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Is your IP a Tor exit node?
- Tor routes internet traffic through volunteer-operated servers to provide anonymity and privacy.
- Legitimate users may utilize Tor for online privacy, but threat actors can exploit it for malicious activities.
- Detection of Tor activity within an organization should raise concerns and trigger investigations.
- A Python script has been developed to analyze network traffic and user authentication logs for detecting malicious Tor traffic.
- Communication with both entry and exit points of the Tor network may indicate a connection to a hidden C2 server.
- Accessing a user account from a Tor exit node could signify a threat actor using stolen credentials while hiding their IP address.
- The script utilizes a live list of Tor exit nodes from the Official Tor Project to identify malicious traffic.
- Timely ingestion of logs is crucial for accurate detection, as the list of active exit nodes changes frequently.
- Sophisticated threat actors may avoid Tor to prevent detection in corporate environments, opting for other techniques like commercial VPNs.
- Less advanced adversaries may still leverage Tor, leading to detectable patterns of traffic.
- Using commercial VPNs or compromised devices is a common tactic among threat actors to disguise malicious traffic.
- The script aims to identify potentially damaging but less sophisticated attacks relying on the Tor network.
- The full script can be found in the developer's Github Repository.
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