Microsoft today released updates to plug at least 110 security holes in its Windows operating systems and other products. The patches include four security fixes for Microsoft Exchange Server — the same systems that have been besieged by attacks on four separate (and zero-day) bugs in the email software over …

Someone is selling account information for 21 million customers of ParkMobile, a mobile parking app that’s popular in North America. The stolen data includes customer email addresses, dates of birth, phone numbers, license plate numbers, hashed passwords and mailing addresses. KrebsOnSecurity first heard about the breach from Gemini …

Ne’er-do-wells leaked personal data — including phone numbers — for some 553 million Facebook users this week. Facebook says the data was collected before 2020 when it changed things to prevent such information from being scraped from profiles. To my mind, this just reinforces the need to remove mobile phone …

Some of the top ransomware gangs are deploying a new pressure tactic to push more victim organizations into paying an extortion demand: Emailing the victim’s customers and partners directly, warning that their data will be leaked to the dark web unless they can convince the victim firm to …

For four days this past week, Internet-of-Things giant Ubiquiti did not respond to requests for comment on a whistleblower’s allegations the company had massively downplayed a “catastrophic” two-month breach ending in January to save its stock price, and that Ubiquiti’s insinuation that a third-party was to blame …

Dear Readers, this has been long overdue, but at last I give you a more responsive, mobile-friendly version of KrebsOnSecurity. We tried to keep the visual changes to a minimum and focus on a simple theme that presents information in a straightforward, easy-to-read format. Please bear with us over …

On Jan. 11, Ubiquiti Inc. [NYSE:UI] — a major vendor of cloud-enabled Internet of Things (IoT) devices such as routers, network video recorders and security cameras — disclosed that a breach involving a third-party cloud provider had exposed customer account credentials. Now a source who participated in the response to …

New data suggests someone has compromised more than 21,000 Microsoft Exchange Server email systems worldwide and infected them with malware that invokes both KrebsOnSecurity and Yours Truly by name. Let’s just get this out of the way right now: It wasn’t me. The Shadowserver Foundation, a …

A phishing attack last week gave attackers access to email and files at the California State Controller’s Office (SCO), an agency responsible for handling more than $100 billion in public funds each year. The phishers had access for more than 24 hours, and sources tell KrebsOnSecurity the intruders …

Remember Norse Corp., the company behind the interactive “pew-pew” cyber attack map shown in the image below? Norse imploded rather suddenly in 2016 following a series of managerial missteps and funding debacles. Now, the founders of Norse have launched a new company with a somewhat different vision: RedTorch, which …

If you sell Web-based software for a living and ship code that references an unregistered domain name, you are asking for trouble. But when the same mistake is made by a Fortune 500 company, the results can range from costly to disastrous. Here’s the story of one such …

SMS text messages were already the weakest link securing just about anything online, mainly because there are tens of thousands of people (many of them low-paid mobile store employees) who can be tricked or bribed into swapping control over a mobile phone number to someone else. Now we’re …

A little over a year ago, the FBI and law enforcement partners overseas seized WeLeakInfo[.]com, a wildly popular service that sold access to more than 12 billion usernames and passwords stolen from thousands of hacked websites. In an ironic turn of events, a lapsed domain registration tied to …

On the off chance you were looking for more security to-dos from Microsoft today...the company released software updates to plug more than 82 security flaws in Windows and other supported software. Ten of these earned Microsoft’s “critical” rating, meaning they can be exploited by malware or miscreants …

Globally, hundreds of thousand of organizations running Exchange email servers from Microsoft just got mass-hacked, including at least 30,000 victims in the United States. Each hacked server has been retrofitted with a “web shell” backdoor that gives the bad guys total, remote control, the ability to read all …

Sometimes when a complex story takes us by surprise or knocks us back on our heels, it pays to revisit the events in a somewhat linear fashion. Here’s a brief timeline of what we know leading up to last week’s mass-hack, when hundreds of thousands of Microsoft …

At least 30,000 organizations across the United States — including a significant number of small businesses, towns, cities and local governments — have over the past few days been hacked by an unusually aggressive Chinese cyber espionage unit that’s focused on stealing email from victim organizations, multiple sources tell …

Over the past few weeks, three of the longest running and most venerated Russian-language online forums serving thousands of experienced cybercriminals have been hacked. In two of the intrusions, the attackers made off with the forums’ user databases, including email and Internet addresses and hashed passwords. Members of all …

Microsoft Corp. today released software updates to plug four security holes that attackers have been using to plunder email communications at companies that use its Exchange Server products. The company says all four flaws are being actively exploited as part of a complex attack chain deployed by a previously …

PrismHR, a company that sells technology used by other firms to help more than 80,000 small businesses manage payroll, benefits, and human resources, has suffered what appears to be an ongoing ransomware attack that is disrupting many of its services. Hopkinton, Mass.-based PrismHR handles everything from payroll …

A company that rents out access to more than 10 million Web browsers so that clients can hide their true Internet addresses has built its network by paying browser extension makers to quietly include its code in their creations. This story examines the lopsided economics of extension development, and …

The U.S. Labor Department’s inspector general said this week that roughly $100 million in fraudulent unemployment insurance claims were paid in 2020 to criminals who are already in jail. That’s a tiny share of the estimated tens of billions of dollars in jobless benefits states have …

Easily the most sophisticated skimming devices made for hacking terminals at retail self-checkout lanes are a new breed of PIN pad overlay combined with a flexible, paper-thin device that fits inside the terminal’s chip reader slot. What enables these skimmers to be so slim? They draw their power …

The leader of Mexico’s Green Party has been removed from office following allegations that he received money from a Romanian ATM skimmer gang that stole hundreds of millions of dollars from tourists visiting Mexico’s top tourist destinations over the past five years. The scandal is the latest …

The U.S. Justice Department today unsealed indictments against three men accused of working with the North Korean regime to carry out some of the most damaging cybercrime attacks over the past decade, including the 2014 hack of Sony Pictures, the global WannaCry ransomware contagion of 2017, and the …