Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
29/06/2026, 03:06
General
- Target Client.exe
- Size 3.1MB
- Sample260629-dlyc2aby71
- SHA256 baf4093a4da23671b331ed5e70a3115da1a898170558dc474ad042cc60274c58
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
5769.cn.com:443
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www.5769.cn.com:443
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5769.cn.com:80
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www.5769.cn.com:80
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9258ce66-7ec1-488e-8397-e57601101583
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encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
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install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 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 3 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 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.exe"C:\Users\Admin\AppData\Local\Temp\Client.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⤵
- Scheduled Task/Job: Scheduled Task
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-
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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Client.exe.log
Client.exe
memory/1268-9-0x000000001B9F0000-0x000000001BA00000-memory.dmp
memory/1268-12-0x000000001C690000-0x000000001C742000-memory.dmp
memory/1268-11-0x000000001C580000-0x000000001C5D0000-memory.dmp
memory/1268-13-0x000000001B9F0000-0x000000001BA00000-memory.dmp
memory/4020-0-0x0000000000A20000-0x0000000000D44000-memory.dmp
memory/4020-1-0x000000001B950000-0x000000001B960000-memory.dmp