General

  • Target
    https://cdn.discordapp.com/attachments/1522681949595111444/1531801358989263068/kryptonclient.jar?ex=6a6c82ef&is=6a6b316f&hm=3aa6b0ac147a77f32550e47113ade3a3306ba07501fcc70e386857536777e1bd&
  • Sample260730-q9hcyabl9v

Malware Config

Targets

    • Target
      https://cdn.discordapp.com/attachments/1522681949595111444/1531801358989263068/kryptonclient.jar?ex=6a6c82ef&is=6a6b316f&hm=3aa6b0ac147a77f32550e47113ade3a3306ba07501fcc70e386857536777e1bd&
    • Family: xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Executes dropped EXE

    • Loads dropped DLL

    • Outbound SSH connection to public host

      SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks