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Home » Security » IRAN: Dept.of Homeland Security’s CISA issues cyber warning to US companies

IRAN: Dept.of Homeland Security’s CISA issues cyber warning to US companies

PortandTerminal.com, January 7, 2020

Potential for Iranian Cyber Response to U.S. Military Strike in Baghdad

WASHINGTON – Yesterday, the U.S. Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency (CISA) released an Alert warning about potential cyberattacks on U.S. companies by Iran.

To read the full alert click here

We are reprinting key elements of CISA’s alert (AA20-006A) below:

Summary

The Cybersecurity and Infrastructure Security Agency (CISA) is sharing the following information with the cybersecurity community as a primer for assisting in the protection of our Nation’s critical infrastructure in light of the current tensions between the Islamic Republic of Iran and the United States and Iran’s historic use of cyber offensive activities to retaliate against perceived harm. Foremost, CISA recommends organizations take the following actions:

  1. Adopt a state of heightened awareness. This includes minimizing coverage gaps in personnel availability, more consistently consuming relevant threat intelligence, and making sure emergency call trees are up to date.
  2. Increase organizational vigilance. Ensure security personnel are monitoring key internal security capabilities and that they know how to identify anomalous behavior. Flag any known Iranian indicators of compromise and tactics, techniques, and procedures (TTPs) for immediate response.
  3. Confirm reporting processes. Ensure personnel know how and when to report an incident. The well-being of an organization’s workforce and cyber infrastructure depends on awareness of threat activity. Consider reporting incidents to CISA to help serve as part of CISA’s early warning system (see Contact Information section below).
  4. Exercise organizational incident response plans. Ensure personnel are familiar with the key steps they need to take during an incident. Do they have the accesses they need? Do they know the processes? Are your various data sources logging as expected? Ensure personnel are positioned to act in a calm and unified manner.

Recommended Actions

The following is a composite of actionable technical recommendations for IT professionals and providers to reduce their overall vulnerability. These recommendations are not exhaustive; rather they focus on the actions that will likely have the highest return on investment. In general, CISA recommends two courses of action in the face of potential threat from Iranian actors: 1) vulnerability mitigation and 2) incident preparation.

  1. Disable all unnecessary ports and protocols. Review network security device logs and determine whether to shut off unnecessary ports and protocols. Monitor common ports and protocols for command and control activity.
  2. Enhance monitoring of network and email traffic. Review network signatures and indicators for focused operations activities, monitor for new phishing themes and adjust email rules accordingly, and follow best practices of restricting attachments via email or other mechanisms.  
  3. Patch externally facing equipment. Focus on patching critical and high vulnerabilities that allow for remote code execution or denial of service on externally facing equipment.
  4. Log and limit usage of PowerShell. Limit the usage of PowerShell to only users and accounts that need it, enable code signing of PowerShell scripts, and enable logging of all PowerShell commands.
  5. Ensure backups are up to date and stored in an easily retrievable location that is air-gapped from the organizational network.

Contact Information

CISA encourages recipients of this report to contribute any additional information that they may have related to this threat. For any questions related to this report, please contact CISA at

  • 1-888-282-0870 (From outside the United States: +1-703-235-8832)
  • CISAServiceDesk@cisa.dhs.gov (UNCLASS)
  • us-cert@dhs.sgov.gov (SIPRNET)
  • us-cert@dhs.ic.gov (JWICS)

CISA encourages you to report any suspicious activity, including cybersecurity incidents, possible malicious code, software vulnerabilities, and phishing-related scams. Reporting forms can be found on the CISA homepage at http://www.us-cert.gov/.

To read CISA’s full alert including specific technical information and recommendations click here.

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