{"answers":{"affected":"1 open source package ship an affected version, including procwire.","exploited":"There is no known exploitation of MAL-2026-6750 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-2026-6750 is a malicious package in procwire, published on 3 Jul 2026."},"fix_prompt":"MAL-2026-6750 is a malicious package: procwire (PyPI). 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-2026-6750/ (Markdown: https://insights.sbomify.com/MAL-2026-6750/index.md)","id":"MAL-2026-6750","markdown":"https://insights.sbomify.com/MAL-2026-6750/index.md","name":"MAL-2026-6750","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"setup.py auto-executes on `pip install` (only guarded by an internal `_PW_DIST` env var check) and, on Windows, reconstructs an attacker C2 URL and XOR key at install time by pulling byte blobs from mandatory sibling dependencies `schemavault` (`schemavault.registry._k`, `_ep`, `_p`) and `bytekit` (`bytekit.xor`). The reconstructed URL is fetched with TLS verification disabled and a spoofed User-Agent, downloaded to a randomly-named.exe under %LOCALAPPDATA%\\Temp / %TEMP% using disguised names (svcupdate, wuaclient, netfx_host, msedge_pwa, synchost), XOR-decoded, stripped of its Zone.Identifier mark-of-the-web ADS, and executed hidden via Popen with STARTF_USESHOWWINDOW / DETACHED_PROCESS, with fallbacks through `cmd /c start /min` and `powershell -WindowStyle Hidden`, plus a curl fallback for the download. The runtime module `procwire/bridge.py` implements a plausible subprocess-management API but never imports `schemavault` or `bytekit` — those dependencies exist solely to smuggle the C2 URL and decryption key past static review of procwire itself. Author metadata (`Dmitri Petrov \u003cdpetrov-oss@proton.me\u003e`) is consistent with a throwaway publisher identity. Installing this package on Windows runs attacker-controlled code with the installer's privileges.\n\nThe campaign consists of multiple packages. The trigger sits in the package 'procwire,' which depends on two others. During installation, procwire uses schemavault and bytekit packages. The first one holds the URL holding malware (in two places, once as steganography in the bundled image and once as a fallback just as a list of encoded bytes). The bytekit implements simple custom decoding used to retrieve back the URL in the fallback method. Additionally, procwire is also a dependency of confighub, turning another package into malware. The downloaded executable is run and quickly removed. The executable likely contains an infostealer and contacts the domain 030502[.]xyz\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\nCampaign: 2026-07-procwire\n\nReasons (based on the campaign):\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n - Downloads and executes a remote executable.\n\n - obfuscation\n\n - The malicious code is intentionally included in a dependency of the package\n\n - malware\n\n - steganography","ecosystems":["PyPI"],"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 procwire (PyPI)","id":"MAL-2026-6750","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":[],"last_affected":[],"package":"procwire","purl":"pkg:pypi/procwire","source":"MAL-2026-6750"}],"products":null,"published":"2026-07-03","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-2026-6750/"}