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Adaptavist Group Hit by Cyber Attack: Ransomware Crew Claims Mega-Haul



Adaptavist Group, a UK-based enterprise software consultancy, has announced that it is under investigation following a suspected cyber attack. The company claims that no personal data relating to customers or partners was accessed, but a ransomware crew has come forward claiming a "complete infrastructure compromise" and a cache of stolen data, including customer records and internal documents.

  • Adaptavist Group, a UK-based enterprise software consultancy, is under investigation following a suspected cyber attack.
  • An unknown third party sent misleading correspondence impersonating the company to customers and partners.
  • The company detected an IT security incident in late March after an attacker gained unauthorized access to some of its systems using compromised login details.
  • Adaptavist Group has brought in external security specialists to conduct a forensic investigation into the breach.
  • Ransomware crew "The Gentlemen" claimed responsibility for the attack and released stolen data, including customer records and internal documents.
  • The legitimacy of these claims is disputed due to ransomware crews' history of overstating their access to increase pressure on victims.


  • In a shocking turn of events, UK-based enterprise software consultancy Adaptavist Group has announced that it is under investigation following a suspected cyber attack. According to reports, an unknown third party sent "misleading correspondence" to customers and partners impersonating the company in relation to the incident. This led to an alert being issued by the company's CEO, Simon Haighton-Williams, who stated that the business detected an "IT security incident" in late March after an attacker used compromised login details to gain unauthorized access to some of its systems.

    The company has brought in external security specialists and is currently conducting a forensic investigation to determine what, if anything, was accessed or taken. In his statement, Haighton-Williams assured customers that the data held by Adaptavist Group related to individual customer contacts would not include sensitive information such as contact numbers, job roles, or organization details.

    However, this assurance was quickly contradicted by a ransomware crew calling itself "The Gentlemen," which claimed responsibility for the attack on its dark web leak site. The group boasted of a "complete infrastructure compromise" and a sprawling cache of stolen data, including hundreds of thousands of alleged customer records, source code for products like ScriptRunner, internal documents, credentials, and production systems.

    While these claims are certainly concerning, it is essential to note that they should be treated with caution. Ransomware crews have a history of overstating their access to increase pressure on their victims, and Adaptavist Group has made it clear that there is "no evidence" that data relating to customers was accessed.

    The incident serves as a reminder of the ever-present threat of cyber attacks in today's digital landscape. As companies continue to rely increasingly on technology to operate, they must remain vigilant and take proactive steps to protect their systems and data from would-be hackers. In this case, Adaptavist Group's swift response and commitment to transparency demonstrate a responsible approach to dealing with such incidents.

    The situation highlights the importance of employee training, robust security protocols, and regular software updates in preventing cyber attacks. Furthermore, it underscores the need for companies to establish effective incident response plans and communicate clearly with their customers during times of crisis.



    Related Information:
  • https://www.ethicalhackingnews.com/articles/Adaptavist-Group-Hit-by-Cyber-Attack-Ransomware-Crew-Claims-Mega-Haul-ehn.shtml

  • https://go.theregister.com/feed/www.theregister.com/2026/04/21/adaptavist_group_breach_spawns_impostor/

  • https://www.theregister.com/2026/04/21/adaptavist_group_breach_spawns_impostor/?td=keepreading

  • https://www.dexpose.io/thegentlemen-ransomware-strikes-adaptavist-group-ltd/


  • Published: Tue Apr 21 04:28:50 2026 by llama3.2 3B Q4_K_M













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