General

  • Target

    Halkbank_Ekstre_2024061918_088957_785452.xlxs.exe

  • Size

    1.9MB

  • Sample

    240618-xmhthsyeqn

  • MD5

    7b4c1ed22b968699059bb4717e2665a7

  • SHA1

    731e51b1a3d522ea391495271d977e0e4961f203

  • SHA256

    d72087da88129a3b1bce3505c119cb418f84bd68659eb33385546b9e33dddb4c

  • SHA512

    d0c89dd0b914991ab2eeb4de48f98c46f14888849bf9a116a902fb497ef2b65725e82f8ac8f465172d147d7a9ec6a0fb9ae829f138e0ec3579a79dee48ec03d7

  • SSDEEP

    12288:xthPA7R1brgevLbkgpco8BuB+VotGHNq82Qd+Y9J7O+aL229GgPlZqUXJctT:xY7R1YeDogpvB/ktJ2Qd99Q9OsJcx

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.oserfech.eu
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Epicoffice@2024

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      Halkbank_Ekstre_2024061918_088957_785452.xlxs.exe

    • Size

      1.9MB

    • MD5

      7b4c1ed22b968699059bb4717e2665a7

    • SHA1

      731e51b1a3d522ea391495271d977e0e4961f203

    • SHA256

      d72087da88129a3b1bce3505c119cb418f84bd68659eb33385546b9e33dddb4c

    • SHA512

      d0c89dd0b914991ab2eeb4de48f98c46f14888849bf9a116a902fb497ef2b65725e82f8ac8f465172d147d7a9ec6a0fb9ae829f138e0ec3579a79dee48ec03d7

    • SSDEEP

      12288:xthPA7R1brgevLbkgpco8BuB+VotGHNq82Qd+Y9J7O+aL229GgPlZqUXJctT:xY7R1YeDogpvB/ktJ2Qd99Q9OsJcx

    • 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

    • Adds Run key to start application

    • 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