copyright 2009 trend micro inc. talos: building world-wide domain reputation ray liao...
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Copyright 2009 Trend Micro Inc.
Talos:Building World-Wide Domain ReputationRay Liao ([email protected])
Jerry J Wu ([email protected])
Trend Micro Inc.04/11/2023
Talos . External
Copyright 2009 Trend Micro Inc.Classification 04/11/2023 2
Copyright 2009 Trend Micro Inc.
Types of Analysis
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Talos . External
TALOS
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Goal
• Comprehensive domain reputation – High risk domains– Legitimate domains – Not compromised sites
• Rate by intention
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Talos . External
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How?
• Domain Snapshot
• Domain History
• Analysis– Identify classes of event worthy of investigation. – Identify domains associated with suspicious events.
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Talos . External
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Sourcing
• How to get a whole picture, domain-wise?– No single type of sourcing is perfect (legal,
anonymous services, etc…)– Combination of various types of data sources – Observational data.
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Talos . External
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Building the network structure
• Organize domains by– Structural relationship– Custom defined.– Indexing for fast lookup.
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Talos . External
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System Architecture
Talos . External
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Static Analysis
• Analysis based on a single snapshot of world-wide domains– Analysis by keyword– Analysis by structure (relationship)
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Talos . External
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Keyword analysis
• Phishing attack– Masquerading as other trustworthy entity.– Similarity to the object of the masquerade
• Content • Domain name
• Template generated disposable domains
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Talos . External
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Static Analysis – Example (1)
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Talos . External
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Analysis by relationship
• Form follows function
• Reuse of the existing network structure– Business reuse infrastructure– So does bad guys – Most attacks are not alone
• Observation– Good guy: likes repels likes– Bad guy: likes attract likes
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Talos . External
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Static Analysis – Example (2)
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Talos . External
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Static Analysis – Example (3)
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Talos . External
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Static Analysis – Example (4)
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Talos . External
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Dynamic Analysis
• Analysis across multiple snapshots– More complex than static analysis– Type of change (from X to Y)– What is being changed (value)– Rate of change– More
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Talos . External
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Dynamic Analysis – Example (4)
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Talos . External
LCS Domains Rating Registrant Date[item] ideaitem.info. Malicious George --- 4/24[item] itemgroup.info. Malicious George --- 4/24[item] itemhosting.info. Malicious George --- 4/24[item] itemmusic.info. Malicious George --- 4/24[item] propertyitem.info. No Rating George --- 4/24[item] youitem.info. No Rating George --- 4/24[item] ideaitem.info. Malicious George --- 4/24[item] imageitem.info. Malicious George --- 4/24[item] itemgroup.info. Malicious George --- 4/24[item] itemhosting.info. Malicious George --- 4/24[item] itemsoft.info. Malicious George --- 4/24[item] propertyitem.info. No Rating George --- 4/24[item] youitem.info. No Rating George --- 4/24[yahoo] coolyahoo.info. Malicious Dorothy --- 4/24[yahoo] dotyahoo.info. Malicious Dorothy --- 4/24[yahoo] lifeyahoo.info. Malicious Dorothy --- 4/24[yahoo] www.yahooauto.info. Malicious Dorothy --- 4/24[yahoo] yahooblue.info. Malicious Dorothy --- 4/24
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qebinehuh.com
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Some Statistics about Talos
• 9 billions of domain related records as input per day
• 4TB of domain information in the past three months, in which 1 billion domains are involved and been frequently accessed
• 1 million domains identified as white-listed domains– Refreshed daily
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Questions?
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Thank You
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