General

  • Target

    avast_free_antivirus_setup_online.exe

  • Size

    256KB

  • Sample

    230203-tp31pabe7z

  • MD5

    2c0e37a5445b4b035f1b0cca50e7d60f

  • SHA1

    9819510b7d8bc6eb9c70f26aeb4063413513575b

  • SHA256

    c70a09aa15fb87f998f6dcbafe881eb7f0af3d07b08729ad584a802542994ccd

  • SHA512

    e2cbf892b509bab0e56385c80bbd011a9d892af42de5b192cc91d31b9d50bd8ab67aba5e9c88b57bb6c467da4421435e9b5392bdfc2f8a5d30244f0cfa7eb3cc

  • SSDEEP

    6144:oCfHrZae3GFqRQcMeh4WpywpjchNCPnoeb:oCfLZadcM24fRN3e

Malware Config

Targets

    • Target

      avast_free_antivirus_setup_online.exe

    • Size

      256KB

    • MD5

      2c0e37a5445b4b035f1b0cca50e7d60f

    • SHA1

      9819510b7d8bc6eb9c70f26aeb4063413513575b

    • SHA256

      c70a09aa15fb87f998f6dcbafe881eb7f0af3d07b08729ad584a802542994ccd

    • SHA512

      e2cbf892b509bab0e56385c80bbd011a9d892af42de5b192cc91d31b9d50bd8ab67aba5e9c88b57bb6c467da4421435e9b5392bdfc2f8a5d30244f0cfa7eb3cc

    • SSDEEP

      6144:oCfHrZae3GFqRQcMeh4WpywpjchNCPnoeb:oCfLZadcM24fRN3e

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • 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