General

  • Target

    https://github.com/enginestein/Virus-Collection/blob/main/Windows/Binaries/Ransomware

  • Sample

    241022-z8nb8sxarm

Malware Config

Targets

    • Target

      https://github.com/enginestein/Virus-Collection/blob/main/Windows/Binaries/Ransomware

    • Mimikatz

      mimikatz is an open source tool to dump credentials on Windows.

    • Troldesh, Shade, Encoder.858

      Troldesh is a ransomware spread by malspam.

    • Renames multiple (77) files with added filename extension

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

    • mimikatz is an open source tool to dump credentials on Windows

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • 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 user/profile data of web browsers

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

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Modifies WinLogon

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks