Analysis
- max time kernel
413s - max time network
584s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
11/08/2024, 03:02
General
- Target Solara Installer.exe
- Size 3.1MB
- Sample240811-djfefasbmk
- SHA256 b9d740895052ab2f57e092e12fea8e29b974b03a3c5a896007dcb931b9f9ed87
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
realwz-34142.portmap.host:34142
-
6eb5c908-87fa-4e33-a3b3-a6eaa2455bad
-
encryption_key
458FF650B9D9D277FD5A8DC74175331B7B2FC1B9
-
install_name
Downloader.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Windows Defender
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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 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\Solara Installer.exe"C:\Users\Admin\AppData\Local\Temp\Solara Installer.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Downloader.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\SubDir\Downloader.exe"C:\Windows\system32\SubDir\Downloader.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 "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Downloader.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Downloader.exe
memory/884-0-0x00007FFBD6B73000-0x00007FFBD6B75000-memory.dmp
memory/884-1-0x0000000000D40000-0x0000000001064000-memory.dmp
memory/884-2-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp
memory/884-9-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp
memory/4016-11-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp
memory/4016-10-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp
memory/4016-12-0x00000000026F0000-0x0000000002740000-memory.dmp
memory/4016-13-0x000000001BDD0000-0x000000001BE82000-memory.dmp
memory/4016-16-0x000000001B150000-0x000000001B162000-memory.dmp
memory/4016-17-0x000000001B1B0000-0x000000001B1EC000-memory.dmp
memory/4016-18-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp
memory/4016-19-0x00007FFBD6B70000-0x00007FFBD7631000-memory.dmp