Analysis
- max time kernel
149s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20240704-en - resource tags
- submitted
05/07/2024, 22:15
General
- Target XenSero-Built.exe
- Size 3.1MB
- Sample240705-16mtcszdle
- SHA256 88a4a9ff82226d5d78988a8c970910ed0c66025c9b4b0b5f83acbb9337f77562
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
147.185.221.20:9835
-
147.185.221.20:18563
-
f0b11cef-e5ee-4de4-8050-d0e2b1ed200b
-
encryption_key
72276B19006F382DD49891C281A8AE57773E9723
-
install_name
Update.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Update
-
subdirectory
Keys
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 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 3 IoCs
- Suspicious use of SendNotifyMessage 3 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\XenSero-Built.exe"C:\Users\Admin\AppData\Local\Temp\XenSero-Built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\Keys\Update.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\Keys\Update.exe"C:\Windows\system32\Keys\Update.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- 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 "Update" /sc ONLOGON /tr "C:\Windows\system32\Keys\Update.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Update.exe
memory/696-0-0x00007FFF66493000-0x00007FFF66495000-memory.dmp
memory/696-1-0x0000000000DA0000-0x00000000010CA000-memory.dmp
memory/696-2-0x00007FFF66490000-0x00007FFF66F51000-memory.dmp
memory/696-9-0x00007FFF66490000-0x00007FFF66F51000-memory.dmp
memory/4920-10-0x00007FFF66490000-0x00007FFF66F51000-memory.dmp
memory/4920-11-0x00007FFF66490000-0x00007FFF66F51000-memory.dmp
memory/4920-12-0x000000001C8A0000-0x000000001C8F0000-memory.dmp
memory/4920-13-0x000000001C9B0000-0x000000001CA62000-memory.dmp
memory/4920-14-0x00007FFF66490000-0x00007FFF66F51000-memory.dmp
memory/4920-15-0x000000001C910000-0x000000001C922000-memory.dmp
memory/4920-16-0x000000001C970000-0x000000001C9AC000-memory.dmp