Analysis
- max time kernel
141s - max time network
135s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
13/11/2024, 02:37
General
- Target c5f307b4f92de8f2098c8da83d61a7ec4c42a6a0aa7d22379849b109f8bf2db9.exe
- Size 50KB
- Sample241113-c4kdfstraw
- SHA256 c5f307b4f92de8f2098c8da83d61a7ec4c42a6a0aa7d22379849b109f8bf2db9
Malware Config
Signatures
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
- UPX packed file 8 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\c5f307b4f92de8f2098c8da83d61a7ec4c42a6a0aa7d22379849b109f8bf2db9.exe"C:\Users\Admin\AppData\Local\Temp\c5f307b4f92de8f2098c8da83d61a7ec4c42a6a0aa7d22379849b109f8bf2db9.exe"1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\C5F307~1.EXE > nul2⤵
- System Location Discovery: System Language Discovery
-
-
C:\Windows\Debug\bqchost.exeC:\Windows\Debug\bqchost.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
bqchost.exe
memory/1888-0-0x0000000010000000-0x000000001000E000-memory.dmp
memory/1888-3-0x0000000010000000-0x000000001000E000-memory.dmp
memory/1888-13-0x0000000010000000-0x000000001000E000-memory.dmp
memory/4192-11-0x0000000010000000-0x000000001000E000-memory.dmp
memory/4192-12-0x0000000010000000-0x000000001000E000-memory.dmp
memory/4192-15-0x0000000010000000-0x000000001000E000-memory.dmp
memory/4192-17-0x0000000010000000-0x000000001000E000-memory.dmp
memory/4192-18-0x0000000010000000-0x000000001000E000-memory.dmp