Attacks Leveraging Adobe Zero-Day (CVE-2018-4878) – Threat Attribution [source: fireeye]
On Jan. 31, KISA (KrCERT) published an advisory about an Adobe Flash zero-day vulnerability (CVE-2018-4878) being exploited in the wild. On Feb. 1, Adobe issued an advisory confirming the vulnerability exists in Adobe Flash Player 188.8.131.52 and earlier versions, and that successful exploitation could potentially allow an attacker to take control of the affected system.
FireEye began investigating the vulnerability following the release of the initial advisory from KISA.
We assess that the actors employing this latest Flash zero-day are a suspected North Korean group we track as TEMP.Reaper. We have observed TEMP.Reaper operators directly interacting with their command and control infrastructure from IP addresses assigned to the STAR-KP network in Pyongyang. The STAR-KP network is operated as a joint venture between the North Korean Government’s Post and Telecommunications Corporation and Thailand-based Loxley Pacific. Historically, the majority of their targeting has been focused on the South Korean government, military, and defense industrial base; however, they have expanded to other international targets in the last year. They have taken interest in subject matter of direct importance to the Democratic People’s Republic of Korea (DPRK) such as Korean unification efforts and North Korean defectors.
In the past year, FireEye iSIGHT Intelligence has discovered newly developed wiper malware being deployed by TEMP.Reaper, which we detect as RUHAPPY. While we have observed other suspected North Korean threat groups such as TEMP.Hermit employ wiper malware in disruptive attacks, we have not thus far observed TEMP.Reaper use their wiper malware actively against any targets.
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