Analysis
- max time kernel
6s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
22/08/2026, 06:45
General
- Target j8kbet.exe
- Size 3.1MB
- Sample260822-hh76aaed89
- SHA256 18d429b2af7e1c5e9cba9b6510933f486c5c9278127c31e587a8d0105060eae6
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
j8kbet.com:443
-
www.j8kbet.com:443
-
j8kbet.com:80
-
www.j8kbet.com:80
-
00aec19e-9bda-4ea6-b578-9286aab8d699
-
encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of WriteProcessMemory 3 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\j8kbet.exe"C:\Users\Admin\AppData\Local\Temp\j8kbet.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⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- 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⤵
- Scheduled Task/Job: Scheduled Task
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/792-30-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-29-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-17-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-25-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-24-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-23-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-22-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-21-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-20-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-19-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/792-16-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-7-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-0-0x00007FFE8982F000-0x00007FFE89830000-memory.dmp
memory/3800-14-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-12-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-11-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-18-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-10-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-9-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-8-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-13-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-6-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-5-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-4-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-3-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/3800-1-0x0000000000540000-0x0000000000864000-memory.dmp
memory/3800-2-0x00007FFE896A0000-0x00007FFE8A044000-memory.dmp
memory/5432-28-0x000000001D830000-0x000000001D8E2000-memory.dmp
memory/5432-27-0x000000001D720000-0x000000001D770000-memory.dmp