Countering threats from North Korea

On February 10, Threat Analysis Group discovered two distinct North Korean government-backed attacker groups exploiting a remote code execution vulnerability in Chrome, CVE-2022-0609. These groups’ activity has been publicly tracked as Operation Dream Job and Operation AppleJeus.

We observed the campaigns targeting U.S. based organizations spanning news media, IT, cryptocurrency and fintech industries. However, other organizations and countries may have been targeted. One of the campaigns has direct infrastructure overlap with a campaign targeting security researchers which we reported on last year. The exploit was patched on February 14, 2022. The earliest evidence we have of this exploit kit being actively deployed is January 4, 2022.

We suspect that these groups work for the same entity with a shared supply chain, hence the use of the same exploit kit, but each operate with a different mission set and deploy different techniques. It is possible that other North Korean government-backed attackers have access to the same exploit kit.

In this blog, we will walk through the observed tactics, techniques and procedures, share relevant IOCs and analyze the exploit kit used by the attackers. In line with our current disclosure policy, we are providing these details 30 days after the patch release.

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