Krebs on Security

SEPTEMBER 27, 2023

The victim shaming site operated by the Snatch ransomware group is leaking data about its true online location and internal operations, as well as the Internet addresses of its visitors, KrebsOnSecurity has found. The leaked data suggest that Snatch is one of several ransomware groups using paid ads on Google.com to trick people into installing malware disguised as popular free software, such as Microsoft Teams , Adobe Reader , Mozilla Thunderbird , and Discord.

Ransomware 250

Ransomware Phishing Access Passwords 250

Krebs on Security

SEPTEMBER 13, 2023

In December 2022, KrebsOnSecurity broke the news that a cybercriminal using the handle “ USDoD ” had infiltrated the FBI ‘s vetted information sharing network InfraGard , and was selling the contact information for all 80,000 members. The FBI responded by reverifying InfraGard members and by seizing the cybercrime forum where the data was being sold.

Passwords 283

Passwords Data breaches Authentication Ransomware 283

Krebs on Security

SEPTEMBER 5, 2023

In November 2022, the password manager service LastPass disclosed a breach in which hackers stole password vaults containing both encrypted and plaintext data for more than 25 million users. Since then, a steady trickle of six-figure cryptocurrency heists targeting security-conscious people throughout the tech industry has led some security experts to conclude that crooks likely have succeeded at cracking open some of the stolen LastPass vaults.

Passwords 346

Passwords Encryption Data breaches Blockchain 346

Krebs on Security

AUGUST 8, 2023

Microsoft Corp. today issued software updates to plug more than 70 security holes in its Windows operating systems and related products, including multiple zero-day vulnerabilities currently being exploited in the wild. Six of the flaws fixed today earned Microsoft’s “critical” rating, meaning malware or miscreants could use them to install software on a vulnerable Windows system without any help from users.

Passwords 191

Passwords Security Risk IT 191

Krebs on Security

AUGUST 3, 2023

Researchers say mobile malware purveyors have been abusing a bug in the Google Android platform that lets them sneak malicious code into mobile apps and evade security scanning tools. Google says it has updated its app malware detection mechanisms in response to the new research. At issue is a mobile malware obfuscation method identified by researchers at ThreatFabric , a security firm based in Amsterdam.

Security 201

Security IT 201

Krebs on Security

JULY 13, 2023

[This is Part II of a story published here last week on reporting that went into a new Hulu documentary series on the 2015 Ashley Madison hack.] It was around 9 p.m. on Sunday, July 19, when I received a message through the contact form on KrebsOnSecurity.com that the marital infidelity website AshleyMadison.com had been hacked. The message contained links to confidential Ashley Madison documents, and included a manifesto that said a hacker group calling itself the Impact Team was prepared to le

Access 186

Access Archiving Data breaches IT 186

Krebs on Security

JULY 3, 2023

If you’ve ever owned a domain name, the chances are good that at some point you’ve received a snail mail letter which appears to be a bill for a domain or website-related services. In reality, these misleading missives try to trick people into paying for useless services they never ordered, don’t need, and probably will never receive.

Passwords 238

Passwords Business Services Data breaches Encryption 238

Krebs on Security

JUNE 22, 2023

The United Parcel Service (UPS) says fraudsters have been harvesting phone numbers and other information from its online shipment tracking tool in Canada to send highly targeted SMS phishing (a.k.a. “smishing”) messages that spoofed UPS and other top brands. The missives addressed recipients by name, included details about recent orders, and warned that those orders wouldn’t be shipped unless the customer paid an added delivery fee.

Phishing 278

Phishing Retail Privacy Communications 278

Krebs on Security

JUNE 21, 2023

If you operate a cybercrime business that relies on disseminating malicious software, you probably also spend a good deal of time trying to disguise or “crypt” your malware so that it appears benign to antivirus and security products. In fact, the process of “crypting” malware is sufficiently complex and time-consuming that most serious cybercrooks will outsource this critical function to a handful of trusted third parties.

Passwords 219

Passwords Cybersecurity e-Delivery Ransomware 219

Krebs on Security

JUNE 8, 2023

It’s not often that a zero-day vulnerability causes a network security vendor to urge customers to physically remove and decommission an entire line of affected hardware — as opposed to just applying software updates. But experts say that is exactly what transpired this week with Barracuda Networks , as the company struggled to combat a sprawling malware threat which appears to have undermined its email security appliances in such a fundamental way that they can no longer be safely u

Security 309

Security Ransomware IT Encryption 309

Krebs on Security

JUNE 6, 2023

One of the most expensive aspects of any cybercriminal operation is the time and effort it takes to constantly create large numbers of new throwaway email accounts. Now a new service offers to help dramatically cut costs associated with large-scale spam and account creation campaigns, by paying people to sell their email account credentials and letting customers temporarily rent access to a vast pool of established accounts at major providers.

Passwords 213

Passwords Access Authentication Sales 213

Krebs on Security

JUNE 1, 2023

Code-signing certificates are supposed to help authenticate the identity of software publishers, and provide cryptographic assurance that a signed piece of software has not been altered or tampered with. Both of these qualities make stolen or ill-gotten code-signing certificates attractive to cybercriminal groups, who prize their ability to add stealth and longevity to malicious software.

Passwords 240

Passwords Ransomware Healthcare Archiving 240

Krebs on Security

MAY 30, 2023

A number of Discord communities focused on cryptocurrency have been hacked this past month after their administrators were tricked into running malicious Javascript code disguised as a Web browser bookmark. This attack involves malicious Javascript that is added to one’s browser by dragging a component from a web page to one’s browser bookmarks.

Phishing 284

Phishing Blockchain Cybersecurity Security 284

Krebs on Security

MAY 16, 2023

A Russian man identified by KrebsOnSecurity in January 2022 as a prolific and vocal member of several top ransomware groups was the subject of two indictments unsealed by the Justice Department today. U.S. prosecutors say Mikhail Pavolovich Matveev , a.k.a. “ Wazawaka ” and “ Boriselcin ” worked with three different ransomware gangs that extorted hundreds of millions of dollars from companies, schools, hospitals and government agencies.

Ransomware 254

Ransomware Security Access Government 254

Krebs on Security

MAY 9, 2023

Microsoft today released software updates to fix at least four dozen security holes in its Windows operating systems and other software, including patches for two zero-day vulnerabilities that are already being exploited in active attacks. First up in May’s zero-day flaws is CVE-2023-29336 , which is an “elevation of privilege” weakness in Windows which has a low attack complexity, requires low privileges, and no user interaction.

Security 218

Security Ransomware Access IT 218

Krebs on Security

MAY 4, 2023

The U.S. government this week put a $10 million bounty on the head of a Russian man who for the past 18 years operated Try2Check , one of the cybercrime underground’s most trusted services for checking the validity of stolen credit card data. U.S. authorities say 43-year-old Denis Kulkov ‘s card-checking service made him at least $18 million, which he used to buy a Ferrari, Land Rover, and other luxury items.

Passwords 234

Passwords Government Ransomware Military 234

Krebs on Security

APRIL 20, 2023

We learned some remarkable new details this week about the recent supply-chain attack on VoIP software provider 3CX. The lengthy, complex intrusion has all the makings of a cyberpunk spy novel: North Korean hackers using legions of fake executive accounts on LinkedIn to lure people into opening malware disguised as a job offer; malware targeting Mac and Linux users working at defense and cryptocurrency firms; and software supply-chain attacks nested within earlier supply chain attacks.

Security 279

Security Encryption Passwords Information Security 279

Krebs on Security

APRIL 18, 2023

For the past seven years, a malware-based proxy service known as “ Faceless ” has sold anonymity to countless cybercriminals. For less than a dollar per day, Faceless customers can route their malicious traffic through tens of thousands of compromised systems advertised on the service. In this post we’ll examine clues left behind over the past decade by the proprietor of Faceless, including some that may help put a face to the name.

Passwords 233

Passwords IoT Security Retail 233

Krebs on Security

APRIL 11, 2023

Microsoft today released software updates to plug 100 security holes in its Windows operating systems and other software, including a zero-day vulnerability that is already being used in active attacks. Not to be outdone, Apple has released a set of important updates addressing two zero-day vulnerabilities that are being used to attack iPhones , iPads and Macs.

Ransomware 233

Ransomware Security Phishing Access 233

Krebs on Security

APRIL 4, 2023

Several domain names tied to Genesis Market , a bustling cybercrime store that sold access to passwords and other data stolen from millions of computers infected with malicious software, were seized by the Federal Bureau of Investigation (FBI) today. Sources tell KrebsOnsecurity the domain seizures coincided with “dozens” of arrests in the United States and abroad targeting those who allegedly operated the service, as well as suppliers who continuously fed Genesis Market with freshly

Marketing 341

Marketing Passwords Authentication Cybersecurity 341

Krebs on Security

MARCH 28, 2023

The United Kingdom’s National Crime Agency (NCA) has been busy setting up phony DDoS-for-hire websites that seek to collect information on users, remind them that launching DDoS attacks is illegal, and generally increase the level of paranoia for people looking to hire such services. The warning displayed to users on one of the NCA’s fake booter sites.

Computer and Electronics 251

Computer and Electronics Marketing Risk Access 251

Krebs on Security

MARCH 15, 2023

Microsoft on Tuesday released updates to quash at least 74 security bugs in its Windows operating systems and software. Two of those flaws are already being actively attacked, including an especially severe weakness in Microsoft Outlook that can be exploited without any user interaction. The Outlook vulnerability ( CVE-2023-23397 ) affects all versions of Microsoft Outlook from 2013 to the newest.

Passwords 235

Passwords Security Authentication Cloud 235

Krebs on Security

MARCH 14, 2023

Two U.S. men have been charged with hacking into a U.S. Drug Enforcement Agency (DEA) online portal that taps into 16 different federal law enforcement databases. Both are alleged to be part of a larger criminal organization that specializes in using fake emergency data requests from compromised police and government email accounts to publicly threaten and extort their victims.

Government 250

Government Security Access Communications 250

Krebs on Security

MARCH 9, 2023

A Croatian national has been arrested for allegedly operating NetWire , a Remote Access Trojan (RAT) marketed on cybercrime forums since 2012 as a stealthy way to spy on infected systems and siphon passwords. The arrest coincided with a seizure of the NetWire sales website by the U.S. Federal Bureau of Investigation (FBI). While the defendant in this case hasn’t yet been named publicly, the NetWire website has been leaking information about the likely true identity and location of its owne

Access 246

Access Passwords Privacy Sales 246

Krebs on Security

MARCH 2, 2023

The Biden administration today issued its vision for beefing up the nation’s collective cybersecurity posture, including calls for legislation establishing liability for software products and services that are sold with little regard for security. The White House’s new national cybersecurity strategy also envisions a more active role by cloud providers and the U.S. military in disrupting cybercriminal infrastructure, and it names China as the single biggest cyber threat to U.S. inter

Cybersecurity 233

Cybersecurity Ransomware Insurance Cloud 233

Krebs on Security

FEBRUARY 28, 2023

Image: Shutterstock.com Three different cybercriminal groups claimed access to internal networks at communications giant T-Mobile in more than 100 separate incidents throughout 2022, new data suggests. In each case, the goal of the attackers was the same: Phish T-Mobile employees for access to internal company tools, and then convert that access into a cybercrime service that could be hired to divert any T-Mobile user’s text messages and phone calls to another device.

Phishing 308

Phishing Authentication Security Access 308

Krebs on Security

FEBRUARY 24, 2023

A security firm has discovered that a six-year-old crafty botnet known as Mylobot appears to be powering a residential proxy service called BHProxies , which offers paying customers the ability to route their web traffic anonymously through compromised computers. Here’s a closer look at Mylobot, and a deep dive into who may be responsible for operating the BHProxies service.

Passwords 226

Passwords Encryption Blockchain Security 226

Krebs on Security

FEBRUARY 14, 2023

Microsoft is sending the world a whole bunch of love today, in the form of patches to plug dozens of security holes in its Windows operating systems and other software. This year’s special Valentine’s Day Patch Tuesday includes fixes for a whopping three different “zero-day” vulnerabilities that are already being used in active attacks.

Security 48

Security Phishing Ransomware Cybersecurity 48

Krebs on Security

JANUARY 25, 2023

On Dec. 23, 2022, KrebsOnSecurity alerted big-three consumer credit reporting bureau Experian that identity thieves had worked out how to bypass its security and access any consumer’s full credit report — armed with nothing more than a person’s name, address, date of birth, and Social Security number. Experian fixed the glitch, but remained silent about the incident for a month.

Security 291

Security Mining Access Paper 291

Krebs on Security

JANUARY 19, 2023

T-Mobile today disclosed a data breach affecting tens of millions of customer accounts, its second major data exposure in as many years. In a filing with federal regulators, T-Mobile said an investigation determined that someone abused its systems to harvest subscriber data tied to approximately 37 million current customer accounts. Image: customink.com In a filing today with the U.S.

Data breaches 299

Data breaches Cybersecurity Passwords Security 299

Krebs on Security

JANUARY 10, 2023

Microsoft today released updates to fix nearly 100 security flaws in its Windows operating systems and other software. Highlights from the first Patch Tuesday of 2023 include a zero-day vulnerability in Windows, printer software flaws reported by the U.S. National Security Agency , and a critical Microsoft SharePoint Server bug that allows a remote, unauthenticated attacker to make an anonymous connection.

Encryption 238

Encryption Security Access IT 238

Krebs on Security

DECEMBER 19, 2022

Photo: BrandonKleinPhoto / Shutterstock.com. Two U.S. men have been charged with hacking into the Ring home security cameras of a dozen random people and then “swatting” them — falsely reporting a violent incident at the target’s address to trick local police into responding with force. Prosecutors say the duo used the compromised Ring devices to stream live video footage on social media of police raiding their targets’ homes, and to taunt authorities when they arri

Passwords 286

Passwords Access Security IT 286

Krebs on Security

DECEMBER 8, 2022

Ransomware groups are constantly devising new methods for infecting victims and convincing them to pay up, but a couple of strategies tested recently seem especially devious. The first centers on targeting healthcare organizations that offer consultations over the Internet and sending them booby-trapped medical records for the “patient.” The other involves carefully editing email inboxes of public company executives to make it appear that some were involved in insider trading.

Ransomware 263

Ransomware Metadata Encryption Security 263

Krebs on Security

DECEMBER 5, 2022

In December 2021, Google filed a civil lawsuit against two Russian men thought to be responsible for operating Glupteba , one of the Internet’s largest and oldest botnets. The defendants, who initially pursued a strategy of counter suing Google for interfering in their sprawling cybercrime business, later brazenly offered to dismantle the botnet in exchange for payment from Google.

IoT 233

IoT Passwords Access Mining 233

Krebs on Security

NOVEMBER 16, 2022

A financial cybercrime group calling itself the Disneyland Team has been making liberal use of visually confusing phishing domains that spoof popular bank brands using Punycode , an Internet standard that allows web browsers to render domain names with non-Latin alphabets like Cyrillic. The Disneyland Team’s Web interface, which allows them to interact with malware victims in real time to phish their login credentials using phony bank websites.

Phishing 270

Phishing Security Authentication Passwords 270

Krebs on Security

NOVEMBER 10, 2022

A nonprofit organization is suing the state of Massachusetts on behalf of thousands of low-income families who were collectively robbed of more than a $1 million in food assistance benefits by card skimming devices secretly installed at cash machines and grocery store checkout lanes across the state. Federal law bars states from replacing these benefits using federal funds, and a recent rash of skimming incidents nationwide has disproportionately affected those receiving food assistance via stat

Agriculture 210

Agriculture Security Libraries Risk 210

Krebs on Security

NOVEMBER 4, 2022

Responding to a recent surge in AI-generated bot accounts, LinkedIn is rolling out new features that it hopes will help users make more informed decisions about with whom they choose to connect. Many LinkedIn profiles now display a creation date, and the company is expanding its domain validation offering, which allows users to publicly confirm that they can reply to emails at the domain of their stated current employer.

Artificial Intelligence 227

Artificial Intelligence Cybersecurity Information Security Security 227