Analysis
- max time kernel
156s - max time network
145s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
04/10/2022, 15:02
General
- Target file.exe
- Size 265KB
- Sample221004-sefa7sbfcl
- SHA256 dab60c2391d8adb01bc1dee7356fc2ea7845d92f6a3ba1d0e56cb1ee7d3a9549
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.adww
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offline_id
z8lhl4oForVEc7gy9Ra8rSqjYMl3xiFRuIW4not1
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payload_url
http://rgyui.top/dl/build2.exe
http://winnlinne.com/files/1/build3.exe
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ransomnote
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Extracted
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vidar
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54.9
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517
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https://t.me/larsenup
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https://ioc.exchange/@zebra54
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profile_id
517
Signatures
- Detected Djvu ransomware 11 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.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 9 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 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 Microsoft Outlook profiles 1 TTPs 3 IoCs
- 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 9 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 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 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 5 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of WriteProcessMemory 64 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 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\5A16.exeC:\Users\Admin\AppData\Local\Temp\5A16.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\5A16.exeC:\Users\Admin\AppData\Local\Temp\5A16.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\83b8aa20-7617-4b8b-957d-cc34e70c17e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\5A16.exe"C:\Users\Admin\AppData\Local\Temp\5A16.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\5A16.exe"C:\Users\Admin\AppData\Local\Temp\5A16.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build2.exe"C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build2.exe"C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build2.exe"6⤵
- Executes dropped EXE
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build3.exe"C:\Users\Admin\AppData\Local\c2ff8cb0-05d8-483e-a5d8-abf9b3ccbea3\build3.exe"5⤵
- Executes dropped EXE
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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\60DE.exeC:\Users\Admin\AppData\Local\Temp\60DE.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 5442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 5482⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 5482⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 6762⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 7602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 8602⤵
- Program crash
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C:\Windows\SysWOW64\Wbem\wmic.exewmic os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 13042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 12922⤵
- Program crash
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C:\Windows\SysWOW64\cmd.execmd /C "wmic path win32_VideoController get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic path win32_VideoController get name3⤵
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C:\Windows\SysWOW64\cmd.execmd /C "wmic cpu get name"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic cpu get name3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 1402⤵
- Program crash
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\644A.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\644A.dll2⤵
- Loads dropped DLL
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
- Accesses Microsoft Outlook profiles
- outlook_office_path
- outlook_win_path
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4172 -ip 41721⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4172 -ip 41721⤵
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
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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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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
5A16.exe
5A16.exe
5A16.exe
5A16.exe
5A16.exe
5A16.exe
60DE.exe
60DE.exe
644A.dll
644A.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/1244-197-0x000000000087D000-0x00000000008A8000-memory.dmp
memory/1244-198-0x0000000000610000-0x000000000065A000-memory.dmp
memory/1964-206-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1964-182-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1964-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1964-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3056-172-0x0000000003040000-0x00000000030E9000-memory.dmp
memory/3056-167-0x0000000002F80000-0x000000000303D000-memory.dmp
memory/3056-161-0x0000000002BF0000-0x0000000002D1E000-memory.dmp
memory/3056-162-0x0000000002E50000-0x0000000002F79000-memory.dmp
memory/3056-174-0x0000000002E50000-0x0000000002F79000-memory.dmp
memory/3056-171-0x0000000003040000-0x00000000030E9000-memory.dmp
memory/3092-144-0x00000000021D0000-0x00000000022EB000-memory.dmp
memory/3092-142-0x000000000068A000-0x000000000071B000-memory.dmp
memory/3340-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3340-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3340-170-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3340-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3340-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3340-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3448-181-0x0000000001FDE000-0x000000000206F000-memory.dmp
memory/3472-157-0x0000000000AA0000-0x0000000000B15000-memory.dmp
memory/3472-158-0x0000000000A30000-0x0000000000A9B000-memory.dmp
memory/3472-159-0x0000000000A30000-0x0000000000A9B000-memory.dmp
memory/3584-156-0x00000000009E0000-0x00000000009EC000-memory.dmp
memory/3644-133-0x0000000000490000-0x0000000000499000-memory.dmp
memory/3644-134-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3644-132-0x00000000004BC000-0x00000000004CC000-memory.dmp
memory/3644-135-0x0000000000400000-0x0000000000448000-memory.dmp
memory/4172-165-0x0000000003060000-0x00000000034A7000-memory.dmp
memory/4172-204-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4172-205-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4172-166-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4932-195-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4932-199-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4932-207-0x0000000000400000-0x000000000045E000-memory.dmp