Analysis
- max time kernel
148s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
11/08/2026, 10:31
General
- Target System33.exe
- Size 3.1MB
- Sample260811-mkhevscl9x
- SHA256 49d8504f76c269321cf2d0c1cc20f2e9cb62bfdb2598c816122b268fb4a72a6d
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.18.5:4782
-
fa94c223-1877-41f4-8a3a-ff7dbb3011b2
-
encryption_key
66DA603959D1286D678FCCFC659A6AF773652D49
-
install_name
System33.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Sys
-
reconnect_delay
3000
-
startup_key
Antimalware
-
subdirectory
System33
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Drops file in System32 directory 3 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\System33.exe"C:\Users\Admin\AppData\Local\Temp\System33.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Antimalware" /sc ONLOGON /tr "C:\Windows\system32\System33\System33.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\System33\System33.exe"C:\Windows\system32\System33\System33.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Antimalware" /sc ONLOGON /tr "C:\Windows\system32\System33\System33.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\system32\System33\System33.exeC:\Windows\system32\System33\System33.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
System33.exe
memory/568-16-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-2-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-3-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-4-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-5-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-6-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-7-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-8-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-9-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-11-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-10-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-12-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-13-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-14-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/568-1-0x0000000000F70000-0x0000000001294000-memory.dmp
memory/568-0-0x00007FFC1245F000-0x00007FFC12460000-memory.dmp
memory/3172-18-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-19-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-17-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-20-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-21-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-23-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-24-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-25-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-26-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-27-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-28-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-22-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-29-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-30-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp
memory/3172-32-0x000000001CF20000-0x000000001CF70000-memory.dmp
memory/3172-33-0x000000001D030000-0x000000001D0E2000-memory.dmp
memory/3172-34-0x00007FFC122D0000-0x00007FFC12C74000-memory.dmp