Analysis
- max time kernel
147s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20240802-en - resource tags
- submitted
09/08/2024, 14:25
General
- Target 973836c8c986f9f40c16e139b1bc414d5356047eb78218f54191297b05792538.exe
- Size 3.1MB
- Sample240809-rrmelsvhqa
- SHA256 973836c8c986f9f40c16e139b1bc414d5356047eb78218f54191297b05792538
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
147.45.44.138:4782
-
74661366-3221-4ef8-a135-99063277201a
-
encryption_key
9F5E83CF4EAD1B51E34A8D5F82E492881AB9FF3B
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Yandex.service
-
subdirectory
SubDir
Signatures
- 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 SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 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\973836c8c986f9f40c16e139b1bc414d5356047eb78218f54191297b05792538.exe"C:\Users\Admin\AppData\Local\Temp\973836c8c986f9f40c16e139b1bc414d5356047eb78218f54191297b05792538.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Yandex.service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Yandex.service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/480-10-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp
memory/480-11-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp
memory/480-12-0x0000000002CA0000-0x0000000002CF0000-memory.dmp
memory/480-13-0x000000001C1C0000-0x000000001C272000-memory.dmp
memory/480-14-0x0000000002D30000-0x0000000002D42000-memory.dmp
memory/480-15-0x000000001B990000-0x000000001B9CC000-memory.dmp
memory/480-16-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp
memory/1004-0-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp
memory/1004-1-0x0000000000860000-0x0000000000B84000-memory.dmp
memory/1004-2-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp
memory/1004-9-0x00007FFF762C0000-0x00007FFF764C9000-memory.dmp