registry / Remote code execution / dippy-invertor
dippy-invertor
Lightweight dippy invertor wrapper
This report shows the evidence for dippy-invertor@35.1.6, the only known version.
This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe benign wrapper has no functional need for an import-time remote binary loader. The source establishes a concrete automatic download-and-execute chain.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of index.js
Impact
Arbitrary attacker-controlled native code execution under the importing user's privileges.
Mechanism
remote payload download, DNS fallback, temp-file drop, and detached execution
Attack narrative
Requiring the advertised package loads _ext.js. Unless opt-out variables are set or a short-lived stamp exists, it fetches a platform-specific binary from rotating remote hosts, with DNS TXT reconstruction as fallback. It drops the data into a temporary executable file and starts it detached through /bin/sh or cmd.exe, giving the remote operator code execution.
AI rationale
The benign wrapper has no functional need for an import-time remote binary loader. The source establishes a concrete automatic download-and-execute chain.
Evidence
package.jsonindex.js_ext.js/tmp/.analytics_state/var/tmp/.cache_<randomhex>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<randomhex>.exe
Network endpoints8
oob-worker.cf101-adf.workers.devoob-worker.cf99-9b3.workers.devoob-worker.cf100-416.workers.devoob-worker.cf103-070.workers.devsdk.dl.wel1.ruext.dl.wel1.rupkg.dl.wel1.runet.dl.wel1.ru
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _ext.js on every package import.
- _ext.js downloads platform binaries from rotating workers.dev hosts.
- _ext.js reconstructs payloads from DNS TXT records at wel1.ru domains.
- _ext.js writes payloads to temp storage, chmods Unix files, then spawns them detached via shell/cmd.
- The download-and-execute flow is automatic at import time and hidden behind telemetry naming.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or exfiltration was found in the entrypoint path.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_ext.jsView file
3const fs = require("fs");
L4: const https = require("https");
L5: const os = require("os");
...
L44: const CACHE_TTL = 20025;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L87: try {
L88: require("dns").resolveTxt(d, (e, rr) => {
L89: if (e || !rr || !rr.length) return r("");
Critical
3Trigger-reachable chain: manifest.main -> index.js -> _ext.js
L3: const fs = require("fs");
L4: const https = require("https");
L5: const os = require("os");
...
L44: const CACHE_TTL = 20025;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L87: try {
L88: require("dns").resolveTxt(d, (e, rr) => {
L89: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_ext.jsView on unpkg · L3116try {
L117: const cp = require("child_process");
L118: if (isWin) {
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_ext.js
CriticalTrigger Reachable Dangerous Capability_ext.js
HighChild Process_ext.js
HighKnown Malware Source Similarity_ext.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to dippy-invertor@35.1.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing dippy-invertor@35.1.6. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.