Overview

overview

8

Static

static

1

avast_one_free.exe

windows10-2004-x64

6

avast_one_free.exe

windows11-ltsc_2024-x64

8

Sharing

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General

  • Target
    avast_one_free.exe
  • Size 1.7MB
  • Sample260930-3b6n4awdpc
  • SHA256 4d5902e860f17b8db3338bcfeaf05091478015de1a7940fca821711599289905
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
bootkitdiscoverypersistence

Malware Config

Targets

    • Target
      avast_one_free.exe
    • Size 1.7MB
    • SHA256 4d5902e860f17b8db3338bcfeaf05091478015de1a7940fca821711599289905
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    bootkitdiscoverypersistence

    • Uses Session Manager for persistence

      Creates Session Manager registry key to run executable early in system boot.

      persistence

    • Checks for any installed AV software in registry

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Writes to the Master Boot Record (MBR)

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

      bootkitpersistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks