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3 min readSmall and midsize businesses (SMBs) are under siege. Attackers know these organizations often run lean IT teams with limited budgets, making them prime “path of least resistance” targets.
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5 min readIn September 2025, Iru's security researchers identified multiple spoofed Homebrew installer sites designed to mimic the official brew.sh page. These replicas injected malicious payloads under the guise of a standard install. In this post, we examine the tactics, infrastructure, and impact of the campaign.
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5 min readHow data processing delays, inaccuracies, and systemic challenges in the National Vulnerability Database are impacting security teams and what you can do about it.
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15 min readThis article summarizes work we performed in 2024, which we shared in our “Finding Vulnerabilities in Apple Packages at Scale” talk at MacDevOpsYVR and SecurityFest conferences earlier this year. You can watch the full presentation below:
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6 min readOn August 13 2025, Iru's security researchers discovered a potentially interesting Rust-compiled file on VirusTotal. Our investigation resulted in the analysis of 6 related Mach-O files. With this initial blog post, we're focusing on the first file of this analysis, the dropper. The dropper file is designed to quietly download and run another malicious file, stay on the system by setting up persistence, and avoid being detected by commonly used macOS security tools. We have included the hashes of the relevant Mach-O files currently on VirusTotal in the IOC section below in an effort to shed light on these samples quickly while we continue our analysis of the loader samples. At the time of writing, the specific Mach-O we cover below has zero detections on VirusTotal and most of the loader Mach-O files are also undetected.
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3 min readWelcome to the Iru Threat Intelligence Report, our quarterly summary of emerging threats in the macOS ecosystem and how Iru is responding in real time. In each edition, we break down key threat discoveries and the protections we’ve deployed to keep customer devices secure.
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14 min readOn May 15, 2025, the security research team MalwareHunterTeam (@malwrhunterteam) identified a suspicious file named libsystd.dylib with low detection—only 2 at the time of posting— which appeared to be an infostealer.
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4 min readWelcome to the Iru Threat Intelligence Report, our quarterly summary of emerging threats in the macOS ecosystem and how Iru is responding in real time. In each edition, we break down key threat discoveries and the protections we’ve deployed to keep customer devices secure.
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10 min readIru security researchers have been hard at work hunting for vulnerabilities in macOS, reporting them to Apple before malicious actors can exploit them. This proactive approach is a cornerstone of our product strategy, benefiting not just our customers but the entire Apple ecosystem.
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28 min readOn March 13, 2025, our team found a suspicious mach-O file on Virustotal named wsus. After our initial analysis of this file and the package which installed it, we discovered over 20 related binaries used to capture data from macOS systems and applications, including WeChat, QQ, web browsers, email, etc. This multi-binary suite indicates a deep understanding of macOS and their target applications. The software’s targeted applications and other observed network connections strongly indicate both a Chinese origin and target user base.
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4 min readWeb browsers are the gateway to the internet, a ubiquitous fixture of every enterprise device—making them a critical point of exposure. When managing your fleet you may ask: Are we aware of the vulnerabilities affecting our users’ browsers? While vulnerability databases are a great place to start, the widespread use of common codebases makes it harder to trace and recognize vulnerabilities that affect multiple products.
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10 min readOver the past two parts of this series, we’ve explored vulnerabilities in macOS’s diskarbitrationd daemon. In part 1, we explored how an attacker could use it to escape the sandbox or escalate privileges. In part 2, we explored how a directory traversal attack could be used to bypass Transparency, Consent, and Control (TCC) protections. Each of these vulnerabilities highlighted the risks posed by weaknesses in macOS’s system daemons and how attackers could chain them together for even more impact.
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16 min readOver the last few months, several Swift applications have been attributed to the North Korea Contagious Interview effort. These applications are presented to victims as part of a fake job interview process. SentinelOne recently published a blog post on “Flexible Ferret” and other related applications including two named ChromeUpdate (which was originally covered by dmpdump in their blog post) and CameraAccess. Moonlock Lab also recently covered the ChromeUpdate and CameraAccess applications in a blog post, which provided an overview of what they do.
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9 min readInfostealers targeting macOS are evolving rapidly, making continuous monitoring essential, which our team is always on the lookout for. Many infostealers share similar behaviors aimed at exfiltrating data from compromised systems. In fact, these similarities can make it difficult to distinguish between different infostealers without a deep understanding of what to look for.
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28 min readUnlike traditional viruses or ransomware, stealers are designed with a singular purpose: to quietly infiltrate systems and exfiltrate sensitive data—often without the victim even realizing it. These malicious programs are highly focused on gathering personal information, usually to be sold or used for further criminal activity.
Iru's bi-weekly collection of articles, videos, and research to keep IT & Security teams ahead of the curve.
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