Extracted

• • Target
    https://vx-underground.org/Builders/Yashma%20Ransomware

  Score

  10^/10

  defense_evasiondiscoveryevasionexecutionchaosimpactpersistenceprivilege_escalationransomwarespywarestealer

  • Chaos Ransomware

  • Family: Chaos

    Ransomware family first seen in June 2021.

    ransomwarechaos

  • Deletes shadow copies

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution

  • Modifies boot configuration data using bcdedit

    ransomwareevasion

  • Deletes backup catalog

    Uses wbadmin.exe to inhibit system recovery.

    ransomware

  • Disables Task Manager via registry modification

    defense_evasion

  • Checks computer location settings

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

  • Creates a file in the Startup directory

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    persistenceprivilege_escalation

  • Executes dropped EXE

  • Reads user/profile data of web browsers

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

    spywarestealer

  • Adds Run key to start application

    persistence

  • Contacts third-party web service commonly abused for C2

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Drops desktop.ini file(s)

  • Sets desktop wallpaper using registry

    ransomware
  behavioral1