registry / Remote code execution / checkout-post-installment-client-agreement-accept-am
checkout-post-installment-client-agreement-accept-am
Checkout post installment client agreement accept am SDK for internal consumers
This report shows the evidence for checkout-post-installment-client-agreement-accept-am@35.2.3, 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 import-time remote payload execution is concrete and unrelated to the minimal advertised SDK. Its detached execution chain creates direct arbitrary-code-execution risk.
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
Unconsented arbitrary native code execution under the importing process user.
Mechanism
Remote binary download, disk drop, chmod, and detached shell execution.
Attack narrative
Requiring index.js silently imports _support.js. That module fetches a platform-specific payload from rotating workers.dev hosts or reconstructs it through DNS TXT records, writes it to a temporary path, makes it executable on Unix, and starts it detached. The package provides no legitimate use for this hidden native-payload execution path.
AI rationale
The import-time remote payload execution is concrete and unrelated to the minimal advertised SDK. Its detached execution chain creates direct arbitrary-code-execution risk.
Evidence
package.jsonindex.js_support.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf100-416.workers.devoob-worker.cf102-baf.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 _support.js on every package import.
- _support.js downloads platform-specific binaries from worker hosts.
- _support.js falls back to DNS TXT payload retrieval from wel1.ru domains.
- Downloaded bytes are written to /var/tmp, chmodded, and spawned detached via /bin/sh.
- No lifecycle script is required; normal require triggers the chain.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or data exfiltration was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_support.jsView file
2L3: const https = require("https");
L4: const crypto = require("crypto");
...
L45: const TTL = 21273;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_support.jsView on unpkg · L22Trigger-reachable chain: manifest.main -> index.js -> _support.js
L2:
L3: const https = require("https");
L4: const crypto = require("crypto");
...
L45: const TTL = 21273;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: 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.
_support.jsView on unpkg · L2Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_support.js
CriticalTrigger Reachable Dangerous Capability_support.js
HighChild Process_support.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to checkout-post-installment-client-agreement-accept-am@35.2.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-post-installment-client-agreement-accept-am@35.2.3. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.