Analysis
- max time kernel
132s - max time network
136s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
21/02/2022, 22:53
General
- Target DHL_January 2020 at 14M_9B7290_PDF.vbs
- Size 1.0MB
- Sample220221-2vbgmabdb8
- SHA256 5c9f19d624fe41a825e77a1e2b3e0dd3a424d0372fbecf3867f84e9160bc23d3
Malware Config
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger Main Payload 1 IoCs
- Executes dropped EXE 2 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 42 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 6 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\DHL_January 2020 at 14M_9B7290_PDF.vbs"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
-
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1384-136-0x000000000115D000-0x0000000001160000-memory.dmp
memory/4084-140-0x0000000005072000-0x0000000005073000-memory.dmp
memory/4084-143-0x0000000005400000-0x0000000005492000-memory.dmp
memory/4084-150-0x0000000005077000-0x0000000005079000-memory.dmp
memory/4084-137-0x0000000000400000-0x0000000000496000-memory.dmp
memory/4084-138-0x0000000074C3E000-0x0000000074C3F000-memory.dmp
memory/4084-139-0x0000000005070000-0x0000000005071000-memory.dmp
memory/4084-149-0x0000000006D20000-0x0000000006DBC000-memory.dmp
memory/4084-141-0x0000000005073000-0x0000000005074000-memory.dmp
memory/4084-142-0x0000000005074000-0x0000000005075000-memory.dmp
memory/4084-148-0x0000000006BF0000-0x0000000006BFA000-memory.dmp
memory/4084-144-0x0000000005A50000-0x0000000005FF4000-memory.dmp
memory/4084-145-0x00000000062F0000-0x0000000006356000-memory.dmp
memory/4084-146-0x00000000756C5000-0x00000000756C6000-memory.dmp
memory/4084-147-0x0000000006C30000-0x0000000006C80000-memory.dmp
memory/4824-132-0x00000242086D0000-0x00000242086D4000-memory.dmp
memory/4824-131-0x0000024206020000-0x0000024206030000-memory.dmp
memory/4824-130-0x0000024205950000-0x0000024205960000-memory.dmp