Analysis
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max time kernel
139s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
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submitted
01-05-2024 08:44
General
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Target
GandCrab.exe
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Size
183KB
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MD5
07fadb006486953439ce0092651fd7a6
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SHA1
e42431d37561cc695de03b85e8e99c9e31321742
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SHA256
d77378dcc42b912e514d3bd4466cdda050dda9b57799a6c97f70e8489dd8c8d0
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SHA512
5b09a07371bb5350b22c78aa3e7e673ba61ce72a964e072749a4633e2c15f416c05953cc6e6f6c586df010aa7f2c9c0ab87a014e4f732e5fdb2d58778a1fb437
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SSDEEP
3072:Ealy19emgKe0QuYS3UmWuDTEltI3S/7IarDrjCgrQp0M7W:EaqxxDwx/7IS40MS
Malware Config
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (288) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Drops startup file 2 IoCs
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
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Drops file in Program Files directory 28 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
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Suspicious behavior: EnumeratesProcesses 4 IoCs
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Suspicious use of AdjustPrivilegeToken 45 IoCs
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Suspicious use of WriteProcessMemory 3 IoCs
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\GandCrab.exe"C:\Users\Admin\AppData\Local\Temp\GandCrab.exe"1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\wbem\wmic.exe"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\$Recycle.Bin\S-1-5-21-2818691465-3043947619-2475182763-1000\OIMJS-DECRYPT.htmlFilesize
64KB
MD5bae6a37b73a9c06e75aee48ab353739d
SHA18f7e8cb8cc770d1a77560df1623ff338bcd5c1a2
SHA256b603926b4455b69204248162b5e7f4657b35b28075f453c40ebfdda77513de8c
SHA5124432605524099270731db8d4896580d49522be65f8a70177a0352c44bfa0a7dbe598895559795f6fb32ff4a4d17f08bdf08f61eed9d5a969e18550c87c1276be