General

  • Target

    avast_free_antivirus_setup_online.exe

  • Size

    256KB

  • Sample

    230403-fsc2saec7s

  • MD5

    e21655fcda61dca03f2095072453f5aa

  • SHA1

    f112d53fcf499afdfba4a4e42bee4b7718ea4c38

  • SHA256

    930c012fef382e7401e180cb1373312cb66e673a47585ff9db5cff35a73e31a8

  • SHA512

    3fb583360d2f9dc54b78126b04940a1057765b4812d2b4c6e81e73b4c39a4571c35b702be3a34b6ecf170765dfbdc7cd09cd5cba8ebbbbdca3e205097271357a

  • SSDEEP

    6144:WCfHrZae3GFqRQcMeh4WpywpjchNCPntebmP:WCfLZadcM24fRNGei

Malware Config

Targets

    • Target

      avast_free_antivirus_setup_online.exe

    • Size

      256KB

    • MD5

      e21655fcda61dca03f2095072453f5aa

    • SHA1

      f112d53fcf499afdfba4a4e42bee4b7718ea4c38

    • SHA256

      930c012fef382e7401e180cb1373312cb66e673a47585ff9db5cff35a73e31a8

    • SHA512

      3fb583360d2f9dc54b78126b04940a1057765b4812d2b4c6e81e73b4c39a4571c35b702be3a34b6ecf170765dfbdc7cd09cd5cba8ebbbbdca3e205097271357a

    • SSDEEP

      6144:WCfHrZae3GFqRQcMeh4WpywpjchNCPntebmP:WCfLZadcM24fRNGei

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Sets service image path in registry

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Windows security modification

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v6

Tasks