Verizon consultants probed Targets network for weaknesses in the immediate aftermath of the 2013 breach. Verizon consultants were able to crack 472,308 of Target’s 547,470 passwords (86 percent) that allowed access to various internal networks, including; target.com, corp.target.com; stores.com. They also cracked 12 (34%) of 35 admin domain passwords, according to a recent KrebsOnSecurity post. The findings demonstrate that it really is important to put in place all the mundane security best practices widely talked about.”]
Source: https://www.computerworld.com/article/2988832/report-target-failed-on-security-basics.html