Admin's '1337' Password Grants Domain Admin Access After EternalBlue Exploit
A penetration tester discovered an unpatched Windows 7 server vulnerable to EternalBlue, leading to the discovery of an admin password written in leetspeak that granted full network control.
A penetration tester tasked with assessing the security of a factory network gained domain administrator privileges by exploiting an unpatched Windows 7 server. The engagement, conducted by Dahvid Schloss of Suzu Labs, aimed to verify the effectiveness of security measures implemented after a previous breach six months prior.
Schloss observed that many of the factory's servers were running the legacy Windows 7 operating system, a common practice in industrial environments due to proprietary software dependencies. Initially, his efforts to gain access were hampered as most of these servers were disconnected from the domain, rendering common network exploitation techniques like EternalBlue ineffective for lateral movement.
However, upon identifying a Windows 7 server connected to the factory's CNC milling machines and, crucially, to the domain, Schloss was able to proceed. This server was vulnerable to the EternalBlue exploit, allowing him to dump credentials from the Local Security Authority Subsystem Service (LSASS).
Among the credentials obtained was a pair from WDigest, one of which appeared to be an administrator account. The associated password, "heyhackergof***yourself" written in leetspeak, initially struck Schloss as a deliberate taunt rather than a legitimate credential. He set it aside, assuming it was a trap or a test.
During a post-engagement briefing, Schloss inquired about the unusual password. The IT team's reaction revealed that this was indeed the actual password for a senior IT manager's administrative account. The password was a crude, albeit memorable, message intended for any hackers who might breach their systems again.
Upon testing the credentials, Schloss was granted complete control over the entire network. He discovered that many other administrative accounts also used similar insult-based passwords, reflecting the team's lingering anger from the previous breach.
The incident underscores a critical security lesson: the primary vulnerability was not the weak or embarrassing password, but the unpatched, legacy operating system connected to the domain. The outdated machine provided the entry point, highlighting the persistent risks associated with failing to patch systems and maintain modern, supported operating systems.
This case serves as a stark reminder that while strong password policies are important, they are insufficient if underlying system vulnerabilities remain unaddressed. The factory's attempt to deter attackers with a defiant password ultimately failed due to a fundamental lapse in patch management.