Resubmissions

16/03/2022, 08:41

220316-klxj3abce210

16/03/2022, 08:37

220316-kjjv7abca88

General

  • Target
    PO 121873.xlsx
  • Size 713KB
  • Sample220316-klxj3abce2
  • SHA256 2f5b78358322f5fd8c560d8a223282016decea4d3f74f5145283d3f1ec764ebc
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    transportescascao.com

  • Port

    587

  • Password

    CasMan123*

Targets

    • Target
      PO 121873.xlsx
    • Size 713KB
    • SHA256 2f5b78358322f5fd8c560d8a223282016decea4d3f74f5145283d3f1ec764ebc
    • MD5 SHA1 SHA512
    • AgentTesla

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • 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.

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks