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Analysis
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max time kernel
162s -
max time network
172s -
platform
windows10-2004_x64 -
resource
win10v2004-20230221-en -
resource tags
arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system -
submitted
10/03/2023, 11:26
Static task
static1
Behavioral task
behavioral1
Sample
b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe
Resource
win7-20230220-en
General
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Target
b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe
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Size
332KB
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MD5
be8060c6a8398acadab32498f98f5556
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SHA1
e759f4222f13d900ba19a2c7fc911a9dcd8a0909
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SHA256
b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522
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SHA512
3f649fb726039bb4ff4ed3186de7141c1b3ad0911f6ea7fefef0fef3f08abefafa70faa870a6b9eafbd5f3ab58dfb45be165ed52f87ede1155fefbab4ae4d6ad
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SSDEEP
6144:QVXnCBimgu6LoCECJQv/zox+ePEczZ+mWdZe5+wOC0K:QxCBim4dECy/Ex+enQZXw5n
Malware Config
Extracted
gcleaner
45.12.253.56
45.12.253.72
45.12.253.98
45.12.253.75
Signatures
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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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 8 IoCs
pid pid_target Process procid_target 3844 1952 WerFault.exe 84 4812 1952 WerFault.exe 84 3804 1952 WerFault.exe 84 4944 1952 WerFault.exe 84 508 1952 WerFault.exe 84 2852 1952 WerFault.exe 84 4672 1952 WerFault.exe 84 1392 1952 WerFault.exe 84 -
Kills process with taskkill 1 IoCs
pid Process 1784 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1784 taskkill.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1952 wrote to memory of 4256 1952 b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe 104 PID 1952 wrote to memory of 4256 1952 b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe 104 PID 1952 wrote to memory of 4256 1952 b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe 104 PID 4256 wrote to memory of 1784 4256 cmd.exe 108 PID 4256 wrote to memory of 1784 4256 cmd.exe 108 PID 4256 wrote to memory of 1784 4256 cmd.exe 108
Processes
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C:\Users\Admin\AppData\Local\Temp\b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe"C:\Users\Admin\AppData\Local\Temp\b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1952 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 7482⤵
- Program crash
PID:3844
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 7882⤵
- Program crash
PID:4812
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 9282⤵
- Program crash
PID:3804
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 9362⤵
- Program crash
PID:4944
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 7842⤵
- Program crash
PID:508
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 7922⤵
- Program crash
PID:2852
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 9722⤵
- Program crash
PID:4672
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
PID:4256 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "b4a0890b7b896b28d86af7c066ce54f9a9f51e17fc7e78349a1ceee92114f522.exe" /f3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1784
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 9402⤵
- Program crash
PID:1392
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1952 -ip 19521⤵PID:3960
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 396 -p 1952 -ip 19521⤵PID:2316
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1952 -ip 19521⤵PID:3700
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1952 -ip 19521⤵PID:3036
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1952 -ip 19521⤵PID:924
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1952 -ip 19521⤵PID:2756
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1952 -ip 19521⤵PID:1056
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1952 -ip 19521⤵PID:2256