General

  • Target
    1888ecf4e90f02ecaaefdb3624825fa2.bin
  • Size 264KB
  • Sample250414-bfazfawmx2
  • SHA256 c02413c8d2f6cf20728cb4ff088d73d87e592d0f80d3b7ad3ccc8bd05ad6dfa7
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      a78fa1ecadc46870c17e458ab427bad6586b74c7d3e8472f6d8448832ccb20f1.exe
    • Size 497KB
    • SHA256 a78fa1ecadc46870c17e458ab427bad6586b74c7d3e8472f6d8448832ccb20f1
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Rhysida ransomware

    • Rhysida

      Rhysida is a ransomware that is written in C++ and discovered in 2023.

    • Rhysida family

    • Clears Windows event logs

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (9766) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Drops startup file

    • Reads user/profile data of web browsers

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

    • Hide Artifacts: Hidden Window

      Windows that would typically be displayed when an application carries out an operation can be hidden.

    • Indicator Removal: Clear Persistence

      Clear artifacts associated with previously established persistence like scheduletasks on a host.

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks