Just weeks after WannaCry wreaked havoc around the world, a new malware variant from North Korea has prompted an urgent alert from the US Computer Emergency Readiness Team (CERT) that could have implications on media, aerospace, financial sectors, and critical infrastructure.

The malware, called Delta Charlie, is used by a North Korean team called Hidden Cobra to manage a DDoS botnet infrastructure. Likely targets are networks that use older or outdated versions of Microsoft operating systems and Adobe Flash player–both known to have security flaws and vulnerabilities.

CERT’s advisory urges administrators to contact the FBI or DHS as soon as possible if they detect any Hidden Cobra malware, network signatures, or other activity.

Read the full report here.