General

  • Target

    Agents Letter.exe

  • Size

    430KB

  • Sample

    221124-xzxs7sdf43

  • MD5

    2c27fdafaa47f61b79d8b5513c8e4d23

  • SHA1

    262e6cb688ad062bdde2b6702871a5a07e4409f4

  • SHA256

    6b1ee9252cc101156e585e7cd6c59ea3850a010c57a7f1b1915d5438cbc5b4de

  • SHA512

    d3fdfb89c23329e36a2c043a8159bf8816e2a0c8df432dc407f9c45f3c8b1f2c719c9a57c028ed7c81154c72fcb66147c223d25c73ef77a66a9114024444aa24

Malware Config

Targets

    • Target

      Agents Letter.exe

    • Size

      430KB

    • MD5

      2c27fdafaa47f61b79d8b5513c8e4d23

    • SHA1

      262e6cb688ad062bdde2b6702871a5a07e4409f4

    • SHA256

      6b1ee9252cc101156e585e7cd6c59ea3850a010c57a7f1b1915d5438cbc5b4de

    • SHA512

      d3fdfb89c23329e36a2c043a8159bf8816e2a0c8df432dc407f9c45f3c8b1f2c719c9a57c028ed7c81154c72fcb66147c223d25c73ef77a66a9114024444aa24

    • Snake Keylogger

      Keylogger and Infostealer first seen in November 2020.

    • Snake Keylogger payload

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix

Command and Control

    Credential Access

    Defense Evasion

    Execution

      Exfiltration

        Impact

          Initial Access

            Lateral Movement

              Privilege Escalation