Analysis
- max time kernel
150s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
06/10/2022, 10:31
General
- Target file.exe
- Size 145KB
- Sample221006-mkc55shcgm
- SHA256 c3288ab71d0fd3f6f58f1170546afd475d0de8cdde2fba8b06db1ada7eb5d1f5
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 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 13 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 3 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 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.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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 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 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 24 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\C2D8.exeC:\Users\Admin\AppData\Local\Temp\C2D8.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\C2D8.exeC:\Users\Admin\AppData\Local\Temp\C2D8.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\25feaf74-f970-4d56-a7c1-0231c71b2ef8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\C2D8.exe"C:\Users\Admin\AppData\Local\Temp\C2D8.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\C2D8.exe"C:\Users\Admin\AppData\Local\Temp\C2D8.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\build2.exe"C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\build2.exe"C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\build3.exe"C:\Users\Admin\AppData\Local\3b665b6c-c158-45e4-b0af-0c15129c2329\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\C8B5.exeC:\Users\Admin\AppData\Local\Temp\C8B5.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 5362⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 6922⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 7602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 8762⤵
- 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 4584 -s 13042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 13682⤵
- 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⤵
- Suspicious use of AdjustPrivilegeToken
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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 4584 -s 1402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\CE92.exeC:\Users\Admin\AppData\Local\Temp\CE92.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\D2B9.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\D2B9.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 452 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4584 -ip 45841⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4584 -ip 45841⤵
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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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C:\Users\Admin\AppData\Local\Temp\4819.exeC:\Users\Admin\AppData\Local\Temp\4819.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\4DE6.exeC:\Users\Admin\AppData\Local\Temp\4DE6.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\5450.exeC:\Users\Admin\AppData\Local\Temp\5450.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
C2D8.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
4819.exe
4819.exe
4DE6.exe
4DE6.exe
5450.exe
5450.exe
C2D8.exe
C2D8.exe
C2D8.exe
C2D8.exe
C2D8.exe
C8B5.exe
C8B5.exe
CE92.exe
CE92.exe
D2B9.dll
D2B9.dll
mstsca.exe
mstsca.exe
memory/444-259-0x0000000000B40000-0x0000000000B4C000-memory.dmp
memory/444-258-0x0000000000B50000-0x0000000000B56000-memory.dmp
memory/852-161-0x0000000000E00000-0x0000000000E75000-memory.dmp
memory/852-162-0x0000000000B50000-0x0000000000BBB000-memory.dmp
memory/852-168-0x0000000000B50000-0x0000000000BBB000-memory.dmp
memory/888-274-0x0000000001010000-0x000000000101B000-memory.dmp
memory/888-273-0x0000000001020000-0x0000000001028000-memory.dmp
memory/888-282-0x0000000001020000-0x0000000001028000-memory.dmp
memory/980-213-0x0000000000400000-0x000000000045E000-memory.dmp
memory/980-214-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/980-238-0x0000000000400000-0x000000000045E000-memory.dmp
memory/980-211-0x0000000000400000-0x000000000045E000-memory.dmp
memory/980-207-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1388-135-0x0000000000400000-0x0000000000580000-memory.dmp
memory/1388-134-0x0000000000400000-0x0000000000580000-memory.dmp
memory/1388-132-0x000000000097D000-0x000000000098D000-memory.dmp
memory/1388-133-0x0000000000920000-0x0000000000929000-memory.dmp
memory/1772-261-0x0000000000F40000-0x0000000000F62000-memory.dmp
memory/1772-262-0x0000000000F10000-0x0000000000F37000-memory.dmp
memory/1772-278-0x0000000000F40000-0x0000000000F62000-memory.dmp
memory/1980-164-0x0000000000390000-0x000000000039C000-memory.dmp
memory/1988-210-0x000000000079D000-0x00000000007C8000-memory.dmp
memory/1988-212-0x0000000000700000-0x000000000074A000-memory.dmp
memory/2528-249-0x0000000000AD0000-0x0000000000AD7000-memory.dmp
memory/2528-275-0x0000000000AD0000-0x0000000000AD7000-memory.dmp
memory/2528-250-0x0000000000AC0000-0x0000000000ACB000-memory.dmp
memory/2664-277-0x00000000003B0000-0x00000000003B5000-memory.dmp
memory/2664-256-0x00000000003A0000-0x00000000003A9000-memory.dmp
memory/2664-255-0x00000000003B0000-0x00000000003B5000-memory.dmp
memory/2716-173-0x00000000032C0000-0x0000000003380000-memory.dmp
memory/2716-174-0x0000000003380000-0x000000000342C000-memory.dmp
memory/2716-181-0x00000000031B0000-0x00000000032B2000-memory.dmp
memory/2716-179-0x0000000003380000-0x000000000342C000-memory.dmp
memory/2716-167-0x00000000031B0000-0x00000000032B2000-memory.dmp
memory/2716-166-0x0000000002F70000-0x00000000030AA000-memory.dmp
memory/3504-160-0x0000000000400000-0x0000000000580000-memory.dmp
memory/3504-158-0x000000000063D000-0x000000000064D000-memory.dmp
memory/3504-169-0x0000000000400000-0x0000000000580000-memory.dmp
memory/3504-159-0x00000000005F0000-0x00000000005F9000-memory.dmp
memory/3684-191-0x00000000021BF000-0x0000000002250000-memory.dmp
memory/4176-267-0x00000000010A0000-0x00000000010A6000-memory.dmp
memory/4176-268-0x0000000001090000-0x000000000109B000-memory.dmp
memory/4176-280-0x00000000010A0000-0x00000000010A6000-memory.dmp
memory/4476-146-0x0000000002172000-0x0000000002203000-memory.dmp
memory/4476-148-0x0000000002250000-0x000000000236B000-memory.dmp
memory/4556-270-0x0000000000A20000-0x0000000000A27000-memory.dmp
memory/4556-271-0x0000000000A10000-0x0000000000A1D000-memory.dmp
memory/4556-281-0x0000000000A20000-0x0000000000A27000-memory.dmp
memory/4584-171-0x0000000002F60000-0x00000000033A7000-memory.dmp
memory/4584-198-0x0000000000400000-0x00000000008AE000-memory.dmp
memory/4584-172-0x0000000000400000-0x00000000008AE000-memory.dmp
memory/4588-264-0x0000000000B30000-0x0000000000B35000-memory.dmp
memory/4588-279-0x0000000000B30000-0x0000000000B35000-memory.dmp
memory/4588-265-0x0000000000B20000-0x0000000000B29000-memory.dmp
memory/4764-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4764-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4764-175-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4764-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4764-178-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4764-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5088-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5088-192-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5088-234-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5088-197-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5108-276-0x0000000000E90000-0x0000000000E99000-memory.dmp
memory/5108-253-0x0000000000E80000-0x0000000000E8F000-memory.dmp
memory/5108-252-0x0000000000E90000-0x0000000000E99000-memory.dmp