Analysis
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max time kernel
151s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01-10-2022 22:39
Static task
static1
Behavioral task
behavioral1
Sample
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe
Resource
win10v2004-20220812-en
General
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Target
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe
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Size
194KB
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MD5
68436a755999e7fb559ed5845d25dcf0
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SHA1
3a3989a6c78578f4f2abf5b5ad8e22df5ddf1eb9
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SHA256
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242
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SHA512
843c1946273bbaa9e927aa28324396a432edc998073cf1526f96f29b35ca60ff1a23fd8784a75a2cc3149e1cad5e8e1ccc54d7486b2557fe7bf7db26d85a7a28
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SSDEEP
3072:ZIsuSu37ds9ciftBwTxYJS4r97byrPR+rsJtot/dKAj5gKZaR2q:ZIsuZjiPwgS4QrPEsz0dX1ggI
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
twunk.exepid process 2464 twunk.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
twunk.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ba7d1a7e166b36f0f2566066276e20ce = "\"C:\\ProgramData\\twunk.exe\" .." twunk.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ba7d1a7e166b36f0f2566066276e20ce = "\"C:\\ProgramData\\twunk.exe\" .." twunk.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of AdjustPrivilegeToken 33 IoCs
Processes:
twunk.exedescription pid process Token: SeDebugPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe Token: 33 2464 twunk.exe Token: SeIncBasePriorityPrivilege 2464 twunk.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exetwunk.exedescription pid process target process PID 1264 wrote to memory of 2464 1264 6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe twunk.exe PID 1264 wrote to memory of 2464 1264 6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe twunk.exe PID 2464 wrote to memory of 4756 2464 twunk.exe netsh.exe PID 2464 wrote to memory of 4756 2464 twunk.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe"C:\Users\Admin\AppData\Local\Temp\6aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\ProgramData\twunk.exe"C:\ProgramData\twunk.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\netsh.exenetsh firewall add allowedprogram "C:\ProgramData\twunk.exe" "twunk.exe" ENABLE3⤵
- Modifies Windows Firewall
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\twunk.exeFilesize
194KB
MD568436a755999e7fb559ed5845d25dcf0
SHA13a3989a6c78578f4f2abf5b5ad8e22df5ddf1eb9
SHA2566aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242
SHA512843c1946273bbaa9e927aa28324396a432edc998073cf1526f96f29b35ca60ff1a23fd8784a75a2cc3149e1cad5e8e1ccc54d7486b2557fe7bf7db26d85a7a28
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C:\ProgramData\twunk.exeFilesize
194KB
MD568436a755999e7fb559ed5845d25dcf0
SHA13a3989a6c78578f4f2abf5b5ad8e22df5ddf1eb9
SHA2566aed6fe05d534885dc8983af53044a1a1f0a972f4112499fe21c095877b67242
SHA512843c1946273bbaa9e927aa28324396a432edc998073cf1526f96f29b35ca60ff1a23fd8784a75a2cc3149e1cad5e8e1ccc54d7486b2557fe7bf7db26d85a7a28
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memory/1264-132-0x0000000000490000-0x00000000004C8000-memory.dmpFilesize
224KB
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memory/1264-133-0x00007FFEE87F0000-0x00007FFEE92B1000-memory.dmpFilesize
10.8MB
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memory/1264-137-0x00007FFEE87F0000-0x00007FFEE92B1000-memory.dmpFilesize
10.8MB
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memory/2464-134-0x0000000000000000-mapping.dmp
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memory/2464-138-0x00007FFEE87F0000-0x00007FFEE92B1000-memory.dmpFilesize
10.8MB
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memory/2464-140-0x00007FFEE87F0000-0x00007FFEE92B1000-memory.dmpFilesize
10.8MB
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memory/4756-139-0x0000000000000000-mapping.dmp