Analysis
- max time kernel
149s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
04/06/2026, 06:14
General
- Target BruterV3.1.exe
- Size 1.3MB
- Sample260604-gzttjsav41
- SHA256 2387adbe7709475fee04203bc8209488de4235b222c9683fcf7143001858648b
Malware Config
Extracted
-
quasar
-
encryption_key
E679E56ABD1A0F53D68F323812B24E67488502F6
-
key_salt
5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382
-
reconnect_delay
3000
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 2 IoCs
- Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 2 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 3 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\BruterV3.1.exe"C:\Users\Admin\AppData\Local\Temp\BruterV3.1.exe"1⤵
- Checks for VirtualBox DLLs, possible anti-VM trick
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows_Host_Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exe"C:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exe"2⤵
- Executes dropped EXE
- Checks for VirtualBox DLLs, possible anti-VM trick
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows_Host_Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exeC:\Users\Admin\AppData\Roaming\RealtekAudio\Bruter.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Bruter.exe
memory/3752-0-0x00000187696C0000-0x0000018769814000-memory.dmp
memory/3752-1-0x0000018769C40000-0x0000018769C50000-memory.dmp
memory/3752-2-0x0000018769CE0000-0x0000018769CFA000-memory.dmp
memory/3752-3-0x000001876BE50000-0x000001876BE51000-memory.dmp
memory/3752-4-0x000001876BE50000-0x000001876BE51000-memory.dmp
memory/4616-10-0x000001CB49CA0000-0x000001CB49CB0000-memory.dmp
memory/4616-13-0x000001CB63620000-0x000001CB63670000-memory.dmp
memory/4616-14-0x000001CB63730000-0x000001CB637E2000-memory.dmp
memory/4616-15-0x000001CB635D0000-0x000001CB6361E000-memory.dmp
memory/4616-16-0x000001CB49CA0000-0x000001CB49CB0000-memory.dmp