Analysis
- max time kernel
136s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20240802-fr - resource tags
- submitted
18/08/2024, 22:00
General
- Target Client-built.exe
- Size 3.3MB
- Sample240818-1wn9fazeln
- SHA256 659f42a823f37790b2cbdbfc19d0755a3471bfcb0097cdf48e2f891df62f4819
Malware Config
Extracted
-
quasar
-
1.4.1
-
SKIDS
-
147.185.221.22:6712
-
1051d457-43fe-4be3-87a0-52f2e36a87aa
-
encryption_key
F387A0FF28E4F7F4D7B4E353EB2E71F75D3FB5C0
-
install_name
Windows Host Process.exe
-
log_directory
Windows-Logs
-
reconnect_delay
3000
-
startup_key
Windows Host Process
-
subdirectory
Windows
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
- 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 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⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Windows Host Process.exe
memory/2356-9-0x00007FF9F28B0000-0x00007FF9F3371000-memory.dmp
memory/2356-11-0x00007FF9F28B0000-0x00007FF9F3371000-memory.dmp
memory/2356-12-0x0000000001B30000-0x0000000001B80000-memory.dmp
memory/2356-13-0x000000001C050000-0x000000001C102000-memory.dmp
memory/2356-14-0x00007FF9F28B0000-0x00007FF9F3371000-memory.dmp
memory/3628-0-0x00007FF9F28B3000-0x00007FF9F28B5000-memory.dmp
memory/3628-1-0x0000000000E90000-0x00000000011E6000-memory.dmp
memory/3628-2-0x00007FF9F28B0000-0x00007FF9F3371000-memory.dmp
memory/3628-10-0x00007FF9F28B0000-0x00007FF9F3371000-memory.dmp