Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
15/04/2026, 08:32
General
- Target Client-built.exe
- Size 3.1MB
- Sample260415-kffpcshx6k
- SHA256 4736f8330bf3a3e8301ec22a66473afce537723c887cbdf2d9605827b69f6c74
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
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rophimz.fm:443
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www.rophimz.fm:443
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rophimz.fm:80
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www.rophimz.fm:80
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caa0cf18-be02-4073-802b-fbb9c0d37c99
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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
- 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.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
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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 SetWindowsHookEx
- 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 /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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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/2404-0-0x0000000000D80000-0x00000000010A4000-memory.dmp
memory/2404-1-0x000000001BDB0000-0x000000001BDC0000-memory.dmp
memory/2404-10-0x000000001BD50000-0x000000001BD62000-memory.dmp
memory/2404-9-0x00000000032B0000-0x00000000032B8000-memory.dmp
memory/2404-8-0x00000000032A0000-0x00000000032AC000-memory.dmp
memory/3792-19-0x00000000013E0000-0x00000000013EC000-memory.dmp
memory/3792-17-0x000000001C500000-0x000000001C550000-memory.dmp
memory/3792-18-0x000000001C610000-0x000000001C6C2000-memory.dmp
memory/3792-11-0x00000000013F0000-0x0000000001400000-memory.dmp
memory/3792-20-0x0000000001400000-0x0000000001408000-memory.dmp
memory/3792-21-0x0000000002D70000-0x0000000002D82000-memory.dmp
memory/3792-23-0x00000000013F0000-0x0000000001400000-memory.dmp
memory/3792-22-0x000000001BF60000-0x000000001C00F000-memory.dmp
memory/4132-15-0x000000001BC70000-0x000000001BC78000-memory.dmp
memory/4132-14-0x0000000003280000-0x000000000328C000-memory.dmp
memory/4132-16-0x000000001BCE0000-0x000000001BCF2000-memory.dmp