Analysis
- max time kernel
146s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
21/03/2023, 10:06
General
- Target BG000896543.exe
- Size 469KB
- Sample230321-l44a1ahf83
- SHA256 1fcf39f27164b5bfee7f234220f5cd10f73932d72794cafd678a0dac1297707f
Malware Config
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 2 IoCs
- Executes dropped EXE 2 IoCs
- UPX packed file 4 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\BG000896543.exe"C:\Users\Admin\AppData\Local\Temp\BG000896543.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\jmxpydzgw.exe"C:\Users\Admin\AppData\Local\Temp\jmxpydzgw.exe" C:\Users\Admin\AppData\Local\Temp\edfxh.uno2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\jmxpydzgw.exe"C:\Users\Admin\AppData\Local\Temp\jmxpydzgw.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
edfxh.uno
grfmfvqbxa.zsd
jmxpydzgw.exe
jmxpydzgw.exe
jmxpydzgw.exe
memory/2608-150-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-152-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-146-0x0000000000400000-0x0000000000426000-memory.dmp
memory/2608-148-0x0000000000400000-0x0000000000426000-memory.dmp
memory/2608-149-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-142-0x0000000000400000-0x0000000000426000-memory.dmp
memory/2608-151-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-145-0x0000000000400000-0x0000000000426000-memory.dmp
memory/2608-153-0x0000000004D60000-0x0000000004DFC000-memory.dmp
memory/2608-154-0x0000000004E00000-0x00000000053A4000-memory.dmp
memory/2608-155-0x00000000053B0000-0x0000000005416000-memory.dmp
memory/2608-157-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-158-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-159-0x0000000004B10000-0x0000000004B20000-memory.dmp
memory/2608-160-0x0000000004B10000-0x0000000004B20000-memory.dmp