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General

  • Target

    03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7

  • Size

    616KB

  • Sample

    240504-w6klsaeg4v

  • MD5

    e94a07c319a7593e95199532bbdb5c99

  • SHA1

    90cb1963b46ec8b51b27e932492c73f15496414a

  • SHA256

    03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7

  • SHA512

    72d36117dcca4652e63ee847ab9a7413201ff855f0b9a906bc48d4cc90310a779a214b02a1b679cfacaea82206ee4b5d8bad99955ed36415543b0678d612ebdf

  • SSDEEP

    12288:RVBob/oNLSVz968w+DZGjvBPW6HdT81GSwYkfJLO5L:RVmLBDZf6H2XwY4O5L

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot6813550597:AAGaY-9sRuklR7Vaew4j9pvwVq-T3Fmj5Jg/

Targets

    • Target

      03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7

    • Size

      616KB

    • MD5

      e94a07c319a7593e95199532bbdb5c99

    • SHA1

      90cb1963b46ec8b51b27e932492c73f15496414a

    • SHA256

      03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7

    • SHA512

      72d36117dcca4652e63ee847ab9a7413201ff855f0b9a906bc48d4cc90310a779a214b02a1b679cfacaea82206ee4b5d8bad99955ed36415543b0678d612ebdf

    • SSDEEP

      12288:RVBob/oNLSVz968w+DZGjvBPW6HdT81GSwYkfJLO5L:RVmLBDZf6H2XwY4O5L

    • AgentTesla

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

    • UAC bypass

    • Windows security bypass

    • Detect packed .NET executables. Mostly AgentTeslaV4.

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

    • Detects executables packed with or use KoiVM

    • 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.

    • Windows security modification

    • Checks whether UAC is enabled

    • 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