{"id":144994,"date":"2005-05-01T00:00:00","date_gmt":"2005-05-01T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/worm-origin-identification-using-random-moonwalks\/"},"modified":"2018-10-16T20:06:02","modified_gmt":"2018-10-17T03:06:02","slug":"worm-origin-identification-using-random-moonwalks","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/worm-origin-identification-using-random-moonwalks\/","title":{"rendered":"Worm Origin Identification Using Random Moonwalks"},"content":{"rendered":"<div class=\"asset-content\">\n<p>We propose a novel technique that can determine both the host responsible for originating a propagating worm attack and the set of attack flows that make up the ini-tial stages of the attack tree via which the worm infected successive generations of victims. We argue that knowl-edge of both is important for combating worms: knowl-edge of the origin supports law enforcement, and knowledge of the causal flows that advance the attack supports diag-nosis of how network defenses were breached. Our tech-nique exploits the &#8220;wide tree&#8221; shape of a worm propagation emanating from the source by performing random &#8220;moon-walks&#8221; backward in time along paths of flows. Correlating the repeated walks reveals the initial causal flows, thereby aiding in identifying the source. Using analysis, simula-tion, and experiments with real world traces, we show how the technique works against both today&#8217;s fast propagating worms and stealthy worms that attempt to hide their attack flows among background traffic.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We propose a novel technique that can determine both the host responsible for originating a propagating worm attack and the set of attack flows that make up the ini-tial stages of the attack tree via which the worm infected successive generations of victims. We argue that knowl-edge of both is important for combating worms: knowl-edge [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"IEEE Symposium on Security and Privacy","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"IEEE Symposium on Security and Privacy","msr_doi":"","msr_arxiv_id":"","msr_s2_paper_id":"","msr_mag_id":"","msr_pubmed_id":"","msr_other_authors":"Vyas Sekar, David A. Maltz, Michael K. 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