DLL Sideloading: How Attackers Exploit Windows Trusted Processes and Defensive Countermeasures

HackMoN Ai

16d ago· 7 min readenInsight

Summary

DLL sideloading is a stealthy cyberattack technique where attackers exploit Windows' DLL search order to place malicious DLLs in locations checked before legitimate ones, causing trusted signed applications to unknowingly load and execute attacker payloads. The article explains how this technique (mapped to MITRE ATT&CK T1574.002) works, why it's increasingly used by ransomware groups and advanced persistent threats (APTs), and provides defensive strategies including secure DLL loading practices, monitoring for anomalous DLL loads, and application whitelisting.

Source

bskyDLL Sideloading: How Attackers Exploit Windows Trusted Processes and Defensive Countermeasuresundercodetesting.com

Key quotes

· 3 pulled

DLL sideloading is a stealthy exploitation technique that abuses the way Windows searches for and loads Dynamic-Link Libraries (DLLs), allowing attackers to execute malicious code under the guise of a legitimate, signed application.

By placing a malicious DLL with the same name and export structure as a legitimate DLL in a location the application checks first, the trusted binary unknowingly loads and executes the attacker's payload.

This technique, mapped to MITRE ATT&CK T1574.002, has been increasingly adopted by threat actors ranging from ransomware groups to advanced persistent threats (APTs).

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DLL Sideloading Unmasked: How Attackers Hijack Trusted Windows Processes and How You Can Stop Them + Video - "Undercode Testing": Monitor hackers like a pro.

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