shuck.sh

What It Is

Shuck.sh is a free service for analyzing password hashes and authentication challenges. Its core purpose is to quickly “shuck” NetNTLMv1 challenges (with or without ESS/SSP), PPTP VPN challenges, and WPA-Enterprise MSCHAPv2 challenges during security assessments. It relies on Have I Been Pwned’s leaked NT-hash database and uses optimized search to identify possible NT hashes, rather than performing brute-force attacks or rainbow-table computation.

Core Capabilities and Deployment

In terms of security category, it is not a firewall, EDR, or vulnerability scanner, but rather a hash-processing tool for red teams and penetration testing. The text states that around 100 NetNTLMv1-ESS hashes can be processed in about 10 seconds. Results can be exported in Crack.sh- or Hashcat-compatible formats, or returned directly as NT hashes usable for Pass-the-Hash validation. Deployment is fairly flexible: users can either use the public online version or run the ShuckNT single script locally from GitHub. However, local mode requires downloading and converting the large HIBP database, so the barrier to entry is not low.

Pricing, Management, and Integrations

On pricing, the page clearly emphasizes that the service is free and can handle cases involving ESS/SSP or different challenge values. Integration mainly comes from compatibility with Crack.sh and Hashcat formats, as well as the ability to process challenges captured by tools such as Responder. Management and alerting features are largely absent: there is no visible account system, auditing, reporting, centralized alerting, or SLA information. The page only states that the online version does not retain records of user-submitted jobs.

Pros, Cons, and Who It’s For

Its strengths are speed, zero cost, and a highly focused use case. It can also be run locally without depending on the availability of Crack.sh. The limitations are equally clear: it can only succeed if the target NT hash has previously appeared in the HIBP leaked-hash database; it does not support NetNTLMv2; and it is not suitable for handling Active Directory computer accounts with automatically generated complex passwords. It is better suited to penetration testers, red teams, and password security researchers than to defensive teams looking for an enterprise-grade console.

Access from China and Alternatives

There is no textual evidence regarding access from mainland China or supported payment methods, so both are considered unknown. Since the service is free, no payment channels are disclosed. Alternative or complementary tools include Crack.sh and Hashcat. On the defensive side, organizations should phase out NetNTLMv1 wherever possible and move to NetNTLMv2, or preferably Kerberos.