hacker-news · Crawled Aug 7, 2026
Nearly 800 Malicious npm Packages Deliver Cross-Platform RAT and Infostealer
12 IoCs 1 Malware
Read original article ↗
AI Summary
A large-scale npm supply chain campaign has distributed nearly 800 malicious packages designed to deliver a cross-platform RAT and infostealer. The packages bypass typical lifecycle hook detection by instructing developers to load them via require(), triggering a downloader named WEL1DROPPER that fetches payloads from Cloudflare Workers or fallback domains using DNS TXT record exfiltration. The payloads target Windows, Mac, and Linux systems, establishing persistence, evading detection, and deploying secondary malware such as Sliver C2. The campaign, tracked as Flooding Dropper, may target Russian financial institutions and appears to evolve from the earlier Moika campaign.
AI-extracted · verify before operational use
Extracted Entities 1 found
Indicators of Compromise 12 extracted
| Type | Value | Detail |
|---|---|---|
| Domain | oob-worker[.]cf103-070[.]workers[.]dev | Details → |
| Domain | oob-worker[.]cf102-baf[.]workers[.]dev | Details → |
| Domain | oob-worker[.]cf99-9b3[.]workers[.]dev | Details → |
| Domain | wel1[.]ru | Details → |
| Domain | sdk[.]dl[.]wel1[.]ru | Details → |
| Domain | ext[.]dl[.]wel1[.]ru | Details → |
| Domain | pkg[.]dl[.]wel1[.]ru | Details → |
| Domain | net[.]dl[.]wel1[.]ru | Details → |
| Filename | lib/telemetry.js | Details → |
| Filename | /pkg/update_win.exe | Details → |
| Filename | /pkg/beacon_mac.bin | Details → |
| GitHub Repo | oob-worker.cf99-9b3.workers.dev | Details → |
MITRE ATT&CK TTPs 40 techniques
T1003.001 LSASS Memory · Credential Access T1014 Rootkit · Defense Evasion T1016 System Network Configuration Discovery · Discovery T1021.001 Remote Desktop Protocol · Lateral Movement T1027 Obfuscated Files or Information · Defense Evasion T1053.005 Scheduled Task · Execution T1055 Process Injection · Defense Evasion T1055.001 Dynamic-link Library Injection · Defense Evasion T1056.003 Web Portal Capture · Collection T1059.001 PowerShell · Execution T1059.003 Windows Command Shell · Execution T1070.004 File Deletion · Defense Evasion T1071 Application Layer Protocol · Command And Control T1071.001 Web Protocols · Command And Control T1071.004 DNS · Command And Control T1074.001 Local Data Staging · Collection T1078 Valid Accounts · Defense Evasion T1080 Taint Shared Content · Lateral Movement T1082 System Information Discovery · Discovery T1087.002 Domain Account · Discovery T1090 Proxy · Command And Control T1090.004 Domain Fronting · Command And Control T1095 Non-Application Layer Protocol · Command And Control T1098.004 SSH Authorized Keys · Persistence T1105 Ingress Tool Transfer · Command And Control T1112 Modify Registry · Defense Evasion T1113 Screen Capture · Collection T1133 External Remote Services · Persistence T1140 Deobfuscate/Decode Files or Information · Defense Evasion T1195.001 Compromise Software Dependencies and Development Tools · Initial Access T1204.002 Malicious File · Execution T1210 Exploitation of Remote Services · Lateral Movement T1485 Data Destruction · Impact T1496 Resource Hijacking · Impact T1547.001 Registry Run Keys / Startup Folder · Persistence T1555 Credentials from Password Stores · Credential Access T1557.001 LLMNR/NBT-NS Poisoning and SMB Relay · Credential Access T1558 Steal or Forge Kerberos Tickets · Credential Access T1566 Phishing · Initial Access T1647 Plist File Modification · Defense Evasion