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Count Dooku

Supply-chain campaign that re-published legitimate VS Code extensions to Open VSX with a malicious JavaScript IIFE appended after the source-map comment — placed outside the source map so casual review and diff tools miss it. The injected payload beacons to a hard-coded C2. Tracked by opensourcemalware.com.

Extensions
45
Stores
OpenVSX
Updated
2026-07-12
Disclosed
2026-07-11

Member extensions

45 extensions
Campaign member extensions and their current risk
ExtensionStoreReported versionsCurrent risk
pptx-previewcorotata.pptx-previewOpenVSX1.0.1Unscored
sql-server-profiler-toolepolicardo.sql-server-profiler-toolOpenVSX0.5.1Unscored
vscode-fabricfabric.vscode-fabricOpenVSX0.39.1865HIGH
hostinger-connectorhostinger-official.hostinger-connectorOpenVSX1.2.365HIGH
web-viewerhss.web-viewerOpenVSX0.0.265HIGH
node-runnerhuanent.node-runnerOpenVSX1.0.265HIGH
claude-commitjuajnnlb.claude-commitOpenVSX1.0.465HIGH
claude-commitjuanlb.claude-commitOpenVSX1.0.165HIGH
plan-umljustuskarlsson.plan-umlOpenVSX0.0.865HIGH
protobufkangping.protobufOpenVSX1.1.665HIGH
vscode-openrouter-extensionkhaled.vscode-openrouter-extensionOpenVSX0.5.065HIGH
yaml-with-scriptmatthiesen-technology.yaml-with-scriptOpenVSX1.1.365HIGH
Lispmattn.LispOpenVSX0.1.1265HIGH
streamlit-previewmjethwa-streamlit.streamlit-previewOpenVSX3.3.465HIGH
csv-to-tablephplasma.csv-to-tableOpenVSX1.4.165HIGH
vscode-playwright-test-runnersakamoto66.vscode-playwright-test-runnerOpenVSX1.4.1Unscored
json-serversarthikbhat.json-serverOpenVSX0.0.465HIGH
md-editorseepine.md-editorOpenVSX0.1.165HIGH
bazel-vscodesfdc-eng.bazel-vscodeOpenVSX0.26.10602182165HIGH
office-editorshubhamprajapati1202.office-editorOpenVSX1.0.165HIGH
Browse 5 indicators
TypeValue & evidence
urlhttps://beststats.world/pingC2 beacon endpoint reached by the appended payload
domainbeststats.worldCount Dooku C2 domain
ext_idopenvsx-namespace:a373083284542Attacker Open VSX publisher namespace (multi-extension)
ext_idopenvsx-namespace:henry-davis-5045Attacker Open VSX publisher namespace
ext_idopenvsx-namespace:dwells3532Attacker Open VSX publisher namespace

Research & sources

Read the investigation →