General

  • Target

    vbc.exe

  • Size

    783KB

  • Sample

    211019-s8nvfagbc3

  • MD5

    41c7bfc7333edd0ad3ede2cc7ef23ebe

  • SHA1

    880b1892d082178a113b6af32d81339c0255d634

  • SHA256

    816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

  • SHA512

    f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.xxltrucck.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    vFguU*i0

Targets

    • Target

      vbc.exe

    • Size

      783KB

    • MD5

      41c7bfc7333edd0ad3ede2cc7ef23ebe

    • SHA1

      880b1892d082178a113b6af32d81339c0255d634

    • SHA256

      816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

    • SHA512

      f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

    • AgentTesla

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

    • AgentTesla Payload

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • 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.

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook profiles

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks