Remove obfuscated RCE payload from jest.config.js and restore .gitignore - #7
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Remove obfuscated RCE payload from jest.config.js and restore .gitignore#7kevpay wants to merge 1 commit into
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jest.config.js carried an obfuscated JavaScript payload appended after the legitimate
config, hidden behind a long run of spaces on the closing line so it sits
off-screen in an editor. Restored to its pre-tampering content.
What the payload does:
- Resolves its C2 endpoint from the Ethereum blockchain (EtherHiding), reading
the host from recent transactions of a hardcoded attacker-controlled address
via public RPC endpoints and a Blockscout txlist API.
- Fetches a second stage over HTTP(S) and runs it two ways: eval() in-process,
and a detached spawn(node, ['-e', ...]) with stdio 'ignore' and windowsHide,
unref'd so it outlives the parent.
jest.config.js executes_on_every_jest_invocation, so this ran on developer
machines and in CI.
.gitignore was rewritten by the same commit: line endings converted, the .env
entry deleted, and a config.bat entry added. Removing .env from .gitignore
stages local secrets to become committable. Restored to its pre-tampering
revision.
The payload first arrived in 19cba20_("don't_display_address_twice",_2025-11-14);_2e7b59d_removed_it_on_2026-05-27_and_6aef8c5_reintroduced_it_the_same_day.
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Summary
jest.config.jscarried an obfuscated JavaScript payload appended after the legitimate config, hidden behind a long run of spaces on the closing line so it sits off-screen in an editor..gitignorewas rewritten by the same activity to delete the.enventry and addconfig.bat.What the payload does
txlistAPI.eval()in-process, and a detachedspawn(node, ['-e', ...])withstdio: 'ignore'andwindowsHide,unref()'d so it outlives the parent.jest.config.jsexecutes on everyjestinvocation, so anynpm testwould run it.Provenance — a same-day reinfection
The payload arrived in
19cba20("don't display address twice", 2025-11-14). On 2026-05-27,2e7b59d("remove polin rider") successfully removed it — the file drops to a clean 614 bytes. Later the same day,6aef8c5("Update .gitignore") put a newer, blockchain-C2 variant back, taking the file to 30,567 bytes.A clean removal followed by reinfection hours later, from the same author, points at the committing machine rather than CI. File-level cleanup will not hold until that is dealt with.
Scope note
This PR cleans the current tip only; the payload remains reachable in history. Ten other org repositories carry the same campaign, and any credentials reachable from an affected machine or CI run should be treated as compromised.
Generated by Claude Code