Analysis
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max time kernel
140s -
max time network
125s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
14-06-2024 02:20
Static task
static1
Behavioral task
behavioral1
Sample
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
Resource
win10v2004-20240508-en
General
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Target
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
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Size
66KB
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MD5
b6cf492f580943b7f3c5a6115e2b783f
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SHA1
44452b62ad27d90f5c5010f1cf813012705e24f8
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SHA256
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84
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SHA512
6e63186895ee399f27ce93aab963c9e5cff0d5cdab0084f1a67ce5b267c51018cea8a755a17d1a2cf179884e9ea3c6dcbd4aa6fcb0d0326341cfd0d6ee99328b
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SSDEEP
768:ZrItKyw5WHXfQIhIiIk9ecAaVPD96KyX6P:Zr3Z5IfQIR81ad5yX6P
Malware Config
Signatures
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Detects Windows executables referencing non-Windows User-Agents 4 IoCs
Processes:
resource yara_rule behavioral2/memory/3456-0-0x0000000000400000-0x0000000000411000-memory.dmp INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA C:\Windows\debug\rgkhost.exe INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA behavioral2/memory/3792-5-0x0000000000400000-0x0000000000411000-memory.dmp INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA behavioral2/memory/3792-6-0x0000000000400000-0x0000000000411000-memory.dmp INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA -
Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe -
Executes dropped EXE 1 IoCs
Processes:
rgkhost.exepid process 3792 rgkhost.exe -
Drops file in Windows directory 3 IoCs
Processes:
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exeattrib.exedescription ioc process File created C:\Windows\Debug\rgkhost.exe a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe File opened for modification C:\Windows\Debug\rgkhost.exe a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe File opened for modification C:\Windows\Debug\rgkhost.exe attrib.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exedescription pid process Token: SeIncBasePriorityPrivilege 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exedescription pid process target process PID 3456 wrote to memory of 3732 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe attrib.exe PID 3456 wrote to memory of 3732 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe attrib.exe PID 3456 wrote to memory of 3732 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe attrib.exe PID 3456 wrote to memory of 3104 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe cmd.exe PID 3456 wrote to memory of 3104 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe cmd.exe PID 3456 wrote to memory of 3104 3456 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe cmd.exe -
Views/modifies file attributes 1 TTPs 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3456 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\rgkhost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:3732
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A7ECA8~1.EXE > nul2⤵PID:3104
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C:\Windows\Debug\rgkhost.exeC:\Windows\Debug\rgkhost.exe1⤵
- Executes dropped EXE
PID:3792
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
66KB
MD5f1167e3ac008c6264e8e9485df343051
SHA179daf063544bec73011b1d0f69fd922b56828a24
SHA25641b53c9d0de248bc19cd0ce32c13b30c59e4c0c7600ef86cbee3b7fdbe97dd17
SHA5129d40bd7a0517b971ed97e93fc16dbfc9984ea38ea6c5ae2e32eb733951eaee90666ac8d20cc244639b1de909c0cf3c945306ce0120c0e48285ce496652895083