US CERT Cyber Security Tips
Throughout the year, scam artists pose as legitimate entities—such as the Internal Revenue Service (IRS), other government agencies, and financial institutions—in an attempt to defraud taxpayers. They employ sophisticated phishing campaigns to lure users to malicious sites or entice them to activate malware in infected email attachments. To protect sensitive data, credentials, and payment information, US-CERT and the IRS recommend taxpayers prepare for heightened risk this tax season and remain vigilant year-round.Remain alert
Phishing attacks use email or malicious websites to solicit personal information by posing as a trustworthy organization. In many successful incidents, recipients are fooled into believing the phishing communication is from someone they trust. An actor may take advantage of knowledge gained from research and earlier attempts to masquerade as a legitimate source, including the look and feel of authentic communications. These targeted messages can trick any user into taking action that may compromise enterprise security.Spot common elements of the phishing lifecycle
- A Lure: enticing email content.
- A Hook: an email-based exploit.
- Email with embedded malicious content that is executed as a side effect of opening the email
- Email with malicious attachments that are activated as a side effect of opening an attachment
- Email with “clickable” URLs: the body of the email includes a link, which displays as a recognized, legitimate website, though the actual URL redirects the user to malicious content
- A Catch: a transaction conducted by an actor following a successful attempt.
- Unexplainable charges
- Unexplainable password changes
- The IRS does not initiate contact with taxpayers by email, text messages or social media channels to request personal or financial information.
- This includes requests for PIN numbers, passwords or similar access information for credit cards, banks or other financial accounts.
- The official website of the IRS is www.irs.gov.
If you believe you might have revealed sensitive information about your organization or access credentials, report it to the appropriate contacts within the organization, including network administrators. They can be alert for any suspicious or unusual activity.
Watch for any unexplainable charges to your financial accounts. If you believe your accounts may be compromised, contact your financial institution immediately and close those accounts.
If you believe you might have revealed sensitive account information, immediately change the passwords you might have revealed. If you used the same password for multiple accounts, make sure to change the password for each account and do not use that password in the future.Report suspicious phishing communications
- Email: If you read an email claiming to be from the IRS, do not reply or click on attachments and/or links. Forward the email as-is to firstname.lastname@example.org, then delete the original email.
- Website: If you find a website that claims to be the IRS and suspect it is fraudulent, send the URL of the suspicious site to email@example.com with subject line, “Suspicious website”.
- Text Message: If you receive a suspicious text message, do not reply or click on attachments and/or links. Forward the text as-is to 202-552-1226 (standard text rates apply), and then delete the original message (if you clicked on links in SMS and entered confidential information, visit the IRS’ identity protection page).
If you are a victim of any of the above scams involving IRS impersonation, please report to firstname.lastname@example.org, file a report with the Treasury Inspector General for Tax Administration (TIGTA), the Federal Trade Commission (FTC), and the police.Additional Resources
For more information on phishing, other suspicious IRS-related communications including phone or fax scams, or additional guidance released by Treasury/IRS and DHS/US-CERT, visit:
- Avoiding Social Engineering and Phishing Attacks
- Recognizing and Avoiding Email Scams
- Phishing and Other Schemes Using the IRS Name
- IRS Repeats Warning about Phone Scams
- Report Phishing and Online Scams
- Tips for Taxpayers, Victims about Identity Theft and Tax Returns
To report a cybersecurity incident, vulnerability, or phishing attempt, visit US-CERT.gov/report.Author: US-CERT and IRS