Analysis
- max time kernel
151s - max time network
137s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
07/10/2022, 07:35
General
- Target file.exe
- Size 266KB
- Sample221007-jensxacbap
- SHA256 be0729c80b5e015b49c122e855cfd4cc984b2f690c50606f310f1fe15d60c1f3
Malware Config
Extracted
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djvu
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http://winnlinne.com/lancer/get.php
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extension
.towz
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offline_id
SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1
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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
-
54.9
-
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 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 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 4 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.
- Modifies system certificate store 2 TTPs 3 IoCs
- 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\F169.exeC:\Users\Admin\AppData\Local\Temp\F169.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\F169.exeC:\Users\Admin\AppData\Local\Temp\F169.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\947deb67-e267-4c90-ac77-b02d42bcfa36" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\F169.exe"C:\Users\Admin\AppData\Local\Temp\F169.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\F169.exe"C:\Users\Admin\AppData\Local\Temp\F169.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\build2.exe"C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\build2.exe"C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
-
-
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C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\build3.exe"C:\Users\Admin\AppData\Local\394b4fe8-4708-406d-b538-d2163686b2bc\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\F746.exeC:\Users\Admin\AppData\Local\Temp\F746.exe1⤵
- Executes dropped EXE
- Modifies system certificate store
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 5602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 5642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 5642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 6522⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 6922⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 6802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 9042⤵
- 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 3436 -s 13482⤵
- Program crash
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C:\Windows\SysWOW64\cmd.execmd /C "wmic path win32_VideoController get name"2⤵
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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⤵
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C:\Windows\SysWOW64\Wbem\WMIC.exewmic cpu get name3⤵
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 1402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\F9F7.exeC:\Users\Admin\AppData\Local\Temp\F9F7.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\FDE0.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\FDE0.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 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3436 -ip 34361⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3436 -ip 34361⤵
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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\7E5C.exeC:\Users\Admin\AppData\Local\Temp\7E5C.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\87A4.exeC:\Users\Admin\AppData\Local\Temp\87A4.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\8D71.exeC:\Users\Admin\AppData\Local\Temp\8D71.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
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
F169.exe
7E5C.exe
7E5C.exe
87A4.exe
87A4.exe
8D71.exe
8D71.exe
F169.exe
F169.exe
F169.exe
F169.exe
F169.exe
F746.exe
F746.exe
F9F7.exe
F9F7.exe
FDE0.dll
FDE0.dll
mstsca.exe
mstsca.exe
memory/1120-260-0x0000000000ED0000-0x0000000000EF2000-memory.dmp
memory/1120-278-0x0000000000ED0000-0x0000000000EF2000-memory.dmp
memory/1120-261-0x0000000000EA0000-0x0000000000EC7000-memory.dmp
memory/1268-132-0x000000000058D000-0x000000000059E000-memory.dmp
memory/1268-133-0x00000000004C0000-0x00000000004C9000-memory.dmp
memory/1268-134-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1268-135-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1476-269-0x00000000003F0000-0x00000000003F7000-memory.dmp
memory/1476-270-0x00000000003E0000-0x00000000003ED000-memory.dmp
memory/1476-281-0x00000000003F0000-0x00000000003F7000-memory.dmp
memory/1508-197-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1508-205-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1508-200-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1508-194-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1508-237-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1780-161-0x0000000000D20000-0x0000000000D2C000-memory.dmp
memory/1920-279-0x0000000000E80000-0x0000000000E85000-memory.dmp
memory/1920-264-0x0000000000E70000-0x0000000000E79000-memory.dmp
memory/1920-263-0x0000000000E80000-0x0000000000E85000-memory.dmp
memory/2132-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2132-177-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2132-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2132-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2132-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3156-272-0x0000000000FE0000-0x0000000000FE8000-memory.dmp
memory/3156-273-0x0000000000FD0000-0x0000000000FDB000-memory.dmp
memory/3156-282-0x0000000000FE0000-0x0000000000FE8000-memory.dmp
memory/3264-167-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3264-166-0x0000000000590000-0x0000000000599000-memory.dmp
memory/3264-169-0x0000000000400000-0x0000000000448000-memory.dmp
memory/3264-165-0x000000000081D000-0x000000000082D000-memory.dmp
memory/3436-225-0x0000000003040000-0x0000000003487000-memory.dmp
memory/3436-233-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/3436-226-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/3592-154-0x0000000002040000-0x00000000020D1000-memory.dmp
memory/3592-156-0x00000000021F0000-0x000000000230B000-memory.dmp
memory/3596-254-0x0000000000FB0000-0x0000000000FB5000-memory.dmp
memory/3596-255-0x0000000000FA0000-0x0000000000FA9000-memory.dmp
memory/3596-276-0x0000000000FB0000-0x0000000000FB5000-memory.dmp
memory/3912-182-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3912-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3912-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3912-232-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4440-275-0x0000000000D60000-0x0000000000D69000-memory.dmp
memory/4440-251-0x0000000000D60000-0x0000000000D69000-memory.dmp
memory/4440-252-0x0000000000D50000-0x0000000000D5F000-memory.dmp
memory/4468-164-0x0000000000E10000-0x0000000000E7B000-memory.dmp
memory/4468-160-0x0000000000E10000-0x0000000000E7B000-memory.dmp
memory/4468-159-0x0000000000E80000-0x0000000000EF5000-memory.dmp
memory/4484-267-0x0000000000F40000-0x0000000000F4B000-memory.dmp
memory/4484-266-0x0000000000F50000-0x0000000000F56000-memory.dmp
memory/4484-280-0x0000000000F50000-0x0000000000F56000-memory.dmp
memory/4588-199-0x0000000000610000-0x000000000065A000-memory.dmp
memory/4588-198-0x000000000074D000-0x0000000000778000-memory.dmp
memory/4764-249-0x0000000001100000-0x000000000110B000-memory.dmp
memory/4764-274-0x0000000001110000-0x0000000001117000-memory.dmp
memory/4764-248-0x0000000001110000-0x0000000001117000-memory.dmp
memory/4768-183-0x0000000002145000-0x00000000021D6000-memory.dmp
memory/4776-258-0x00000000005F0000-0x00000000005FC000-memory.dmp
memory/4776-257-0x0000000000800000-0x0000000000806000-memory.dmp
memory/4776-277-0x0000000000800000-0x0000000000806000-memory.dmp
memory/4880-162-0x0000000003050000-0x00000000031D5000-memory.dmp
memory/4880-163-0x0000000003320000-0x0000000003460000-memory.dmp
memory/4880-170-0x0000000003470000-0x0000000003531000-memory.dmp
memory/4880-171-0x0000000003550000-0x00000000035FD000-memory.dmp
memory/4880-174-0x0000000003320000-0x0000000003460000-memory.dmp