Analysis
- max time kernel
150s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
07/10/2022, 08:03
General
- Target file.exe
- Size 266KB
- Sample221007-jxpg6acbcp
- SHA256 44dc53fbf47e1ca612ce2a85f429c062f5040eee43323740733ca935839356a4
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 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\C911.exeC:\Users\Admin\AppData\Local\Temp\C911.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\C911.exeC:\Users\Admin\AppData\Local\Temp\C911.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\53596bdd-0112-418d-a34f-a8e0b059c4e6" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\C911.exe"C:\Users\Admin\AppData\Local\Temp\C911.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\C911.exe"C:\Users\Admin\AppData\Local\Temp\C911.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\build2.exe"C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\build2.exe"C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
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C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\build3.exe"C:\Users\Admin\AppData\Local\e96c8336-50db-4b86-9fc4-23b8f13aa43a\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\CE62.exeC:\Users\Admin\AppData\Local\Temp\CE62.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 5602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 5642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 5642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 7202⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 8042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 8842⤵
- 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 844 -s 13282⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 13162⤵
- 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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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 1402⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\D18F.exeC:\Users\Admin\AppData\Local\Temp\D18F.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\D588.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\D588.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 404 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 844 -ip 8441⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 844 -ip 8441⤵
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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\578A.exeC:\Users\Admin\AppData\Local\Temp\578A.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\6249.exeC:\Users\Admin\AppData\Local\Temp\6249.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\69CC.exeC:\Users\Admin\AppData\Local\Temp\69CC.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
C911.exe
578A.exe
578A.exe
6249.exe
6249.exe
69CC.exe
69CC.exe
C911.exe
C911.exe
C911.exe
C911.exe
C911.exe
CE62.exe
CE62.exe
D18F.exe
D18F.exe
D588.dll
D588.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
mstsca.exe
mstsca.exe
memory/808-159-0x00000000021E0000-0x00000000022FB000-memory.dmp
memory/808-156-0x000000000214E000-0x00000000021DF000-memory.dmp
memory/844-232-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/844-190-0x0000000003050000-0x0000000003497000-memory.dmp
memory/844-191-0x0000000000400000-0x00000000008D0000-memory.dmp
memory/960-276-0x0000000000EA0000-0x0000000000EA5000-memory.dmp
memory/960-254-0x0000000000EA0000-0x0000000000EA5000-memory.dmp
memory/960-255-0x0000000000E90000-0x0000000000E99000-memory.dmp
memory/1064-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1064-161-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1064-157-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1064-178-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1064-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1224-280-0x00000000013B0000-0x00000000013B6000-memory.dmp
memory/1224-266-0x00000000013B0000-0x00000000013B6000-memory.dmp
memory/1224-267-0x0000000000F60000-0x0000000000F6B000-memory.dmp
memory/1796-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1796-182-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1796-184-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1796-236-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2188-183-0x000000000213D000-0x00000000021CE000-memory.dmp
memory/3064-269-0x0000000000FF0000-0x0000000000FF7000-memory.dmp
memory/3064-281-0x0000000000FF0000-0x0000000000FF7000-memory.dmp
memory/3064-270-0x0000000000FE0000-0x0000000000FED000-memory.dmp
memory/3204-203-0x000000000072D000-0x0000000000758000-memory.dmp
memory/3204-205-0x00000000020F0000-0x000000000213A000-memory.dmp
memory/3428-275-0x00000000010E0000-0x00000000010E9000-memory.dmp
memory/3428-252-0x00000000010D0000-0x00000000010DF000-memory.dmp
memory/3428-251-0x00000000010E0000-0x00000000010E9000-memory.dmp
memory/3440-135-0x0000000000400000-0x0000000000447000-memory.dmp
memory/3440-134-0x0000000000400000-0x0000000000447000-memory.dmp
memory/3440-133-0x00000000005C0000-0x00000000005C9000-memory.dmp
memory/3440-132-0x00000000004CD000-0x00000000004DE000-memory.dmp
memory/3520-260-0x00000000004C0000-0x00000000004E2000-memory.dmp
memory/3520-261-0x0000000000490000-0x00000000004B7000-memory.dmp
memory/3520-278-0x00000000004C0000-0x00000000004E2000-memory.dmp
memory/3560-155-0x0000000000A00000-0x0000000000A6B000-memory.dmp
memory/3560-164-0x0000000000A00000-0x0000000000A6B000-memory.dmp
memory/3560-152-0x0000000000A70000-0x0000000000AE5000-memory.dmp
memory/4048-204-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4048-200-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4048-212-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4048-237-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4048-207-0x0000000000400000-0x000000000045E000-memory.dmp
memory/4068-160-0x0000000000690000-0x000000000069C000-memory.dmp
memory/4360-163-0x0000000002F30000-0x0000000003070000-memory.dmp
memory/4360-174-0x0000000002F30000-0x0000000003070000-memory.dmp
memory/4360-170-0x0000000003070000-0x0000000003131000-memory.dmp
memory/4360-162-0x0000000002C60000-0x0000000002DE5000-memory.dmp
memory/4360-171-0x0000000003140000-0x00000000031ED000-memory.dmp
memory/4876-273-0x0000000000C30000-0x0000000000C3B000-memory.dmp
memory/4876-282-0x0000000000C40000-0x0000000000C48000-memory.dmp
memory/4876-272-0x0000000000C40000-0x0000000000C48000-memory.dmp
memory/4940-249-0x00000000005E0000-0x00000000005EB000-memory.dmp
memory/4940-274-0x00000000005F0000-0x00000000005F7000-memory.dmp
memory/4940-248-0x00000000005F0000-0x00000000005F7000-memory.dmp
memory/5000-264-0x0000000000E80000-0x0000000000E89000-memory.dmp
memory/5000-263-0x0000000000E90000-0x0000000000E95000-memory.dmp
memory/5000-279-0x0000000000E90000-0x0000000000E95000-memory.dmp
memory/5008-167-0x0000000000400000-0x0000000000448000-memory.dmp
memory/5008-169-0x0000000000400000-0x0000000000448000-memory.dmp
memory/5008-166-0x00000000005C0000-0x00000000005C9000-memory.dmp
memory/5008-165-0x00000000004DD000-0x00000000004ED000-memory.dmp
memory/5104-277-0x0000000000110000-0x0000000000116000-memory.dmp
memory/5104-258-0x0000000000100000-0x000000000010C000-memory.dmp
memory/5104-257-0x0000000000110000-0x0000000000116000-memory.dmp