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   Largest US steel manufacturer puts production on the backburner after cyber   
   attack   
      
   Date:   
   Thu, 15 May 2025 14:00:00 +0000   
      
   Description:   
   Nucor was forced to shut down production but it's currently resuming.   
      
   FULL STORY   
      
   Nucor, one of the biggest steel manufacturers in the United States, was    
   forced to shut down parts of its operations to address an ongoing    
   cyberattack. The company confirmed the news in a new 8-K form filed with the   
   US Securities and Exchange Commission (SEC).    
      
   In the filing, Nucor said it recently observed an unauthorized third party   
   accessing certain information technology systems. When it spotted the   
   intrusion, it activated its incident response plan, brought in a third-party   
   cybersecurity company to assist, and notified relevant law enforcement   
   agencies.    
      
   However, it also took potentially affected systems offline to implement other   
   containment, remediation, or recovery measures.    
      
   Was it ransomware?   
      
   Nucor told the SEC that it temporarily and proactively stopped certain   
   production operations at various locations in an abundance of caution. It is   
   now restarting those operations, it added.    
      
   Usually, when a company shuts down its operations to contain a cyberattack,    
   it usually ends up being a ransomware attack. While the company did not   
   explicitly say so, the fact that it halted operations could suggest this is   
   the case.    
      
   Furthermore, The Register tried reaching out to the companys facilities    
   around the US, but found many phone numbers either shut down or unobtainable.   
   Sometimes, a ransomware attack also results in inaccessible phone lines.    
      
   The importance Nucor plays in supporting the US critical infrastructure would   
   also make it a prime target for ransomware attackers. No threat actors have   
   claimed responsibility just yet, and we dont know if any sensitive data was   
   taken in the breach.    
      
   Nucor is headquartered in Charlotte, North Carolina, and is widely considered   
   as the largest US steel producer, and one of the top recyclers. It operates   
   more than 300 facilities across the US, Canada, and Mexico, and manufactures    
   a wide range of steel products. Last year, it reported annual net sales of   
   $30.73 billion.    
      
    Via The Register   
      
   ======================================================================   
   Link to news story:   
   https://www.techradar.com/pro/security/largest-us-steel-manufacturer-puts-prod   
   uction-on-the-backburner-after-cyber-attack   
      
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