Analysis
- max time kernel
150s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
28/01/2023, 00:20
General
- Target file.exe
- Size 293KB
- Sample230128-amsmdseh91
- SHA256 9170175c73ff579232d9e18747bb3183b5f75e7373ffcefa2bd631186ac8f9fe
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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Extracted
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vidar
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2.2
-
19
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https://t.me/litlebey
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https://steamcommunity.com/profiles/76561199472399815
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profile_id
19
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.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 14 IoCs
- VMProtect packed file 6 IoCs
Detects executables packed with VMProtect commercial packer.
- Checks computer location settings 2 TTPs 4 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- 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 3 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.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 16 IoCs
- Suspicious use of WriteProcessMemory 64 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\B3A5.exeC:\Users\Admin\AppData\Local\Temp\B3A5.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 2488 -s 10282⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\B4BF.exeC:\Users\Admin\AppData\Local\Temp\B4BF.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\B4BF.exeC:\Users\Admin\AppData\Local\Temp\B4BF.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\e4f07e1f-ba70-485c-934a-bb0f7e203f1d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\B4BF.exe"C:\Users\Admin\AppData\Local\Temp\B4BF.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\B4BF.exe"C:\Users\Admin\AppData\Local\Temp\B4BF.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build2.exe"C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build2.exe"C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build2.exe" & exit7⤵
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\build3.exe"C:\Users\Admin\AppData\Local\383dca4c-0afa-43e0-b6ac-857456953750\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\B79F.exeC:\Users\Admin\AppData\Local\Temp\B79F.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\B8E8.exeC:\Users\Admin\AppData\Local\Temp\B8E8.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3316 -s 3402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\BF22.exeC:\Users\Admin\AppData\Local\Temp\BF22.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\C3A8.exeC:\Users\Admin\AppData\Local\Temp\C3A8.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3316 -ip 33161⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2488 -ip 24881⤵
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- 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"2⤵
- Creates scheduled task(s)
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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
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
B3A5.exe
B3A5.exe
B4BF.exe
B4BF.exe
B4BF.exe
B4BF.exe
B4BF.exe
B79F.exe
B79F.exe
B8E8.exe
B8E8.exe
BF22.exe
BF22.exe
C3A8.exe
C3A8.exe
B4BF.exe
mstsca.exe
mstsca.exe
svcupdater.exe
svcupdater.exe
memory/536-152-0x0000000140000000-0x0000000140619000-memory.dmp
memory/1668-174-0x0000000000689000-0x000000000069F000-memory.dmp
memory/1668-175-0x00000000004E0000-0x00000000004E9000-memory.dmp
memory/1668-176-0x0000000000400000-0x0000000000465000-memory.dmp
memory/1668-187-0x0000000000400000-0x0000000000465000-memory.dmp
memory/2488-164-0x00000000020A0000-0x00000000020E7000-memory.dmp
memory/2488-163-0x000000000071D000-0x0000000000747000-memory.dmp
memory/2488-165-0x0000000000400000-0x000000000046D000-memory.dmp
memory/2488-184-0x000000000071D000-0x0000000000747000-memory.dmp
memory/2488-186-0x0000000000400000-0x000000000046D000-memory.dmp
memory/2628-159-0x0000000140000000-0x0000000140623000-memory.dmp
memory/2876-171-0x0000000002240000-0x000000000235B000-memory.dmp
memory/2876-170-0x00000000020E2000-0x0000000002174000-memory.dmp
memory/3048-133-0x0000000000470000-0x0000000000570000-memory.dmp
memory/3048-136-0x0000000000400000-0x0000000000465000-memory.dmp
memory/3048-135-0x0000000000400000-0x0000000000465000-memory.dmp
memory/3048-134-0x00000000021B0000-0x00000000021B9000-memory.dmp
memory/3200-192-0x0000000002038000-0x00000000020CA000-memory.dmp
memory/3316-178-0x00000000007C9000-0x00000000007DF000-memory.dmp
memory/3316-177-0x0000000000400000-0x000000000046B000-memory.dmp
memory/3324-213-0x0000000000400000-0x000000000046A000-memory.dmp
memory/3324-245-0x0000000000400000-0x000000000046A000-memory.dmp
memory/3324-223-0x0000000060900000-0x0000000060992000-memory.dmp
memory/3324-216-0x0000000000400000-0x000000000046A000-memory.dmp
memory/3324-214-0x0000000000400000-0x000000000046A000-memory.dmp
memory/3324-210-0x0000000000400000-0x000000000046A000-memory.dmp
memory/3344-222-0x000000000080C000-0x0000000000836000-memory.dmp
memory/3344-220-0x0000000000400000-0x000000000046D000-memory.dmp
memory/3344-219-0x000000000080C000-0x0000000000836000-memory.dmp
memory/3472-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3472-221-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3472-193-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3472-198-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3600-185-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3600-169-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3600-172-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3600-173-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3600-167-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4584-215-0x0000000000550000-0x00000000005A6000-memory.dmp
memory/4584-212-0x000000000060D000-0x000000000063E000-memory.dmp