Analysis
- max time kernel
147s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
- submitted
13/04/2024, 19:15
General
- Target Client-built.exe
- Size 3.1MB
- Sample240413-xym8dage47
- SHA256 796d5a37143cb32778bab8b2210e35c22d75bfaf2368323b0d2400ace4ded468
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
LunasLove-64385.portmap.host:64285
-
29d7a2a1-3a57-4435-8407-1e32b7f510e7
-
encryption_key
717F000FA98487F20ACB7C82618D076F1B6DB848
-
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 2 IoCs
- Executes dropped EXE 1 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/2404-0-0x00000000000B0000-0x00000000003D4000-memory.dmp
memory/2404-1-0x00007FF8519B0000-0x00007FF852471000-memory.dmp
memory/2404-2-0x000000001B120000-0x000000001B130000-memory.dmp
memory/2404-9-0x00007FF8519B0000-0x00007FF852471000-memory.dmp
memory/4072-10-0x00007FF8519B0000-0x00007FF852471000-memory.dmp
memory/4072-11-0x000000001B910000-0x000000001B920000-memory.dmp
memory/4072-12-0x000000001B8C0000-0x000000001B910000-memory.dmp
memory/4072-13-0x000000001BFE0000-0x000000001C092000-memory.dmp
memory/4072-14-0x00007FF8519B0000-0x00007FF852471000-memory.dmp
memory/4072-15-0x000000001B910000-0x000000001B920000-memory.dmp