APT28 Exploits Known Vulnerability To Carry Out Reconnaissance and Deploy Malware on Cisco Routers

NCSC, NSA, CISA, and FBI have released a joint advisory to provide details of tactics, techniques, and procedures (TTPs) associated with APT28's exploitation of Cisco routers in 2021.  By exploiting the vulnerability CVE-2017-6742, APT28 used infrastructure to masquerade Simple Network Management protocol (SNMP) access into Cisco routers worldwide, including routers in Europe, U.S. government institutions, and approximately 250 Ukrainian victims.

CISA encourages personnel to review NCSC’s Jaguar Tooth malware analysis report for detailed TTPs and indicators of compromise which may help detect APT28 activity. For more information on APT28 activity, see the advisories Russian State-sponsored and Criminal Cyber Threats to Critical Infrastructure and Russian GRU Conducting Global Brute Force Campaign to Compromise Enterprise and Cloud Environments.

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