Analysis
- max time kernel
150s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/10/2022, 18:01
General
- Target file.exe
- Size 272KB
- Sample221005-wlwhjsfchk
- SHA256 160c9eb3600d3bf9d2846a09a65218593c5d385b724da7cd44b23a1732157cda
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
-
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 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.
- 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.
- 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\CE80.exeC:\Users\Admin\AppData\Local\Temp\CE80.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\CE80.exeC:\Users\Admin\AppData\Local\Temp\CE80.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\65571959-485e-4d50-bf36-ffba7e620124" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\CE80.exe"C:\Users\Admin\AppData\Local\Temp\CE80.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\CE80.exe"C:\Users\Admin\AppData\Local\Temp\CE80.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\build2.exe"C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
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C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\build2.exe"C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\build3.exe"C:\Users\Admin\AppData\Local\df580320-3294-43ac-94eb-c0ebd96b7703\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\D42E.exeC:\Users\Admin\AppData\Local\Temp\D42E.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 5402⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 5442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 5442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 6802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 6722⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 8642⤵
- 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 4240 -s 13642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4240 -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 4240 -s 1402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\D6BF.exeC:\Users\Admin\AppData\Local\Temp\D6BF.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\D9DD.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\D9DD.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 420 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4240 -ip 42401⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4240 -ip 42401⤵
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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\5F2B.exeC:\Users\Admin\AppData\Local\Temp\5F2B.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\65A4.exeC:\Users\Admin\AppData\Local\Temp\65A4.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\7267.exeC:\Users\Admin\AppData\Local\Temp\7267.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
CE80.exe
5F2B.exe
5F2B.exe
65A4.exe
65A4.exe
7267.exe
7267.exe
CE80.exe
CE80.exe
CE80.exe
CE80.exe
CE80.exe
D42E.exe
D42E.exe
D6BF.exe
D6BF.exe
D9DD.dll
D9DD.dll
D9DD.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/640-170-0x0000000000400000-0x000000000044A000-memory.dmp
memory/640-167-0x00000000005BF000-0x00000000005CF000-memory.dmp
memory/640-169-0x0000000001F40000-0x0000000001F49000-memory.dmp
memory/640-171-0x0000000000400000-0x000000000044A000-memory.dmp
memory/1176-192-0x000000000214F000-0x00000000021E0000-memory.dmp
memory/1376-278-0x0000000000120000-0x0000000000125000-memory.dmp
memory/1376-256-0x0000000000120000-0x0000000000125000-memory.dmp
memory/1376-257-0x0000000000110000-0x0000000000119000-memory.dmp
memory/1504-274-0x0000000000920000-0x0000000000928000-memory.dmp
memory/1504-275-0x0000000000910000-0x000000000091B000-memory.dmp
memory/1504-284-0x0000000000920000-0x0000000000928000-memory.dmp
memory/1552-215-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1552-214-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1552-208-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1552-239-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1552-212-0x0000000000400000-0x000000000045E000-memory.dmp
memory/1800-268-0x00000000008A0000-0x00000000008A6000-memory.dmp
memory/1800-269-0x0000000000890000-0x000000000089B000-memory.dmp
memory/1800-282-0x00000000008A0000-0x00000000008A6000-memory.dmp
memory/2380-279-0x0000000000DE0000-0x0000000000DE6000-memory.dmp
memory/2380-260-0x0000000000DD0000-0x0000000000DDC000-memory.dmp
memory/2380-259-0x0000000000DE0000-0x0000000000DE6000-memory.dmp
memory/2484-153-0x000000000200A000-0x000000000209B000-memory.dmp
memory/2484-158-0x00000000021E0000-0x00000000022FB000-memory.dmp
memory/2652-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2652-238-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2652-193-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2652-194-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2688-166-0x0000000000D80000-0x0000000000DEB000-memory.dmp
memory/2688-161-0x0000000001000000-0x0000000001075000-memory.dmp
memory/2688-163-0x0000000000D80000-0x0000000000DEB000-memory.dmp
memory/2892-211-0x00000000006ED000-0x0000000000719000-memory.dmp
memory/2892-213-0x00000000021D0000-0x000000000221A000-memory.dmp
memory/3020-164-0x0000000002730000-0x000000000289E000-memory.dmp
memory/3020-179-0x0000000002BD0000-0x0000000002C7C000-memory.dmp
memory/3020-165-0x00000000029D0000-0x0000000002AFD000-memory.dmp
memory/3020-156-0x00000000021C0000-0x00000000023C2000-memory.dmp
memory/3020-173-0x0000000002B00000-0x0000000002BC2000-memory.dmp
memory/3020-182-0x00000000029D0000-0x0000000002AFD000-memory.dmp
memory/3132-265-0x00000000008E0000-0x00000000008E5000-memory.dmp
memory/3132-266-0x00000000008D0000-0x00000000008D9000-memory.dmp
memory/3132-281-0x00000000008E0000-0x00000000008E5000-memory.dmp
memory/3212-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3212-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3212-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3212-177-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3212-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3672-135-0x0000000000400000-0x000000000044A000-memory.dmp
memory/3672-134-0x0000000000400000-0x000000000044A000-memory.dmp
memory/3672-133-0x0000000002180000-0x0000000002189000-memory.dmp
memory/3672-132-0x00000000005CE000-0x00000000005DF000-memory.dmp
memory/3932-271-0x0000000000B50000-0x0000000000B57000-memory.dmp
memory/3932-283-0x0000000000B50000-0x0000000000B57000-memory.dmp
memory/3932-272-0x0000000000B40000-0x0000000000B4D000-memory.dmp
memory/4084-162-0x0000000000AE0000-0x0000000000AEC000-memory.dmp
memory/4092-277-0x0000000000380000-0x0000000000389000-memory.dmp
memory/4092-253-0x0000000000380000-0x0000000000389000-memory.dmp
memory/4092-254-0x0000000000370000-0x000000000037F000-memory.dmp
memory/4240-175-0x0000000000400000-0x00000000008AE000-memory.dmp
memory/4240-202-0x0000000000400000-0x00000000008AE000-memory.dmp
memory/4240-174-0x0000000002FC0000-0x0000000003407000-memory.dmp
memory/4952-280-0x00000000009B0000-0x00000000009D2000-memory.dmp
memory/4952-263-0x0000000000980000-0x00000000009A7000-memory.dmp
memory/4952-262-0x00000000009B0000-0x00000000009D2000-memory.dmp
memory/5080-276-0x0000000000990000-0x0000000000997000-memory.dmp
memory/5080-251-0x0000000000980000-0x000000000098B000-memory.dmp
memory/5080-250-0x0000000000990000-0x0000000000997000-memory.dmp