General

  • Target
    ExLoader_Installer.exe
  • Size 22.2MB
  • Sample260811-drpm3scb86
  • SHA256 59d78963e8f56b25b95c18d5c672789ddb62ee0e186eda49250cef99edad78b9
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      ExLoader_Installer.exe
    • Size 22.2MB
    • SHA256 59d78963e8f56b25b95c18d5c672789ddb62ee0e186eda49250cef99edad78b9
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Downloads MZ/PE file

    • Uses Session Manager for persistence

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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

    • 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.

    • Contacts third-party web service commonly abused for C2

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

    • Enumerates connected drives

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

    • Looks up external IP address via web service

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

    • 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 Enterprise v16

Tasks