Analysis
- max time kernel
147s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
10/01/2024, 08:01
General
- Target Client.exe
- Size 3.1MB
- Sample240110-jwjkhsbehm
- SHA256 dcb852bbdd6ebe2221c3e5126c3d0ad98c626f1cdc425fc1b68dbf59eb798a45
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
127.0.0.1:4782
-
fd00eaa6-29fb-47f7-94b6-d10c7e29f552
-
encryption_key
5F396B3E54B2C9046A48C7B5FCBD7BA9D3AC62A9
-
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
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 2 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.exe"C:\Users\Admin\AppData\Local\Temp\Client.exe"1⤵
- 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 /f2⤵
- Creates scheduled task(s)
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
memory/2024-0-0x0000000000770000-0x0000000000A94000-memory.dmp
memory/2024-2-0x0000000001360000-0x0000000001370000-memory.dmp
memory/2024-1-0x00007FFD39670000-0x00007FFD3A131000-memory.dmp
memory/2024-3-0x000000001B810000-0x000000001B860000-memory.dmp
memory/2024-4-0x000000001C040000-0x000000001C0F2000-memory.dmp
memory/2024-5-0x00007FFD39670000-0x00007FFD3A131000-memory.dmp
memory/2024-6-0x0000000001360000-0x0000000001370000-memory.dmp