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25/03/2025, 15:11
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250205-k785zs1pfn 10Analysis
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max time kernel
119s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20250207-en -
resource tags
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submitted
25/03/2025, 14:56
General
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Target
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
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Size
200KB
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MD5
c2671bf5b5dedbfd3cfe3f0f944fbe01
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SHA1
da3e830011e6f9d41dd6c93fdb48c47c1c6e35e1
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SHA256
226a723ffb4a91d9950a8b266167c5b354ab0db1dc225578494917fe53867ef2
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SHA512
256bc8582cc9b53b3cf9307a2882117476648ab9df540d501fc5f46a4030beacab9df2019f2d83b0a63d510803cbf6cbae01dc1325588f93a1a74521a07fe4d9
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SSDEEP
1536:ssBoz9GFuIdclwKfVPoawSL20mRbg2DrE1mHkrY0f3r6fR0ZzDWR+3itGSh6ZVvg:ssS3oifBoaXhDWA4G3eeJaeIbmC00
Malware Config
Extracted
C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\RecoveryManual.html
href="mailto:[email protected]">[email protected]</a><br>
Signatures
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MountLocker Ransomware
Ransomware family first seen in late 2020, which threatens to leak files if ransom is not paid.
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Mountlocker family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
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Deletes itself 1 IoCs
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Drops desktop.ini file(s) 36 IoCs
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Enumerates connected drives 3 TTPs 1 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 64 IoCs
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System Location Discovery: System Language Discovery 1 TTPs 5 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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Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
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Modifies registry class 5 IoCs
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Suspicious behavior: EnumeratesProcesses 1 IoCs
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Suspicious use of AdjustPrivilegeToken 6 IoCs
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Suspicious use of SetWindowsHookEx 1 IoCs
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Suspicious use of WriteProcessMemory 16 IoCs
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
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Views/modifies file attributes 1 TTPs 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MountLocker_20_11_2020_200KB.exe"C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MountLocker_20_11_2020_200KB.exe"1⤵
- Drops desktop.ini file(s)
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell.exe -windowstyle hidden -c $mypid='2508';[System.IO.File]::ReadAllText('C:\Users\Admin\AppData\Local\Temp\~259431877.tmp')|iex2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\vssadmin.exe"C:\Windows\system32\vssadmin.exe" delete shadows /all /Quiet3⤵
- System Location Discovery: System Language Discovery
- Interacts with shadow copies
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\\0F7749EC.bat" "C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MountLocker_20_11_2020_200KB.exe""2⤵
- Deletes itself
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib -s -r -h "C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MountLocker_20_11_2020_200KB.exe"3⤵
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Windows Management Instrumentation
1Defense Evasion
Direct Volume Access
1Hide Artifacts
1Hidden Files and Directories
1Indicator Removal
2File Deletion
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2KB
MD532e86556c64e1ae275fae7e5a43cf621
SHA18260b48adcd9510192a1a300d7212a369e037f1e
SHA256b706bb6fd63f21486f3ad6bfa286dc7d2afa9bb7d6cda4c0ff178d72f58b5263
SHA51243b6670978ac4019afe9398248433f37db4f0ed6246b49dc6b41ffff10dca309024b65fba07f6f5f946b91a3275a45e12fc42201555aecd40f92f3e59c5f3d3e
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Filesize
65B
MD5348cae913e496198548854f5ff2f6d1e
SHA1a07655b9020205bd47084afd62a8bb22b48c0cdc
SHA256c80128f51871eec3ae2057989a025ce244277c1c180498a5aaef45d5214b8506
SHA512799796736d41d3fcb5a7c859571bb025ca2d062c4b86e078302be68c1a932ed4f78e003640df5405274364b5a9a9c0ba5e37177997683ee7ab54e5267590b611
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Filesize
4KB
MD54e1a1e3e715c291c71950d2fdc79e2be
SHA1dc2b3d20a9ec88e0d8d75c5097154687acc42983
SHA256acf88b9224ae067d92882d1c8ec1461a663e83f02848488ce125dc0538d87a39
SHA512d1be9f6459c248a93c95cc40a68e60ca2fe8068ff4ed5d442437a72bcc09ebf8568e3338d39abebbf3fe8e9e4e3a21a58e1ed6bdbcdd0a3b2ca46b6a81597d80
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Filesize
4KB
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Filesize
5.7MB
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Filesize
5.7MB
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Filesize
5.7MB
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Filesize
5.7MB
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Filesize
5.7MB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
8KB
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Filesize
4KB
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Filesize
60KB
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Filesize
216KB
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Filesize
8KB
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Filesize
60KB
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Filesize
60KB
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Filesize
60KB
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Filesize
8KB
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Filesize
60KB
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Filesize
8KB