LWA-2026-6039 MAL-2026-6577 ↗ confirmed malware

int_sezzle_sfra@25.2.1

Malicious code in int_sezzle_sfra (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1082 · System Information DiscoveryT1041 · Exfiltration Over C2 ChannelT1071.001 · Web Protocols

Analysis

Package int_sezzle_sfra is a combosquat on Sezzle (a real fintech company). Its preinstall script (node index.js) automatically collects detailed system information — hostname, platform, architecture, home directory, username, uid, gid, shell, OS type/release, total/free memory, CPU count — and runs the `whoami` and `id` shell commands. All this data is POSTed as JSON to the attacker-controlled OAST callback URL hxxps://1mopc72u2pqhsphbd3rmzirm9df43wrl[.]oastify[.]com/detox56. The package has no legitimate purpose, no repository, and is a system recon and data exfiltration payload.

analyzed by
Leitwacht
first seen
Jun 27, 2026, 11:22 AM
analyzed
Jun 27, 2026, 09:20 PM

Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.