{"id":"MAL-2026-6748","summary":"Malicious code in haproxy-config-client (PyPI)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (f3231df36fad882782125a817ad5881080ef595dc1941b5d77aac3c19e7b2bab)\nDuring installation the obfuscated code downloads a malicious executable from a remote location. Code is designed to survive different blocks: first, there is an attempt to download the executable from one of five Cloudflare Workers. If it's not successful, the code falls back to download using DNS: first, it gets a TXT record from c.lin.dl.wel1[.]ru. This record returns a number, which is then used to iterate over domains in the form \u003c0...n\u003e.lin.dl.wel1[.]r and reconstruct the encoded executable from their TXT records. The executable is finally saved under a partially random name, executed, and removed after execution. The Linux executable contacts a few domains, but there is no more detailed information about its behavior available.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-06-haproxy-config-client\n\n\nReasons (based on the campaign):\n\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n\n - Downloads and executes a remote executable.\n\n\n - obfuscation\n\n\n - dependency-confusion\n\n\n - other\n\n\n - malware\n\n\n - covering-tracks\n\n\n - targetted-attack\n","modified":"2026-07-04T00:00:56.150164562Z","published":"2026-07-03T22:43:15Z","database_specific":{"malicious-packages-origins":[{"id":"pypi/2026-06-haproxy-config-client/haproxy-config-client","sha256":"f3231df36fad882782125a817ad5881080ef595dc1941b5d77aac3c19e7b2bab","modified_time":"2026-07-03T22:43:15.278764Z","source":"kam193","versions":["8.5.3"],"import_time":"2026-07-03T23:26:20.882507498Z"},{"id":"pypi/2026-07-haproxy-config-client/haproxy-config-client","modified_time":"2026-07-03T22:43:15.278764Z","sha256":"f9e96a88174798db94c5c03e458edc05136cbf37abc255590d34c09dcd534688","source":"kam193","versions":["8.5.3"],"import_time":"2026-07-03T23:51:45.546961499Z"}],"iocs":{"urls":["https://package-proxy.cf5oobworker.workers.dev/pkg/package","https://package-proxy.cf8oobworker.workers.dev/pkg/package","https://package-proxy.cf12oobworker.workers.dev/pkg/package","https://package-proxy.cf17-ddb.workers.dev/pkg/package","https://package-proxy.cf25-6eb.workers.dev/pkg/package"],"domains":["package-proxy.cf5oobworker.workers.dev","package-proxy.cf8oobworker.workers.dev","package-proxy.cf12oobworker.workers.dev","package-proxy.cf17-ddb.workers.dev","package-proxy.cf25-6eb.workers.dev","c.lin.dl.wel1.ru"]}},"references":[{"type":"EVIDENCE","url":"https://www.virustotal.com/gui/file/d47a2d1b96df84b10263a99866b865421b334448432d1b447b82c76253bcbe86/detection"},{"type":"WEB","url":"https://bad-packages.kam193.eu/pypi/package/haproxy-config-client"}],"affected":[{"package":{"name":"haproxy-config-client","ecosystem":"PyPI","purl":"pkg:pypi/haproxy-config-client"},"versions":["8.5.3"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/haproxy-config-client/MAL-2026-6748.json"}}],"schema_version":"1.7.5","credits":[{"name":"Kamil Mańkowski (kam193)","contact":["https://github.com/kam193","https://bad-packages.kam193.eu/"],"type":"REPORTER"}]}