General

  • Target

    https://github.com/pankoza2-pl/malwaredatabase-old/raw/refs/heads/main/Covid29-Ransomware/Covid29%20Ransomware.zip

  • Sample

    241017-pqjk8axdmf

Malware Config

Targets

    • Target

      https://github.com/pankoza2-pl/malwaredatabase-old/raw/refs/heads/main/Covid29-Ransomware/Covid29%20Ransomware.zip

    • Chaos

      Ransomware family first seen in June 2021.

    • Chaos Ransomware

    • UAC bypass

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Modifies boot configuration data using bcdedit

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

    • Disables Task Manager via registry modification

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

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

    • Sets desktop wallpaper using registry

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks