Analysis
- max time kernel
151s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/10/2022, 00:02
General
- Target file.exe
- Size 265KB
- Sample221005-abf48achf2
- SHA256 d72cbff142e1645e2ed5b786655a029cd6935d816ad75242c6db5584da0d2011
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
-
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 12 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 4 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 4 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 38 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\25F7.exeC:\Users\Admin\AppData\Local\Temp\25F7.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\25F7.exeC:\Users\Admin\AppData\Local\Temp\25F7.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\d8bed9ec-117f-4493-83b0-5fa405a8acbd" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\25F7.exe"C:\Users\Admin\AppData\Local\Temp\25F7.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\25F7.exe"C:\Users\Admin\AppData\Local\Temp\25F7.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\build2.exe"C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\build2.exe"C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
-
-
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C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\build3.exe"C:\Users\Admin\AppData\Local\e3df0788-0adb-4c4c-a62e-19b93df7f795\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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C:\Users\Admin\AppData\Local\Temp\2BC4.exeC:\Users\Admin\AppData\Local\Temp\2BC4.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3416 -s 5362⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3416 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3416 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3416 -s 6122⤵
- Program crash
-
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\2F11.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\2F11.dll2⤵
- Loads dropped DLL
-
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C:\Users\Admin\AppData\Local\Temp\30F6.exeC:\Users\Admin\AppData\Local\Temp\30F6.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
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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 404 -p 3416 -ip 34161⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3416 -ip 34161⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3416 -ip 34161⤵
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C:\Users\Admin\AppData\Local\Temp\AC13.exeC:\Users\Admin\AppData\Local\Temp\AC13.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\B088.exeC:\Users\Admin\AppData\Local\Temp\B088.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\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3416 -ip 34161⤵
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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
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Downloads
mozglue.dll
nss3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
25F7.exe
25F7.exe
25F7.exe
25F7.exe
25F7.exe
2BC4.exe
2BC4.exe
2F11.dll
2F11.dll
2F11.dll
30F6.exe
30F6.exe
AC13.exe
AC13.exe
B088.exe
B088.exe
25F7.exe
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/320-246-0x0000000001270000-0x0000000001275000-memory.dmp
memory/320-247-0x0000000001260000-0x0000000001269000-memory.dmp
memory/320-268-0x0000000001270000-0x0000000001275000-memory.dmp
memory/664-167-0x0000000000EB0000-0x0000000000F1B000-memory.dmp
memory/664-162-0x0000000000EB0000-0x0000000000F1B000-memory.dmp
memory/664-161-0x0000000000F20000-0x0000000000F95000-memory.dmp
memory/1028-272-0x0000000001000000-0x0000000001007000-memory.dmp
memory/1028-261-0x0000000001000000-0x0000000001007000-memory.dmp
memory/1028-262-0x0000000000DF0000-0x0000000000DFD000-memory.dmp
memory/1424-267-0x00000000005B0000-0x00000000005B9000-memory.dmp
memory/1424-243-0x00000000005B0000-0x00000000005B9000-memory.dmp
memory/1424-244-0x00000000005A0000-0x00000000005AF000-memory.dmp
memory/1464-188-0x000000000212B000-0x00000000021BC000-memory.dmp
memory/1512-253-0x0000000000990000-0x00000000009B7000-memory.dmp
memory/1512-252-0x00000000009C0000-0x00000000009E2000-memory.dmp
memory/1512-269-0x00000000009C0000-0x00000000009E2000-memory.dmp
memory/1776-169-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1776-164-0x00000000006EB000-0x00000000006FC000-memory.dmp
memory/1776-166-0x0000000000400000-0x0000000000448000-memory.dmp
memory/1776-165-0x0000000000550000-0x0000000000559000-memory.dmp
memory/2304-202-0x000000000068D000-0x00000000006B8000-memory.dmp
memory/2304-204-0x0000000002090000-0x00000000020DA000-memory.dmp
memory/2384-240-0x00000000009A0000-0x00000000009A7000-memory.dmp
memory/2384-241-0x0000000000990000-0x000000000099B000-memory.dmp
memory/2384-266-0x00000000009A0000-0x00000000009A7000-memory.dmp
memory/2452-163-0x00000000003E0000-0x00000000003EC000-memory.dmp
memory/3112-199-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3112-203-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3112-239-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3112-205-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3112-210-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/3244-179-0x0000000003240000-0x00000000032FD000-memory.dmp
memory/3244-181-0x0000000003310000-0x00000000033B9000-memory.dmp
memory/3244-170-0x0000000002EB0000-0x0000000002FDE000-memory.dmp
memory/3244-180-0x0000000003310000-0x00000000033B9000-memory.dmp
memory/3244-183-0x0000000003110000-0x0000000003239000-memory.dmp
memory/3244-158-0x0000000002760000-0x000000000292A000-memory.dmp
memory/3244-171-0x0000000003110000-0x0000000003239000-memory.dmp
memory/3416-230-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/3416-174-0x0000000002F50000-0x0000000003397000-memory.dmp
memory/3416-175-0x0000000000400000-0x00000000008BC000-memory.dmp
memory/3476-270-0x0000000000330000-0x0000000000335000-memory.dmp
memory/3476-255-0x0000000000330000-0x0000000000335000-memory.dmp
memory/3476-256-0x0000000000320000-0x0000000000329000-memory.dmp
memory/4072-152-0x00000000021A1000-0x0000000002232000-memory.dmp
memory/4072-154-0x0000000002240000-0x000000000235B000-memory.dmp
memory/4352-264-0x0000000000C70000-0x0000000000C78000-memory.dmp
memory/4352-265-0x0000000000C60000-0x0000000000C6B000-memory.dmp
memory/4352-273-0x0000000000C70000-0x0000000000C78000-memory.dmp
memory/4448-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4448-187-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4448-231-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4448-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-172-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-178-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4560-160-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4980-132-0x00000000005EC000-0x00000000005FC000-memory.dmp
memory/4980-135-0x0000000000400000-0x0000000000448000-memory.dmp
memory/4980-133-0x00000000005A0000-0x00000000005A9000-memory.dmp
memory/4980-134-0x0000000000400000-0x0000000000448000-memory.dmp
memory/5056-259-0x0000000000400000-0x000000000040B000-memory.dmp
memory/5056-271-0x0000000000410000-0x0000000000416000-memory.dmp
memory/5056-258-0x0000000000410000-0x0000000000416000-memory.dmp
memory/5080-250-0x0000000000B80000-0x0000000000B8C000-memory.dmp
memory/5080-249-0x0000000000B90000-0x0000000000B96000-memory.dmp