Analysis
- max time kernel
147s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20240802-en - resource tags
- submitted
05/08/2024, 13:37
General
- Target AV FIXER.exe
- Size 3.1MB
- Sample240805-qw7exa1fle
- SHA256 74a9841b730fbf433d0211236e50edd1d16cd13b673327e2c120c8aa226157c2
Malware Config
Extracted
-
quasar
-
1.4.1
-
AV FIXER
-
192.168.0.120:4782
-
192.168.0.120:4781
-
90.221.139.200:4781
-
f6eba3c7-0450-46fd-9e50-73b69dec25b9
-
encryption_key
F8FE1BE15C2DA60FFAB39E3418D9330FC7991F1C
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Epic Games
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\AV FIXER.exe"C:\Users\Admin\AppData\Local\Temp\AV FIXER.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/2228-8-0x00007FFD6B680000-0x00007FFD6C142000-memory.dmp
memory/2228-10-0x00007FFD6B680000-0x00007FFD6C142000-memory.dmp
memory/2228-11-0x000000001C4D0000-0x000000001C520000-memory.dmp
memory/2228-12-0x000000001C5E0000-0x000000001C692000-memory.dmp
memory/2228-13-0x00007FFD6B680000-0x00007FFD6C142000-memory.dmp
memory/4052-0-0x00007FFD6B683000-0x00007FFD6B685000-memory.dmp
memory/4052-1-0x0000000000590000-0x00000000008B4000-memory.dmp
memory/4052-2-0x00007FFD6B680000-0x00007FFD6C142000-memory.dmp
memory/4052-9-0x00007FFD6B680000-0x00007FFD6C142000-memory.dmp