Analysis
- max time kernel
134s - max time network
135s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
17/08/2024, 01:56
General
- Target Client-built.exe
- Size 3.1MB
- Sample240817-cc49jstgln
- SHA256 317b2e1eb9a1d427e165f38f2a44bd90329b729de3f7a2d19c511e023eab73a8
Malware Config
Extracted
-
quasar
-
1.4.1
-
SKIDS
-
147.185.221.22:6712
-
545a5892-0ce9-4925-83a7-479d8b964612
-
encryption_key
9E968F05BD874BA1BE086FD1774A027473823F49
-
install_name
Windows Host Process.exe
-
log_directory
Windows-Logs
-
reconnect_delay
3000
-
startup_key
Windows Host Process
-
subdirectory
Windows
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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 6 IoCs
- Suspicious use of SendNotifyMessage 6 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- 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 "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Windows Host Process.exe
memory/1640-0-0x00007FFA9F973000-0x00007FFA9F975000-memory.dmp
memory/1640-1-0x0000000000750000-0x0000000000A7C000-memory.dmp
memory/1640-2-0x00007FFA9F970000-0x00007FFAA0431000-memory.dmp
memory/1640-9-0x00007FFA9F970000-0x00007FFAA0431000-memory.dmp
memory/4532-10-0x00007FFA9F970000-0x00007FFAA0431000-memory.dmp
memory/4532-11-0x00007FFA9F970000-0x00007FFAA0431000-memory.dmp
memory/4532-12-0x000000001C6D0000-0x000000001C720000-memory.dmp
memory/4532-13-0x000000001C7E0000-0x000000001C892000-memory.dmp
memory/4532-16-0x000000001C760000-0x000000001C772000-memory.dmp
memory/4532-17-0x000000001CFE0000-0x000000001D01C000-memory.dmp
memory/4532-18-0x00007FFA9F970000-0x00007FFAA0431000-memory.dmp