Found a backdoor on my NixOS laptop disguised as a "Nix-update" service?
Comments on “Found a backdoor on my NixOS laptop disguised as a "Nix-update" service?”
3 judges. Scored by all three judges. Only the day’s top stories get the claim check. How far stories are checked
A NixOS user reports finding a 12 MB Go binary and systemd user units in their home directory, which reverse-engineering suggests is a customized ligolo-ng build with obfuscation and a C2 domain, installed silently on October 22. ClamAV did not flag it.
Why it ranked
No. 48 of 137 with a score of 0.64. The panel rated it highest on new information (0.83) and reader interest (0.83), lowest on audience breadth (0.53). The judges disagreed most on substantiated (spread 0.47), so the story is marked contested. Placed No. 48, No. 39 by score alone: the twelfth Security story of the day (−0.080). The placement terms move stories; they are not part of the score.
- AI judgeJudge 2claude-haiku-5-5
- A user's forum report of a suspected user-level backdoor on a Nix system, with a detailed timeline and strace evidence but no confirmed root cause; security-relevant and practically useful, with unverified claims.
- AI judgeJudge 3gpt-5.6-luna
- A detailed firsthand report of a likely Linux/Nix user-level backdoor, with reverse-engineering, persistence, C2, execution evidence, and incident-response implications; attribution remains uncertain and some conclusions are speculative.
Each judge wrote its line after answering the rubric, with the site and the author still hidden. Every answer behind this is in the table under Score.
Score
0.64total under rubric v2.3Contestedjudges differ by 0.47 on substantiated
- Significance0.56
- Reader interest0.83
- Audience breadth0.53
- Practical relevance0.73
- Substantiated0.61
- Technical depth0.76
- New information0.83
- Counts against: Promotional0.06
- Counts against: Overclaim0.38
Each judge’s answer per question (0–1), their mean and spread, and what the question adds to the score (weight × mean).
| Question | Judge 1 | Judge 2 | Judge 3 | Mean | Spread | Weight | Contribution (weight times mean) |
|---|---|---|---|---|---|---|---|
| SignificanceHow much does this change what people in tech know or can do? | 0.53 | 0.45 | 0.70 | 0.56 | 0.25 | +0.24 | +0.134 |
| Reader interestWould a well-informed senior engineer or tech founder want to read this today, and likely pass it on? | 0.75 | 0.80 | 0.93 | 0.83 | 0.18 | +0.26 | +0.215 |
| Audience breadthHow many people who build technology does it concern? | 0.63 | 0.40 | 0.55 | 0.53 | 0.23 | +0.13 | +0.068 |
| Practical relevanceHow useful is it to someone who builds software or tech products? | 0.76 | 0.65 | 0.80 | 0.73 | 0.15 | +0.22 | +0.162 |
| SubstantiatedHow well is it backed? Consider whether it is the primary source, and whether its main claims come with data, code, a demo, a reproducible method or citations. | 0.82 | 0.35 | 0.65 | 0.61 | 0.47 , above the contested threshold | +0.05 | +0.030 |
| Technical depthHow technically substantive is it? | 0.96 | 0.60 | 0.72 | 0.76 | 0.36 | +0.05 | +0.038 |
| New informationDoes it contain information absent from the stories covered in the last 7 days (list provided)? | 0.82 | 0.80 | 0.88 | 0.83 | 0.08 | +0.05 | +0.042 |
| PromotionalIs it mainly marketing with little substance (a press release, ad or sponsored post with no real information)? A launch post that carries real news is not promotional. | 0.05 | 0.05 | 0.08 | 0.06 | 0.03 | −0.19 | −0.011 |
| OverclaimDo the headline or conclusions claim more than the body supports? | 0.44 | 0.35 | 0.35 | 0.38 | 0.09 | −0.11 | −0.042 |
| Sum of contributions | +0.636 | ||||||
| Claim-check penalty | 0.000 | ||||||
| Total, as published | 0.636 | ||||||
Spread is the highest minus the lowest judge answer. marks a spread above 0.40: the judges disagree, and the story is marked contested.
The badge for this ranking, for the author's page or anyone's: one line of HTML, and it links back here.
<a href="https://rubric.hrih.si/editions/2026-11-04/48/"><img src="https://rubric.hrih.si/badge/2026-11-04/48.svg" alt="Ranked #48 on Rubric, 4 Nov 2026" width="238" height="28"></a>Also covered by
No other coverage was clustered with this story.
Elsewhere
Elsewhere: HN 3 pts, not on front page
Recorded for context only, checked 4 Nov 2026, 05:47 UTC. It played no part in the ranking.