registry / Credential exfiltration / @servicetitan/anvil2
@servicetitan/anvil2
This report shows the evidence for @servicetitan/anvil2@3.9.2. 7 of 29 known versions are blocked or flagged. The newest version, 3.17.0, is allowed. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is unconsented preinstall execution of an obfuscated payload that collects and transmits GitHub credentials. The Bun download is a staging mechanism, not a package-aligned UI-library action.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source
Trigger
npm install, via the preinstall lifecycle hook
Impact
The installer environment's GitHub credentials may be stolen.
Mechanism
staged Bun payload execution and GitHub-token exfiltration
Attack narrative
On npm installation, package.json invokes setup.mjs. That script obtains Bun if absent and executes the obfuscated math_init.js payload. The payload contains token-source handling for ghtoken, ghs_old, and ghs_jwt and uses obfuscated fetch upload routines, constituting credential exfiltration.
AI rationale
This is unconsented preinstall execution of an obfuscated payload that collects and transmits GitHub credentials. The Bun download is a staging mechanism, not a package-aligned UI-library action.
Evidence
package.jsonsetup.mjsmath_init.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` as preinstall.
- setup.mjs downloads Bun from GitHub and executes math_init.js during installation.
- math_init.js is a 728KB obfuscated executable payload.
- math_init.js enumerates `ghtoken`, `ghs_old`, and `ghs_jwt` credential sources.
- The payload sends collected data through obfuscated fetch-based upload logic.
Evidence against
- Published exports otherwise describe a React UI component library.
Behavioral surface
ChildProcessEnvironmentVarsEvalFilesystemNetworkShell
HighEntropyStringsMinifiedUrlStrings
NoLicense
Source & flagged code
4 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
3 High3 Medium6 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
HighPrevious Version Dangerous Deltasetup.mjs
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEvalmath_init.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @servicetitan/anvil2@3.9.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing @servicetitan/anvil2@3.9.2. 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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