Abusing Exported Functions and Exposed DCOM Interfaces for Pass-Thru Command Execution and Lateral Movement
Last Wednesday, I had some down time so I decided to hunt around in System32 to see if I could find anything of potential interest. I located a few DLL files that shared an interesting export function called OpenURL: While looking for a quick win, I wanted to see if anything could be invoked without much effort. Sure enough, url.dll allowed for the execution an HTML application (.hta) using these commands: rundll32.exe url.dll,OpenURL "local\path\to\harmless.hta" rundll32.exe url.dll,OpenURLA "local\path\to\harmless.hta" After a few more functional tests across platforms, I (prematurely) posted this on Twitter, and the initial feedback was incredibly fast, educational, and humbling. On one hand, I should have went through a few more test routines to understand what was actually happening under the hood prior to posting. Conversely, it was incredible to see the instant reaction from some of the best practitioners in the field who helped triage this in what seemed like a matter of minutes. Big thanks to @subTee, @r0wdy_, and @Hexacorn for their rapid analysis! In short, the HTA was invoked using the OpenURL function, allowing for pass-thru command execution and lateral movement.
FEATURES
EXPLORE BY TAGS
SIMILAR TOOLS
A collection of Python scripts for password spraying attacks against Lync/S4B & OWA, featuring Atomizer, Vaporizer, Aerosol, and Spindrift tools.
Parrot Security OS is a comprehensive, secure, and customizable operating system for cybersecurity professionals, offering over 600+ tools and utilities for red and blue team operations.
Explore the top million websites, ranked by referring subnets, and gain insights into online influence and popularity.
A CVE compliant archive of public exploits and corresponding vulnerable software, and a categorized index of Internet search engine queries designed to uncover sensitive information.
A digital archive of the internet, allowing users to capture and browse archived web pages.
A suite of tools for Wi-Fi network security assessment and penetration testing.
AHHHZURE is an automated deployment script that creates vulnerable Azure cloud lab environments for offensive security training and cloud penetration testing practice.
SharpShares efficiently enumerates and maps network shares and resolves names within a domain.
PINNED
Proton Pass is a cross-platform password manager that provides encrypted storage, password generation, and security monitoring features with integrated 2FA and dark web monitoring capabilities.
NordVPN is a commercial VPN service that encrypts internet connections and hides IP addresses through a global network of servers, featuring integrated threat protection and multi-device support.
Fractional CISO service that helps B2B companies implement security leadership to win enterprise deals, achieve compliance, and develop strategic security programs.
Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.
Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.
DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.