Analysis
- max time kernel
150s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
26/01/2023, 20:18
General
- Target file.exe
- Size 200KB
- Sample230126-y29ffsfc83
- SHA256 0ef7b8cc63d0c37976242e1e0ec9f17e343694e44f3743a2bbedff169669dc44
Malware Config
Extracted
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djvu
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http://drampik.com/lancer/get.php
-
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
-
ransomnote
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Extracted
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vidar
-
2.2
-
19
-
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 16 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 3 IoCs
- Checks SCSI registry key(s) 3 TTPs 9 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 20 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\1BD5.exeC:\Users\Admin\AppData\Local\Temp\1BD5.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 3652 -s 8082⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\1CFF.exeC:\Users\Admin\AppData\Local\Temp\1CFF.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\1CFF.exeC:\Users\Admin\AppData\Local\Temp\1CFF.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\abab6819-be9d-4881-a160-2b65b635e290" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\1CFF.exe"C:\Users\Admin\AppData\Local\Temp\1CFF.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\1CFF.exe"C:\Users\Admin\AppData\Local\Temp\1CFF.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\build2.exe"C:\Users\Admin\AppData\Local\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\build2.exe"C:\Users\Admin\AppData\Local\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\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\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\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\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\build3.exe"C:\Users\Admin\AppData\Local\24b8a9e2-531c-4ce5-8805-8794a1bfbbd5\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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-
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C:\Users\Admin\AppData\Local\Temp\1EE4.exeC:\Users\Admin\AppData\Local\Temp\1EE4.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\1FFE.exeC:\Users\Admin\AppData\Local\Temp\1FFE.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4156 -s 3482⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\26F5.exeC:\Users\Admin\AppData\Local\Temp\26F5.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\2C64.exeC:\Users\Admin\AppData\Local\Temp\2C64.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4156 -ip 41561⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3652 -ip 36521⤵
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C:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exeC:\Users\Admin\AppData\Roaming\Win32Sync\svcupdater.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\cathtucC:\Users\Admin\AppData\Roaming\cathtuc1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4704 -s 3402⤵
- Program crash
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C:\Users\Admin\AppData\Roaming\cbthtucC:\Users\Admin\AppData\Roaming\cbthtuc1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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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:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4704 -ip 47041⤵
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
1BD5.exe
1BD5.exe
1CFF.exe
1CFF.exe
1CFF.exe
1CFF.exe
1CFF.exe
1EE4.exe
1EE4.exe
1FFE.exe
1FFE.exe
26F5.exe
26F5.exe
2C64.exe
2C64.exe
1CFF.exe
mstsca.exe
mstsca.exe
svcupdater.exe
svcupdater.exe
cathtuc
cathtuc
cbthtuc
cbthtuc
memory/216-165-0x0000000000400000-0x0000000000537000-memory.dmp
memory/216-177-0x0000000000400000-0x0000000000537000-memory.dmp
memory/216-168-0x0000000000400000-0x0000000000537000-memory.dmp
memory/216-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/216-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1808-171-0x0000000000400000-0x0000000002B9B000-memory.dmp
memory/1808-180-0x0000000000400000-0x0000000002B9B000-memory.dmp
memory/1808-170-0x0000000002C10000-0x0000000002C19000-memory.dmp
memory/1808-167-0x0000000002D69000-0x0000000002D7C000-memory.dmp
memory/3192-218-0x000000000071C000-0x0000000000746000-memory.dmp
memory/3192-206-0x000000000071C000-0x0000000000746000-memory.dmp
memory/3192-208-0x0000000000400000-0x000000000046D000-memory.dmp
memory/3192-207-0x00000000020A0000-0x00000000020E7000-memory.dmp
memory/3240-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3240-209-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3240-193-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3240-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3540-169-0x0000000004900000-0x0000000004A1B000-memory.dmp
memory/3540-166-0x0000000004862000-0x00000000048F3000-memory.dmp
memory/3652-173-0x0000000002060000-0x00000000020A7000-memory.dmp
memory/3652-174-0x0000000000400000-0x000000000046D000-memory.dmp
memory/3652-172-0x00000000006CD000-0x00000000006F6000-memory.dmp
memory/3652-185-0x0000000000400000-0x000000000046D000-memory.dmp
memory/3728-192-0x0000000004868000-0x00000000048F9000-memory.dmp
memory/4156-175-0x0000000002C9D000-0x0000000002CB0000-memory.dmp
memory/4156-176-0x0000000000400000-0x0000000002B9D000-memory.dmp
memory/4496-219-0x0000000060900000-0x0000000060992000-memory.dmp
memory/4496-249-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4496-216-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4496-214-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4496-240-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4496-217-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4496-211-0x0000000000400000-0x000000000046A000-memory.dmp
memory/4620-215-0x0000000000600000-0x0000000000656000-memory.dmp
memory/4620-213-0x00000000006ED000-0x000000000071E000-memory.dmp
memory/4704-253-0x0000000002C89000-0x0000000002C9C000-memory.dmp
memory/4792-154-0x0000000140000000-0x0000000140623000-memory.dmp
memory/5016-156-0x0000000140000000-0x0000000140623000-memory.dmp
memory/5064-134-0x0000000000400000-0x0000000002B9C000-memory.dmp
memory/5064-132-0x0000000002EB9000-0x0000000002ECC000-memory.dmp
memory/5064-133-0x0000000002DF0000-0x0000000002DF9000-memory.dmp
memory/5064-135-0x0000000000400000-0x0000000002B9C000-memory.dmp
memory/5080-251-0x0000000002C39000-0x0000000002C4C000-memory.dmp
memory/5080-252-0x0000000000400000-0x0000000002B9B000-memory.dmp
memory/5080-254-0x0000000000400000-0x0000000002B9B000-memory.dmp