General

  • Target

    c9990a254a3a012f98baa220b41b4393_wannacry_JC.exe

  • Size

    234KB

  • Sample

    230828-x2me9afb57

  • MD5

    c9990a254a3a012f98baa220b41b4393

  • SHA1

    34902386383b79f02cfaf5e6afa3fe893f808790

  • SHA256

    bd5fe7a67927154f21008bc0867cdafceb7f89c97e88331fcac0578bcc84e4ae

  • SHA512

    9ec25eb998c29536add63e71e2ffd129b66a55b2f39e7ee761a09c8b85e5cadac32b9915ecab6389f7601bc59662d4e34553fa703219fa95ea75f168efbd7ad8

  • SSDEEP

    3072:ZOtEq9U+Aq0swSyIrF6LQpfdxq35oa7tsLAr+y9eS0HOXDWivrZ:Z6Eq9Bd+a6oa7wseEi4r

Malware Config

Targets

    • Target

      c9990a254a3a012f98baa220b41b4393_wannacry_JC.exe

    • Size

      234KB

    • MD5

      c9990a254a3a012f98baa220b41b4393

    • SHA1

      34902386383b79f02cfaf5e6afa3fe893f808790

    • SHA256

      bd5fe7a67927154f21008bc0867cdafceb7f89c97e88331fcac0578bcc84e4ae

    • SHA512

      9ec25eb998c29536add63e71e2ffd129b66a55b2f39e7ee761a09c8b85e5cadac32b9915ecab6389f7601bc59662d4e34553fa703219fa95ea75f168efbd7ad8

    • SSDEEP

      3072:ZOtEq9U+Aq0swSyIrF6LQpfdxq35oa7tsLAr+y9eS0HOXDWivrZ:Z6Eq9Bd+a6oa7wseEi4r

    • Chaos

      Ransomware family first seen in June 2021.

    • Chaos Ransomware

    • 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

    • 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.

    • Adds Run key to start application

    • Drops desktop.ini file(s)

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks