Analysis
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max time kernel
146s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
21-10-2024 01:40
General
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Target
2024-10-21_a0c1b4301b5c438659f8af7b18f94a15_gandcrab.exe
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Size
93KB
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MD5
a0c1b4301b5c438659f8af7b18f94a15
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SHA1
577c5c9c8a2310d25a51afaf3a0e91395b9b8784
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SHA256
f5aaca5c1ceebd3facddb259a6b8a7b66479d4971e21b8ef12308cb9ec91a864
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SHA512
4e285d99d1a332d17abfab8e28a8bbb99803f96db4e0be000ce55a8780a6f80f7a1235857eaf75ff975a5b0b8a41fc211c3a491835e96047cbb7262a75e328d8
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SSDEEP
1536:i8I5zikGDU3YpVhzLLpcJCUZgp2kepphlBbhzOcrHuTcWN9:5MGkcwuVhvLeCEPkepPfhzjHU
Malware Config
Extracted
F:\$RECYCLE.BIN\S-1-5-21-4089630652-1596403869-279772308-1000\CULLAHEGNS-MANUAL.txt
gandcrab
http://gandcrabmfe6mnef.onion/2a8c2e4668fbb7f3
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (294) 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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Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
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Drops startup file 2 IoCs
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Reads user/profile data of web browsers 3 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 27 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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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\2024-10-21_a0c1b4301b5c438659f8af7b18f94a15_gandcrab.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-21_a0c1b4301b5c438659f8af7b18f94a15_gandcrab.exe"1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- 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⤵
- System Location Discovery: System Language Discovery
- 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 Enterprise v15
Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
8KB
MD5a8205fd7fb74e4eb1a75e7700e2e0511
SHA1bab6af30d27a60d17885137363a91334e7f4386a
SHA256aff4f4ba280454b66d44b73371bbe2b2e0507b470e53a39468fcfc1d19b28cd7
SHA512c4b810e66362d8a6efe419bf8e3b76de727acaec9ea697995d1f10343aafca94a1470b0ebe87ccd3d3d5d27cff31a4793f5ddc976f135984ed382c00b3462862