Analysis
- max time kernel
1798s - max time network
1807s - platform
windows10-1703_x64 - resource
win10-20240221-es - resource tags
- submitted
23/02/2024, 19:33
General
- Target Server.exe
- Size 3.1MB
- Sample240223-x9l5fsff24
- SHA256 9370c4040f9d0d8ef04b8a6182f8e6ba968dd3718a4e49a5fbb45b7695c5fba5
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.0.106:4782
-
a3c55058-34d6-4f60-8f08-dfaec88ee937
-
encryption_key
C4F266F5844303A350FCE489DCF9CF44A85DA330
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Windows
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Creates scheduled task(s) 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 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\Server.exe"C:\Users\Admin\AppData\Local\Temp\Server.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/216-0-0x0000000000450000-0x0000000000774000-memory.dmp
memory/216-1-0x00007FFB74CC0000-0x00007FFB756AC000-memory.dmp
memory/216-2-0x000000001B4B0000-0x000000001B4C0000-memory.dmp
memory/216-9-0x00007FFB74CC0000-0x00007FFB756AC000-memory.dmp
memory/4800-10-0x00007FFB74CC0000-0x00007FFB756AC000-memory.dmp
memory/4800-11-0x000000001B560000-0x000000001B570000-memory.dmp
memory/4800-12-0x000000001BA70000-0x000000001BAC0000-memory.dmp
memory/4800-13-0x000000001BB80000-0x000000001BC32000-memory.dmp
memory/4800-14-0x00007FFB74CC0000-0x00007FFB756AC000-memory.dmp
memory/4800-15-0x000000001B560000-0x000000001B570000-memory.dmp