General

  • Target

    a6ebe5502b666ef55ff9dc168ce6c2e7cd72ee350b9d526713cef91b779afe9d.img

  • Size

    1.2MB

  • Sample

    240430-b5fafshc3w

  • MD5

    231ff6478230f8f2b28eecfec9ab901c

  • SHA1

    f393456b1086bf9794f0c899333788b372da1322

  • SHA256

    a6ebe5502b666ef55ff9dc168ce6c2e7cd72ee350b9d526713cef91b779afe9d

  • SHA512

    edf5f4c4aea5488483f0a88d642f57263e578512b221b962b0b584ae59b603ea5743e45b9d1cf8ae084c1f9bd5bcfa91c912bc7c64fa33d4b2db72d3f7c43d98

  • SSDEEP

    12288:44OB778QbN5vI3vIXpeFIJMTzfSmzQy3kymdJTRD1iKNDsreh5DSqiUNeGSggAU:FOBNN5QAZHJozSyC9PDX5WaXVU

Malware Config

Extracted

Family

agenttesla

Credentials

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.kowalskiokna.pl
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    artgeruhst75g

Targets

    • Target

      cXPFfk0pBp7bEsb.pif

    • Size

      666KB

    • MD5

      3e142ca68f08905cab743c39bf7f53ba

    • SHA1

      65ff38bc2e98f89f01088e77f921230c02ed870d

    • SHA256

      18f44886b9280533487b58a1feab7a3ebb463718417109643467315250b460b3

    • SHA512

      afd533e46aa2cdc398d11c7422d7aff25dcafadcaf1b15084b5bec0c5890de2634ad09b8cca37d56e2692dfc63c5a96ad493fc719104fa610f2f36c3968df164

    • SSDEEP

      12288:W4OB778QbN5vI3vIXpeFIJMTzfSmzQy3kymdJTRD1iKNDsreh5DSqiUNeGSggAU:TOBNN5QAZHJozSyC9PDX5WaXVU

    • 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 binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

    • 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.

    • 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