Analysis
- max time kernel
300s - max time network
294s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
20/09/2026, 16:37
General
- Target 4.exe
- Size 3.1MB
- Sample260920-t49rsaythy
- SHA256 c67ba858dfa5feab71d851b5ee432a4c7817c9c66d733e0cfdac7cb17c79ebf5
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.11.41:51879
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192.168.11.41:65338
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128.116.53.33:52610
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192.168.11.41:2177
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192.168.11.41:137
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aa4a2ba4-5541-49d5-938d-dcc66534489c
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encryption_key
B0269B148C1775F4FBC2A4C271087C43E0AC4A02
-
install_name
Client.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
RtkAudUService32
-
subdirectory
tr-TN
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Drops file in System32 directory 1 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\4.exe"C:\Users\Admin\AppData\Local\Temp\4.exe"1⤵
- 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 "RtkAudUService32" /sc ONLOGON /tr "C:\Windows\system32\tr-TN\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\tr-TN\Client.exe"C:\Windows\system32\tr-TN\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 "RtkAudUService32" /sc ONLOGON /tr "C:\Windows\system32\tr-TN\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Windows\system32\tr-TN\Client.exeC:\Windows\system32\tr-TN\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/2664-25-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-24-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-34-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-33-0x000000001D450000-0x000000001D502000-memory.dmp
memory/2664-32-0x000000001D340000-0x000000001D390000-memory.dmp
memory/2664-30-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-29-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-27-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-28-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-19-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-26-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-23-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-22-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-21-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-20-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-17-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/2664-18-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-10-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-11-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-1-0x0000000000E40000-0x0000000001164000-memory.dmp
memory/4896-14-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-13-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-12-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-16-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-0-0x00007FFA371CF000-0x00007FFA371D0000-memory.dmp
memory/4896-9-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-2-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-8-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-7-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-5-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-6-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-4-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp
memory/4896-3-0x00007FFA37040000-0x00007FFA379E4000-memory.dmp