Analysis
- max time kernel
140s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
11/08/2024, 06:59
General
- Target 6940c38a8661b0b8713afd4c63b12456.exe
- Size 3.1MB
- Sample240811-hr3xxstdjc
- SHA256 42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
businesses-eric.gl.at.ply.gg:55282
-
ebfbd873-38ee-4f7b-bfe9-2b77cdff1c45
-
encryption_key
361A99FCBAEDCD5C706B5E52C37C90BFB4E13FB2
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
1000
-
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
- 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 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\6940c38a8661b0b8713afd4c63b12456.exe"C:\Users\Admin\AppData\Local\Temp\6940c38a8661b0b8713afd4c63b12456.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\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/4836-0-0x00007FFFCDA13000-0x00007FFFCDA15000-memory.dmp
memory/4836-1-0x0000000000610000-0x0000000000934000-memory.dmp
memory/4836-2-0x00007FFFCDA10000-0x00007FFFCE4D1000-memory.dmp
memory/4836-10-0x00007FFFCDA10000-0x00007FFFCE4D1000-memory.dmp
memory/4928-9-0x00007FFFCDA10000-0x00007FFFCE4D1000-memory.dmp
memory/4928-11-0x00007FFFCDA10000-0x00007FFFCE4D1000-memory.dmp
memory/4928-12-0x000000001C970000-0x000000001C9C0000-memory.dmp
memory/4928-13-0x000000001CA80000-0x000000001CB32000-memory.dmp
memory/4928-14-0x00007FFFCDA10000-0x00007FFFCE4D1000-memory.dmp