{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/products/sui-execution-cut/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":["sui-execution-cut"],"_cs_severities":["critical"],"_cs_tags":["supply-chain","malware","rust"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eOn April 20, 2026, a malicious crate named \u003ccode\u003esui-execution-cut\u003c/code\u003e was published to crates.io. This crate included a build script that, when executed, attempted to exfiltrate data from the machine on which the crate was being built. The crate had no dependencies and only one version was ever published. The malicious package was quickly removed from crates.io after discovery. While the crate was available for a short period, there is no evidence of actual usage, however, supply chain compromises can have a wide impact if successful, and even this low-usage crate warrants monitoring.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eA developer adds the malicious \u003ccode\u003esui-execution-cut\u003c/code\u003e crate as a dependency to their Rust project.\u003c/li\u003e\n\u003cli\u003eDuring the build process, the \u003ccode\u003ecargo\u003c/code\u003e build system executes the build script embedded within the \u003ccode\u003esui-execution-cut\u003c/code\u003e crate.\u003c/li\u003e\n\u003cli\u003eThe build script executes a series of commands designed to gather sensitive information from the build environment.\u003c/li\u003e\n\u003cli\u003eThe script establishes an outbound network connection to a remote server controlled by the attacker.\u003c/li\u003e\n\u003cli\u003eThe gathered data is transmitted to the attacker\u0026rsquo;s server via HTTP POST or a similar method.\u003c/li\u003e\n\u003cli\u003eThe attacker receives the exfiltrated data, which could include environment variables, file contents, or other sensitive information.\u003c/li\u003e\n\u003cli\u003eThe attacker analyzes the stolen data for valuable secrets, credentials, or intellectual property.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe \u003ccode\u003esui-execution-cut\u003c/code\u003e crate, if used, could have compromised developer machines by exfiltrating sensitive data during the build process. Although the crate was quickly removed and showed no signs of usage, a successful attack of this nature could lead to the exposure of secrets, credentials, and intellectual property. The lack of usage limits the impact, but the nature of supply chain attacks makes even low-usage crates a potential risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor for unexpected network connections originating from build processes, especially connections to unknown or suspicious domains. Use the \u0026ldquo;Detect Suspicious Outbound Connections from Build Processes\u0026rdquo; Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement strict dependency review processes to identify and prevent the introduction of malicious packages into your software supply chain.\u003c/li\u003e\n\u003cli\u003eContinuously monitor crates.io and other package repositories for reports of malicious packages and promptly remove them from your dependencies if identified.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-04T21:42:55Z","date_published":"2026-05-04T21:42:55Z","id":"/briefs/2026-05-sui-execution-cut-exfiltration/","summary":"The `sui-execution-cut` crate on crates.io contained a build script designed to exfiltrate data from the build machine during the build process.","title":"Malicious sui-execution-cut Crate Exfiltrates Build Machine Data","url":"https://feed.craftedsignal.io/briefs/2026-05-sui-execution-cut-exfiltration/"}],"language":"en","title":"CraftedSignal Threat Feed — Sui-Execution-Cut","version":"https://jsonfeed.org/version/1.1"}