Resubmissions

16-03-2022 08:41

220316-klxj3abce2 10

16-03-2022 08:37

220316-kjjv7abca8 8

General

  • Target

    PO 121873.xlsx

  • Size

    713KB

  • Sample

    220316-klxj3abce2

  • MD5

    9f2cf851a66d5ec3520dab2364619890

  • SHA1

    cf6184531e30b05d1e5565d4626441c757240aa5

  • SHA256

    2f5b78358322f5fd8c560d8a223282016decea4d3f74f5145283d3f1ec764ebc

  • SHA512

    1da16064e04dcddd44e49cb4973a407c9502dbbe23d3247322c3114329994799219c7244bd4876bf9f89b1fe3cc7d6366704cb944e30bf56b5b6e6d7bf19230b

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    transportescascao.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    CasMan123*

Targets

    • Target

      PO 121873.xlsx

    • Size

      713KB

    • MD5

      9f2cf851a66d5ec3520dab2364619890

    • SHA1

      cf6184531e30b05d1e5565d4626441c757240aa5

    • SHA256

      2f5b78358322f5fd8c560d8a223282016decea4d3f74f5145283d3f1ec764ebc

    • SHA512

      1da16064e04dcddd44e49cb4973a407c9502dbbe23d3247322c3114329994799219c7244bd4876bf9f89b1fe3cc7d6366704cb944e30bf56b5b6e6d7bf19230b

    • 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