General

  • Target

    DSR0987678900000.doc_1.gz.zip

  • Size

    642KB

  • Sample

    240926-qsynlazbjn

  • MD5

    8607524aef8f5de6dddafb6cc175fef1

  • SHA1

    72ee215950350614df3a483024ddac13805769f0

  • SHA256

    83095ad1de7f3b4c47d9dc04dad7b2a564d922a225167d0fe09806df7323ee41

  • SHA512

    6a7e8d02c64346b0275bbf465ce33b6fa12ce7a20dfa072e3a2353e23cc9d7201b9fad79f7820ee58de00f50fcfaae18a0394103823cc97c071f76a87341e284

  • SSDEEP

    12288:SZNKhSWwgkOtZelg/8H/1SHdwPl/qhe3RYAALxAs4ceXCZLZHtE:SZU8WwFOtag/8f1U2l/qs6Ks49CbtE

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.antoniomayol.com:21
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    cMhKDQUk1{;%

Targets

    • Target

      DSR0987678900000.exe

    • Size

      3.6MB

    • MD5

      780e6f2c7b7d9742a94b9e2da18b58fd

    • SHA1

      275324c7b0b61ddc600df5c690ea35f780114ed8

    • SHA256

      8a5e154d88d238dc9a6970558ffd02bbd00dd786a0e7d51c3cea80badeb78e7e

    • SHA512

      496f488ec5f619991b4ec8fd5bdde987315f1c2d18e5158e44d336569ab5c46cdf1d055d5e17c86afea669e1b6480b4bd73af5f5c403af67e415acecee7e8290

    • SSDEEP

      24576:b1qb6oWgPEfagb8P1Wil/q4GEsYR+xtr8:Ib6/gP/1GEsnr8

    • AgentTesla

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

    • UAC bypass

    • Windows security bypass

    • Looks for VirtualBox Guest Additions in registry

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • 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.

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks