Analysis
- max time kernel
150s - max time network
138s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
05/10/2022, 09:01
General
- Target file.exe
- Size 272KB
- Sample221005-kywtaseadn
- SHA256 3fe0ece966c5e2ebfc4388b2454ed6278028065ef2acd3633f339240c54c4a98
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
-
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 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 14 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.
- 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\2877.exeC:\Users\Admin\AppData\Local\Temp\2877.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\2877.exeC:\Users\Admin\AppData\Local\Temp\2877.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\d6e41374-2877-4259-a22b-b5b5ae61cf7d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\2877.exe"C:\Users\Admin\AppData\Local\Temp\2877.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\2877.exe"C:\Users\Admin\AppData\Local\Temp\2877.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\build2.exe"C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\build2.exe"C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\build3.exe"C:\Users\Admin\AppData\Local\3dcfffab-1374-4af3-8ed0-38909946b35d\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\2E16.exeC:\Users\Admin\AppData\Local\Temp\2E16.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 5362⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 6762⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 7602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -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 3952 -s 13122⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 13042⤵
- 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 3952 -s 1402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\3068.exeC:\Users\Admin\AppData\Local\Temp\3068.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\3396.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\3396.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 412 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 3952 -ip 39521⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3952 -ip 39521⤵
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C:\Users\Admin\AppData\Local\Temp\B3C3.exeC:\Users\Admin\AppData\Local\Temp\B3C3.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\B829.exeC:\Users\Admin\AppData\Local\Temp\B829.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\C133.exeC:\Users\Admin\AppData\Local\Temp\C133.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\C3B5.exeC:\Users\Admin\AppData\Local\Temp\C3B5.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⤵
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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
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
2877.exe
2877.exe
2877.exe
2877.exe
2877.exe
2E16.exe
2E16.exe
3068.exe
3068.exe
3396.dll
3396.dll
B3C3.exe
B3C3.exe
B829.exe
B829.exe
C133.exe
C133.exe
C3B5.exe
C3B5.exe
2877.exe
mstsca.exe
mstsca.exe
memory/444-212-0x000000000078E000-0x00000000007BA000-memory.dmp
memory/444-213-0x0000000000610000-0x000000000065A000-memory.dmp
memory/812-269-0x0000000001010000-0x000000000101B000-memory.dmp
memory/812-282-0x0000000001020000-0x0000000001026000-memory.dmp
memory/812-268-0x0000000001020000-0x0000000001026000-memory.dmp
memory/984-187-0x000000000210D000-0x000000000219E000-memory.dmp
memory/1140-280-0x0000000000430000-0x0000000000452000-memory.dmp
memory/1140-262-0x0000000000430000-0x0000000000452000-memory.dmp
memory/1140-263-0x0000000000400000-0x0000000000427000-memory.dmp
memory/1512-161-0x0000000000170000-0x000000000017C000-memory.dmp
memory/1960-271-0x0000000000550000-0x0000000000557000-memory.dmp
memory/1960-272-0x0000000000540000-0x000000000054D000-memory.dmp
memory/1960-283-0x0000000000550000-0x0000000000557000-memory.dmp
memory/2248-256-0x0000000000730000-0x0000000000735000-memory.dmp
memory/2248-257-0x0000000000720000-0x0000000000729000-memory.dmp
memory/2248-278-0x0000000000730000-0x0000000000735000-memory.dmp
memory/2300-250-0x0000000000760000-0x0000000000767000-memory.dmp
memory/2300-251-0x0000000000750000-0x000000000075B000-memory.dmp
memory/2300-276-0x0000000000760000-0x0000000000767000-memory.dmp
memory/2312-162-0x00000000028C0000-0x0000000002A24000-memory.dmp
memory/2312-173-0x0000000002CA0000-0x0000000002D60000-memory.dmp
memory/2312-175-0x0000000002D70000-0x0000000002E1B000-memory.dmp
memory/2312-180-0x0000000002D70000-0x0000000002E1B000-memory.dmp
memory/2312-182-0x0000000002B60000-0x0000000002C84000-memory.dmp
memory/2312-163-0x0000000002B60000-0x0000000002C84000-memory.dmp
memory/2448-170-0x0000000000400000-0x0000000000449000-memory.dmp
memory/2448-169-0x0000000000400000-0x0000000000449000-memory.dmp
memory/2448-168-0x0000000001F40000-0x0000000001F49000-memory.dmp
memory/2448-167-0x0000000000450000-0x0000000000550000-memory.dmp
memory/3004-146-0x00000000020FF000-0x0000000002190000-memory.dmp
memory/3004-148-0x00000000022A0000-0x00000000023BB000-memory.dmp
memory/3188-134-0x0000000000400000-0x0000000000449000-memory.dmp
memory/3188-132-0x000000000066C000-0x000000000067C000-memory.dmp
memory/3188-135-0x0000000000400000-0x0000000000449000-memory.dmp
memory/3188-133-0x00000000005A0000-0x00000000005A9000-memory.dmp
memory/3916-164-0x00000000010F0000-0x000000000115B000-memory.dmp
memory/3916-158-0x0000000001160000-0x00000000011D5000-memory.dmp
memory/3916-159-0x00000000010F0000-0x000000000115B000-memory.dmp
memory/3952-174-0x0000000002FD0000-0x0000000003417000-memory.dmp
memory/3952-202-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/3952-176-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/4028-214-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4028-241-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4028-208-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4028-215-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4028-211-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4344-274-0x0000000001260000-0x0000000001268000-memory.dmp
memory/4344-284-0x0000000001260000-0x0000000001268000-memory.dmp
memory/4344-275-0x0000000001250000-0x000000000125B000-memory.dmp
memory/4388-259-0x0000000000750000-0x0000000000756000-memory.dmp
memory/4388-260-0x0000000000740000-0x000000000074C000-memory.dmp
memory/4388-279-0x0000000000750000-0x0000000000756000-memory.dmp
memory/4540-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4540-193-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4540-235-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4540-198-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4736-277-0x0000000000390000-0x0000000000399000-memory.dmp
memory/4736-254-0x0000000000380000-0x000000000038F000-memory.dmp
memory/4736-253-0x0000000000390000-0x0000000000399000-memory.dmp
memory/4984-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4984-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4984-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4984-178-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4984-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4984-171-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5000-281-0x0000000000860000-0x0000000000865000-memory.dmp
memory/5000-265-0x0000000000860000-0x0000000000865000-memory.dmp
memory/5000-266-0x0000000000850000-0x0000000000859000-memory.dmp