Analysis
- max time kernel
145s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
18/03/2023, 00:07
General
- Target bK91.exe
- Size 348KB
- Sample230318-aemfeaae52
- SHA256 131b876752d63234d51e97f4558d1a35a8dcdc55794320e1426fd37691033c72
Malware Config
Extracted
-
quasar
-
1.3.0.0
-
Office04
-
0.tcp.sa.ngrok.io:14992
-
QSR_MUTEX_vvc4zswzxNM6wzpP6M
-
encryption_key
n59mRujhjsNoSWVQhDSE
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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 AdjustPrivilegeToken 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\bK91.exe"C:\Users\Admin\AppData\Local\Temp\bK91.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1504-133-0x0000000000AA0000-0x0000000000AFE000-memory.dmp
memory/1504-134-0x0000000005A70000-0x0000000006014000-memory.dmp
memory/1504-135-0x0000000005560000-0x00000000055F2000-memory.dmp
memory/1504-136-0x0000000005690000-0x00000000056A0000-memory.dmp
memory/1504-137-0x0000000005600000-0x0000000005666000-memory.dmp
memory/1504-138-0x0000000005A40000-0x0000000005A52000-memory.dmp
memory/1504-139-0x0000000006920000-0x000000000695C000-memory.dmp
memory/1504-140-0x0000000006C10000-0x0000000006C1A000-memory.dmp
memory/1504-141-0x0000000005690000-0x00000000056A0000-memory.dmp