A reader forwarded what he briefly imagined might be a bold, if potentially costly, innovation on the old Nigerian prince scam that asks for help squirreling away millions in unclaimed fortune: It was sent via the U.S. Postal Service, with a postmarked stamp and everything. In truth these old fashio...

An Ohio teen who recruited a convicted serial “swatter “to fake a distress call that ended in the police shooting an innocent Kansas man in 2017 has been sentenced to 15 months in prison. Image: FBI.gov “Swatting” is a dangerous hoax that involves making false claims to emerg...

MyPayrollHR, a now defunct cloud-based payroll processing firm based in upstate New York, abruptly ceased operations this past week after stiffing employees at thousands of companies. The ongoing debacle, which allegedly involves malfeasance on the part of the payroll company’s CEO, resulted i...

Microsoft today issued security updates to plug some 80 security holes in various flavors of its Windows operating systems and related software. The software giant assigned a “critical” rating to almost a quarter of those vulnerabilities, meaning they could be used by malware or miscrean...

The U.S. Secret Service is investigating a breach at a Virginia-based government technology contractor that saw access to several of its systems put up for sale in the cybercrime underground, KrebsOnSecurity has learned. The contractor claims the access being auctioned off was to old test systems th...

A 21-year-old man from Vancouver, Wash. has pleaded guilty to federal hacking charges tied to his role in operating the “Satori” botnet, a crime machine powered by hacked Internet of Things (IoT) devices that was built to conduct massive denial-of-service attacks targeting Internet servi...

Many spam trends are cyclical: Spammers tend to switch tactics when one method of hijacking your time and attention stops working. But periodically they circle back to old tricks, and few spam trends are as perennial as calendar spam, in which invitations to click on dodgy links show up unbidden in ...

Federal prosecutors in California have filed criminal charges against four employees of Adconion Direct, an email advertising firm, alleging they unlawfully hijacked vast swaths of Internet addresses and used them in large-scale spam campaigns. KrebsOnSecurity has learned that the charges are likely...

Many companies are now outsourcing their marketing efforts to cloud-based Customer Relationship Management (CRM) providers. But when accounts at those CRM providers get hacked or phished, the results can be damaging for both the client’s brand and their customers. Here’s a look at a rece...

PerCSoft, a Wisconsin-based company that manages a remote data backup service relied upon by hundreds of dental offices across the country, is struggling to restore access to client systems after falling victim to a ransomware attack. West Allis, Wis.-based PerCSoft is a cloud management provider fo...

Imperva, a leading provider of Internet firewall services that help Web sites block malicious cyberattacks, alerted customers on Tuesday that a recent data breach exposed email addresses, scrambled passwords, API keys and SSL certificates for a subset of its firewall users. Redwood Shores, Calif.-ba...

On Tuesday of this week, one of the more popular underground stores peddling credit and debit card data stolen from hacked merchants announced a blockbuster new sale: More than 5.3 million new accounts belonging to cardholders from 35 U.S. states. Multiple sources now tell KrebsOnSecurity that the c...

Almost weekly now I hear from an indignant reader who suspects a data breach at a Web site they frequent that has just asked the reader to reset their password. Further investigation almost invariably reveals that the password reset demand was not the result of a breach but rather the site’s e...

Cybercrooks increasingly are anonymizing their malicious traffic by routing it through residential broadband and wireless data connections. Traditionally, those connections have been mainly hacked computers, mobile phones, or home routers. But this story is about so-called “bulletproof residen...

“Bluetana,” a new mobile app that looks for Bluetooth-based payment card skimmers hidden inside gas pumps, is helping police and state employees more rapidly and accurately locate compromised fuel stations across the nation, a study released this week suggests. Data collected in the cour...

Most Microsoft Windows (ab)users probably welcome the monthly ritual of applying security updates about as much as they look forward to going to the dentist: It always seems like you were there just yesterday, and you never quite know how it’s all going to turn out. Fortunately, this month&rsq...

The U.S. Securities and Exchange Commission (SEC) is investigating a security failure on the Web site of real estate title insurance giant First American Financial Corp. that exposed more than 885 million personal and financial records tied to mortgage deals going back to 2003, KrebsOnSecurity has l...

A ransomware outbreak that hit QuickBooks cloud hosting firm iNSYNQ in mid-July appears to have started with an email phishing attack that snared an employee working in sales for the company, KrebsOnSecurity has learned. It also looks like the intruders spent roughly ten days rooting aroun...

Incessantly annoying and fraudulent robocalls. Corrupt wireless company employees taking hundreds of thousands of dollars in bribes to unlock and hijack mobile phone service. Wireless providers selling real-time customer location data, despite repeated promises to the contrary. A noticeable uptick i...

If you bank online and choose weak or re-used passwords, there’s a decent chance your account could be pilfered by cyberthieves — even if your bank offers multi-factor authentication as part of its login process. This story is about how crooks increasingly are abusing third-party financi...

On Monday, a former Amazon employee was arrested and charged with stealing more than 100 million consumer applications for credit from Capital One. Since then, many have speculated the breach was perhaps the result of a previously unknown “zero-day” flaw, or an “insi...

Federal prosecutors this week charged a Seattle woman with stealing data from more than 100 million credit applications made with Capital One Financial Corp. Incredibly, much of this breached played out publicly over several months on social media and other open online platforms. What follows is a c...

Marcus Hutchins, the “accidental hero” who helped arrest the spread of the global WannaCry ransomware outbreak in 2017, will receive no jail time for his admitted role in authoring and selling malware that helped cyberthieves steal online bank account credentials from victims, a federal ...

Much has been written about the need to further secure our elections, from ensuring the integrity of voting machines to combating fake news. But according to a report quietly issued by a California grand jury this week, more attention needs to be paid to securing social media and email accounts used...

Nearly three dozen journalists at a broad range of major publications have been targeted by a far-right group that maintains a Deep Web database listing the personal information of people who threaten their views. This group specializes in encouraging others to harass those targeted by their ire, an...

Big-three credit bureau Equifax has reportedly agreed to pay at least $650 million to settle lawsuits stemming from a 2017 breach that let intruders steal personal and financial data on roughly 148 million Americans. Here’s a brief primer that attempts to break down what this settlement means ...

Cloud hosting provider iNSYNQ says it is trying to recover from a ransomware attack that shut down its network and has left customers unable to access their accounting data for the past three days. Unfortunately for iNSYNQ, the company appears to be turning a deaf ear to the increasingly anxious cri...

“It takes a certain kind of man with a certain reputationTo alleviate the cash from a whole entire nation…” KrebsOnSecurity has seen some creative yet truly bizarre ads for dodgy services in the cybercrime underground, but the following animated advertisement for a popular credit ...

For at least the past decade, a computer crook variously known as “Yalishanda,” “Downlow” and “Stas_vl” has run one of the most popular “bulletproof” Web hosting services catering to a vast array of phishing sites, cybercrime forums and malware downloa...

The cybercriminals behind the GandCrab ransomware-as-a-service (RaaS) offering recently announced they were closing up shop and retiring after having allegedly earned more than $2 billion in extortion payments from victims. But a growing body of evidence suggests the GandCrab team have instead quiet...