LWA-2026-11601 confirmed malware
@atfm/utils@99.99.99
Malicious code in @atfm/utils (npm)
T1059.007 · JavaScriptT1082 · System Information DiscoveryT1071.001 · Web ProtocolsT1041 · Exfiltration Over C2 Channel
Analysis
The package is a tiny stub (no functional code) whose preinstall and install hooks both run on installation: they collect the installer's username, hostname, current working directory, and package name, base64-encode them, and transmit them to the remote host callback[.]m0chan[.]co[.]uk via an HTTP GET to hxxps://<package-name>.callback[.]m0chan[.]co[.]uk/<encoded-data>, and additionally leak the data through a DNS query (nslookup) to the same domain. This exfiltrates host metadata to an external callback server on every install.
- analyzed by
- Leitwacht
- first seen
- Aug 24, 2026, 03:15 PM
- analyzed
- Aug 24, 2026, 03:16 PM
Related advisories
- @atfm/typeface@99.99.99
- @atfm/atfm-material-ui@99.99.99
- @elc-online/up-analytics@99.99.99
- auth-otp@1.0.5
- remove-bg-serverless-azure@1.0.1
- openai-pr-reviewer@1.0.0
- hydration-ui-dim@1.0.0
- hydration-dim-ui@1.0.0
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.