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Analysis
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max time kernel
137s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20250217-en -
resource tags
arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system -
submitted
26/02/2025, 11:10
Static task
static1
Behavioral task
behavioral1
Sample
JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe
Resource
win7-20240729-en
General
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Target
JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe
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Size
827KB
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MD5
2589da5a4c697b83b4bef9dccdd65c10
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SHA1
356a0f37f0b9271aceb33c1177bb1e27edcf74d5
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SHA256
038c8da9639da5bbf5049937b49bc4783f8afeb907903a6c7b12cbed4e697659
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SHA512
e3b67d20836750b27ba6408ec4c7a405a8c00882aa9819ca33a0fd11d0e529d209c90f213485bae28bb02810c92d546006d72b21f3bbf1f988bbfd2b11759dbc
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SSDEEP
12288:slMB8Ai4XCNGijE4DFogliG4jTEzP25oc5ccxnmf7T:wMB8Z77td4ncT25L5Pmf7T
Malware Config
Signatures
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ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
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ISR Stealer payload 3 IoCs
resource yara_rule behavioral2/memory/1428-25-0x0000000000400000-0x0000000000435000-memory.dmp family_isrstealer behavioral2/memory/1428-21-0x0000000000400000-0x0000000000435000-memory.dmp family_isrstealer behavioral2/memory/1428-43-0x0000000000400000-0x0000000000435000-memory.dmp family_isrstealer -
Isrstealer family
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1294999112-580688058-1763548717-1000\Control Panel\International\Geo\Nation JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe -
Executes dropped EXE 3 IoCs
pid Process 5028 KWwjC.exe 1428 cvtres.exe 820 cvtres.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 5028 set thread context of 1428 5028 KWwjC.exe 89 PID 1428 set thread context of 820 1428 cvtres.exe 90 -
resource yara_rule behavioral2/memory/820-33-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/820-37-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/820-32-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/820-28-0x0000000000400000-0x0000000000453000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language KWwjC.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cvtres.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cvtres.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 5028 KWwjC.exe 5028 KWwjC.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 5028 KWwjC.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1428 cvtres.exe -
Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 1216 wrote to memory of 5028 1216 JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe 87 PID 1216 wrote to memory of 5028 1216 JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe 87 PID 1216 wrote to memory of 5028 1216 JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe 87 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 5028 wrote to memory of 1428 5028 KWwjC.exe 89 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90 PID 1428 wrote to memory of 820 1428 cvtres.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2589da5a4c697b83b4bef9dccdd65c10.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1216 -
C:\Users\Admin\AppData\Local\Temp\KWwjC.exe"C:\Users\Admin\AppData\Local\Temp\KWwjC.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5028 -
C:\Users\Admin\AppData\Local\Temp\cvtres.exeC:\Users\Admin\AppData\Local\Temp\\cvtres.exe3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1428 -
C:\Users\Admin\AppData\Local\Temp\cvtres.exe/scomma "C:\Users\Admin\AppData\Local\Temp\sVogOE14Qp.ini"4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:820
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
295KB
MD53b9cb4e2682bff76dad8a06a54fe3c68
SHA16e5fd981dc8e09e53f7741b04438160328481571
SHA256b66f7c8317482209ae76910e80188763fb5c218670148c9d38ba0f0e5e3edf66
SHA51243fed22c6cc7a4d496adaa7285f8eae97f87c70c8368269b09d66c110874566f2b42101c25123677919427cb7cd2061ef0776c53e1af503865d9094a692d927b
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Filesize
34KB
MD5e118330b4629b12368d91b9df6488be0
SHA1ce90218c7e3b90df2a3409ec253048bb6472c2fd
SHA2563a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9
SHA512ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0
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Filesize
5B
MD5d1ea279fb5559c020a1b4137dc4de237
SHA1db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3