Resubmissions
25/03/2025, 15:17
250325-spj25s1qz4 1007/02/2025, 02:05
250207-ch85pavlcw 1005/02/2025, 09:52
250205-lv9resspek 1004/02/2025, 01:46
250204-b63gdasncq 10Analysis
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max time kernel
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max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20250129-en -
resource tags
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submitted
05/02/2025, 09:52
General
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Target
2025-02-04_24065b8ee2f59431f5d227cf619d7965_mafia.exe
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Size
219KB
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MD5
24065b8ee2f59431f5d227cf619d7965
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SHA1
523be526b80b0216bf1fe46dfb9391cf3f0576a0
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SHA256
7f61eda7f9a77d6a594354ef8fbe92ad8f5aff8a696468a80c47ea3e9f640826
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SHA512
b01f878d2507211606bb02cecd386b2d8cfd2922ede94fadb8199826f4174d0406cfb4f77d822022a55b5f5971c89a52604b22086f34e8c078f358aceb737621
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SSDEEP
3072:7ZMTthZ1HyTpSmJhbE0sYVQYAfF0Cq3KXB4mKVTNp4qYNu5nm+5XBNMYEmZ:7ZMLtmJ2056790CqivKVjnYNsB
Malware Config
Extracted
C:\$Recycle.Bin\KRAB-DECRYPT.txt
http://gandcrabmfe6mnef.onion/f55f7efa4b923ebe
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Gandcrab family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (248) 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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Drops file in Program Files directory 24 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\2025-02-04_24065b8ee2f59431f5d227cf619d7965_mafia.exeC:\Users\Admin\AppData\Local\Temp\2025-02-04_24065b8ee2f59431f5d227cf619d7965_mafia.exe dsrm -subtree -noprompt -c user"http://+:443"1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- 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
MD538a3c2534bae152cbd102b158cf28390
SHA1b6df79504b2943197ae6d2225d8dae28791c443d
SHA256120e9f97f20c1979f2e1c4128b69ab78ed67d2e3154cf6f19b3d11b14e979179
SHA51222a76721b35e11c81eaa980b9bc4875aee4a80c6bddb2b4bdb0565aefac7d7aca574b35c989af7f073e2c2c2f7c1a104c4c47c29f2493b93095233588f987546
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Filesize
68KB
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Filesize
152KB
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Filesize
68KB
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Filesize
240KB
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Filesize
152KB
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Filesize
240KB