General

  • Target

    avast_premium_security_setup_online.exe

  • Size

    262KB

  • Sample

    230315-gfgpwabg64

  • MD5

    6aac818cd4aefcbd585223810368f216

  • SHA1

    e4152454a29d8a4f9f56d72315017ba89ac22afe

  • SHA256

    0184869bca784bfb1211f0e9c92e82a4bae002b29c8eea7073e8f797b1b52439

  • SHA512

    9909f763443ea2d220833f832be3c8884228fa3e6225951d21ebd9b14f4a82ab0e911a720720c12c7805d50efd5890138bfcf306a638b728ddf573e1986f5cae

  • SSDEEP

    3072:G3FKK+qOLpWZOpHwOnxjhI1a29nMGkvmUCDzTObdPnF5od1Jc+mTSC/REMz5hMWF:G9+qOLoaXjhenMGmmUEebVF+uoniy6tT

Malware Config

Targets

    • Target

      avast_premium_security_setup_online.exe

    • Size

      262KB

    • MD5

      6aac818cd4aefcbd585223810368f216

    • SHA1

      e4152454a29d8a4f9f56d72315017ba89ac22afe

    • SHA256

      0184869bca784bfb1211f0e9c92e82a4bae002b29c8eea7073e8f797b1b52439

    • SHA512

      9909f763443ea2d220833f832be3c8884228fa3e6225951d21ebd9b14f4a82ab0e911a720720c12c7805d50efd5890138bfcf306a638b728ddf573e1986f5cae

    • SSDEEP

      3072:G3FKK+qOLpWZOpHwOnxjhI1a29nMGkvmUCDzTObdPnF5od1Jc+mTSC/REMz5hMWF:G9+qOLoaXjhenMGmmUEebVF+uoniy6tT

    • 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 Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

3
T1060

Bootkit

1
T1067

Defense Evasion

Modify Registry

4
T1112

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Security Software Discovery

1
T1063

Query Registry

5
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Tasks