Analysis
- max time kernel
139s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20231023-en - resource tags
- submitted
20/11/2023, 01:01
General
- Target 0be05dbf68a7411493cc4a59a46e7c70.exe
- Size 3.1MB
- Sample231120-bda7esdh8s
- SHA256 d5edd5b01487cb03de09de1fd86b8588bcca053ab1c4b5ed49f9e4639102aef4
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
quasardeez.ddns.net:4782
-
9aa0fb2f-d048-4adc-acbd-2d645c244d69
-
encryption_key
E22644B8CE19FC81D2AC598ED82820552B13359A
-
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 3 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\0be05dbf68a7411493cc4a59a46e7c70.exe"C:\Users\Admin\AppData\Local\Temp\0be05dbf68a7411493cc4a59a46e7c70.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⤵
- 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 "Quasar Client Startup" /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
Loading Replay Monitor...
Downloads
Client.exe
Client.exe
memory/1484-0-0x0000000000350000-0x0000000000674000-memory.dmp
memory/1484-1-0x00007FFFAA6E0000-0x00007FFFAB1A1000-memory.dmp
memory/1484-2-0x000000001B290000-0x000000001B2A0000-memory.dmp
memory/1484-11-0x00007FFFAA6E0000-0x00007FFFAB1A1000-memory.dmp
memory/4512-9-0x00007FFFAA6E0000-0x00007FFFAB1A1000-memory.dmp
memory/4512-10-0x000000001B680000-0x000000001B690000-memory.dmp
memory/4512-12-0x000000001BC90000-0x000000001BCE0000-memory.dmp
memory/4512-13-0x000000001BDA0000-0x000000001BE52000-memory.dmp
memory/4512-14-0x00007FFFAA6E0000-0x00007FFFAB1A1000-memory.dmp
memory/4512-15-0x000000001B680000-0x000000001B690000-memory.dmp