Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20251231-en - resource tags
- submitted
25/01/2026, 12:26
General
- Target steal_a_brainrot_script.exe
- Size 3.1MB
- Sample260125-pl6j7abx2c
- SHA256 760d30ccdad1bf467f43105b572990828a36546389dd957185b700241e95501b
Malware Config
Extracted
-
quasar
-
1.4.1
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Office01
-
jefafe2169-35904.portmap.host:35904
-
a311f31d-5d72-4153-8431-3c6ea0f65737
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encryption_key
E96EC6F9641B430EFC4A3302FE58CDBC832B1FC9
-
install_name
windows_update.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Windows 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 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\steal_a_brainrot_script.exe"C:\Users\Admin\AppData\Local\Temp\steal_a_brainrot_script.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows_update.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\windows_update.exe"C:\Users\Admin\AppData\Roaming\SubDir\windows_update.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows_update.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Users\Admin\AppData\Roaming\SubDir\windows_update.exeC:\Users\Admin\AppData\Roaming\SubDir\windows_update.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
windows_update.exe
memory/4892-0-0x0000000000EE0000-0x0000000001204000-memory.dmp
memory/4892-1-0x000000001BFB0000-0x000000001BFC0000-memory.dmp
memory/5068-8-0x000000001BAA0000-0x000000001BAB0000-memory.dmp
memory/5068-10-0x000000001C510000-0x000000001C560000-memory.dmp
memory/5068-11-0x000000001C620000-0x000000001C6D2000-memory.dmp
memory/5068-12-0x000000001BAA0000-0x000000001BAB0000-memory.dmp