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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
29/12/2024, 08:49
Static task
static1
Behavioral task
behavioral1
Sample
JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
Resource
win10v2004-20241007-en
General
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Target
JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
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Size
770KB
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MD5
2158df35900e2a4d4f41e1de55300327
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SHA1
6d574428256ab3774dbab19bb51819fcc02f6b13
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SHA256
6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1
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SHA512
b7c0025a975d4e096a1e3f608f874fb0039049faf43f8a1dc219560ae505ecb49eec40c912245fb1157ee8243023f9a79636918af9f60cbb87801dc8ae8dd38e
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SSDEEP
12288:OT4Ml7IXlXCvYhclHw6OrWijG8ckiheT0fhGK3h4zE7TE0Nrn08EVF98+ctJKdNh:6p7nFlH4qijG8fTM/7BNr08ET9sQb4G
Malware Config
Extracted
djvu
http://fuyt.org/test1/get.php
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extension
.ghas
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offline_id
miqhSGmGE63yWs53FTz0fnp8eCARpnaYE3O3p2t1
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payload_url
http://zerit.top/dl/build2.exe
http://fuyt.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral2/memory/4440-2-0x00000000021E0000-0x00000000022FB000-memory.dmp family_djvu behavioral2/memory/640-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/640-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/640-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/640-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/640-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3652-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3652-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3652-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Djvu 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3612 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c5c17a81-af03-4b2b-9b8a-88e3f0c76431\\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe\" --AutoStart" JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 12 api.2ip.ua 13 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4440 set thread context of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 536 set thread context of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 2800 3652 WerFault.exe 89 -
System Location Discovery: System Language Discovery 1 TTPs 5 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_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 4440 wrote to memory of 640 4440 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 84 PID 640 wrote to memory of 3612 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 85 PID 640 wrote to memory of 3612 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 85 PID 640 wrote to memory of 3612 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 85 PID 640 wrote to memory of 536 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 86 PID 640 wrote to memory of 536 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 86 PID 640 wrote to memory of 536 640 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 86 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89 PID 536 wrote to memory of 3652 536 JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4440 -
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:640 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c5c17a81-af03-4b2b-9b8a-88e3f0c76431" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:3612
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
PID:3652 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3652 -s 5685⤵
- Program crash
PID:2800
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3652 -ip 36521⤵PID:4900
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\c5c17a81-af03-4b2b-9b8a-88e3f0c76431\JaffaCakes118_6397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1.exe
Filesize770KB
MD52158df35900e2a4d4f41e1de55300327
SHA16d574428256ab3774dbab19bb51819fcc02f6b13
SHA2566397718b5684f02c9765ad5921a1f901f678987c8f5f2d02c669354e4915b3c1
SHA512b7c0025a975d4e096a1e3f608f874fb0039049faf43f8a1dc219560ae505ecb49eec40c912245fb1157ee8243023f9a79636918af9f60cbb87801dc8ae8dd38e