The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) yesterday announced an investigation into a “major” cybersecurity incident that the Qilin ransomware group claimed responsibility for. Given that is is Qilin, that’s all that needs to be said really.
Commenting on this is Paul Bischoff, Consumer Privacy Advocate at Comparitech:
“We recorded a significant uptick in the number of Qilin’s claims last month. Qilin claimed responsibility for the second-most data breaches out of all ransomware gangs in July, second only to the Gentlemen. Many of Qilin’s attack claims have proven credible. Most experts believe Qilin is based in Russia, which raises further questions about national security and what data was exposed.”
If you want to see more details on the Comparitech report that is being referred to, here you go: https://www.comparitech.com/news/ransomware-roundup-july-2026/
UPDATE: The ATF has since confirmed a breach of one standalone, isolated system that was quickly disconnected, and says its enterprise network, eForms system, and core mission functions were not affected. Qilin listed the ATF on its leak site on August 26 but hasn’t posted the screenshots or stolen documents it typically shares as proof, and the DOJ has designated it a “major incident,” which triggers mandatory federal reporting.
Adrian Culley, offensive security engineer at SafeBreach had this to say:
“ATF’s claim that the compromised system “operates separately from the ATF enterprise network” is the detail worth testing rather than accepting at face value. A genuinely standalone system with no route out has no way to hand data to Qilin’s leak site — so either that isolation has a gap nobody has mapped yet, or the segmentation held and what Qilin is holding is thinner than the leak posting implies. Both are worth knowing before this gets filed as contained.
Qilin’s tradecraft favours exploiting internet-facing systems for initial access (T1190) before attempting lateral movement (T1021) toward whatever segment holds value. That a federal law enforcement agency runs a system isolated enough to survive contact with its enterprise network is good practice. Whether that isolation has actually been tested against an actor trying to break out of it is a separate question, and the more important one.
Owning a segmentation boundary and knowing it holds under a live attack path are not the same claim. Before this incident is closed out, I am sure that the ATF’s own investigators will be running the same lateral-movement techniques Qilin favours against that boundary directly, rather than relying on logs that simply show no crossing occurred.
MoneyGram hack claimed by The Gentleman, 60M customers at risk
Posted in Commentary with tags Comparitech on October 12, 2026 by itnerdThe Gentlemen ransomware gang has claimed an attack on MoneyGram, one of the world’s largest payment networks, and is threatening to release the stolen data. MoneyGram serves 60 million active customers across more than 200 countries.
Rebecca Moody, Head of Data Research at Comparitech:
“The Gentlemen has become one of the most prolific ransomware groups of recent years and isn’t known for fabricating its claims. MoneyGram needs to issue a statement as soon as possible to either reassure its customers that a breach hasn’t occurred or warn them of any potential unauthorized access to its systems.
Financial organizations are a key target for ransomware groups because of the highly sensitive data they deal with. The Gentlemen has claimed 46 attacks on such entities so far this year.
Also of note is its attack on a South African tech company, MIP Holdings. This took place in June 2026, with MIP paying The Gentlemen a ransom to delete the stolen data. However, The Gentlemen has now started targeting MIP’s clients and is issuing them with their own ransom demand. This serves as a key reminder that paying a ransomware group to delete data doesn’t guarantee any data will be deleted. In MoneyGram’s case, regardless of whether or not negotiations are successful, individual customers could be contacted by the group. Therefore, MoneyGram’s customers and employees should be on high alert for any potential phishing messages and unauthorized account activity.”
Brian Higgins, Security Specialist at Comparitech:
“It’s very early in the incident response timeline but that’s no reason for anyone who may be affected should this attack prove genuine not to be extra vigilant whilst more details become available. It’s not MoneyGram’s first rodeo so there’s a good chance they will be able to offer decent information and advice as things progress, so it would be a good idea to monitor their comms output. Unfortunately these days more and more people are aware of the personal mitigations they should be considering; changing passwords, monitoring accounts, ignoring and reporting unsolicited contact and checking they have two-factor authentication applied wherever possible etc, but given the volume and diversity of the potentially vulnerable client base on this occasion it’s worth checking in with family, friends and others in your community to make sure they are doing the same. Nobody wants to be worried about their personal financial info being compromised going into Thanksgiving and Christmas so it can only help to look after each other where you can.”
Comparitech in August published a study of The Gentleman ransomware, which can be read here: https://www.comparitech.com/news/the-gentlemen-ransomware-stats-on-attacks-ransoms-data-breaches/
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