Analysis
- max time kernel
149s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
12/08/2026, 06:55
General
- Target sunwinbc.exe
- Size 3.1MB
- Sample260812-hpsdeaxyas
- SHA256 d073f7cda2214a517e988bf825dbb987fe22c6a4caf22f6cec003ea74bdf3aba
Malware Config
Extracted
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quasar
-
1.4.1
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Office04
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sunwinbc.com:443
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www.sunwinbc.com:443
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sunwinbc.com:80
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www.sunwinbc.com:80
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9022a4ac-b013-4523-842c-f39af49ecc50
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encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
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install_name
Client.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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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 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
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C:\Users\Admin\AppData\Local\Temp\sunwinbc.exe"C:\Users\Admin\AppData\Local\Temp\sunwinbc.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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 WriteProcessMemory
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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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-
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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
memory/1720-28-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-27-0x000000001D710000-0x000000001D7C2000-memory.dmp
memory/1720-26-0x000000001D600000-0x000000001D650000-memory.dmp
memory/1720-24-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-23-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-22-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-18-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-21-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-20-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-19-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/1720-17-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-7-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-9-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-11-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-13-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-12-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-16-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-10-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-14-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-8-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-0-0x00007FFB0B42F000-0x00007FFB0B430000-memory.dmp
memory/6072-6-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-5-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-4-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-3-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-2-0x00007FFB0B2A0000-0x00007FFB0BC44000-memory.dmp
memory/6072-1-0x0000000000AA0000-0x0000000000DC4000-memory.dmp