Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
18/10/2026, 11:37
General
- Target mb66-mb66.cn.exe
- Size 3.1MB
- Sample261018-nrhvmsyvbw
- SHA256 66579788af39ad2e392580851d5347069ae745a0c80e8de7b1d024e80be04361
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
mb66-mb66.cn.com:443
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www.mb66-mb66.cn.com:443
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mb66-mb66.cn.com:80
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www.mb66-mb66.cn.com:80
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9e417171-4a1d-4367-9df4-6d329901d8b9
-
encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
-
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
- 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 WriteProcessMemory 2 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\mb66-mb66.cn.exe"C:\Users\Admin\AppData\Local\Temp\mb66-mb66.cn.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
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
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
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/3520-32-0x000000001D4F0000-0x000000001D5A2000-memory.dmp
memory/3520-31-0x000000001D3E0000-0x000000001D430000-memory.dmp
memory/3804-26-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-24-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-29-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-27-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-25-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-17-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-22-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-28-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-20-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-21-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-19-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-18-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-33-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/3804-16-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-8-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-14-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-13-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-12-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-11-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-10-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-9-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-23-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-0-0x00007FF89FD7F000-0x00007FF89FD80000-memory.dmp
memory/4768-7-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-6-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-5-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-4-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-3-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-2-0x00007FF89FBF0000-0x00007FF8A0594000-memory.dmp
memory/4768-1-0x0000000000C30000-0x0000000000F54000-memory.dmp