General

  • Target

    Sigmanly_5f3ecd02a94cec2b62bfecd79f5a1d98

  • Size

    497KB

  • Sample

    250413-qcldbswmt8

  • MD5

    5f3ecd02a94cec2b62bfecd79f5a1d98

  • SHA1

    2cd65d6d0cb10b8d061ee33133f0f98f86917265

  • SHA256

    b55ecbddcbed916481ad537807cd3e33cb71814be6ce8e03eb63b629ccb8c692

  • SHA512

    254949d3932a915394dec0eca359291baa8963e0cab55d28af02c678ce9841a3dad9b2d28e911f51655d8a52cf7d7379b446c0a2917b6e083abf95a1aa68dfee

  • SSDEEP

    6144:rFoCbN9uRhQW8HnuYqWrJhN7L6aMFNYkS+D5gtuMf9opagj7T:IqnTp7N78Y5e5gUG9o/

Malware Config

Targets

    • Target

      Sigmanly_5f3ecd02a94cec2b62bfecd79f5a1d98

    • Size

      497KB

    • MD5

      5f3ecd02a94cec2b62bfecd79f5a1d98

    • SHA1

      2cd65d6d0cb10b8d061ee33133f0f98f86917265

    • SHA256

      b55ecbddcbed916481ad537807cd3e33cb71814be6ce8e03eb63b629ccb8c692

    • SHA512

      254949d3932a915394dec0eca359291baa8963e0cab55d28af02c678ce9841a3dad9b2d28e911f51655d8a52cf7d7379b446c0a2917b6e083abf95a1aa68dfee

    • SSDEEP

      6144:rFoCbN9uRhQW8HnuYqWrJhN7L6aMFNYkS+D5gtuMf9opagj7T:IqnTp7N78Y5e5gUG9o/

    • 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 (9711) 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