registry / Credential exfiltration / @servicetitan/anvil2-ext-atlas
@servicetitan/anvil2-ext-atlas
This report shows the evidence for @servicetitan/anvil2-ext-atlas@4.0.5. 7 of 8 known versions are blocked or flagged. The newest version, 4.1.0, is allowed. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe UI distribution appears benign, but its install hook deliberately bootstraps and executes an unrelated obfuscated credential-capable payload. This is concrete malicious behavior, not a package-aligned build step.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review
Trigger
npm installation
Impact
Credential theft and arbitrary code execution in the installer environment.
Mechanism
preinstall bootstrap executes obfuscated credential-harvesting payload
Attack narrative
Installing the package invokes setup.mjs. It uses Bun if present or downloads and executes a Bun binary from GitHub, passing the bundled obfuscated math_init.js. That payload includes handlers for GitHub/npm/AWS/Vault credentials, child-process use, and eval of received code, creating an unconsented install-time credential-exfiltration and remote-code-execution chain.
AI rationale
The UI distribution appears benign, but its install hook deliberately bootstraps and executes an unrelated obfuscated credential-capable payload. This is concrete malicious behavior, not a package-aligned build step.
Evidence
package.jsonsetup.mjsmath_init.jsdist/index.js
Network endpoints1
github.com/oven-sh/bun/releases/download/bun-v1.3.13/
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json runs `node setup.mjs` during preinstall.
- setup.mjs downloads and executes Bun solely to run math_init.js.
- math_init.js is a 711KB heavily obfuscated executable payload.
- math_init.js contains GitHub, npm, AWS, and Vault credential-handling code.
- math_init.js evaluates received code and invokes child_process.
Evidence against
- dist/index.js is a conventional React UI-component entrypoint.
- The only clear setup URL is Bun's GitHub release host.
Behavioral surface
ChildProcessEnvironmentVarsEvalFilesystemNetworkShell
HighEntropyStringsMinifiedUrlStrings
Source & flagged code
3 flagged · loading sourcepackage.jsonView file
•scripts.preinstall = node setup.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkgmath_init.jsView file
1// @bun @bun-cjs
L2: var MmgoCP,etDiOOB,JqTtnbZ,bc3Kak,ZQmUTyQ,TTUgga,MDX6yrw,h8wMJNB,CabwE2L,x5ErqV;function WV8StW(MmgoCP,etDiOOB,JqTtnbZ){for(JqTtnbZ=0x0;JqTtnbZ<etDiOOB;JqTtnbZ++)MmgoCP.push(MmgoCP...
Low
Eval
Package source references a known benign dynamic code generation pattern.
math_init.jsView on unpkg · L1setup.mjsView file
•matchType = normalized_sha256
matchedPackage = @hubsync/web-sdk-react@6.3.26
matchedPath = setup.mjs
matchedIdentity = npm:QGh1YnN5bmMvd2ViLXNkay1yZWFjdA:6.3.26
similarity = 1.000
summary = normalized source hash matched finalized malicious source
Findings
2 High3 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEvalmath_init.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to @servicetitan/anvil2-ext-atlas@4.0.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing @servicetitan/anvil2-ext-atlas@4.0.5. 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: .
Source advisory published: .
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