Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
07/01/2023, 00:47
General
- Target 05c2991a5ea29caa99dbf224aaf1cd4b5d3d88430118c6fd4d18d73130c54433.exe
- Size 7.6MB
- Sample230107-a5brlacd34
- SHA256 05c2991a5ea29caa99dbf224aaf1cd4b5d3d88430118c6fd4d18d73130c54433
Malware Config
Extracted
-
blackguard
-
http://45.15.156.9
Signatures
- BlackGuard
Infostealer first seen in Late 2021.
- Executes dropped EXE 2 IoCs
- Modifies Windows Firewall 1 TTPs 1 IoCs
- Sets DLL path for service in the registry 2 TTPs 1 IoCs
- Sets file execution options in registry 2 TTPs 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Modifies WinLogon 2 TTPs 1 IoCs
- Drops file in System32 directory 1 IoCs
- Drops file in Program Files directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious behavior: LoadsDriver 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\05c2991a5ea29caa99dbf224aaf1cd4b5d3d88430118c6fd4d18d73130c54433.exe"C:\Users\Admin\AppData\Local\Temp\05c2991a5ea29caa99dbf224aaf1cd4b5d3d88430118c6fd4d18d73130c54433.exe"1⤵
- Sets file execution options in registry
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
-
C:\Users\Admin\AppData\Local\Temp\Inst.exe"C:\Users\Admin\AppData\Local\Temp\Inst.exe" x -pBlackTeam000111000111!2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\check.exe"C:\Users\Admin\AppData\Local\Temp\check.exe" -i3⤵
- Executes dropped EXE
- Sets DLL path for service in the registry
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\netsh.exenetsh advfirewall firewall add rule name="Remote Desktop" dir=in protocol=tcp localport=3389 profile=any action=allow4⤵
- Modifies Windows Firewall
-
-
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -s TermService1⤵
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -s TermService1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
rdpwrap.dll
Inst.exe
Inst.exe
check.exe
check.exe
rdpwrap.ini
SQLite.Interop.dll
rdpwrap.dll
rdpwrap.ini
memory/4088-138-0x000002ADE33D0000-0x000002ADE3446000-memory.dmp
memory/4088-134-0x00007FF8C99B0000-0x00007FF8CA471000-memory.dmp
memory/4088-143-0x000002ADE20D0000-0x000002ADE210A000-memory.dmp
memory/4088-144-0x00007FF8E8690000-0x00007FF8E8885000-memory.dmp
memory/4088-141-0x000002ADC96A0000-0x000002ADC96BE000-memory.dmp
memory/4088-140-0x00007FF8E8690000-0x00007FF8E8885000-memory.dmp
memory/4088-139-0x000002ADE3CA0000-0x000002ADE41C8000-memory.dmp
memory/4088-133-0x00007FF8C99B0000-0x00007FF8CA471000-memory.dmp
memory/4088-132-0x000002ADC7180000-0x000002ADC7918000-memory.dmp
memory/4088-137-0x000002ADC9650000-0x000002ADC96A0000-memory.dmp
memory/4088-136-0x000002ADE35A0000-0x000002ADE3762000-memory.dmp
memory/4088-135-0x00007FF8E8690000-0x00007FF8E8885000-memory.dmp