General

  • Target

    a0d4d52885b654cbfeefd194359936072133519c2bc7e8f68b7b668e59c67b94.exe

  • Size

    497KB

  • Sample

    241003-caabdsyclm

  • MD5

    c43f12b8330643c72d21bad3b6cfcf82

  • SHA1

    f453f42de8151323472dbe35b5d48084e0012216

  • SHA256

    a0d4d52885b654cbfeefd194359936072133519c2bc7e8f68b7b668e59c67b94

  • SHA512

    987ce1e4dd8f69100b1514a1c9b0a2abad5fa028dc9a22532fb088308596e8f372d30cb89f140927c459421febe762cfe3668ec21b9deb546e7a50266d605efe

  • SSDEEP

    6144:UFoCbN9uRh5W8iZuYtWrJhN7L6aMFNCk0Y+sPgtuMf9opaMPdZXT:qvZTs7N78CrZsPgUG9oDlZ

Malware Config

Targets

    • Target

      a0d4d52885b654cbfeefd194359936072133519c2bc7e8f68b7b668e59c67b94.exe

    • Size

      497KB

    • MD5

      c43f12b8330643c72d21bad3b6cfcf82

    • SHA1

      f453f42de8151323472dbe35b5d48084e0012216

    • SHA256

      a0d4d52885b654cbfeefd194359936072133519c2bc7e8f68b7b668e59c67b94

    • SHA512

      987ce1e4dd8f69100b1514a1c9b0a2abad5fa028dc9a22532fb088308596e8f372d30cb89f140927c459421febe762cfe3668ec21b9deb546e7a50266d605efe

    • SSDEEP

      6144:UFoCbN9uRh5W8iZuYtWrJhN7L6aMFNCk0Y+sPgtuMf9opaMPdZXT:qvZTs7N78CrZsPgUG9oDlZ

    • Detect Rhysida ransomware

    • Rhysida

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

    • Clears Windows event logs

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (8145) 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 v15

Tasks