Opal Sleet

Known Names 21 entries

Observed Target Countries 17

Based on ETDA data — countries highlighted in red

Description

Some research organizations link this group to {{Lazarus Group, Hidden Cobra, Labyrinth Chollima}}. (FireEye) Read our report, APT37 (Reaper): The Overlooked North Korean Actor, to learn more about our assessment that this threat actor is working on behalf of the North Korean government, as well as various other details about their operations: • Targeting: Primarily South Korea – though also Japan, Vietnam and the Middle East – in various industry verticals, including chemicals, electronics, manufacturing, aerospace, automotive, and healthcare. • Initial Infection Tactics: Social engineering tactics tailored specifically to desired targets, strategic web compromises typical of targeted cyberespionage operations, and the use of torrent file-sharing sites to distribute malware more indiscriminately. • Exploited Vulnerabilities: Frequent exploitation of vulnerabilities in Hangul Word Processor (HWP), as well as Adobe Flash. The group has demonstrated access to zero-day vulnerabilities (CVE-2018-0802), and the ability to incorporate them into operations. • Command and Control Infrastructure: Compromised servers, messaging platforms, and cloud service providers to avoid detection. The group has shown increasing sophistication by improving their operational security over time. • Malware: A diverse suite of malware for initial intrusion and exfiltration. Along with custom malware used for espionage purposes, APT37 also has access to destructive malware.

Tools Used 36

Operations 53

Reports & References 7