registry / Install hook abuse / claude-multiacc
claude-multiacc
Unified Claude Code and OpenAI Codex subscription pooling with quota-aware selection.
This report shows the evidence for claude-multiacc@2.0.32. 20 of 61 known versions are blocked or flagged. The newest version, 2.0.61, is allowed. See all versions.
AI Security Review
scanned 1mo ago · by lpm-firewall-aiThis is an unconsented postinstall mutation of a broad AI-agent control surface: it shadows Claude and Codex commands, persists scheduled jobs, and self-updates. The global-install guard does not remove the automatic lifecycle behavior or its control over later command execution.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review
Trigger
Running npm install -g claude-multiacc or a scheduled cron or launchd job afterward.
Impact
Subsequent claude and codex commands can be intercepted and run through package-controlled account and credential logic; future releases are installed automatically.
Mechanism
Postinstall PATH shadowing, command shims, persistence, and automatic self-update.
Attack narrative
On global installation, npm automatically invokes install.sh. That installer places the package bin directory ahead of normal command paths, can create system-wide claude and codex symlinks, and installs recurring jobs. The shims intercept the original AI command names. A daily scheduled task checks npm and installs claude-multiacc@latest, re-triggering postinstall and preserving the control chain without a new explicit setup command.
AI rationale
This is an unconsented postinstall mutation of a broad AI-agent control surface: it shadows Claude and Codex commands, persists scheduled jobs, and self-updates. The global-install guard does not remove the automatic lifecycle behavior or its control over later command execution.
Evidence
package.jsonscripts/postinstall.mjsinstall.shlib/install_actions.shbin/codexbin/codex-accounts$HOME/.zshenv$HOME/.zprofile$HOME/.zshrc$HOME/.bashrc/etc/profile.d/claude-multiacc.sh/usr/local/bin/claude/usr/local/bin/codex$HOME/Library/LaunchAgents/com.claude-multiacc.*.plistcrontab
Decision evidence
public snapshotAI called this Malicious at 98.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package runs a postinstall hook that automatically starts its installer during global npm installation.
- The installer rewrites shell startup files so its bin directory precedes the existing PATH.
- It replaces the commands named claude and codex with package shims, including system-wide symlinks when run as root.
- It creates recurring launchd or cron jobs, including a daily job that installs the latest package release.
- The Codex shim intercepts normal codex invocations and executes the real binary only after applying its account-pool behavior.
Evidence against
- The postinstall hook skips local installs, CI, Windows, and an explicit opt-out environment setting.
- No hard-coded third-party exfiltration endpoint was found in the inspected installation path.
Behavioral surface
ChildProcessEnvironmentVarsFilesystemShell
HighEntropyStrings
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/postinstall.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.mjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkginstall.shView file
•path = install.sh
kind = build_helper
sizeBytes = 10485
magicHex = [redacted]
Medium
tests/test_selector.py
Findings
5 High4 Medium3 Low
HighInstall Time Lifecycle Scriptspackage.json
HighPayload In Excluded Dirtests/test_selector.py
HighSemantic Analysis Limitedbin/claude-accounts
HighKnown Malware Source Similaritybin/codex
HighKnown Malware Source Fingerprint Signaturebin/cli.mjs
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumEnvironment Vars
MediumShips Build Helperinstall.sh
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to claude-multiacc@2.0.32.
The versions list below shows the verdict for each recorded version.
- Avoid installing claude-multiacc@2.0.32. 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: .
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