General

  • Target
    a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs
  • Size 162KB
  • Sample240501-b97khadc6v
  • SHA256 a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    smtp.gmail.com

  • Port

    587

  • Password

    vknk bnwz oyuc ljbp

Extracted

Family
  • agenttesla

Credentials

Targets

    • Target
      a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs
    • Size 162KB
    • SHA256 a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5
    • MD5 SHA1 SHA512 SSDEEP
    • AgentTesla

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

    • WSHRAT

      WSHRAT is a variant of Houdini worm and has vbs and js variants.

    • WSHRAT payload

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • 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

    • Blocklisted process makes network request

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v15

Tasks