Analysis
- max time kernel
150s - max time network
145s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
28/11/2024, 09:15
General
- Target Client-built.exe
- Size 3.1MB
- Sample241128-k785zsynal
- SHA256 8efce1455cb1ecf70efd19472b9215663687fd94cc16f6eac07592d27cf82ce1
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.1.39:4782
-
3b241461-adb5-459a-81b3-0e7413c3b174
-
encryption_key
7928B7E8CF671D0E7D6DF9547E85C7460DB50B8D
-
install_name
fortnite1.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 family
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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 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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\fortnite1.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\fortnite1.exe"C:\Users\Admin\AppData\Roaming\SubDir\fortnite1.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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\fortnite1.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
fortnite1.exe
memory/4532-10-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp
memory/4532-11-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp
memory/4532-12-0x000000001DE90000-0x000000001DEE0000-memory.dmp
memory/4532-13-0x000000001DFA0000-0x000000001E052000-memory.dmp
memory/4532-14-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp
memory/4844-0-0x00007FF9DB8B3000-0x00007FF9DB8B5000-memory.dmp
memory/4844-1-0x00000000004B0000-0x00000000007D4000-memory.dmp
memory/4844-2-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp
memory/4844-9-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp