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The US-CERT Current Activity web page is a regularly updated summary of the most frequent, high-impact types of security incidents currently being reported to the US-CERT.

Copyright Infringement Lawsuit Email Scam

US-CERT is aware of public reports of an active email scam. These emails, which appear to come from seemingly legitimate law firms, indicate that someone has filed a copyright lawsuit against the message recipient. The messages may contain malicious attachments or web links. If a user opens the attachment or follows the link, malicious code may be installed on the user's system.

US-CERT encourages users to take the following preventative measures to help mitigate the security risks:

US Tax Season Phishing Scams and Malware Campaigns

In the past, US-CERT has received reports of an increased number of phishing scams and malware campaigns that take advantage of the United States tax season. Due to the upcoming tax deadline, US-CERT reminds users to remain cautious when receiving unsolicited email that could be part of a potential phishing scam or malware campaign.

These phishing scams and malware campaigns may include the following: information that refers to a tax refund, warnings about unreported or under-reported income, offers to assist in filing for a refund, or details about fake e-file websites. These messages, which appear to be from the IRS, may ask users to submit personal information via email or may instruct the user to follow a link to a website that requests personal information or contains malicious code.

At this time, US-CERT is aware of public reports indicating that there is active circulation of a tax season malware campaign. This malware campaign may be using malicious code commonly known as Zeus or Zbot.

Cisco Releases Security Advisories for IOS Software

Cisco has released a bundled publication, which contains seven security advisories, to address multiple vulnerabilities in Cisco IOS Software. These vulnerabilities may allow an attacker to execute arbitrary code or cause a denial-of-service condition.

US-CERT encourages users and administrators to review the security advisories listed in the Cisco IOS Software Security Advisory bundled publication (cisco-sa-20100324-bundle) and apply any necessary updates to help mitigate the risks.

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