General

  • Target

    16a15febf0467c21e09bbec34a1ac6c4ef59e9398620005a72c8de22b9d177ca.rar

  • Size

    760KB

  • Sample

    240427-bmjj6agg4y

  • MD5

    a22771da1b634d78656fabc6788d9fda

  • SHA1

    5c08f0e27fc91ccf20086d95122af27c886aa2ea

  • SHA256

    16a15febf0467c21e09bbec34a1ac6c4ef59e9398620005a72c8de22b9d177ca

  • SHA512

    2a740f1c3285a3738f5fc2eb03e1d347deb75bf655cccaadd48d3f865f18c5d9757984ad1849a1c8d98ef87744bcb5ecd3f93d664fda92c63e6798c695a4efc5

  • SSDEEP

    12288:NXywjWHz41z7+0TKtRjMqPsHIH0uOhnnlpFAMr5H+/5+VZKuGvkSgPAuu/WvQTR0:xywjWT+7EPsHIHvcnl3AyH+howJcSZux

Malware Config

Extracted

Family

agenttesla

Credentials

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.fascia-arch.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    HERbertstown1987

Targets

    • Target

      BL copy PDF.bat

    • Size

      822KB

    • MD5

      5a12438b3b4c926c12a9376c7bf13426

    • SHA1

      c3185c6a5e5f07a5befbe4af7131d05634f5d1a3

    • SHA256

      1a794211deaa0ecb6abc6101d7c1bd61111b4dd2d895ee7ecf78fbf17f4c9ab3

    • SHA512

      16c1e0e18eb8b3345b8b05443b782cb1dd35492ac986811c39f3cdce8dfe85b003aba029ffca0e38aa33c951d0d08281825152b0e239471eac3de18ac67864d0

    • SSDEEP

      12288:tEqnHvjNIrpf9rN/mc/CaBmIwsyaPSIir97G6NLOZCGKEgbjuPBB5uO12rq:txPjKr5BNDWVxcSIiRG6atlB5N

    • 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

    • 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