The Iru Blog

Rustbot, the macOS malware used in the latest Rust Supply Chain Attack

Inside the screensharingd Bugs: How macOS Screen Sharing Went from Root File Access to Pre-Auth Compromise

How a single PostScript file leaks your Mac's memory

When I started my InfoSec journey, most of the offensive classes I took focused on memory corruption exploits. I learned a lot about buffer overflows, DEP and ASLR bypasses, and even got into kernel exploitation. However, since my job at that time was mostly hunting for bad guys in an insane amount of logs and telemetry data, I never really had the time to apply this knowledge.

Iru Quarterly Threat Report: August 2026

EDR threat detections and responses Iru EDR is built to detect threats before they go mainstream. By combining behavioral detections with insights from our own malware research, we're able to protect customers from exploitation even before public disclosures or patches become available.

Feature engineering for a macOS malware classifier, and why the Mac makes it harder than Windows

The threat landscape for macOS malware is expanding, while the number of specialists dedicated to defending against it has not kept pace. Unlike Windows, where machine learning (ML) models are supported by extensive documentation and standardized datasets, the macOS environment presents a significant knowledge gap. At Iru, we captured SSTAR Agent, a crypto drainer targeting web3 technology developers via a fake interview lure, which we documented in an earlier post using an ML triage we built.

Inside SStar Agent, a cross-platform RAT with an unfinished macOS toolkit

NVD's shift to risk-based prioritization: how Iru Vulnerability Management stays ahead of the limitations

NIST formally transitioned the National Vulnerability Database to a risk-based enrichment model in April 2026, meaning only CVEs that meet specific criteria, like those in CISA's KEV catalog or affecting federal software, will be prioritized for enrichment. Everything else gets deferred. This leaves a significant gap for security teams that depend on NVD data for vulnerability management. Iru VM was built to operate independently of NVD's limitations, drawing from multiple sources and providing its own human-in-the-loop enrichment. To date, Iru's Security Research team has enriched close to 2,000 CVEs and corrected around 170 inaccurate NVD records, with 66% of all vulnerability detections across customer endpoints driven by Iru-enriched data. The CVE program has long been a vital part of vulnerability intelligence and protecting critical infrastructure. For the past couple of decades, the National Vulnerability Database (NVD), run by NIST, has served as a foundational reference for vulnerability intelligence, providing severity scores, product metadata, and structured enrichment that security teams and tooling depend on every day.

Iru Quarterly Threat Report: May 2026

Welcome 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.

MiniRAT: A Go-based macOS RAT delivered via malicious npm package

MiniRAT is a Go-based macOS RAT dropped onto developer machines via a malicious npm package. It evades VMs, persists via a LaunchAgent disguised as an Apple component, and beacons over HTTPS using an AES-encrypted C2 config. Operators can run shell commands, exfiltrate files, and stage secondary payloads. A newly analyzed Go-based macOS remote access trojan (RAT), internally named Minirat, has surfaced in the wild using anti-VM checks, LaunchAgent persistence, and AES-encrypted command and control (C2) configuration to maintain stealthy, long-term access on victim endpoints. According to SafeDep, the initial infection vector was a malicious npm package (velora-dex-sdk) that dropped the Go-based macOS RAT onto developer endpoints.

Atomic Stealer (AMOS) Returns: ClickFix, Trojanized Crypto Apps, and a New macOS Persistence Mechanism

Atomic Stealer, commonly tracked as AMOS, has earned its place as one of the most persistent threats the macOS threat landscape. Powered by a relentless development cycle and diverse distribution networks, it shows no signs of slowing down. Researchers have extensively documented its signature tactics: "ClickFix" browser social engineering prompts, trojanized application installers, and, most recently, the "malext" variants spread through malvertising campaigns.

macOS Malware Analysis: Music Plugin DMG Loader

On February 4, 2026, security researchers discovered a mass-distributed loader disguised as predominantly cracked music plugin DMGs used to deliver multiple multistage macOS malware, such as Odyssey and MacSyncStealer, in addition to a Mach-O binary containing another loader to an additional payload.

The Security Implications of OpenClaw and Autonomous AI Agents

In recent months, a new class of AI tools has gained momentum, blurring the line between traditional assistants and fully autonomous automation platforms. OpenClaw, previously known as Clawdbot and Moltbot, is designed to execute tasks for users with little ongoing human involvement, including file management, workflow automation, and direct shell command execution. Its rapid viral growth and strong community adoption, with almost 200,000 GitHub stars, have brought attention to a new category of AI tools that operate with deeper system access than most conversational AI platforms.

The hidden risks of the Homebrew Cellar in Vulnerability Management

In the modern macOS ecosystem, Homebrew is a staple: the engine under the hood in software engineers' day to day development, and a productivity enhancer for macOS power users. However, its convenience and ubiquity may introduce a significant blind spot for security teams if they lack visibility into the "Cellar" - the specific location where Homebrew stores its binaries, known as formulae. Its hidden dependencies, lingering outdated binaries, and relaxed permissions can create serious security gaps. When a workstation may be the gateway to cloud and production systems, those gaps matter.

The Dangers of Cracking Tools

This blog article highlights one particular risk that arises from using various tools to crack software: introducing vulnerabilities to their environment. This article provides a general overview, examines past cases, and dives into an actual local privilege escalation vulnerability we uncovered in a macOS software cracker.