Analysis
- user interaction
yes - max time kernel
149s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
02/08/2026, 16:34
General
- Target Cleaner.exe
- Size 3.1MB
- Sample260802-t3lcsscg42
- SHA256 faf317dbcef57146b9e2273df9204e6b3edd4f91c1855005e699b9f6f13193a8
Malware Config
Extracted
-
quasar
-
1.4.1
-
Cleaner
-
41.193.168.207:4782
-
73d78167-798f-47ea-b5e4-c82766208172
-
encryption_key
C8E4DBEF30F87C1CD06A0C6ECB435F0507D0C21C
-
install_name
Cleaner.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
microsoft_keyboard
-
reconnect_delay
3000
-
startup_key
Microsoft startup
-
subdirectory
Microsoft
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 5 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 SetWindowsHookEx 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\Cleaner.exe"C:\Users\Admin\AppData\Local\Temp\Cleaner.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft startup" /sc ONLOGON /tr "C:\Windows\system32\Microsoft\Cleaner.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\Microsoft\Cleaner.exe"C:\Windows\system32\Microsoft\Cleaner.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft startup" /sc ONLOGON /tr "C:\Windows\system32\Microsoft\Cleaner.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\system32\Microsoft\Cleaner.exeC:\Windows\system32\Microsoft\Cleaner.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Cleaner.exe.log
Cleaner.exe
memory/1144-0-0x0000000000C40000-0x0000000000F64000-memory.dmp
memory/1144-1-0x000000001BB70000-0x000000001BB80000-memory.dmp
memory/2264-9-0x000000001B000000-0x000000001B010000-memory.dmp
memory/2264-12-0x000000001C2E0000-0x000000001C392000-memory.dmp
memory/2264-11-0x000000001C1D0000-0x000000001C220000-memory.dmp
memory/2264-13-0x000000001B000000-0x000000001B010000-memory.dmp