Attackers claim to have compromised mobile devices Credit: Thinkstock The official Twitter account for the U.S. Central Command (CENTCOM) was compromised Monday afternoon, by attackers claiming to support the terrorist group ISIS.In a series of messages posted to the compromised account, the attackers published images of documents, which were allegedly taken from hijacked mobile devices.The person(s) claiming responsibility for the attack later posted a warning to American soldiers on Pastebin, that ISIS was already in their PCs, and that the Pentagon networks were hacked.The statement: “In the name of Allah, the Most Gracious, the Most Merciful, the CyberCaliphate under the auspices of ISIS continues its CyberJihad. While the US and its satellites kill our brothers in Syria, Iraq and Afghanistan we broke into your networks and personal devices and know everything about you. You’ll see no mercy infidels. ISIS is already here, we are in your PCs, in each military base. With Allah’s permission we are in CENTCOM now. We won’t stop! We know everything about you, your wives and children. U.S. soldiers! We’re watching you! There is no God but Allah and Muhammad is his Prophet! There is no law but Sharia!”Archives released by the attacker(s) are said to have been taken from mobile devices. Many of the leaked documents are PDF files, which are archives of PowerPoint presentations and speech drafts. On Twitter, the attacker(s) have posted images which are said to be internal communications.None of the documents seen by CSO Online were marked by any sort of classification, suggesting that the documents themselves are part of normal operations. However, the attacker(s) have also posted random office images, suggesting that personal, as well as official data has been compromised. The real concern is the claim that the attackers obtained their data mobile devices, which if true, could place hundreds of employees (including civilians) at risk. However, there is no way to verify their claims at this time. As this story was going to press, Twitter was taking action to recover the US CENTCOM account.CSO Online is following this story and will update if there are further developments.Update:The attacker(s) also targeted the CENTCOM YouTube account. Both the compromised Twitter and YouTube accounts have been taken offline.U.S. Central Command also issued a statement confirming the incident.“We can confirm that the CENTCOM Twitter and YouTube accounts were compromised earlier today. We are taking appropriate measures to address the matter. We have no further information to provide at this time.”Additional documents released by the attacker(s) before the accounts were taken offline included PowerPoint files of various reports outlining budgets and strategy. However, again, none of the items leaked contained any classification marks. Update 2:Additional research into the leaked documents by CSO Online has confirmed that most of them, more than 90 percent to be exact, are public documents. As an example, here is the FY2015 budget amendments [PDF]. Related content news UK government plans 2,500 new tech recruits by 2025 with focus on cybersecurity New apprenticeships and talent programmes will support recruitment for in-demand roles such as cybersecurity technologists and software developers By Michael Hill Sep 29, 2023 4 mins Education Industry Education Industry Education Industry news UK data regulator orders end to spreadsheet FOI requests after serious data breaches The Information Commissioner’s Office says alternative approaches should be used to publish freedom of information data to mitigate risks to personal information By Michael Hill Sep 29, 2023 3 mins Government Cybercrime Data and Information Security feature Cybersecurity startups to watch for in 2023 These startups are jumping in where most established security vendors have yet to go. By CSO Staff Sep 29, 2023 19 mins CSO and CISO Security news analysis Companies are already feeling the pressure from upcoming US SEC cyber rules New Securities and Exchange Commission cyber incident reporting rules don't kick in until December, but experts say they highlight the need for greater collaboration between CISOs and the C-suite By Cynthia Brumfield Sep 28, 2023 6 mins Regulation Data Breach Financial Services Industry Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe