Analysis
- max time kernel
149s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
30/06/2024, 16:46
General
- Target Client-built.exe
- Size 3.1MB
- Sample240630-vaevzstgrr
- SHA256 0a1af9ad6684d877f7c58b00bec90875ccfd709f547fe396a87a9c26e881977b
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
86.137.1.84:4782
-
adc301f6-35ca-4636-b286-ad2aef63f877
-
encryption_key
54B7AB1A151267275EF24D335CE7E3B6ABDDC53E
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Microsoft Launcher Task Manager
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft Launcher Task Manager" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft Launcher Task Manager" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\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/2808-10-0x00007FFB58520000-0x00007FFB58FE1000-memory.dmp
memory/2808-11-0x00007FFB58520000-0x00007FFB58FE1000-memory.dmp
memory/2808-12-0x000000001DFA0000-0x000000001DFF0000-memory.dmp
memory/2808-13-0x000000001E0B0000-0x000000001E162000-memory.dmp
memory/2808-14-0x00007FFB58520000-0x00007FFB58FE1000-memory.dmp
memory/3488-0-0x00007FFB58523000-0x00007FFB58525000-memory.dmp
memory/3488-1-0x0000000000B90000-0x0000000000EB4000-memory.dmp
memory/3488-2-0x00007FFB58520000-0x00007FFB58FE1000-memory.dmp
memory/3488-9-0x00007FFB58520000-0x00007FFB58FE1000-memory.dmp