Analysis
- max time kernel
147s - max time network
108s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
25/07/2024, 02:40
General
- Target 3056-31-0x0000000000340000-0x0000000000E3E000-memory.exe
- Size 11.0MB
- Sample240725-c56cbatdkq
- SHA256 d9a547593c033462d0c0c2b682e988de7b2e8cc4a0e93b91c056facb5ff031f7
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
127.0.0.1:4782
-
81e63d28-e2f8-444a-a65c-9e2953d9fccc
-
encryption_key
9128320CBAFA989ABD1806CCB3DFAA229DAC9EC0
-
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
- Themida packer 2 IoCs
Detects Themida, an advanced Windows software protection system.
- 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\3056-31-0x0000000000340000-0x0000000000E3E000-memory.exe"C:\Users\Admin\AppData\Local\Temp\3056-31-0x0000000000340000-0x0000000000E3E000-memory.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
- 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\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/512-10-0x00007FFC558D0000-0x00007FFC56391000-memory.dmp
memory/512-11-0x00007FFC558D0000-0x00007FFC56391000-memory.dmp
memory/512-12-0x000000001CBF0000-0x000000001CC40000-memory.dmp
memory/512-13-0x000000001CD00000-0x000000001CDB2000-memory.dmp
memory/512-14-0x00007FFC558D0000-0x00007FFC56391000-memory.dmp
memory/2592-0-0x00007FFC558D3000-0x00007FFC558D5000-memory.dmp
memory/2592-1-0x0000000000ED0000-0x00000000019CE000-memory.dmp
memory/2592-2-0x00007FFC558D0000-0x00007FFC56391000-memory.dmp
memory/2592-9-0x00007FFC558D0000-0x00007FFC56391000-memory.dmp