News from PANUG March 8, 2001 http://www.panug.org SERIOUS INTERNET ATTACKS The following message was received a few hours ago from the SANS Institute. It details a very serious threat from attackers against Windows NT-based eCommerce sites. We know that many of you receive these messages from the SANS Institute directly but other PANUG members do not. We apologize for this duplication. Large Criminal Hacker Attack on Windows NT E-Banking and E-Commerce Sites 3:00 PM EST, Thursday, March 8, 2001 In the largest criminal Internet attack to date, a group of Eastern European hackers has spent a year systematically exploiting known Windows NT vulnerabilities to steal customer data. More than a million credit cards have been taken and more than 40 sites have been victimized. The FBI and Secret Service are taking the unprecedented step of releasing detailed forensic information from ongoing investigations because of the importance of the attacks. The information was released to the SANS community a short time before it was made available to the general public so that you can be sure your systems are safe. Within a day or two, the Center for Internet Security will release a small tool that you can use to check your systems for the vulnerabilities and also to look for files the FBI has found present on many compromised systems - indicating your system may have already been compromised by the attacker group. The Center's tools are normally available only to members, but because of the importance of this problem, the Center agreed to make the new tool, built for the Center by Steve Gibson of Gibson Research) available to all who need it. Center members have already received an invitation to the conference call this afternoon to get more data on the attack. If your organization is not a member, we encourage you to join in this important initiative to fight back against computer crime. See www.cisecurity.org for a list of members and how to join. Alan Alan Paller Director of Research The SANS Institute Here's the data available so far. Over the past several months, the National Infrastructure Protection Center (NIPC) has been coordinating investigations into a series of organized hacker activities specifically targeting U.S. computer systems associated with e-commerce or e- banking. Despite previous advisories, many computer owners have not patched their systems, allowing these kinds of attacks to continue, and prompting this updated release of information. More than 40 victims located in 20 states have been identified and notified in ongoing investigations in 14 Federal Bureau of Investigation Field Offices and 7 United States Secret Service Field Offices. These investigations have been closely coordinated with foreign law enforcement authorities, and the private sector. Specially trained prosecutors in the Computer and Telecommunication Coordinator program in U.S. Attorneys' Offices in a variety of districts have participated in the investigation, with the assistance of attorneys in the Computer Crime and Intellectual Property Section at the Department of Justice. The investigations have disclosed several organized hacker groups from Eastern Europe, specifically Russia and the Ukraine, that have penetrated U.S. e-commerce computer systems by exploiting vulnerabilities in unpatched Microsoft Windows NT operating systems. These vulnerabilities were originally reported and addressed in Microsoft Security Bulletins MS98-004 (re-released in MS99-025), MS00-014, and MS00-008. As early as 1998, Microsoft discovered these vulnerabilities and developed and publicized patches to fix them. Computer users can download these patches from Microsoft for free. Once the hackers gain access, they download proprietary information, customer databases, and credit card information. The hackers subsequently contact the victim company through facsimile, email, or telephone. After notifying the company of the intrusion and theft of information, the hackers make a veiled extortion threat by offering Internet security services to patch the system against other hackers. They tell the victim that without their services, they cannot guarantee that other hackers will not access the network and post the credit card information and details about the compromise on the Internet. If the victim company is not cooperative in making payments or hiring the group for their security services, the hackers' correspondence with the victim company has become more threatening. Investigators also believe that in some instances the credit card information is being sold to organized crime groups. There has been evidence that the stolen information is at risk whether or not the victim cooperates with the demands of the intruders. To date, more than one million credit card numbers have been stolen. The NIPC has issued an updated Advisory 01-003 at www.nipc.gov regarding these vulnerabilities being exploited. The update includes specific file names that may indicate whether a system has been compromised. If these files are located on your computer system, the NIPC Watch in Washington D.C. should be contacted at (202) 323-3204/3205/3206. Incidents may also be reported online at www.nipc.gov/incident/cirr.htm. For detailed information on the vulnerabilities that are being exploited, please refer to the NIPC Advisory 00-60, and NIPC Advisory 01- 003. NIPC ADVISORY 01-003 This advisory is an update to the NIPC Advisory 00-060, "E- Commerce Vulnerabilities", dated December 1, 2000. Since the advisory was published, the FBI has continued to observe hacker activity targeting victims associated with e-commerce or e- finance/banking businesses. In many cases, the hacker activity had been ongoing for several months before the victim became aware of the intrusion. The NIPC emphasizes the recommendation that all computer network systems administrators check relevant systems and consider applying the updated patches as necessary, especially for systems related to e-commerce or e- banking/financial businesses. The patches are available on Microsoft=s web site, and users should refer to the URLs listed below. The following vulnerabilities have been previously reported: Unauthorized Access to IIS Servers through Open Database Connectivity (ODBC) Data Access with Remote Data Service (RDS): Systems Affected: Windows NT running IIS with RDS enabled. Details: Microsoft Security Bulletin MS99-025, NIPC CyberNotes 99-22 http://www.microsoft.com/technet/security/bulletin/ms99-025.asp http://www.nipc.gov/warnings/advisories/1999/99-027.htm, http://www.nipc.gov/cybernotes/cybernotes.htm Summary: Allows unauthorized users to execute shell commands on the IIS system as a privileged use; Allows unauthorized access to secured, non-published files on the IIS system; On a multi-homed Internet-connected IIS systems, using Microsoft Data Access Components (MDAC), allows unauthorized users to tunnel Structured Query Language (SQL) and other ODBC data requests through the public connection to a private back-end network. SQL Query Abuse Vulnerability Affected Software Versions: Microsoft SQL Server Version 7.0 and Microsoft Data Engine (MSDE) 1.0 Details: Microsoft Security Bulletin MS00-14, NIPC CyberNotes 20-05 http://www.microsoft.com/technet/security/bulletin/ms00-014.asp http://www.nipc.gov/cybernotes/cybernotes.htm Summary: The vulnerability could allow the remote author of a malicious SQL query to take unauthorized actions on a SQL Server or MSDE database. Registry Permissions Vulnerability Systems Affected: Windows NT 4.0 Workstation, Windows NT 4.0 Server Details: Microsoft Security Bulletin MS00-008, NIPC CyberNotes 20-08 and 20-22 http://www.microsoft.com/technet/security/bulletin/ms00-008.asp http://www.nipc.gov/cybernotes/cybernotes.htm Summary: Users can modify certain registry keys such that: a malicious user could specify code to launch at system crash a malicious user could specify code to launch at next login an unprivileged user could disable security measures Web Server File Request Parsing While they have not been shown to be a vector for the current attacks, Microsoft has advised us that the vulnerabilities addressed by Microsoft bulletin MS00-086 are very serious, and we encourage web site operators to consider applying the patch provided with this bulletin as well as the three that are under active exploitation. http://www.microsoft.com/technet/security/bulletin/ms00-014.asp http://www.nipc.gov/cybernotes/cybernotes.htm Summary: The vulnerability could allow a malicious user to run system commands on a web server. New Information: In addition to the above exploits, several filenames have been identified in connection with the intrusions, specific to Microsoft Windows NT systems. The presence of any of these files on your system should be reviewed carefully because they may indicate that your system has been compromised: ntalert.exe sysloged.exe tapi.exe 20.exe 21.exe 25.exe 80.exe 139.exe 1433.exe 1520.exe 26405.exe i.exe In addition, system administrators may want to check for the unauthorized presence of any of the following executable files, which are often used as hacking tools: lomscan.exe mslom.exe lsaprivs.exe pwdump.exe serv.exe smmsniff.exe Recipients of this Advisory are encouraged to report computer crime to the NIPC Watch at (202) 323-3204/3205/3206. Incidents may also be reported online at www.nipc.gov/incident/cirr.htm.