In late December 2019, fuel and convenience store chain Wawa Inc. said a nine-month-long breach of its payment card processing systems may have led to the theft of card data from customers who visited any of its 850 locations nationwide. Now,...

Aleksei Burkov, an ultra-connected Russian hacker once described as "an asset of supreme importance" to Moscow, has pleaded guilty in a U.S. court to running a site that sold stolen payment card data and to administering a highly secretive crime...

If you're running a business online, few things can be as disruptive or destructive to your brand as someone stealing your company's domain name and doing whatever they wish with it. Even so, most major Web site owners aren't taking...

Apple is rolling out a new update to its iOS operating system that addresses the location privacy issue on iPhone 11 devices that was first detailed here last month.

A Georgia man who co-founded a service designed to protect companies from crippling distributed denial-of-service (DDoS) attacks has pleaded to paying a DDoS-for-hire service to launch attacks against others.

Microsoft today released updates to plug 50 security holes in various flavors of Windows and related software. The patch batch includes a fix for a flaw in Windows 10 and server equivalents of this operating system that prompted an unprecedented...

Sources tell KrebsOnSecurity that Microsoft Corp. is slated to release a software update on Tuesday to fix an extraordinarily serious security vulnerability in a core cryptographic component present in all versions of Windows. Those sources say Microsoft has quietly shipped a...

Anyone searching for a primer on how to spot clever phishing links need look no further than those targeting customers of Apple, whose brand by many measures has emerged as the most targeted. Past stories here have examined how scammers...

Federal investigators on Friday arrested a Virginia man accused of being part of a neo-Nazi group that targeted hundreds of people in "swatting" attacks, wherein fake bomb threats, hostage situations and other violent scenarios were phoned in to police as...

Crooks have stolen tens of millions of dollars and other valuable commodities from thousands of consumers via "SIM swapping," a particularly invasive form of fraud that involves tricking a target's mobile carrier into transferring someone's wireless service to a device...

Late last year saw the re-emergence of a nasty phishing tactic that allows the attacker to gain full access to a user's data stored in the cloud without actually stealing the account password. The phishing lure starts with a link...

Organizations in the throes of cleaning up after a ransomware outbreak typically will change passwords for all user accounts that have access to any email systems, servers and desktop workstations within their network. But all too often, ransomware victims fail...

Today marks the 10th anniversary of KrebsOnSecurity.com! Over the past decade, the site has featured more than 1,800 stories focusing mainly on cybercrime, computer security and user privacy concerns. And what a decade it has been. Stories here have exposed...

Synoptek, a California business that provides cloud hosting and IT management services to more than a thousand customer nationwide, suffered a ransomware attack this week that has disrupted operations for many of its clients, according to sources. The company has...

Last summer, a wave of sextortion emails began flooding inboxes around the world. The spammers behind this scheme claimed they'd hacked your computer and recorded videos of you watching porn, and promised to release the embarrassing footage to all your...

As if the scourge of ransomware wasn't bad enough already: Several prominent purveyors of ransomware have signaled they plan to start publishing data stolen from victims who refuse to pay up. To make matters worse, one ransomware gang has now...

The U.S. Justice Department this month offered a $5 million bounty for information leading to the arrest and conviction of a Russian man indicted for allegedly orchestrating a vast, international cybercrime network that called itself "Evil Corp" and stole roughly...

A top executive at the nonprofit entity responsible for doling out chunks of Internet addresses to businesses and other organizations in Africa has resigned his post following accusations that he secretly operated several companies which sold tens of millions of...

Microsoft today released updates to plug three dozen security holes in its Windows operating system and other software. The patches include fixes for seven critical bugs — those that can be exploited by malware or miscreants to take control over...

CISO Magazine, a publication dedicated to covering issues near and dear to corporate chief information security officers everywhere, has graciously awarded this author the designation of "Cybersecurity Person of the Year" in its December 2019 issue.

A Colorado company that specializes in providing IT services to dental offices suffered a ransomware attack this week that is disrupting operations for more than 100 dentistry practices, KrebsOnSecurity has learned. Multiple sources affected say their IT provider, Englewood, Colo....

KrebsOnSecurity ran a story this week that puzzled over Apple's response to inquiries about a potential privacy leak in its new iPhone 11 line, in which the devices appear to intermittently seek the user's location even when all applications and...

One of the more curious behaviors of Apple's new iPhone 11 Pro is that it intermittently seeks the user's location information even when all applications and system services on the phone are individually set to never request this data. Apple...

Many readers probably believe they can trust links and emails coming from U.S. federal government domain names, or else assume there are at least more stringent verification requirements involved in obtaining a .gov domain versus a commercial one ending in...

On Nov. 23, one of the cybercrime underground's largest bazaars for buying and selling stolen payment card data announced the immediate availability of some four million freshly-hacked debit and credit cards. KrebsOnSecurity has learned this latest batch of cards was...

Tiny hidden spy cameras are a common sight at ATMs that have been tampered with by crooks who specialize in retrofitting the machines with card skimmers. But until this past week I'd never heard of hidden cameras being used at...

A ransomware outbreak has besieged a Wisconsin based IT company that provides cloud data hosting, security and access management to more than 100 nursing homes across the United States. The ongoing attack is preventing these care centers from accessing crucial...

A 21-year-old Illinois man was sentenced last week to 13 months in prison for running multiple DDoS-for-hire services that launched millions of attacks over several years. This individual's sentencing comes more than five years after KrebsOnSecurity interviewed both the defendant...

National Veterinary Associates (NVA), a California company that owns more than 700 animal care facilities around the globe, is still working to recover from a ransomware attack late last month that affected more than half of those properties, separating many...

The Russian government has for the past four years been fighting to keep 29-year-old alleged cybercriminal Alexei Burkov from being extradited by Israel to the United States. When Israeli authorities turned down requests to send him back to Russia -- supposedly...