Analysis
- max time kernel
149s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
28/08/2026, 02:45
General
- Target 461E43DA65ED883C46B72C095FD72A3E.exe
- Size 8.4MB
- Sample260828-c8x54ssfph
- SHA256 33cc64e622a224df172252aad00278e8f085925414d5fac4e821f5f7596e8c8c
Malware Config
Extracted
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quasar
-
1.4.1
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Office365
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35.86.129.120:4782
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901394fc-07f6-4354-9247-1690abbfd02f
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encryption_key
D123D7F43D63545C7A8F643ACBE73E81F35C3F14
-
install_name
Microsoft_Free_product.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
klogs
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reconnect_delay
3000
-
startup_key
windowsClient Startup
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Creates a file in the Startup directory 1 TTPs 2 IoCs
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
- Executes dropped EXE 4 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 5 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\461E43DA65ED883C46B72C095FD72A3E.exe"C:\Users\Admin\AppData\Local\Temp\461E43DA65ED883C46B72C095FD72A3E.exe"1⤵
- Creates a file in the Startup directory
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn WindowsUpdateService /tr C:\ProgramData\Microsoft\Windows\Caches\svchost.exe /sc ONLOGON /delay 0001:00 /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn WindowsUpdateService_check /tr C:\ProgramData\Microsoft\Windows\Caches\svchost.exe /sc MINUTE /mo 30 /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\ProgramData\Microsoft\Windows\Caches\svchost.exe"C:\ProgramData\Microsoft\Windows\Caches\svchost.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "windowsClient Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
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C:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exe"C:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
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C:\ProgramData\Microsoft\Windows\Caches\svchost.exeC:\ProgramData\Microsoft\Windows\Caches\svchost.exe1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exeC:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "windowsClient Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Microsoft_Free_product.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
svchost.exe
memory/2344-6-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-69-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-3-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-0-0x00007FFDED67F000-0x00007FFDED680000-memory.dmp
memory/2344-7-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-10-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-2-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-72-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-60-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/2344-1-0x0000000000070000-0x00000000008D2000-memory.dmp
memory/2344-11-0x00007FFDED4F0000-0x00007FFDEDE94000-memory.dmp
memory/4664-73-0x0000000002E60000-0x0000000002EB0000-memory.dmp
memory/4664-74-0x000000001CDF0000-0x000000001CEA2000-memory.dmp
memory/4664-77-0x0000000003010000-0x0000000003022000-memory.dmp
memory/4664-78-0x0000000003070000-0x00000000030AC000-memory.dmp
memory/6124-67-0x0000000000660000-0x0000000000988000-memory.dmp