Analysis
- max time kernel
112s - max time network
119s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
25/08/2024, 23:55
General
- Target dc4bd1181101020fd2ff4166cff71150N.exe
- Size 189KB
- Sample240825-3yn3kavalr
- SHA256 c335cbc3132d00a63631e6095d2b3ed5f5749bab42ff003cf37aa935b1c3d7c0
Malware Config
Extracted
-
quasar
-
1.3.0.0
-
Office04
-
194.5.98.184:4782
-
QSR_MUTEX_xMuIJeean9m7DEiqoC
-
encryption_key
oOv05Asoqc3wbGQwDwwC
-
install_name
venom.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
venom
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\dc4bd1181101020fd2ff4166cff71150N.exe"C:\Users\Admin\AppData\Local\Temp\dc4bd1181101020fd2ff4166cff71150N.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\savon.exe"C:\Users\Admin\AppData\Local\Temp\savon.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\venom\venom.exe"C:\Users\Admin\AppData\Roaming\venom\venom.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
savon.exe
memory/440-34-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/440-38-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/440-37-0x0000000006C80000-0x0000000006C8A000-memory.dmp
memory/4384-1-0x0000000000170000-0x00000000001A6000-memory.dmp
memory/4384-2-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp
memory/4384-3-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp
memory/4384-4-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp
memory/4384-7-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp
memory/4384-19-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp
memory/4384-0-0x00007FFACED13000-0x00007FFACED15000-memory.dmp
memory/4400-22-0x0000000005C40000-0x00000000061E4000-memory.dmp
memory/4400-24-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/4400-25-0x0000000005880000-0x00000000058E6000-memory.dmp
memory/4400-26-0x00000000064A0000-0x00000000064B2000-memory.dmp
memory/4400-27-0x00000000069E0000-0x0000000006A1C000-memory.dmp
memory/4400-35-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/4400-23-0x00000000057E0000-0x0000000005872000-memory.dmp
memory/4400-21-0x0000000000D30000-0x0000000000D8E000-memory.dmp
memory/4400-20-0x0000000074B8E000-0x0000000074B8F000-memory.dmp