Analysis
- max time kernel
148s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
27/10/2026, 15:16
General
- Target fustzwartewaal.nl.exe
- Size 3.1MB
- Sample261027-snsb5adh29
- SHA256 7c2bdbd77477ff3229ebe3bb63acde0e7059079ea9261d0ddcb5f0e48cc98d75
Malware Config
Extracted
-
quasar
-
1.4.1
-
fustzwartewaal.nl
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fustzwartewaal.nl:81
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fustzwartewaal.nl:80
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fustzwartewaal.nl:85
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fustzwartewaal.nl:8080
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fustzwartewaal.nl:443
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fustzwartewaal.nl:40
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539aeae4-7e5e-4483-b21d-7005f5c00923
-
encryption_key
61D61573755A2E8791F777F44FE72A8C404B3F90
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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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
- 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 WriteProcessMemory 2 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\fustzwartewaal.nl.exe"C:\Users\Admin\AppData\Local\Temp\fustzwartewaal.nl.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
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
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
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/1908-33-0x000000001D010000-0x000000001D0C2000-memory.dmp
memory/1908-32-0x0000000002FD0000-0x0000000003020000-memory.dmp
memory/3420-24-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-27-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-34-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-30-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-29-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-25-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-28-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-17-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-23-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-22-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-18-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-19-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-21-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-16-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/3420-20-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-9-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-10-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-14-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-13-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-12-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-11-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-3-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-0-0x00007FF832A5F000-0x00007FF832A60000-memory.dmp
memory/4312-26-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-4-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-8-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-7-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-6-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-2-0x00007FF8328D0000-0x00007FF833274000-memory.dmp
memory/4312-1-0x0000000000540000-0x0000000000864000-memory.dmp
memory/4312-5-0x00007FF8328D0000-0x00007FF833274000-memory.dmp