Analysis
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max time kernel
1799s -
max time network
1599s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
19-04-2023 12:46
Behavioral task
behavioral1
Sample
ClientH.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
ClientH.exe
Resource
win10v2004-20230220-en
General
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Target
ClientH.exe
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Size
90KB
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MD5
b296864bb2a6846e9b1a59b6e613f7b3
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SHA1
529c91595ea7b43ca93c1ad55d7f445841e9f536
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SHA256
4ce0eb37a2076db86260f2dbf67dbc34c5e5c79e2fa7895458b5113ea308a2ba
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SHA512
77a16f9c3e5b6a983f24618cdcfd65d8dedef2995c3f9399f4c73b11b1b4b0ed8927c69aed3ceda9c4e7151a46263dc085a17fbdaf3ae6a8de691551708fcd7e
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SSDEEP
1536:tbRiQM/57SK3bUzZdQ1iIMvnZlbLxjV3AGq5gWlocT1wzySsd9NJ33v:tbR457SKsstcnZTJQDgWPaySsdH5/
Malware Config
Extracted
arrowrat
VenomHVNC
notfishvr3333338-52100.portmap.host:52100
qCsPvqtHt.exe
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
ClientH.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\ZSGDXzaA\\ZSGDXzaA" ClientH.exe -
Modifies Installed Components in the registry 2 TTPs 1 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Active Setup\Installed Components explorer.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
ClientH.exedescription pid process target process PID 2032 set thread context of 1628 2032 ClientH.exe cvtres.exe -
Modifies registry class 5 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_Classes\Local Settings explorer.exe Key created \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell explorer.exe Key created \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff explorer.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
ClientH.exepid process 2032 ClientH.exe -
Suspicious use of AdjustPrivilegeToken 22 IoCs
Processes:
ClientH.exeexplorer.exeAUDIODG.EXEdescription pid process Token: SeDebugPrivilege 2032 ClientH.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: 33 916 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 916 AUDIODG.EXE Token: 33 916 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 916 AUDIODG.EXE Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe Token: SeShutdownPrivilege 2028 explorer.exe -
Suspicious use of FindShellTrayWindow 30 IoCs
Processes:
explorer.exepid process 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe -
Suspicious use of SendNotifyMessage 19 IoCs
Processes:
explorer.exepid process 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe 2028 explorer.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
ClientH.exeexplorer.exedescription pid process target process PID 2032 wrote to memory of 2028 2032 ClientH.exe explorer.exe PID 2032 wrote to memory of 2028 2032 ClientH.exe explorer.exe PID 2032 wrote to memory of 2028 2032 ClientH.exe explorer.exe PID 2032 wrote to memory of 2028 2032 ClientH.exe explorer.exe PID 2028 wrote to memory of 1828 2028 explorer.exe ctfmon.exe PID 2028 wrote to memory of 1828 2028 explorer.exe ctfmon.exe PID 2028 wrote to memory of 1828 2028 explorer.exe ctfmon.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe PID 2032 wrote to memory of 1628 2032 ClientH.exe cvtres.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\ClientH.exe"C:\Users\Admin\AppData\Local\Temp\ClientH.exe"1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032 -
C:\Windows\explorer.exe"C:\Windows\explorer.exe"2⤵
- Modifies Installed Components in the registry
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2028 -
C:\Windows\system32\ctfmon.exectfmon.exe3⤵PID:1828
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" VenomHVNC notfishvr3333338-52100.portmap.host 52100 qCsPvqtHt.exe2⤵PID:1628
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x5641⤵
- Suspicious use of AdjustPrivilegeToken
PID:916
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/1628-60-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-55-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-56-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-57-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-58-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-59-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmpFilesize
4KB
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memory/1628-63-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-65-0x0000000000400000-0x0000000000410000-memory.dmpFilesize
64KB
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memory/1628-66-0x0000000004A00000-0x0000000004A40000-memory.dmpFilesize
256KB
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memory/2028-67-0x0000000003BE0000-0x0000000003BE1000-memory.dmpFilesize
4KB
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memory/2028-68-0x0000000003BE0000-0x0000000003BE1000-memory.dmpFilesize
4KB
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memory/2028-72-0x0000000002650000-0x0000000002660000-memory.dmpFilesize
64KB
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memory/2032-54-0x0000000000DE0000-0x0000000000DFC000-memory.dmpFilesize
112KB