General

  • Target

    f17d07b910370d463155b794970c54a2624cadbcd809c252f0e8567dc68ce4c6.tar

  • Size

    770KB

  • Sample

    240522-c5dx3ahh3w

  • MD5

    24a8505c2bda522c6fcac5e2dce48945

  • SHA1

    fca5ccb5f1d83aed72a7a305ed89ba5ebf2dd047

  • SHA256

    f17d07b910370d463155b794970c54a2624cadbcd809c252f0e8567dc68ce4c6

  • SHA512

    4ebe85c8f0fbcd7d5b2ceb731a7fe61a5dfec8eeaee013c4a53e58dac8505d2d16ec4627f75bc9bbf83cd68604106aee29e5325769b603ba312d137f2ee4d9be

  • SSDEEP

    12288:lIeWET/mr9K+22BEEzFatnhghS5+v+DUVNf5MWl0axTbo+i1Cv7z2CjH8mri7jY3:5Wtb3BEMhS5qOk5SVC+CjcmWg

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.deblokhoeve.be
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Blokhoeve2490.i

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      Invoice,cost inquiry_PDF.exe

    • Size

      768KB

    • MD5

      aa2e0331db7bdc7c4a51a4d9ca2f4832

    • SHA1

      fc6ee67838401e8cbcef4e2c547d06cb56f12628

    • SHA256

      f0e352c3fbf73706c4c0fd2e118cf10b241dd880b58ceb67491b585fa5719fad

    • SHA512

      42c7e114bd9fa67301724481c893bfaa95ec633b53328d157b95e26fe6c4ca29e29cbda5ac0bcc73577865d18d4c3875fc2c08f6747f4ec926868e41c20957c3

    • SSDEEP

      12288:+IeWET/mr9K+22BEEzFatnhghS5+v+DUVNf5MWl0axTbo+i1Cv7z2CjH8mri7jY3:OWtb3BEMhS5qOk5SVC+CjcmWg

    • 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 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.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks