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Four months after a mysterious group was outed for a digital espionage operation that used novel techniques to target Mac users, its macOS malware samples continued to go undetected by most antivirus providers, a security researcher reported on Thursday. Ars Technica reports: Windshift is what researchers refer to as an APT -- short for "advanced persistent threat" -- that surveils individuals in the Middle East. The group operated in the shadows for two years until August, when Taha Karim, a researcher at security firm DarkMatter, profiled it at the Hack in the Box conference in Singapore. Slides, a brief description, and a report from Forbes are here, here and here, respectively.

On Thursday, Mac security expert Patrick Wardle published an analysis of Meeting_Agenda.zip, a file Karim had said installed the rare Mac malware. To Wardle's surprise, results from VirusTotal at the time showed that only two antivirus providers -- Kaspersky and ZoneAlarm -- detected the file as malicious. Wardle then used a feature that searched VirusTotal for related malicious files and found four more. Three of them weren't detected by any AV providers, while one was detected by only two providers. The reason the findings were so surprising is that Apple had already revoked the cryptographic certificate the developers used to digitally sign their malware. That meant Apple knew of the malware. In fairness, the control servers the malware contacts are no longer available on the Internet. That means any infected computers aren't in danger of being surveilled. Also in fairness, the number of detections has slowly risen in the day since Wardle published his analysis.

An anonymous reader shares a report: When a group of security researchers reported a popular but allegedly dangerous Mac App Store utility to Apple, noting that it secretly sends "highly sensitive user information" to an "unscrupulous" developer, Apple's response for a full month was surprising: "crickets." But after a cluster of bad press today, Apple finally pulled Yongming Zhang's app Adware Doctor: Anti Malware &Ad from the store.

Three researchers, including former NSA staffer Patrick Wardle, Thomas Reed of Malwarebytes, and "privacy fighter" @privacyis1st, said in a blog post today that they reported Adware Doctor last month for sending a user's Safari, Chrome, Firefox, and App Store browsing histories alongside lists of the Mac's apps and running processes to a server in China. Despite receiving confirmation that Apple received the report, the $5 app remained in the App Store -- where it was ranked the number one paid app across all Mac utilities.

Security researcher Patrick Wardle helped Apple fix a bug that would crash apps displaying the word "Taiwan" or the Taiwanese flag emoji. Some iPhones could be remotely crashed by something as simple as receiving a text message with the Taiwanese flag. Apple confirmed the fix in a security update Monday. Wired reports: "Basically Apple added some code to iOS with the goal that phones in China wouldn't display a Taiwanese flag," Wardle says, "and there was a bug in that code." Since at least early 2017, iOS has included that Chinese censorship function: Switch your iPhone's location setting to China, and the Taiwanese flag emoji essentially disappears from your phone, evaporating from its library of emojis and appearing as a "missing" emoji in any text that appears on the screen. That code likely represents a favor from Apple to the Chinese government, which for the last 70 years has maintained that Taiwan is a part of China and has no legitimate independent government.

But Wardle found that in some edge cases, a bug in the Taiwan-censorship code meant that instead of treating the Taiwan emoji as missing from the phone's library, it instead considered it an invalid input. That caused phones to crash altogether, resulting in what hackers call a "denial of service" attack that would let anyone crash a vulnerable device on command. Wardle's still not sure how many devices are affected, or what caused that bug to be triggered only in some iOS devices and not others, but he believes it has something to do with the phone's location and language settings. Wardle has more details of the bug on his blog.

An anonymous reader quotes a report from Motherboard: What's that song? On your cellphone, the popular app Shazam is able to answer that question by listening for just a few seconds, as if it were magic. On Apple's computers, Shazam never turns the microphone off, even if you tell it to. When a user of Shazam's Mac app turns the app "OFF," the app actually keeps the microphone on in the background. For the security researcher who discovered that the mic is always on, it's a bug that users should know about. For Shazam, it's just a feature that makes the app work better. Patrick Wardle, a former NSA hacker who now develops free Mac security tools, discovered this issue thanks to his latest software OverSight, which is designed to alert users when apps use their webcam and microphone. After he released OverSight, Wardle received an email from a user who noticed that the security app alerted him that Shazam was still listening even after he had switched the toggle to "off." Curious about this discovery, and worried his own software might be issuing a false alarm, Wardle reverse engineered the Shazam app to figure out what was happening. After a few hours analyzing the code, Wardle found out that, in fact, Shazam never stops listening, as he explained in a blog post published on Monday. James Pearson, VP of global communications for Shazam, said in a statement to Motherboard: "There is no privacy issue since the audio is not processed unless the user actively turns the app 'ON.' If the mic wasn't left on, it would take the app longer to both initialize the mic and then start buffering audio, and this is more likely to result in a poor user experience where users 'miss out' on a song they were trying to identify."