Analysis
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max time kernel
90s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
29/12/2022, 12:17
Static task
static1
Behavioral task
behavioral1
Sample
8cb2f80304f1f188fb8769e9ba089a1f.exe
Resource
win7-20220812-en
6 signatures
150 seconds
General
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Target
8cb2f80304f1f188fb8769e9ba089a1f.exe
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Size
318KB
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MD5
8cb2f80304f1f188fb8769e9ba089a1f
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SHA1
e3f3542bafcfb7b7efba45ccb719e607ff462d9c
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SHA256
f3a7d831c9fa8577a6dffae63ca18f8c05274b49a5a0f3a6091165fe1a212d85
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SHA512
cf4f6db594e2b7da74b66d4b874988ed52bbe3914bc2d180ecb72d38d19fe89472d1cd6739bff0379772f2d321a0eb2427f25d12ea81b236692690a599b5c090
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SSDEEP
6144:i0LTNZRJ5OkhT01z2Qnn+FfYcbdhA3xqMVi3tm:FPVOkm1z2s+vdAqii3tm
Malware Config
Extracted
Family
nymaim
C2
45.139.105.171
85.31.46.167
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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation 8cb2f80304f1f188fb8769e9ba089a1f.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 7 IoCs
pid pid_target Process procid_target 2436 528 WerFault.exe 79 3476 528 WerFault.exe 79 4956 528 WerFault.exe 79 800 528 WerFault.exe 79 4216 528 WerFault.exe 79 4132 528 WerFault.exe 79 1116 528 WerFault.exe 79 -
Kills process with taskkill 1 IoCs
pid Process 3588 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3588 taskkill.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 528 wrote to memory of 4360 528 8cb2f80304f1f188fb8769e9ba089a1f.exe 95 PID 528 wrote to memory of 4360 528 8cb2f80304f1f188fb8769e9ba089a1f.exe 95 PID 528 wrote to memory of 4360 528 8cb2f80304f1f188fb8769e9ba089a1f.exe 95 PID 4360 wrote to memory of 3588 4360 cmd.exe 98 PID 4360 wrote to memory of 3588 4360 cmd.exe 98 PID 4360 wrote to memory of 3588 4360 cmd.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:528 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 6842⤵
- Program crash
PID:2436
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 7362⤵
- Program crash
PID:3476
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 9162⤵
- Program crash
PID:4956
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 9162⤵
- Program crash
PID:800
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 7922⤵
- Program crash
PID:4216
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 9722⤵
- Program crash
PID:4132
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
PID:4360 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3588
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 11562⤵
- Program crash
PID:1116
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 528 -ip 5281⤵PID:1904
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 528 -ip 5281⤵PID:2828
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 528 -ip 5281⤵PID:216
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 528 -ip 5281⤵PID:3772
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 528 -ip 5281⤵PID:2384
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 528 -ip 5281⤵PID:1840
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 528 -ip 5281⤵PID:3336