Extracted

• • Target

    BlsCrn.exe

  • Size

    68KB

  • MD5

    8d126e89c071719bc4b36f4551024ab5

  • SHA1

    e0b3bb8de47da697f029242fe45f0f861c2f4867

  • SHA256

    c75462e36e1a9b989cf0a0330219667d463daa7e51666ac069046969cacaaa1f

  • SHA512

    e8637e1eae28ebdfdedd2cc0027a431cae601df154f8dbd0035db5c262402038c6d592b61662dbd537c42b54a56a14812f5046f5090c2c645fd6c18d889ffe49

  • SSDEEP

    384:2mvY5+dSd+cagoEb/S7sGEHeTS+yTifPQC4ItobbxW+e0ewd0SyrQfBkJ5hZf6CZ:2F5urgNOyWYCGwSVB2hZPA69km

  Score

  10^/10

  wannacrycredential_accessdefense_evasiondiscoveryexecutionimpactpersistenceprivilege_escalationransomwarespywarestealertrojanworm

  • Modifies WinLogon for persistence

    persistence

  • Suspicious use of NtCreateUserProcessOtherParentProcess

  • Wannacry

    WannaCry is a ransomware cryptoworm.

    ransomwarewormwannacry

  • Wannacry family

    wannacry

  • Deletes shadow copies

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution

  • Downloads MZ/PE file

  • Drops file in Drivers directory

  • Modifies RDP port number used by Windows

  • Sets service image path in registry

    persistence

  • Checks BIOS information in registry

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings

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

  • Credentials from Password Stores: Windows Credential Manager

    Suspicious access to Credentials History.

    credential_accessstealer

  • Drops startup file

  • Event Triggered Execution: Component Object Model Hijacking

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    persistenceprivilege_escalation

  • Executes dropped EXE

  • Impair Defenses: Safe Mode Boot

    defense_evasion

  • 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

  • Checks installed software on the system

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery

  • Checks whether UAC is enabled

    defense_evasiontrojan

  • 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

  • Boot or Logon Autostart Execution: Authentication Package

    Suspicious Windows Authentication Registry Modification.

    persistenceprivilege_escalation

  • Drops file in System32 directory

  • Sets desktop wallpaper using registry

    ransomware
  behavioral1behavioral2