Analysis
- max time kernel
150s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
26/01/2023, 10:03
General
- Target file.exe
- Size 201KB
- Sample230126-l3cfwsdc59
- SHA256 8a9b94d66d13ce33d3b6dcec52fc74501bdf6536fdb438e11a66c00d3ed0e809
Malware Config
Extracted
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djvu
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http://drampik.com/lancer/get.php
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extension
.mzop
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offline_id
ex4uvTKsM2vEkIcr3MjXi2C6v27h1mS682iUXGt1
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payload_url
http://uaery.top/dl/build2.exe
http://drampik.com/files/1/build3.exe
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ransomnote
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Signatures
- Detected Djvu ransomware 10 IoCs
- Detects Smokeloader packer 2 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 12 IoCs
- VMProtect packed file 6 IoCs
Detects executables packed with VMProtect commercial packer.
- Checks computer location settings 2 TTPs 3 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 3 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.
- Program crash 2 IoCs
- Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 10 IoCs
- Suspicious use of WriteProcessMemory 54 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\DDD2.exeC:\Users\Admin\AppData\Local\Temp\DDD2.exe1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn "svcupdater" /tr "C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe" /st 00:00 /du 9999:59 /sc once /ri 1 /f2⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1640 -s 10282⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\DF69.exeC:\Users\Admin\AppData\Local\Temp\DF69.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\DF69.exeC:\Users\Admin\AppData\Local\Temp\DF69.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\ba1791bd-3e9e-454c-9b89-9191ad697d9c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\DF69.exe"C:\Users\Admin\AppData\Local\Temp\DF69.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\DF69.exe"C:\Users\Admin\AppData\Local\Temp\DF69.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\212723b7-2de0-44b9-bac9-c7a779a83db8\build2.exe"C:\Users\Admin\AppData\Local\212723b7-2de0-44b9-bac9-c7a779a83db8\build2.exe"5⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\212723b7-2de0-44b9-bac9-c7a779a83db8\build3.exe"C:\Users\Admin\AppData\Local\212723b7-2de0-44b9-bac9-c7a779a83db8\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\E2E5.exeC:\Users\Admin\AppData\Local\Temp\E2E5.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\E44D.exeC:\Users\Admin\AppData\Local\Temp\E44D.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 3442⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\EA0B.exeC:\Users\Admin\AppData\Local\Temp\EA0B.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\EEFD.exeC:\Users\Admin\AppData\Local\Temp\EEFD.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 208 -ip 2081⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1640 -ip 16401⤵
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C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exeC:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build3.exe
build3.exe
DDD2.exe
DDD2.exe
DF69.exe
DF69.exe
DF69.exe
DF69.exe
DF69.exe
E2E5.exe
E2E5.exe
E44D.exe
E44D.exe
EA0B.exe
EA0B.exe
EEFD.exe
EEFD.exe
DF69.exe
svcupdater.exe
svcupdater.exe
memory/208-178-0x0000000002CAD000-0x0000000002CC0000-memory.dmp
memory/208-177-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/1480-208-0x0000000000400000-0x000000000046D000-memory.dmp
memory/1480-210-0x00000000004FC000-0x0000000000526000-memory.dmp
memory/1480-207-0x00000000004FC000-0x0000000000526000-memory.dmp
memory/1640-174-0x0000000001FA0000-0x0000000001FE7000-memory.dmp
memory/1640-182-0x000000000071D000-0x0000000000747000-memory.dmp
memory/1640-173-0x000000000071D000-0x0000000000747000-memory.dmp
memory/1640-184-0x0000000000400000-0x000000000046D000-memory.dmp
memory/1640-175-0x0000000000400000-0x000000000046D000-memory.dmp
memory/1644-167-0x0000000004940000-0x0000000004A5B000-memory.dmp
memory/1644-166-0x00000000048A7000-0x0000000004938000-memory.dmp
memory/2608-197-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2608-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2608-192-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2608-209-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2644-151-0x0000000140000000-0x0000000140623000-memory.dmp
memory/3184-158-0x0000000140000000-0x0000000140623000-memory.dmp
memory/3464-133-0x0000000002D30000-0x0000000002D39000-memory.dmp
memory/3464-132-0x0000000002D6D000-0x0000000002D80000-memory.dmp
memory/3464-134-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/3464-135-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/3568-168-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3568-169-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3568-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3568-165-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3568-186-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4164-170-0x0000000002D8D000-0x0000000002DA0000-memory.dmp
memory/4164-171-0x0000000002CF0000-0x0000000002CF9000-memory.dmp
memory/4164-181-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/4164-172-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/4272-191-0x0000000004880000-0x0000000004911000-memory.dmp