Analysis
- max time kernel
51s - max time network
61s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
02/06/2024, 02:14
General
- Target Viber.exe
- Size 3.3MB
- Sample240602-cn2b2afh82
- SHA256 2ab4ac728381ffef7b917c6e2f9fd45cdbb753238552484b33990d101f90105d
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.100.4:4782
-
ff281bf3-1641-40e1-b845-186b77f35b47
-
encryption_key
F8B799D52937CC435CCEC057E69F8914153CFD83
-
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 3 IoCs
- Executes dropped EXE 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Viber.exe"C:\Users\Admin\AppData\Local\Temp\Viber.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\explorer.exe"C:\Windows\explorer.exe"1⤵
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
Client.exe
memory/2620-8-0x00000000002A0000-0x00000000005FA000-memory.dmp
memory/2620-11-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp
memory/2620-10-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp
memory/2620-12-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp
memory/2620-13-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp
memory/2940-0-0x000007FEF5D73000-0x000007FEF5D74000-memory.dmp
memory/2940-1-0x0000000000250000-0x00000000005AA000-memory.dmp
memory/2940-2-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp
memory/2940-9-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp