General

  • Target

    2025-03-18_7605fb5c749eeea0b1b27fdaad78051c_wannacry

  • Size

    137KB

  • Sample

    250318-b4m9nsstaw

  • MD5

    7605fb5c749eeea0b1b27fdaad78051c

  • SHA1

    28388bf016af085bbcbacf8c516853942f6ec8d3

  • SHA256

    466a92e378a95752870abddd6af278fba89c5fef2cb3adfe2c4c114b9bd7cd93

  • SHA512

    1a3780652e092bd0be5c45cf034b2d0737324009c4d7d74e5cca193f75f285be85fa1631a68c6955566206dc3d51ba2dab9c4acfc74f9652ed2c04976ae3ee54

  • SSDEEP

    3072:pc98R9CAHAcKf55kNONO4vIfUye3tYsfNL1sLp:pc9cxhipvjt3yiW

Malware Config

Targets

    • Target

      2025-03-18_7605fb5c749eeea0b1b27fdaad78051c_wannacry

    • Size

      137KB

    • MD5

      7605fb5c749eeea0b1b27fdaad78051c

    • SHA1

      28388bf016af085bbcbacf8c516853942f6ec8d3

    • SHA256

      466a92e378a95752870abddd6af278fba89c5fef2cb3adfe2c4c114b9bd7cd93

    • SHA512

      1a3780652e092bd0be5c45cf034b2d0737324009c4d7d74e5cca193f75f285be85fa1631a68c6955566206dc3d51ba2dab9c4acfc74f9652ed2c04976ae3ee54

    • SSDEEP

      3072:pc98R9CAHAcKf55kNONO4vIfUye3tYsfNL1sLp:pc9cxhipvjt3yiW

    • Chaos

      Ransomware family first seen in June 2021.

    • Chaos Ransomware

    • Chaos family

    • 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)

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks