

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revision

Loss/(Gain)

TOTAL

Page 26 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1

Mortgage Pass-Through Certificates

December 26, 2007 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Group 2

Group 1

Total

Has Optional Termination Date Reached ?

Has Sr. Credit Supp. Depletion Date Occured ?

Has Special Haz. Cov. Term Date Occured ?

Has Fraud Loss Coverage Term Date Occured ?

Has BK Loss Cov. Term Date Occured ?

Does an Event of Default Exist?

Has Senior Stepdown Condition Satisfied?

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

ADDITIONAL INFORMATION

Group 2

Group 1

Total

Senior Percentage

92.284741%

92.604041%

92.426032%

Subordinate Percentage

7.715259%

7.395959%

7.573968%

Senior Prepayment Percentage

100.000000%

Subordinate Prepayment Percentage

0.000000%

Subordinate Pass Through Rate

6.283949%

Page 27 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
December 26, 2007 Distribution

Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
	Group 2	Group 1	Total
Current Scheduled Payments	929,281.09	676,572.13	1,605,853.21
Current Scheduled Payments 1 Month Prior	938,776.16	676,626.36	1,615,402.52
Current Scheduled Payments 2 Month Prior	958,439.49	676,663.89	1,635,103.38
Current Scheduled Payments 3 Month Prior	967,088.93	679,186.91	1,646,275.85
Current Scheduled Payments 4 Month Prior	994,059.37	684,617.58	1,678,676.94
Current Scheduled Payments 5 Month Prior	1,000,195.44	685,080.97	1,685,276.41
Current Scheduled Payments 6 Month Prior	1,018,656.60	686,282.35	1,704,938.96
Current Scheduled Payments 7 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 8 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 9 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 10 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 11 Month Prior	0.00	0.00	0.00



Delinquent 60+ Scheduled Payments	78,837.67	9,153.20	87,990.87
Delinq. 60+ Sched. Pmnts, 1 Month Prior	65,016.89	2,774.66	67,791.55
Delinq. 60+ Sched. Pmnts, 2 Month Prior	55,179.07	2,774.66	57,953.74
Delinq. 60+ Sched. Pmnts, 3 Month Prior	43,206.68	2,774.66	45,981.34
Delinq. 60+ Sched. Pmnts, 4 Month Prior	47,298.26	0.00	47,298.26
Delinq. 60+ Sched. Pmnts, 5 Month Prior	27,085.16	0.00	27,085.16
Delinq. 60+ Sched. Pmnts, 6 Month Prior	0.00	0.00	0.00
Delinq. 60+ Sched. Pmnts, 7 Month Prior	0.00	0.00	0.00
Delinq. 60+ Sched. Pmnts, 8 Month Prior	0.00	0.00	0.00
Delinq. 60+ Sched. Pmnts, 9 Month Prior	0.00	0.00	0.00
Delinq. 60+ Sched. Pmnts, 10 Month Prior	0.00	0.00	0.00
Delinq. 60+ Sched. Pmnts, 11 Month Prior	0.00	0.00	0.00





Page 28 of 28

IndyMac IMSC Mortgage Loan Trust 2007-F1 10-D