Intel471’s new report reveals macOS is more and more focused by menace actors, who develop particular malware for the working system or use cross-platform languages to realize their objectives on macOS computer systems.
Extra macOS vulnerabilities are additionally being exploited within the wild. Malware and exploits is perhaps used for each cybercrime and cyberespionage.
Extra malware than ever on macOS
Between January 2023 and July 2024, the researchers noticed greater than 40 menace actors concentrating on macOS techniques with totally different malware varieties, the most well-liked being infostealers and trojans.
Infostealers
Info stealer malwares — aka infostealers — are more and more developed and deployed on all working techniques, and macOS is not any exception.
In accordance to cloud safety firm Uptycs, incidents involving infostealers doubled within the first quarter of 2023 in comparison with the identical interval in 2022. Cybersecurity firm Group-IB additionally experiences a fivefold rise in underground gross sales associated to macOS infostealers.
Such software program is utilized by cybercriminals to steal log-in credentials, session cookies enabling authentication with out credentials, and extra information equivalent to bank card data or cryptocurrency wallets. The software program can be extensively utilized by preliminary entry brokers, who acquire legitimate credentials, most frequently from firms slightly than people, and promote them to different cybercriminals.
Atomic Stealer — additionally known as Atomic macOS Stealer or AMOS — is likely one of the hottest macOS infostealers since 2023. It’s designed to steal credentials and cryptocurrency pockets information from macOS units and browsers.
But a number of cybercriminals function or promote different infostealers concentrating on macOS. A menace actor nicknamed codehex marketed for a macOS infostealer dubbed ShadowVault, able to stealing information from varied Chrome-based browsers, information saved on compromised computer systems, and information from cryptocurrency wallets.
The malware operators might additionally signal it with an Apple developer signature, making its detection tougher for safety software program. The malware was bought at a month-to-month value of $500 beneath a Malware-as-a-Service (MaaS) enterprise mannequin.
One other costlier infostealer, Quark Lab, with capabilities to steal keychain passwords from techniques in addition to cryptocurrency wallets and in style browser data, was bought for $3,000 per 30 days.
Trojans
Distant entry trojans are one other in style class of malware more and more deployed on macOS.
RustDoor, a macOS malware developed in RUST and probably tied to a ransomware menace actor, offers a number of functionalities to its controller:
- Executes distant instructions.
- Manipulates information on compromised techniques.
- Provides extra payloads.
- Collects system data.
This makes it a singular software for each cyberespionage and cybercrime menace actors. Rust programming language has turn into extra in style amongst malware builders, as it’s a cross-platform language that permits a developer to simply port code into any working system.
Ransomware
As written by Intel471, “the appearance of macOS ransomware raises concerns since it demonstrates threat actors seeking new avenues to compromise Apple users.”
In April 2023, safety researchers found a brand new encryptor for the notorious LockBit ransomware, which focused macOS units, together with newer macOS techniques operating on Apple Silicon.
In late 2023 got here one other less-advanced ransomware, dubbed Turtle, and developed as soon as once more in a cross-platform programming language, Golang, aka Go. The malware was solely signed advert hoc and never notarized, making it detectable by Gatekeeper, as defined by skilled safety researcher Patrick Wardle.
Vulnerabilities exploited
The variety of macOS vulnerabilities exploited in 2023 elevated by greater than 30%, in accordance to patch administration software program firm Action1.
Moreover, Intel471 discovered 69 vulnerabilities that impacted a number of variations of macOS from March 2020 to July 2024, with greater than 10 vulnerabilities ranked at a high-risk degree. A few of these vulnerabilities have been exploited by cyberespionage menace actors.
CVE-2023-41993, an unspecified vulnerability concentrating on a number of variations of macOS, was exploited to put in Cytrox’s Predator adware that was bought to a number of state-sponsored organizations worldwide.
Menace actors additionally exploited CVE-2023-41064, a buffer-overflow vulnerability. The cyberespionage menace actor bought its adware to state-sponsored organizations.
A cybercriminal nicknamed oDmC3oJrrSuZLhp supplied to promote an exploit on an underground discussion board for $2.7 million for the CVE-2022-32893 vulnerability, which permits an attacker to execute arbitrary code on focused techniques.
State-sponsored menace actors
Whereas totally different adware suppliers have bought their companies to state-sponsored menace actors, a few of these menace actors do develop malware and instruments geared toward macOS.
North Korean menace actor BlueNoroff, for instance, has developed a malicious loader referred to as RustBucket, developed for macOS and geared toward concentrating on monetary establishments whose actions are associated to cryptocurrencies.
The group additionally targets people holding cryptocurrency belongings, with the final word aim of stealing all of the crypto cash from focused wallets.
Russian menace actors APT28, a part of the Russian Principal Directorate of the Basic Workers of the Armed Forces, and APT29, a part of Russia’s International Intelligence Service, have additionally used macOS malware.
The XAgent modular backdoor utilized by APT28 has been round for a few years and included a macOS model, permitting it to steal information from compromised macOS techniques, together with iOS backups containing messages, contacts, voicemail, name histories, notes, and calendars. APT29 used the no-longer-supported Empire cross-platform distant administration and post-exploitation framework, enabling concentrating on of macOS.
Vietnam-based menace actor APT32 additionally deployed a macOS backdoor used for concentrating on totally different organizations.
The right way to guard in opposition to this menace
macOS techniques should all the time be updated and patched to keep away from being compromised by frequent vulnerabilities.
Safety software program must be deployed on the techniques to detect malware and suspicious actions. E-mail safety options must also be used since a variety of the preliminary compromise is unfold through phishing emails.
Lastly, all staff should be skilled to detect potential social engineering methods utilized in emails or immediate messaging instruments.
Disclosure: I work for Development Micro, however the views expressed on this article are mine.
