Net Crawler

Net Crawler is an intranet worm capable of extracting credentials using credential dumpers and spreading to systems on a network over SMB by brute forcing accounts with recovered passwords and using PsExec to execute a copy of Net Crawler. [1]

ID: S0056
Associated Software: NetC
Type: MALWARE
Platforms: Windows
Version: 1.1
Created: 31 May 2017
Last Modified: 30 March 2020

Techniques Used

Domain ID Name Use
Enterprise T1110 .002 Brute Force: Password Cracking

Net Crawler uses a list of known credentials gathered through credential dumping to guess passwords to accounts as it spreads throughout a network.[1]

Enterprise T1003 .001 OS Credential Dumping: LSASS Memory

Net Crawler uses credential dumpers such as Mimikatz and Windows Credential Editor to extract cached credentials from Windows systems.[1]

Enterprise T1021 .002 Remote Services: SMB/Windows Admin Shares

Net Crawler uses Windows admin shares to establish authenticated sessions to remote systems over SMB as part of lateral movement.[1]

Enterprise T1569 .002 System Services: Service Execution

Net Crawler uses PsExec to perform remote service manipulation to execute a copy of itself as part of lateral movement.[1]

Groups That Use This Software

ID Name References
G0003 Cleaver

[1]

References