Creates a file in the Startup directory

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

Disables automatic submission of suspicious files to Microsoft by Windows Defender

Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.

Loads dropped DLL

Prevents Microsoft Defender from scanning certain paths by adding an exclusion.

Uses the Powershell Add-MpPreference cmdlet to exclude paths from being scanned by Microsoft Defender.

Reads user/profile data of web browsers

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

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.

UPX packed file

Detects executables packed with UPX/modified UPX open source packer.