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Nearly 9GB of Alleged Kimsuky Files Surface on DDoSecrets After DEF CON Release

Leaked files reveal Kimsuky’s cyber-espionage tools, stolen credentials, and operational details, exposing vulnerabilities in North Korea’s hacking unit, according to cybersecurity analysts.

  • Last week at DEF CON 33, two hackers known as Saber and cyb0rg leaked 8.9GB of Kimsuky’s files via DDoSecrets after compromising a virtual workstation and VPS linked to ‘KIM’.
  • Saber and cyb0rg say they gained access by compromising a virtual workstation and VPS linked to an operator called “KIM”, citing ethical objections to Kimsuky’s agenda.
  • Delving into the archive reveals attack logs showing attempts to compromise South Korea’s Defense Counterintelligence Command and MFA email platform, alongside a PHP “Generator” toolkit and unknown binaries not flagged by VirusTotal.
  • South Korean agencies have started reviewing the leak to harden networks and anticipate rapid reverse-engineering of implants for detection strategies.
  • With insider-risk trend on display, the breach highlights vulnerabilities in clandestine cyber units and the performative timing at DEF CON 33 and publication in Phrack.
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A mysterious state-sponsored hacker, initially linked to the North Korean group Kimsuky, has also been hacked. But analysis of the data leak has experts wondering: what if the operator was actually Chinese? The investigation is open.

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HackRead broke the news in on Monday, August 11, 2025.
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