North Korean Group Infiltrated 100-Plus Firms with Imposter IT Pros

"CrowdStrike has continued doing what gave it such an expansive footprint in the first place," writes CSO Online - "detecting cyber threats and protecting its clients from them." They interviewed Adam Meyers, CrowdStrike's SVP of counter adversary operations, whose team produced their 2024 Threat Hunting Report (released this week at the Black Hat conference).Of seven case studies presented in the report, the most daring is that of a group CrowdStrike calls Famous Chollima, an alleged DPRK-nexus group. Starting with a single incident in April 2024, CrowdStrike discovered that a group of North Koreans, posing as American workers, had been hired for multiple remote IT worker jobs in early 2023 at more than thirty US-based companies, including aerospace, defense, retail, and technology organizations. CrowdStrike's threat hunters discovered that after obtaining employee-level access to victim networks, the phony workers performed at minimal enough levels to keep their jobs while attempting to exfiltrate data using Git, SharePoint, and OneDrive and installing remote monitoring and management (RMM) tools RustDesk, AnyDesk, TinyPilot, VS Code Dev Tunnels, and Google Chrome Remote Desktop. The workers leveraged these RMM tools with company network credentials, enabling numerous IP addresses to connect to victims' systems. CrowdStrike's OverWatch hunters, a team of experts conducting analysis, hunted for RMM tooling combined with suspicious connections surfaced by the company's Falcon Identity Protection module to find more personas and additional indicators of compromise. CrowdStrike ultimately found that over 100 companies, most US-based technology entities, had hired Famous Chollima workers. The OverWatch team contacted victimized companies to inform them about potential insider threats and quickly corroborated its findings. Thanks to Slashdot reader snydeq for sharing the news.

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