Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/09/2022, 21:46
General
- Target file.exe
- Size 204KB
- Sample220905-1mlrysade7
- SHA256 db712cfee73091f2f54d00783998b90b73cff3f8ebf651814e499f3b1d8c2f4a
Malware Config
Extracted
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djvu
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http://acacaca.org/lancer/get.php
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extension
.oodt
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offline_id
6GXhR4uyHH9NXT2qot14T0HeNSviNKH0Q6PGVNt1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
- Detected Djvu ransomware 9 IoCs
- Detects Smokeloader packer 1 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 4 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 29 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\360F.exeC:\Users\Admin\AppData\Local\Temp\360F.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\360F.exeC:\Users\Admin\AppData\Local\Temp\360F.exe2⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\12a703da-15c0-4dea-9c22-3a1656ca6903" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\360F.exe"C:\Users\Admin\AppData\Local\Temp\360F.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\360F.exe"C:\Users\Admin\AppData\Local\Temp\360F.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
360F.exe
360F.exe
360F.exe
360F.exe
360F.exe
360F.exe
memory/444-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/444-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/444-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2840-156-0x0000000004841000-0x00000000048D3000-memory.dmp
memory/3736-143-0x000000000480E000-0x00000000048A0000-memory.dmp
memory/3736-144-0x00000000049B0000-0x0000000004ACB000-memory.dmp
memory/4676-132-0x0000000002CFD000-0x0000000002D0D000-memory.dmp
memory/4676-133-0x0000000002CD0000-0x0000000002CD9000-memory.dmp
memory/4676-134-0x0000000000400000-0x0000000002B7E000-memory.dmp
memory/4676-135-0x0000000000400000-0x0000000002B7E000-memory.dmp