Extracted

• • Target

    https://github.com/UIM-SEC/ransomware-samples/blob/master/katyusha.zip

  Score

  10^/10

  mimikatzwannacrydefense_evasiondiscoveryexecutionimpactpersistencephishingransomwarespywarestealerworm

  • Mimikatz

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

    mimikatz

  • Mimikatz family

    mimikatz

  • Wannacry

    WannaCry is a ransomware cryptoworm.

    ransomwarewormwannacry

  • Wannacry family

    wannacry

  • Deletes shadow copies

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution

  • Renames multiple (3117) files with added filename extension

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

    ransomware

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

  • Downloads MZ/PE file

  • A potential corporate email address has been identified in the URL: [email protected]

    phishing

  • Drops startup file

  • Executes dropped EXE

  • Loads dropped DLL

  • Modifies file permissions

    discovery

  • 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

  • Creates a large amount of network flows

    This may indicate a network scan to discover remotely running services.

    discovery

  • Enumerates connected drives

    Attempts to read the root path of hard drives other than the default C: drive.

  • File and Directory Permissions Modification: Windows File and Directory Permissions Modification

    defense_evasion

  • Legitimate hosting services abused for malware hosting/C2

  • Sets desktop wallpaper using registry

    ransomware
  behavioral1