General

  • Target

    495eaacfff0314abd6604c62dce224eac646de70dcba485f2eb8d02dab9b22a5

  • Size

    691KB

  • Sample

    240618-zz3esswgle

  • MD5

    5d059a701139a360858887ce28367d2d

  • SHA1

    73c34ee0475b670120c88f61c8bd7a77adc47bde

  • SHA256

    495eaacfff0314abd6604c62dce224eac646de70dcba485f2eb8d02dab9b22a5

  • SHA512

    11087724086fa91dc199000ae70e35551f0b8b348327689d25e5d075d71d95d16ea3668587907121b007aa51380a767c643c6ad1f334d2f64162ada153a96ac7

  • SSDEEP

    12288:xF2iNvFIsPAz1pPt1uZCxuoaFiCXOJgTUMBcwmFKsufLsE3s7sef5:b1DIKk1pzu0vaFiFJuevFKzLV7eh

Malware Config

Extracted

Family

agenttesla

Credentials

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.bonnyriggdentalsurgery.com.au
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ]*AU.9]&*Ybe

Targets

    • Target

      495eaacfff0314abd6604c62dce224eac646de70dcba485f2eb8d02dab9b22a5

    • Size

      691KB

    • MD5

      5d059a701139a360858887ce28367d2d

    • SHA1

      73c34ee0475b670120c88f61c8bd7a77adc47bde

    • SHA256

      495eaacfff0314abd6604c62dce224eac646de70dcba485f2eb8d02dab9b22a5

    • SHA512

      11087724086fa91dc199000ae70e35551f0b8b348327689d25e5d075d71d95d16ea3668587907121b007aa51380a767c643c6ad1f334d2f64162ada153a96ac7

    • SSDEEP

      12288:xF2iNvFIsPAz1pPt1uZCxuoaFiCXOJgTUMBcwmFKsufLsE3s7sef5:b1DIKk1pzu0vaFiFJuevFKzLV7eh

    • AgentTesla

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

    • Detect packed .NET executables. Mostly AgentTeslaV4.

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

    • Detects executables packed with SmartAssembly

    • 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

    • Command and Scripting Interpreter: PowerShell

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

    • Checks computer location settings

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

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks