{"answers":{"affected":"1 open source package ship an affected version, including ezfnfix.","exploited":"There is no known exploitation of MAL-2026-13344 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-13344 is a malicious package in ezfnfix, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13344 is a malicious package: ezfnfix (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-13344/ (Markdown: https://insights.sbomify.com/MAL-2026-13344/index.md)","id":"MAL-2026-13344","markdown":"https://insights.sbomify.com/MAL-2026-13344/index.md","name":"MAL-2026-13344","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On Windows, `npm install ezfnfix` automatically executes a bundled Windows PE binary via a postinstall hook. package.json declares `scripts.postinstall = \"node postinstall.js\"`, and postinstall.js enumerates bin/*.exe and runs the first entry with execFileSync. The shipped bin/ezfn.exe is a ~114 KB VB.NET executable whose metadata contains identifiers consistent with a remote-access trojan and infostealer: Telegram bot exfiltration primitives (SendBot, ChatID), socket C2 (ClientSocket, ConnectServer, ActivatePong), a spreading routine (Spread), AV/Defender-exclusion logic (Exclusion), webcam access (avicap32.dll), WMI-based host enumeration (ManagementObjectSearcher, get_UserName, get_MachineName, get_OSFullName, get_TotalPhysicalMemory), registry persistence handles (RegistryKey, CurrentUser), symmetric cryptography primitives, and WebClient/DownloadString network fetch. The binary ships with no source, no build step, no hash or signature verification, and no purpose consistent with the package name. Installing on Windows results in immediate execution of the RAT against the installer's host, exfiltrating identity and system information via Telegram/socket channels and providing persistent remote access.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in ezfnfix (npm)","id":"MAL-2026-13344","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"ezfnfix","purl":"pkg:npm/ezfnfix","source":"MAL-2026-13344"}],"products":null,"published":"2026-08-05","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-13344/"}