Adversary

Ricochet Chollima

ORIGIN

North Korea

Community Identifiers

ScarCruft, APT37, Group123, Reaper, Red Eyes

Ricochet Chollima is a Democratic Peoples’ Republic of Korea (DPRK) targeted intrusion adversary that has been involved in espionage operations since at least 2016.

Ricochet Chollima’s observed operations have almost exclusively targeted the Republic of Korea (RoK) and are focused on RoK government officials, non-governmental organizations (NGOs), academics, journalists, and DPRK defectors.

This target scope is similar to those observed in VELVET CHOLLIMA operations; however, RICOCHET CHOLLIMA consistently demonstrates a level of skill and operational complexity that places it among the most technically advanced DPRK adversaries.

Ricochet Chollima frequently relies on cloud-based file hosting services. This distinctive tactic has become a defining element of RICOCHET CHOLLIMA’s malware. RICOCHET CHOLLIMA operations have included spear-phishing operations leveraging malicious Korean language Hangul Word Processor (HWP) documents to drop custom implants such as the Cirrus and Nimbus RATs..

Recent Activity

In December 2020, CrowdStrike Intelligence discovered a new tool used by RICOCHET CHOLLIMA named the PoorWeb RAT. PoorWeb is delivered via an OLE object embedded in a malicious HWP document to load a first-stage dropper and subsequently the PoorWeb payload—a tactic previously used by RICOCHET CHOLLIMA. This malware is capable of collecting system information, taking screenshots, enumerating drives and files, and executing commands. While the target scope of PoorWeb is nebulous, decoy documents included content pertaining to Korean unification, suggesting those sympathetic to the DPRK were the focus of observed activity.

Targeted Nations

  • Flag Icon of the country Hong Kong

    Hong Kong

  • Flag Icon of the country North Korea

    North Korea

  • Flag Icon of the country Russian Federation

    Russian Federation

  • Flag Icon of the country South Korea

    South Korea

  • Flag Icon of the country United States

    United States

  • Flag Icon of the country Saudi Arabia

    Saudi Arabia

  • Flag Icon of the country Turkey

    Turkey

  • Flag Icon of the country United Arab Emirates

    United Arab Emirates

  • Flag Icon of the country Vietnam

    Vietnam

Artwork

Adversary: Ricochet Chollima - Threat Actor

Crowdstrike Ricochet Chollima

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