Question

dumping NTLMv2 hashes

Asked by: dbrannigan

Hi There

Is there a way to view the NTLMv2 hashes on windows XP? I have LC4 this exposes the LM and NTLM hashes from the SAM

I am under the impression that NTLMv2 uses MD5 to generate the hash?

Thanks

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Asked On
2003-07-07 at 03:16:24ID20670320
Tags

ntlmv2

,

ntlm

Topic

Miscellaneous Security

Participating Experts
2
Points
125
Comments
5

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Answers

 

by: TheMCSEPosted on 2003-07-07 at 19:29:35ID: 8873872

NTLMv2 does appear to use MD5.  I am unsure about actually displaying the hashes.  What is it that you are trying to accomplish (just curious)?  Good luck!

http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q147/7/06.asp&NoWebContent=1

http://bfl.rctek.com/tools/?tool=hasher

 

by: amochkinPosted on 2003-07-07 at 23:14:22ID: 8874760

I would disagree with THEMCSE.
NTLMv2 uses MD4 for storage and it uses so called HMAC_MD5 for challenge/response.
Basically the only difference between NTLMv1 (aka NTLM) and NTLMv2 is C/R stuff.
Well, I am quite overloaded today, but what I am trying to say, is that v1 vs v2 comes up with challenge/response difference only.

Here is some formalized stuff:

LM
Password case sensitive: Nope
Hash key length: 56bit + 56bit
Password hash algorithm: DES (ECB mode)
Hash value length: 64bit + 64bit
C/R key length: 56bit + 56bit + 16bit
C/R algorithm: DES (ECB mode)
C/R value length: 64bit + 64bit + 64bit

NTLMv1
Password case sensitive: Yup
Hash key length: -
Password hash algorithm: MD4
Hash value length: 128bit
C/R key length: 56bit + 56bit + 16bit
C/R algorithm: DES (ECB mode)
C/R value length: 64bit + 64bit + 64bit

NTLMv2
Password case sensitive: Yup
Hash key length: -
Password hash algorithm: MD4
Hash value length: 128bit
C/R key length: 128bit
C/R algorithm: HMAC_MD5
C/R value length: 128bit

 

by: dbranniganPosted on 2003-07-08 at 03:34:01ID: 8875880

thanks

I am just curious on this point, a password for a particular account is

harlequin

However exposing the hashes via Lopth reveals the following md4? hash = 75ADBA804EC95ABC0468CD8BD1F07F31

However when using a md4 hash generating program harlequin = 516ED732E77605AACEC9F925C5FD68F6

Is there a step I am missing out here? are the passwords hashed then encrypted ie syskey etc?

Thanks

 

by: amochkinPosted on 2003-07-08 at 17:51:29ID: 8881605

Maybe you missed the point that passwords are being sent as UNICODE (!) to MD4 generator.
Therefore, your password in unicode hex will be: 68 00 61 00 72 00 6C 00 65 00 71 00 75 00 69 00
Try this now. Should be working ;)

 

by: amochkinPosted on 2003-07-08 at 17:55:16ID: 8881619

Funny thing, I remember I asked the same questions like 3-4 years ago when I was 19-20 yo.

20120131-EE-VQP-002

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