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Yesterday — 19 September 2024Main stream

Massive China-state IoT botnet went undetected for four years—until now

✇Ars Technica
By: Dan Goodin
18 September 2024 at 21:58
Massive China-state IoT botnet went undetected for four years—until now

Enlarge (credit: Getty Images)

The FBI has dismantled a massive network of compromised devices that Chinese state-sponsored hackers have used for four years to mount attacks on government agencies, telecoms, defense contractors, and other targets in the US and Taiwan.

The botnet was made up primarily of small office and home office routers, surveillance cameras, network-attached storage, and other Internet-connected devices located all over the world. Over the past four years, US officials said, 260,000 such devices have cycled through the sophisticated network, which is organized in three tiers that allow the botnet to operate with efficiency and precision. At its peak in June 2023, Raptor Train, as the botnet is named, consisted of more than 60,000 commandeered devices, according to researchers from Black Lotus Labs, making it the largest China state botnet discovered to date.

Burning down the house

Raptor Train is the second China state-operated botnet US authorities have taken down this year. In January, law enforcement officials covertly issued commands to disinfect Internet of Things devices that hackers backed by the Chinese government had taken over without the device owners’ knowledge. The Chinese hackers, part of a group tracked as Volt Typhoon, used the botnet for more than a year as a platform to deliver exploits that burrowed deep into the networks of targets of interest. Because the attacks appear to originate from IP addresses with good reputations, they are subjected to less scrutiny from network security defenses, making the bots an ideal delivery proxy. Russia-state hackers have also been caught assembling large IoT botnets for the same purposes.

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Before yesterdayMain stream

Secure Boot-neutering PKfail debacle is more prevalent than anyone knew

✇Ars Technica
By: Dan Goodin
17 September 2024 at 00:13
Secure Boot-neutering PKfail debacle is more prevalent than anyone knew

Enlarge (credit: Getty Images)

A supply chain failure that compromises Secure Boot protections on computing devices from across the device-making industry extends to a much larger number of models than previously known, including those used in ATMs, point-of-sale terminals, and voting machines.

The debacle was the result of non-production test platform keys used in hundreds of device models for more than a decade. These cryptographic keys form the root-of-trust anchor between the hardware device and the firmware that runs on it. The test production keys—stamped with phrases such as “DO NOT TRUST” in the certificates—were never intended to be used in production systems. A who's-who list of device makers—including Acer, Dell, Gigabyte, Intel, Supermicro, Aopen, Foremelife, Fujitsu, HP, and Lenovo—used them anyway.

Medical devices, gaming consoles, ATMs, POS terminals

Platform keys provide the root-of-trust anchor in the form of a cryptographic key embedded into the system firmware. They establish the trust between the platform hardware and the firmware that runs on it. This, in turn, provides the foundation for Secure Boot, an industry standard for cryptographically enforcing security in the pre-boot environment of a device. Built into the UEFI (Unified Extensible Firmware Interface), Secure Boot uses public-key cryptography to block the loading of any code that isn’t signed with a pre-approved digital signature.

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1.3 million Android-based TV boxes backdoored; researchers still don’t know how

✇Ars Technica
By: Dan Goodin
13 September 2024 at 22:20
1.3 million Android-based TV boxes backdoored; researchers still don’t know how

Enlarge (credit: Getty Images)

Researchers still don’t know the cause of a recently discovered malware infection affecting almost 1.3 million streaming devices running an open source version of Android in almost 200 countries.

Security firm Doctor Web reported Thursday that malware named Android.Vo1d has backdoored the Android-based boxes by putting malicious components in their system storage area, where they can be updated with additional malware at any time by command-and-control servers. Google representatives said the infected devices are running operating systems based on the Android Open Source Project, a version overseen by Google but distinct from Android TV, a proprietary version restricted to licensed device makers.

Dozens of variants

Although Doctor Web has a thorough understanding of Vo1d and the exceptional reach it has achieved, company researchers say they have yet to determine the attack vector that has led to the infections.

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As quantum computing threats loom, Microsoft updates its core crypto library

✇Ars Technica
By: Dan Goodin
12 September 2024 at 02:20
As quantum computing threats loom, Microsoft updates its core crypto library

Enlarge (credit: Getty Images)

Microsoft has updated a key cryptographic library with two new encryption algorithms designed to withstand attacks from quantum computers.

The updates were made last week to SymCrypt, a core cryptographic code library for handing cryptographic functions in Windows and Linux. The library, started in 2006, provides operations and algorithms developers can use to safely implement secure encryption, decryption, signing, verification, hashing, and key exchange in the apps they create. The library supports federal certification requirements for cryptographic modules used in some governmental environments.

Massive overhaul underway

Despite the name, SymCrypt supports both symmetric and asymmetric algorithms. It’s the main cryptographic library Microsoft uses in products and services including Azure, Microsoft 365, all supported versions of Windows, Azure Stack HCI, and Azure Linux. The library provides cryptographic security used in email security, cloud storage, web browsing, remote access, and device management. Microsoft documented the update in a post on Monday.

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Rogue WHOIS server gives researcher superpowers no one should ever have

✇Ars Technica
By: Dan Goodin
11 September 2024 at 12:00
Rogue WHOIS server gives researcher superpowers no one should ever have

Enlarge (credit: Aurich Lawson | Getty Images)

It’s not every day that a security researcher acquires the ability to generate counterfeit HTTPS certificates, track email activity, and the position to execute code of his choice on thousands of servers—all in a single blow that cost only $20 and a few minutes to land. But that’s exactly what happened recently to Benjamin Harris.

Harris, the CEO and founder of security firm watchTowr, did all of this by registering the domain dotmobiregistry.net. The domain was once the official home of the authoritative WHOIS server for .mobi, a top-level domain used to indicate that a website is optimized for mobile devices. At some point—it’s not clear precisely when—this WHOIS server, which acts as the official directory for every domain ending in .mobi, was relocated, from whois.dotmobiregistry.net to whois.nic.mobi. While retreating to his Las Vegas hotel room during last month’s Black Hat security conference in Las Vegas, Harris noticed that the previous dotmobiregistry.net owners had allowed the domain to expire. He then scooped it up and set up his own .mobi WHOIS server there.

Misplaced trust

To Harris’s surprise, his server received queries from slightly more than 76,000 unique IP addresses within a few hours of setting it up. Over five days, it received roughly 2.5 million queries from about 135,000 unique systems. The entities behind the systems querying his deprecated domain included a who’s who of Internet heavyweights comprising domain registrars, providers of online security tools, governments from the US and around the world, universities, and certificate authorities, the entities that issue browser-trusted TLS certificates that make HTTPS work.

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Found: 280 Android apps that use OCR to steal cryptocurrency credentials

✇Ars Technica
By: Dan Goodin
6 September 2024 at 22:23
Found: 280 Android apps that use OCR to steal cryptocurrency credentials

Enlarge (credit: Getty Images)

Researchers have discovered more than 280 malicious apps for Android that use optical character recognition to steal cryptocurrency wallet credentials from infected devices.

The apps masquerade as official ones from banks, government services, TV streaming services, and utilities. In fact, they scour infected phones for text messages, contacts, and all stored images and surreptitiously send them to remote servers controlled by the app developers. The apps are available from malicious sites and are distributed in phishing messages sent to targets. There’s no indication that any of the apps were available through Google Play.

A high level of sophistication

The most notable thing about the newly discovered malware campaign is that the threat actors behind it are employing optical character recognition software in an attempt to extract cryptocurrency wallet credentials that are shown in images stored on infected devices. Many wallets allow users to protect their wallets with a series of random words. The mnemonic credentials are easier for most people to remember than the jumble of characters that appear in the private key. Words are also easier for humans to recognize in images.

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