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Trojan.Stabuniq Found on Financial Institution Servers


Symantec has recently encountered a threat named Trojan.Stabuniq. This Trojan was found on several servers belonging to financial institutions, including banking firms and credit unions. The Trojan has also compromised home computer users, as well as computers at security firms:

Figure 1. Trojan.Stabuniq distribution by type

Approximately half of unique IP addresses found with Trojan.Stabuniq belong to home users. Another 11 percent belong to companies that deal with Internet security (due, perhaps, to these companies performing analysis of the threat). A staggering 39 percent, however, belong to financial institutions. These financial institutions had their outer perimeter breached as the Trojan has been found on mail servers, firewalls, proxy servers, and gateways.

Trojan.Stabuniq has relied upon a combination of spam email and Web exploit kits to compromise computers. Over the past year, this threat has only been found in small numbers and has not been widespread, suggesting the authors may have been targeting specific people and entities. The approximate location of unique IP addresses where the Trojan has been found converges on the eastern half of the United States:

Figure 2. Trojan.Stabuniq geographic distribution by unique IP address

The Trojan collects information from the compromised computer and then sends it to a command-and-control (C&C) server. Additional technical details are available.

Overall, this Trojan has not infected many machines in the past year, is localized to the United States, and-given that close to 40 percent of its targets are financial institutions-at this stage we believe the malware authors may simply be gathering information.

Contributor: Alan Neville

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