Combatting Incident Responders with Apache mod_rewrite

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10 September 2025

Any phishing campaign involving an active incident response element usually requires some evasive steps to prolong its longevity. This often includes being stealthier, performing anti-forensics actions, or avoiding certain tradecraft altogether. Phishing is no different, and is often the most ‘vulnerable’ part of a campaign from an active IR perspective. Using a distributed infrastructure built with independent components helps reduce the risk of the overall architecture being blocked, but individual phishing campaigns are likely to be caught and blocked throughout the duration. The longer we can stretch out the usability of each of those campaigns, the better our chances of gaining access. Using Apache mod_rewrite rules, we can rewrite potential incident responder or security appliance requests to an innocuous website or the target’s real website. While the methods discussed below won’t stave off a concerted investigation, it will hopefully make the malicious website pass the ‘sniff test’ with recipients and lower level help desk or incident responders. It’s important to note that these techniques could prevent valid phishing victims from reaching your malicious website. You will need to weigh the risks of losing out on potential clicks against the risk of being detected.