Analysis
- max time kernel
149s - max time network
148s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
27/03/2026, 03:09
General
- Target Client.exe
- Size 3.1MB
- Sample260327-dnmpbad16x
- SHA256 90d0e6342aab305c39f9d16822f318b236466948b54fdb11042698e3aacbfc53
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
aspiredesign.ie:443
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www.aspiredesign.ie:443
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aspiredesign.ie:80
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www.aspiredesign.ie:80
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b045a1b1-2adf-4170-a10b-925ef0909117
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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
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- 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.exe"C:\Users\Admin\AppData\Local\Temp\Client.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
-
-
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.log
Client.exe
memory/3960-0-0x00000000000E0000-0x0000000000404000-memory.dmp
memory/3960-1-0x000000001AFE0000-0x000000001AFF0000-memory.dmp
memory/3960-9-0x000000001AF80000-0x000000001AF92000-memory.dmp
memory/3960-8-0x00000000025F0000-0x00000000025FC000-memory.dmp
memory/3964-14-0x000000001C670000-0x000000001C682000-memory.dmp
memory/3964-13-0x00000000019F0000-0x00000000019FC000-memory.dmp
memory/4820-15-0x000000001C540000-0x000000001C590000-memory.dmp
memory/4820-11-0x0000000001150000-0x0000000001160000-memory.dmp
memory/4820-16-0x000000001C650000-0x000000001C702000-memory.dmp
memory/4820-17-0x00000000010C0000-0x00000000010CC000-memory.dmp
memory/4820-18-0x0000000001160000-0x0000000001172000-memory.dmp
memory/4820-20-0x000000001C110000-0x000000001C119000-memory.dmp
memory/4820-21-0x0000000001150000-0x0000000001160000-memory.dmp
memory/4820-19-0x000000001C590000-0x000000001C5FF000-memory.dmp