registry / Malware / @sigmashake/ssg

@sigmashake/ssg

AI Agent Governance CLI — evaluate tool calls against rules, block dangerous operations, and surface blocked commands

This report shows the evidence for @sigmashake/ssg@1.1.8. 2 of 4 known versions are blocked or flagged. See all versions.

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The automatic install hook deletes external user binaries and performs persistent machine tracking with remote transmission. This is concrete destructive behavior and data exfiltration unrelated to safely installing the package.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

Installing the package globally through npm.

Impact

Removes other installed binaries, exposes a stable device identifier to a remote service, and writes a tracking token under the user's home directory.

Mechanism

Postinstall deletion, device fingerprinting, remote registration, and canary persistence.

Attack narrative

During a global npm installation, postinstall invokes cleanup-globals.cjs. The script removes named executables in user-controlled global locations when they do not resolve inside this package. It then derives a stable fingerprint from machine identifiers and local host data, posts it to api.sigmashake.com, and stores a returned canary token in ~/.sigmashake/.canary. These actions occur automatically rather than through an explicit user command.

AI rationale

Evidence

package.jsonbin/cleanup-globals.cjs~/.local/bin/ssg~/.local/bin/libssg_eval.so~/.bun/bin/ssg~/.sigmashake/.canary/etc/machine-idHKLM\SOFTWARE\Microsoft\Cryptography

Network endpoints1

api.sigmashake.com

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

The package runs cleanup-globals.cjs automatically in postinstall.
On global installation, the hook deletes several user-level ssg binaries outside its own installation.
The hook hashes a stable machine fingerprint including the machine ID, hostname, and home directory.
The hook sends that fingerprint to api.sigmashake.com and persists a server-issued canary token.

Evidence against

The destructive and tracking code is gated to installations detected as global.
No runtime dependency on another release of this package is declared.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkWebSocket

Supply chain

HighEntropyStringsMinifiedUrlStrings

Manifest

NoLicense

scanned 3 file(s), 1.63 MB of source, external domains: 127.0.0.1, 169.254.169.254, accounts.sigmashake.com, api.example.com, billing.sigmashake.com, bun.sh, docs.sigmashake.com, github.com, hub.sigmashake.com, react.dev, sigmashake.com, ssg.invalid, vcs.sigmashake.com, www.w3.org

Source & flagged code

6 flagged

package.jsonView file

Lines 5-45json

5 "license": "SEE LICENSE IN LICENSE",

6 "type": "module",

7 "bin": {

8 "ssg": "bin/ssg.cjs"

9 },

10 "files": [

11 "bin/",

12 "public/",

13 "LICENSE",

14 "README.md",

15 "sbom.cdx.json"

16 ],

17 "optionalDependencies": {

18 "@sigmashake/ssg-linux-x64": "1.1.8",

19 "@sigmashake/ssg-linux-arm64": "1.1.8",

20 "@sigmashake/ssg-darwin-arm64": "1.1.8",

21 "@sigmashake/ssg-darwin-x64": "1.1.8",

22 "@sigmashake/ssg-win32-x64": "1.1.8"

23 },

24 "scripts": {

25 "postinstall": "node ./bin/cleanup-globals.cjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L25

26 "gen:api-deprecation": "bun run tools/gen-api-deprecation-catalog.ts",

27 "gen:starter-presets": "bun run tools/gen-starter-presets.ts",

28 "gen:opencode-plugin": "bun run tools/gen-opencode-plugin.ts",

29 "dev": "bun run scripts/dev.ts",

30 "dev:server-only": "SSQA_ATTACH=${SSQA_ATTACH:-1} bun --watch src/serve-dev.ts",

31 "dev:debug": "bun --inspect src/serve-dev.ts",

32 "dev:debug-daemon": "bun --inspect src/cli.ts daemon",

33 "build": "bun run build:client && bun build --compile src/cli.ts --outfile ssg",

34 "build:linux": "bun build --compile --target=bun-linux-x64 src/cli.ts --outfile dist/ssg-linux-x64 && bun run scripts/stage-public-to-dist.ts",

35 "build:macos-arm64": "bun build --compile --target=bun-darwin-arm64 src/cli.ts --outfile dist/ssg-darwin-arm64 && bun run scripts/stage-public-to-dist.ts",

36 "build:macos-x64": "bun build --compile --target=bun-darwin-x64 src/cli.ts --outfile dist/ssg-darwin-x64 && bun run scripts/stage-public-to-dist.ts",

37 "build:macos-universal": "bun run build:macos-arm64 && bun run build:macos-x64 && lipo -create dist/ssg-darwin-arm64 dist/ssg-darwin-x64 -output dist/ssg-darwin-universal && file dist/ssg-darwin-universal",

38 "build:windows": "bun build --compile --target=bun-windows-x64 src/cli.ts --outfile dist/ssg-win32-x64.exe && bun run scripts/stage-public-to-dist.ts",

39 "build:windows-hookw": "bun build --compile --windows-hide-console --target=bun-windows-x64 src/cli.ts --outfile dist/ssg-hookw-win32-x64.exe && bun run scripts/patch-pe-subsystem.ts dist/ssg-hookw-win32-x64.exe && bun run scripts/assert-windowshide-effective.ts && bun run scripts/stage-public-to-dist.ts",

40 "build:linux-arm64": "bun build --compile --target=bun-linux-arm64 src/cli.ts --outfile dist/ssg-linux-arm64 && bun run scripts/stage-public-to-dist.ts",

41 "build:all": "bun run build:linux && bun run build:linux-arm64 && bun run build:macos-arm64 && bun run build:macos-x64 && bun run build:windows && bun run build:windows-hookw",

42 "build:protected:all": "bash ../sigmashake-dist/scripts/build-protected.sh",

43 "pub:platforms": "bash ../sigmashake-dist/scripts/publish-platforms.sh",

44 "prepublishOnly": "bash ../sigmashake-dist/scripts/prepublish-guard.sh",

45 "build:client": "tsc --noEmit -p tsconfig.client.json && vite build",

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

package.jsonView on unpkg

bin/cleanup-globals.cjsView file

Lines 1-25javascript

1#!/usr/bin/env node

2// bin/cleanup-globals.cjs — Cleans up conflicting global ssg installations

3// Also registers a per-install canary for distribution tracking.

4// This runs on `postinstall` to ensure npm takes precedence

6const fs = require("node:fs");

7const path

bin/ssg.cjsView file

Lines 1-26javascript

1#!/usr/bin/env node

2// bin/ssg.cjs — launcher for @sigmashake/ssg

3// Resolves the native binary from the platform-specific optional dependency,

4// falls back to a local dist/ build (dev environment), then to Bun + source.

5"use strict";

7const { execFileSync, spawnSync } = require("node:child_process");

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./bin/cleanup-globals.cjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

package.jsonView on unpkg

bin/cleanup-globals.cjsView file

•matchType = normalized_sha256 matchedPackage = @sigmashake/ssg@1.1.5 matchedPath = bin/cleanup-globals.cjs matchedIdentity = npm:QHNpZ21hc2hha2Uvc3Nn:1.1.5 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

Findings

5 High4 Medium6 Low

HighInstall Time Lifecycle Scriptspackage.json

HighSandbox Evasion Gated Capabilitybin/ssg.cjs

HighSemantic Analysis Limitedpackage.json

HighKnown Malware Source Similaritybin/ssg.cjs

HighKnown Malware Source Similaritybin/cleanup-globals.cjs

MediumDynamic Requirebin/cleanup-globals.cjs

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

LowNo License

Affected versions and remediation

This report applies to @sigmashake/ssg@1.1.8.

The versions list below shows the verdict for each recorded version.

Avoid installing @sigmashake/ssg@1.1.8. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-15 05:19:16.581Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

4 known versions

1.1.8latestshownMaliciousMalwareBlockPublishedSep 5, 2026, 3:45 PM 1.1.5MaliciousData ExfiltrationBlockPublishedAug 22, 2026, 3:08 AM 1.0.9Suspicious—WarnPublishedJul 16, 2026, 11:32 AM 1.0.8Suspicious—WarnPublishedJul 4, 2026, 6:37 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other malware packages

Behavioral surface

Source & flagged code

Related packages

Other malware packages