General

  • Target
    618b33a72f9144d36da3ed9e1b84069bf996821512d8ab30297da3bea81633c5.vbs
  • Size 2.0MB
  • Sample240607-b37a6agf36
  • SHA256 618b33a72f9144d36da3ed9e1b84069bf996821512d8ab30297da3bea81633c5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.astramedikal.com

  • Port

    587

  • Password

    muhasebe2020*

Extracted

Family
  • xworm

Version
  • 5.0

Mutex
  • etZTVSwBlveCYECe

Attributes
  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/Msa6vJjt

aes.plain

Extracted

Family
  • agenttesla

Credentials

Targets

    • Target
      618b33a72f9144d36da3ed9e1b84069bf996821512d8ab30297da3bea81633c5.vbs
    • Size 2.0MB
    • SHA256 618b33a72f9144d36da3ed9e1b84069bf996821512d8ab30297da3bea81633c5
    • MD5 SHA1 SHA512 SSDEEP
    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks