Analysis
- max time kernel
146s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
09/07/2023, 08:13
General
- Target Halkbankpdfexeexeexeexeex.exe
- Size 322KB
- Sample230709-j4ftlacc4w
- SHA256 d4bb1c789100f6305c61e2be96351d53f20c091fa032948fcece3f73a29e0861
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 3 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 38 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Halkbankpdfexeexeexeexeex.exe"C:\Users\Admin\AppData\Local\Temp\Halkbankpdfexeexeexeexeex.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Halkbankpdfexeexeexeexeex.exe"C:\Users\Admin\AppData\Local\Temp\Halkbankpdfexeexeexeexeex.exe"2⤵
- Checks QEMU agent file
- Checks computer location settings
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/4628-146-0x0000000002C60000-0x00000000057C8000-memory.dmp
memory/4628-147-0x0000000002C60000-0x00000000057C8000-memory.dmp
memory/4900-148-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4900-149-0x0000000001660000-0x00000000041C8000-memory.dmp
memory/4900-150-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4900-151-0x0000000001660000-0x00000000041C8000-memory.dmp
memory/4900-152-0x0000000001660000-0x00000000041C8000-memory.dmp
memory/4900-153-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4900-154-0x0000000034610000-0x000000003495A000-memory.dmp