Resubmissions

21-06-2024 12:01

240621-n67gjsyerf 8

18-06-2024 12:38

240618-pvbq6stdrg 10

General

  • Target

    F24_023.pdf.js

  • Size

    2KB

  • Sample

    240618-pvbq6stdrg

  • MD5

    d07b33862ae532913f04117edb1c252c

  • SHA1

    b981c86e0a41aa9a298a3436b14c6c86d5c6dae3

  • SHA256

    e84a0e1c0a65c25debdef56aaab3c45130629fc05a93658f6ef63396ac93ba9d

  • SHA512

    5ea8f391af3eb1b2c512b230406f2c14dc08b298379ffcc5aabdbef40c1246d616c4177ff99cc6b2833c061ee0b9e475d8bc681ada72283bdffb246712b9c1ab

Malware Config

Targets

    • Target

      F24_023.pdf.js

    • Size

      2KB

    • MD5

      d07b33862ae532913f04117edb1c252c

    • SHA1

      b981c86e0a41aa9a298a3436b14c6c86d5c6dae3

    • SHA256

      e84a0e1c0a65c25debdef56aaab3c45130629fc05a93658f6ef63396ac93ba9d

    • SHA512

      5ea8f391af3eb1b2c512b230406f2c14dc08b298379ffcc5aabdbef40c1246d616c4177ff99cc6b2833c061ee0b9e475d8bc681ada72283bdffb246712b9c1ab

    • Modifies visibility of file extensions in Explorer

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

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

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads user/profile data of web browsers

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

    • UPX packed file

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

    • Accesses Microsoft Outlook accounts

    • Accesses Microsoft Outlook profiles

    • 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.

MITRE ATT&CK Enterprise v15

Tasks