Those Microsoft Exchange security system flaw youmay have take heed aboutare really getting pommel . If ever there was a clock time for cybersecurity newsman to trot out metaphor involving phrases like “ blood in the water ” and maybe “ deranged swarm of piranhas , ” it might be decent now .

At least 10 separate advanced persistent threat actors ( a fancy terminus for well - organized hacker chemical group ) are targeting the email Cartesian product ’s vulnerabilities , according toa recent study fromsecurity firm ESET . This is contrary to what Microsoft ab initio said , which is that the flaws were mainly being targeted by one mathematical group , a “ state - patronise ” threat actor located in China that they are call off “ HAFNIUM . ”

https://gizmodo.com/microsofts-crazy-huge-hack-explained-1846422574

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Photo: Jeenah Moon (Getty Images)

Instead , ESET report that Exchange is basically getting rifle by close to a dozen different groups , all of which have names that fathom like bad gamertags , include Tick , LuckyMouse , Calypso , Websiic , Winnti , TontoTeam , Mikroceen and DLTMiner . There are also apparently two other cyber-terrorist groups that have not yet been name . So , yeah , it ’s a reasonably large flock .

The hacking seems to have picked up directly after Microsoft release its dapple , too , as ESET ’s report states that “ the Clarence Shepard Day Jr. after the release of the spot ” security investigator “ bulge to see many more threat actors ( including Tonto Team and Mikroceen ) scan and compromise Exchange servers en masse shot . ”

Anew report fromsecurity researchers with DomainTools has also thrown frigid pee on the theme that “ HAFNIUM ” is actually a hack group consort with the Formosan government . So , on top of everything else , it ’s not even clear who or what “ HAFNIUM ” is :

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“ While such a link [ to the PRC ] is certainly potential and has not been ruled out , as of this penning no conclusive evidence has emerge yoke HAFNIUM operations to the People ’s Republic of China ( PRC ) . And HAFNIUM is also far from the only entity assessed to be point this vulnerability . ”

Who is getting targeted ? According to awarningfrom the FBI published Wednesday , it would seem the answer is : moderately much everybody .

terror actor have targeted local government , pedantic institutions , non - governmental organizations , and line of work entities in multiple industry sector , admit Department of Agriculture , biotechnology , aerospace , demurrer , legal service , power utilities , and pharmaceutic .

Argentina’s President Javier Milei (left) and Robert F. Kennedy Jr., holding a chainsaw in a photo posted to Kennedy’s X account on May 27. 2025.

https://gizmodo.com/the-latest-microsoft-hack-looks-like-it-could-be-huge-1846397829

While the entity in the U.S. say to be affected number 30,000 or more , it ’s so far been a slow trickle of disclosures — though local governments and small businessesare recall to besome of the more hard targeted . On Wednesday , U.S. officialssaid that , so far , there is no evidence of federal executive agencies having been compromised by the onslaught .

Computer securityComputingData securityHackingIn scienceMicrosoftVulnerability

William Duplessie

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