Analysis
- max time kernel
150s - max time network
150s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260618-en - resource tags
- submitted
22/06/2026, 02:47
General
- Target base.co.exe
- Size 3.1MB
- Sample260622-c91bvsgx2p
- SHA256 0b657739d1b9231c34dc79ccfdd81a8fabf27719d8ea3f3c691046fd298c23d2
Malware Config
Extracted
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quasar
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1.4.1
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Office04
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base.co.com:443
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www.base.co.com:443
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base.co.com:80
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www.base.co.com:80
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fd4340bb-b742-4084-9012-046986f062a9
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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
-
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\base.co.exe"C:\Users\Admin\AppData\Local\Temp\base.co.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/1156-12-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-22-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-3-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-4-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-5-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-6-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-7-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-8-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-9-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-10-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-11-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-0-0x00007FFE78E3F000-0x00007FFE78E40000-memory.dmp
memory/1156-2-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-1-0x0000000000650000-0x0000000000974000-memory.dmp
memory/1156-13-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/1156-14-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-17-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-18-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-19-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-20-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-21-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-16-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp
memory/6056-24-0x000000001D030000-0x000000001D080000-memory.dmp
memory/6056-25-0x000000001D140000-0x000000001D1F2000-memory.dmp
memory/6056-26-0x00007FFE78CB0000-0x00007FFE79654000-memory.dmp