General

  • Target
    Internet Download Manager 6.43 Build 9 Multilingual + Retail [FileCR].zip
  • Size 23.8MB
  • Sample260819-ee2ybawdkf
  • SHA256 3aa21ad0c17d2611cb02a52f23a69517d285ce882c596f2731f08c0e5562fe51
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/downloader/versions.xml

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/winrar/winrar-x64-723.exe

Targets

    • Target
      Internet Download Manager 6.43 Build 9 Multilingual + Retail [FileCR].zip
    • Size 23.8MB
    • SHA256 3aa21ad0c17d2611cb02a52f23a69517d285ce882c596f2731f08c0e5562fe51
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Blocks application from running via registry modification

      Adds application to list of disallowed applications.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Disables cmd.exe use via registry modification

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • A potential corporate email address has been identified in the URL: [email protected]

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • 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

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Drops Chrome extension

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Discovers running processes

      Running process information can be used to identify security tools or plan follow-on actions.

    • Drops file in System32 directory

    • Executes a VBScript file via the Windows Script Host.

MITRE ATT&CK Enterprise v16

Tasks