LWA-2026-6276 MAL-2026-6731 ↗ confirmed malware

ue-jenkins-buildkite@99999.0.0

Malicious code in ue-jenkins-buildkite (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1082 · System Information DiscoveryT1552.001 · Credentials In FilesT1071.001 · Web ProtocolsT1041 · Exfiltration Over C2 Channel

Analysis

On preinstall, this package executes a script that collects the installer's hostname, username, working directory, platform, architecture, Node.js version, npm agent, and CI environment indicators (HORDE_AGENT, GITHUB_ACTIONS, JENKINS_URL, TEAMCITY_VERSION). It then filters environment variables matching AWS_, GITHUB_, GH_, NPM_, EPIC_, UE_, HORDE_, P4, CI, BUILD, TOKEN, KEY, or SECRET (up to 30 values) and POSTs the full data bundle as JSON to hxxp://109[.]123[.]247[.]172/npm/ue_jenkins_buildkite. Additionally, it performs a DNS lookup to a hostname-username digest at the domain .ue_jenkins_buildkite.npm[.]epic-dc[.]oast[.]fun (an interact.sh-style callback service). The package exports an empty module and has no legitimate functionality.

analyzed by
Leitwacht
first seen
Jul 2, 2026, 09:06 PM
analyzed
Jul 2, 2026, 09:08 PM

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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.