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Resubmissions

23/10/2022, 09:03

221023-k1fj4ahehj 8

06/09/2022, 18:05

220906-wpnbcahag2 8

General

  • Target

    avg_secure_browser_setup.exe

  • Size

    815KB

  • Sample

    220906-wpnbcahag2

  • MD5

    a0ba2bd5a6c7ca976280ce1c5adc8e02

  • SHA1

    5b348fe4c92c249274277307b7bcc867518e2fd9

  • SHA256

    285f523bfc4d03efd65c514c6ffb9802afe2bebf55c7c4a5043c3cc6c1a6d012

  • SHA512

    b2558496201c818e6a193092a1e67cc2e8a3964b4074e76471e6572ba5c6ae127675e9a4db9e2678ee63e8e0ffa31dc5a5681be11423bc2b7e4c75b087142b88

  • SSDEEP

    24576:DfY/y/93nxvj+eT4mhiNqoxOUjfJ6sins:Deg3xvjfd1oxOUjfJb1

Malware Config

Targets

    • Target

      avg_secure_browser_setup.exe

    • Size

      815KB

    • MD5

      a0ba2bd5a6c7ca976280ce1c5adc8e02

    • SHA1

      5b348fe4c92c249274277307b7bcc867518e2fd9

    • SHA256

      285f523bfc4d03efd65c514c6ffb9802afe2bebf55c7c4a5043c3cc6c1a6d012

    • SHA512

      b2558496201c818e6a193092a1e67cc2e8a3964b4074e76471e6572ba5c6ae127675e9a4db9e2678ee63e8e0ffa31dc5a5681be11423bc2b7e4c75b087142b88

    • SSDEEP

      24576:DfY/y/93nxvj+eT4mhiNqoxOUjfJ6sins:Deg3xvjfd1oxOUjfJb1

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies Installed Components in the registry

    • Registers COM server for autorun

    • Sets file execution options in registry

    • 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.

    • Deletes itself

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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.

    • Checks whether UAC is enabled

    • Writes to the Master Boot Record (MBR)

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

MITRE ATT&CK Enterprise v6

Tasks