Aisuru Botnet Shifts from DDoS to Residential Proxies
Oct 29, 2025 | Krebs on Security
Aisuru, the botnet responsible for a series of record-smashing distributed denial-of-service (DDoS) attacks this year, recently was overhauled to support a more low-key, lucrative and sustainable business: Renting hundreds of thousands of infected Internet of Things (IoT) devices to proxy services that help cybercriminals anonymize their traffic. Experts says a glut of proxies from Aisuru and other sources is fueling large-scale data harvesting efforts tied to various artificial intelligence (AI) projects, helping content scrapers evade detection by routing their traffic through residential connections that appear to be regular Internet users.
Alleged Jabber Zeus Coder ‘MrICQ’ in U.S. Custody
Nov 02, 2025 | Krebs on Security
A Ukrainian man indicted in 2012 for conspiring with a prolific hacking group to steal tens of millions of dollars from U.S. businesses was arrested in Italy and is now in custody in the United States, KrebsOnSecurity has learned. Sources close to the investigation say Yuriy Igorevich Rybtsov, a 41-year-old from the Russia-controlled city of Donetsk, Ukraine, was previously referenced in U.S. federal charging documents only by his online handle "MrICQ." According to a 13-year-old indictment filed by prosecutors in Nebraska, MrICQ was a developer for a cybercrime group known as "Jabber Zeus."
Cloudflare Scrubs Aisuru Botnet from Top Domains List
Nov 06, 2025 | Krebs on Security
For the past week, domains associated with the massive Aisuru botnet have repeatedly usurped Amazon, Apple, Google and Microsoft in Cloudflare's public ranking of the most frequently requested websites. Cloudflare responded by redacting Aisuru domain names from their top websites list. The chief executive at Cloudflare says Aisuru's overlords are using the botnet to boost their malicious domain rankings, while simultaneously attacking the company's domain name system (DNS) service.
Drilling Down on Uncle Sam’s Proposed TP-Link Ban
Nov 09, 2025 | Krebs on Security
The U.S. government is reportedly preparing to ban the sale of wireless routers and other networking gear from TP-Link Systems, a tech company that currently enjoys an estimated 50% market share among home users and small businesses. Experts say while the proposed ban may have more to do with TP-Link's ties to China than any specific technical threats, much of the rest of the industry serving this market also sources hardware from China and ships products that are insecure fresh out of the box.
Google Sues to Disrupt Chinese SMS Phishing Triad
Nov 13, 2025 | Krebs on Security
Google is suing more than two dozen unnamed individuals allegedly involved in peddling a popular China-based mobile phishing service that helps scammers impersonate hundreds of trusted brands, blast out text message lures, and convert phished payment card data into mobile wallets from Apple and Google.
Microsoft Patch Tuesday, November 2025 Edition
Nov 16, 2025 | Krebs on Security
Microsoft this week pushed security updates to fix more than 60 vulnerabilities in its Windows operating systems and supported software, including at least one zero-day bug that is already being exploited. Microsoft also fixed a glitch that prevented some Windows 10 users from taking advantage of an extra year of security updates, which is nice because the zero-day flaw and other critical weaknesses patched today affect all versions of Windows, including Windows 10.
The Cloudflare Outage May Be a Security Roadmap
Nov 19, 2025 | Krebs on Security
An intermittent outage at Cloudflare on Tuesday briefly knocked many of the Internet's top destinations offline. Some affected Cloudflare customers were able to pivot away from the platform temporarily so that visitors could still access their websites. But security experts say doing so may have also triggered an impromptu network penetration test for organizations that have come to rely on Cloudflare to block many types of abusive and malicious traffic.
Mozilla Says It’s Finally Done With Two-Faced Onerep
Nov 20, 2025 | Krebs on Security
In March 2024, Mozilla said it was winding down its collaboration with Onerep -- an identity protection service offered with the Firefox web browser that promises to remove users from hundreds of people-search sites -- after KrebsOnSecurity revealed Onerep's founder had created dozens of people-search services and was continuing to operate at least one of them. Sixteen months later, however, Mozilla is still promoting Onerep. This week, Mozilla announced their partnership with Onerep will officially end next month.
Is Your Android TV Streaming Box Part of a Botnet?
Nov 24, 2025 | Krebs on Security
On the surface, the Superbox media streaming devices for sale at retailers like BestBuy and Walmart may seem like a steal: They offer unlimited access to more than 2,200 pay-per-view and streaming services like Netflix, ESPN and Hulu, all for a one-time fee of around $400. But security experts warn these TV boxes require intrusive software that forces the user's network to relay Internet traffic for others, traffic that is often tied to cybercrime activity such as advertising fraud and account takeovers.
Meet Rey, the Admin of ‘Scattered Lapsus$ Hunters’
Nov 26, 2025 | Krebs on Security
A prolific cybercriminal group that calls itself "Scattered LAPSUS$ Hunters" made headlines regularly this year by stealing data from and publicly mass extorting dozens of major corporations. But the tables seem to have turned somewhat for "Rey," the moniker chosen by the technical operator and public face of the hacker group: Earlier this week, Rey confirmed his real life identity and agreed to an interview after KrebsOnSecurity tracked him down and contacted his father.
Meet Rey, the Admin of ‘Scattered Lapsus$ Hunters’
Nov 26, 2025 | Krebs on Security
A prolific cybercriminal group that calls itself "Scattered LAPSUS$ Hunters" made headlines regularly this year by stealing data from and publicly mass extorting dozens of major corporations. But the tables seem to have turned somewhat for "Rey," the moniker chosen by the technical operator and public face of the hacker group: Earlier this week, Rey confirmed his real life identity and agreed to an interview after KrebsOnSecurity tracked him down and contacted his father.
Is Your Android TV Streaming Box Part of a Botnet?
Nov 24, 2025 | Krebs on Security
On the surface, the Superbox media streaming devices for sale at retailers like BestBuy and Walmart may seem like a steal: They offer unlimited access to more than 2,200 pay-per-view and streaming services like Netflix, ESPN and Hulu, all for a one-time fee of around $400. But security experts warn these TV boxes require intrusive software that forces the user's network to relay Internet traffic for others, traffic that is often tied to cybercrime activity such as advertising fraud and account takeovers.
Mozilla Says It’s Finally Done With Two-Faced Onerep
Nov 20, 2025 | Krebs on Security
In March 2024, Mozilla said it was winding down its collaboration with Onerep -- an identity protection service offered with the Firefox web browser that promises to remove users from hundreds of people-search sites -- after KrebsOnSecurity revealed Onerep's founder had created dozens of people-search services and was continuing to operate at least one of them. Sixteen months later, however, Mozilla is still promoting Onerep. This week, Mozilla announced their partnership with Onerep will officially end next month.
The Cloudflare Outage May Be a Security Roadmap
Nov 19, 2025 | Krebs on Security
An intermittent outage at Cloudflare on Tuesday briefly knocked many of the Internet's top destinations offline. Some affected Cloudflare customers were able to pivot away from the platform temporarily so that visitors could still access their websites. But security experts say doing so may have also triggered an impromptu network penetration test for organizations that have come to rely on Cloudflare to block many types of abusive and malicious traffic.
Microsoft Patch Tuesday, November 2025 Edition
Nov 16, 2025 | Krebs on Security
Microsoft this week pushed security updates to fix more than 60 vulnerabilities in its Windows operating systems and supported software, including at least one zero-day bug that is already being exploited. Microsoft also fixed a glitch that prevented some Windows 10 users from taking advantage of an extra year of security updates, which is nice because the zero-day flaw and other critical weaknesses patched today affect all versions of Windows, including Windows 10.
Google Sues to Disrupt Chinese SMS Phishing Triad
Nov 13, 2025 | Krebs on Security
Google is suing more than two dozen unnamed individuals allegedly involved in peddling a popular China-based mobile phishing service that helps scammers impersonate hundreds of trusted brands, blast out text message lures, and convert phished payment card data into mobile wallets from Apple and Google.
Drilling Down on Uncle Sam’s Proposed TP-Link Ban
Nov 09, 2025 | Krebs on Security
The U.S. government is reportedly preparing to ban the sale of wireless routers and other networking gear from TP-Link Systems, a tech company that currently enjoys an estimated 50% market share among home users and small businesses. Experts say while the proposed ban may have more to do with TP-Link's ties to China than any specific technical threats, much of the rest of the industry serving this market also sources hardware from China and ships products that are insecure fresh out of the box.
Cloudflare Scrubs Aisuru Botnet from Top Domains List
Nov 06, 2025 | Krebs on Security
For the past week, domains associated with the massive Aisuru botnet have repeatedly usurped Amazon, Apple, Google and Microsoft in Cloudflare's public ranking of the most frequently requested websites. Cloudflare responded by redacting Aisuru domain names from their top websites list. The chief executive at Cloudflare says Aisuru's overlords are using the botnet to boost their malicious domain rankings, while simultaneously attacking the company's domain name system (DNS) service.
Alleged Jabber Zeus Coder ‘MrICQ’ in U.S. Custody
Nov 02, 2025 | Krebs on Security
A Ukrainian man indicted in 2012 for conspiring with a prolific hacking group to steal tens of millions of dollars from U.S. businesses was arrested in Italy and is now in custody in the United States, KrebsOnSecurity has learned. Sources close to the investigation say Yuriy Igorevich Rybtsov, a 41-year-old from the Russia-controlled city of Donetsk, Ukraine, was previously referenced in U.S. federal charging documents only by his online handle "MrICQ." According to a 13-year-old indictment filed by prosecutors in Nebraska, MrICQ was a developer for a cybercrime group known as "Jabber Zeus."
Aisuru Botnet Shifts from DDoS to Residential Proxies
Oct 29, 2025 | Krebs on Security
Aisuru, the botnet responsible for a series of record-smashing distributed denial-of-service (DDoS) attacks this year, recently was overhauled to support a more low-key, lucrative and sustainable business: Renting hundreds of thousands of infected Internet of Things (IoT) devices to proxy services that help cybercriminals anonymize their traffic. Experts says a glut of proxies from Aisuru and other sources is fueling large-scale data harvesting efforts tied to various artificial intelligence (AI) projects, helping content scrapers evade detection by routing their traffic through residential connections that appear to be regular Internet users.
