Analysis
- max time kernel
149s - max time network
145s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
21/06/2026, 08:14
General
- Target Client-built.exe
- Size 3.1MB
- Sample260621-j5devscs7l
- SHA256 324ed61e3c931dfbae9ffd858cc5cedbe6d2383c99f78294a8108555c4dec809
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.254.105:4782
-
be73296a-9327-4b06-87be-88ff652c269c
-
encryption_key
5FE9A1ED814960F1F6CDE52AC7F7FB74E3A0AC67
-
install_name
Windows_Security.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Windows Security Startup
-
subdirectory
Windows Security
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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 2 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-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Security Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security\Windows_Security.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\Windows Security\Windows_Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security\Windows_Security.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Security Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security\Windows_Security.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Windows_Security.exe
memory/4360-8-0x000000001BC80000-0x000000001BC90000-memory.dmp
memory/4360-9-0x000000001BAE0000-0x000000001BB30000-memory.dmp
memory/4360-10-0x000000001CC00000-0x000000001CCB2000-memory.dmp
memory/4360-11-0x000000001BC80000-0x000000001BC90000-memory.dmp
memory/4572-0-0x00000000004C0000-0x00000000007E4000-memory.dmp
memory/4572-1-0x0000000002A40000-0x0000000002A50000-memory.dmp