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Nation-stateApr 13, 2026

North Korea's APT37 Uses Facebook Social Engineering to Deliver RokRAT Malware

APT37 runs Facebook social engineering campaign to deliver RokRAT malware.

North Korean threat group APT37 (ScarCruft) conducted a multi-stage social engineering campaign using Facebook friend requests to build trust with targets, then moved conversations to Telegram to deliver a trojanized Wondershare PDFelement installer. The tampered PDF viewer executes shellcode that downloads RokRAT, a remote access trojan that abuses Zoho WorkDrive for command-and-control and can capture screenshots, execute commands, and evade security software.

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The lesson from this incident

Full lesson

North Korea's APT37 successfully weaponized social engineering by using Facebook to establish trust with targets before transitioning to Telegram to deliver malicious software. The attackers compromised a legitimate PDF viewer installer (Wondershare PDFelement) to deploy RokRAT malware that uses cloud services like Zoho WorkDrive for command-and-control, making detection more difficult. This attack demonstrates how sophisticated threat actors combine social manipulation with supply chain compromise to bypass traditional security controls. Organizations must recognize that human trust remains a critical vulnerability that can be exploited to deliver advanced persistent threats.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • domain — japanroom[.]com
  • malware — RokRAT

Entities

APT37 (threat_actor)ScarCruft (threat_actor)Ruby Jumper (campaign)Wondershare PDFelement (product)Zoho WorkDrive (product)