Analysis
- max time kernel
150s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20240412-en - resource tags
- submitted
19/04/2024, 19:27
General
- Target Client-built.exe
- Size 3.1MB
- Sample240419-x6dc5seb2v
- SHA256 cefc4a374827abbf22fbf34da0a020a564af27e6128281a26b253a55b4c7c613
Malware Config
Extracted
-
quasar
-
1.4.1
-
SEROR0X
-
192.168.1.20:4782
-
b27f4012-47c7-475d-a03a-00f905b66b14
-
encryption_key
8B2F470BFD440CA7BEAC354C6384288FF85968FB
-
install_name
Windows.exe
-
log_directory
Error Logs
-
reconnect_delay
3000
-
startup_key
Windows
-
subdirectory
Windows
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 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 "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Windows.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\Windows\Windows.exe"C:\Users\Admin\AppData\Roaming\Windows\Windows.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Windows.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Windows.exe
memory/1408-0-0x00000000003D0000-0x00000000006F4000-memory.dmp
memory/1408-1-0x00007FFED9260000-0x00007FFED9D22000-memory.dmp
memory/1408-2-0x000000001B440000-0x000000001B450000-memory.dmp
memory/1408-9-0x00007FFED9260000-0x00007FFED9D22000-memory.dmp
memory/3708-11-0x000000001BDA0000-0x000000001BDB0000-memory.dmp
memory/3708-10-0x00007FFED9260000-0x00007FFED9D22000-memory.dmp
memory/3708-12-0x000000001CCE0000-0x000000001CD30000-memory.dmp
memory/3708-13-0x000000001CDF0000-0x000000001CEA2000-memory.dmp
memory/3708-14-0x00007FFED9260000-0x00007FFED9D22000-memory.dmp
memory/3708-15-0x000000001BDA0000-0x000000001BDB0000-memory.dmp