Overview

overview

8

Static

static

1

avast_free...2).exe

windows10-2004-x64

8

avast_free...2).exe

windows11-ltsc_2024-x64

6

Sharing

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General

  • Target
    avast_free_antivirus_setup_online(2).exe
  • Size 245KB
  • Sample260811-qlg29stemd
  • SHA256 6be180ea9a978907b1f39e54a6360404a094d59c21e4ebb1fcb456aef0ff4859
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
bootkitdiscoverypersistence

Malware Config

Targets

    • Target
      avast_free_antivirus_setup_online(2).exe
    • Size 245KB
    • SHA256 6be180ea9a978907b1f39e54a6360404a094d59c21e4ebb1fcb456aef0ff4859
    • 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

    • Downloads MZ/PE file

    • 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