Analysis
- max time kernel
149s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
02/07/2026, 03:59
General
- Target windownupdate.exe
- Size 3.1MB
- Sample260702-ej877abw7x
- SHA256 be220e0d2e31c303bb49ca9817e1319f2a6d9d32210af9022d1a1635a1e2d493
Malware Config
Extracted
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quasar
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1.4.1
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www.lpc.uk.com
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www.lpc.uk.com:4782
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www.lpc.uk.com:8080
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www.lpc.uk.com:80
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www.lpc.uk.com:443
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www.lpc.uk.com:8443
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c5d2d708-e66f-4351-b915-e068af7ab273
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encryption_key
7DB184117F5356211726F6C83149373E39585AB4
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install_name
svchost.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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reconnect_delay
3000
-
startup_key
https://www.lpc.uk.com
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Drops file in System32 directory 5 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\windownupdate.exe"C:\Users\Admin\AppData\Local\Temp\windownupdate.exe"1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "https://www.lpc.uk.com" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\SubDir\svchost.exe"C:\Windows\system32\SubDir\svchost.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "https://www.lpc.uk.com" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\system32\SubDir\svchost.exeC:\Windows\system32\SubDir\svchost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
svchost.exe
memory/2032-10-0x000000001F360000-0x000000001F3B0000-memory.dmp
memory/2032-11-0x000000001F470000-0x000000001F522000-memory.dmp
memory/4440-0-0x0000000000CE0000-0x0000000001004000-memory.dmp
memory/4440-1-0x00000000032A0000-0x00000000032B0000-memory.dmp