@or-sdk/event-manager@1.1.7
Malicious code in @or-sdk/event-manager (npm)
T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1195.002 · Compromise Software Supply ChainT1027 · Obfuscated Files or Information
Analysis
The package's preinstall hook (setup.mjs) downloads the Bun runtime from the official oven-sh/bun GitHub release and uses it to execute a bundled 727KB obfuscated script (math_init.js) at install time. The script is obfuscated with a large encoded string array and a custom decoder, so its behaviour is hidden. The package also depends on @or-sdk/base, a known-malicious dependency, and its runtime code is a thin wrapper that imports from it. Installing this package executes the obfuscated payload on every install.
- analyzed by
- Leitwacht
- first seen
- Aug 4, 2026, 11:56 AM
- analyzed
- Aug 4, 2026, 05:47 PM
- weekly installs
- 1,168
Related advisories
- @or-sdk/base@0.44.6
- @or-sdk/sdk-api@0.29.4
- @or-sdk/providers@0.3.8
- @or-sdk/contacts@4.7.7
- @or-sdk/agents@4.21.5
- @or-sdk/druid@1.4.9
- @or-sdk/data-hub-svc@2.3.7
- @or-sdk/key-value-storage@0.28.8
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.