General

  • Target

    4fe816d6fb44ced8cb1aa1fd3f5e0430b1570a11dcf42b3cc446b877a88a49d1

  • Size

    4.0MB

  • Sample

    220320-emf1taggek

  • MD5

    2392b71ffb83ccb01cd14ce2b291b1e3

  • SHA1

    55393a06357cb58efb6b810593b0ee0d41f5a7fa

  • SHA256

    4fe816d6fb44ced8cb1aa1fd3f5e0430b1570a11dcf42b3cc446b877a88a49d1

  • SHA512

    b7c1cf754dacf9965146899c61538737ef067b39e3c35b707373f7745a5bbc1d3c0423dd27690a732278eb24207d52c6f72718a1ff95a1be0bc5203f959e8249

Malware Config

Targets

    • Target

      4fe816d6fb44ced8cb1aa1fd3f5e0430b1570a11dcf42b3cc446b877a88a49d1

    • Size

      4.0MB

    • MD5

      2392b71ffb83ccb01cd14ce2b291b1e3

    • SHA1

      55393a06357cb58efb6b810593b0ee0d41f5a7fa

    • SHA256

      4fe816d6fb44ced8cb1aa1fd3f5e0430b1570a11dcf42b3cc446b877a88a49d1

    • SHA512

      b7c1cf754dacf9965146899c61538737ef067b39e3c35b707373f7745a5bbc1d3c0423dd27690a732278eb24207d52c6f72718a1ff95a1be0bc5203f959e8249

    • MassLogger

      Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

    • MassLogger Main Payload

    • Modifies WinLogon for persistence

    • Checks computer location settings

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

    • Drops startup file

    • 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 Enterprise v6

Tasks