Analysis
- max time kernel
128s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
16/12/2024, 06:37
General
- Target installer.exe
- Size 3.1MB
- Sample241216-hdgsjaymcs
- SHA256 9b4a5a44a932c5c42086a5989f87a5261ab8e6e96bc8ea2c0cf7ca6de68bc7ad
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
192.168.68.104:4782
-
93aae856-95a8-4f87-bb5a-e035e00ec571
-
encryption_key
A9BD88FEF9A2EA52A07F5C37D168C315C868BC60
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Antimalware Core Service
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- 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 FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 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\installer.exe"C:\Users\Admin\AppData\Local\Temp\installer.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Antimalware Core 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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Antimalware Core 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/976-9-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp
memory/976-10-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp
memory/976-11-0x000000001B6D0000-0x000000001B720000-memory.dmp
memory/976-12-0x000000001D690000-0x000000001D742000-memory.dmp
memory/976-13-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp
memory/3128-0-0x00007FF96A283000-0x00007FF96A285000-memory.dmp
memory/3128-1-0x0000000000C40000-0x0000000000F64000-memory.dmp
memory/3128-2-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp
memory/3128-8-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp