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U.S. Department of Justice Federal Bureau of Investigation In Reply, Please Refer to File No. 26 Federal Plaza New York, NY 10278 May 13, 2003 Senate —_ couse! b6 -6 642 Senate Hart Building bIC -6 Washington, DC 20510 RE: ADRIAN LAMO, Hack of website www.senate.gov Dear[___ As per ofr conversation on 12/28/2003, I am writing to request informatigén pertaining the unauthorized intrusion of the’ website www.s: in December 2003. Investigation the E New York Office has revealed that the inaiviaualcapetnny (tao) responsible for this unauthorized intrusion. LAMO is a subject of an ongoing investigation by the FBI's New York office. LAMO has claimed credit for the unauthorized intrusions into The New York Times, Worldcom, Microsoft, Yahoo, AOL, SBC Communications and excite@home.com through open proxy servers. LAMO uses a "Proxy Hunter" to search the Internet for proxy servers that are misconfigured. Once he obtains this information, he configures his browser to appear and utilize the proxy server as his own. Once the computer intrusion occurs, LAMO searches the network to determine if there are any other vulnerabilities. LAMO has left backdoors in the networks providing him with the ability to enter the network at another time undetected. The enclosed article dated 12/10/2002 from Securityfocus.com states that LAMO gained access to www.senate.gov through an open proxy server. TRACY WILLIAMS, Director of technology development for the Sergeant-at-Arms, blamed the incident on misconfigured devices associated with the Web site and that the devices were taken off line until they could be configured correctly. The FBI's New York Office is requesting all records and other evidence~imn—the,.possession of www.senate.gov. Such records and evidence, include, ibutitaré Hot limited to, all accounts, computer logs, files, communications, E-mail messages, programs, client accolht’ records and files, and any other documents: worked on, reviewed‘by, drafted by, edited by, examined by, received by, Brags s FBI(19-cv-1495)-1794