General

  • Target

    https://download.pdfforge.org/download/pdfcreator/PDFCreator-stable

  • Sample

    230418-qn646sdd7s

Malware Config

Targets

    • Target

      https://download.pdfforge.org/download/pdfcreator/PDFCreator-stable

    • BazarBackdoor

      Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.

    • Bazar/Team9 Backdoor payload

    • Downloads MZ/PE file

    • Office macro that triggers on suspicious action

      Office document macro which triggers in special circumstances - often malicious.

    • Registers new Print Monitor

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Registers COM server for autorun

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v6

Tasks