Hi Thomas,

Sorry for the delay...I just saw this come through. I ran a similar test:

$ volatility printkey -K "Software\\Classes"
Volatility Foundation Volatility Framework 2.5
Legend: (S) = Stable   (V) = Volatile

----------------------------
Registry: \??\C:\Users\user\ntuser.dat
Key name: Classes (V)
Last updated: 2016-03-10 20:19:33 UTC+0000

Subkeys:

Values:
REG_LINK      SymbolicLinkValue : (V)
\Registry\User\S-1-5-21-928030315-4021721725-3028358750-1000_Classes
----------------------------
Registry: \SystemRoot\System32\Config\DEFAULT
Key name: Classes (S)
Last updated: 2009-07-14 04:48:57 UTC+0000

Subkeys:
  (S) Local Settings

The SymbolicLinkValue is pointing to another hive it appears. For
example if you use hivelist and look for the user's usrclass.dat:

$ volatility hivelist | grep -i usrclass.dat

0xfffff8a0017b0010 0x000000000db8b010
\??\C:\Users\user\AppData\Local\Microsoft\Windows\UsrClass.dat

Then you can print that hive and see its Key name is the same as the
symbolic link above:

$ volatility printkey -o 0xfffff8a0017b0010
Volatility Foundation Volatility Framework 2.5
Legend: (S) = Stable   (V) = Volatile

----------------------------
Registry: \??\C:\Users\user\AppData\Local\Microsoft\Windows\UsrClass.dat
Key name: S-1-5-21-928030315-4021721725-3028358750-1000_Classes (S)
Last updated: 2016-01-07 15:30:19 UTC+0000

Subkeys:
  (S) Local Settings

So then you could traverse into there with -o 0xfffff8a0017b0010 -K
"Local Settings"

Also note that if you're looking for the local machine's CLSIDs, then
you would leave off the "Software" prefix (since they're found in the
SOFTWARE hive):

$ volatility printkey -K "Classes\\CLSID"
Volatility Foundation Volatility Framework 2.5
Legend: (S) = Stable   (V) = Volatile

----------------------------
Registry: \SystemRoot\System32\Config\SOFTWARE
Key name: CLSID (S)
Last updated: 2016-02-27 23:52:47 UTC+0000

Subkeys:
  (S) CLSID
  (S) {0000002F-0000-0000-C000-000000000046}
  (S) {00000300-0000-0000-C000-000000000046}
  (S) {00000301-A8F2-4877-BA0A-FD2B6645FB94}
  (S) {00000303-0000-0000-C000-000000000046}
  (S) {00000304-0000-0000-C000-000000000046}
[snip]

The hive_name parameter to regapi is best described by looking at the
set_current method:

https://github.com/volatilityfoundation/volatility/blob/master/volatility/plugins/registry/registryapi.py#L86

It looks like you can access a particular user's ntuser.dat by just
supplying user="username" instead of hive_name. Don't quote me on that,
but it looks like that would work.

Hope this helps!
MHL

On 2/26/16 7:01 AM, Thomas Chopitea wrote:
> Dear vol-users,
>
> I'm trying to get data from a volatile registry key using
> the regapi / rawreg classes in volatility.
>
> The key I'm looking for is under HKCU\Software\Classes\, and is called CLSID
>
> vol.py
> --plugins='/Users/tomchop/Infosec/Forensics-RE/volatility-plugins/volatility-autoruns'
> -f Windows\ 7\ x64-aa76b309.vmem --profile=Win7SP1x64 printkey -K
> "Software\\Classes\\CLSID"
> Volatility Foundation Volatility Framework 2.4
> Legend: (S) = Stable   (V) = Volatile
>
> The requested key could not be found in the hive(s) searched
>
> So I go up one level:
>
> vol.py
> --plugins='/Users/tomchop/Infosec/Forensics-RE/volatility-plugins/volatility-autoruns'
> -f Windows\ 7\ x64-aa76b309.vmem --profile=Win7SP1x64 printkey -K
> "Software\\Classes"
> Volatility Foundation Volatility Framework 2.4
> Legend: (S) = Stable   (V) = Volatile
>
> ----------------------------
> Registry: \??\C:\Users\admin\ntuser.dat
> Key name: Classes (V)
> Last updated: 2015-04-11 18:04:18 UTC+0000
>
> Subkeys:
>
> Values:
> REG_LINK      SymbolicLinkValue : (V)
> \Registry\User\S-1-5-21-978483858-511166411-2750856381-1000_Classes
> ----------------------------
> Registry: \SystemRoot\System32\Config\DEFAULT
> Key name: Classes (S)
> Last updated: 2009-07-14 04:48:57 UTC+0000
>
> Subkeys:
>   (S) Local Settings
>
> Values:
>
> How can I query this key and keep on drilling its subkeys ?
>
> Also, my plugin is making extensive use of rawreg because I try to get
> each individual NTUSER.dat hive, and I don't know which hive_name to
> pass on to regapi. Should I use the full hive name, as
> in self.hive_name(obj.Object("_CMHIVE", vm = addr_space, offset =
> hive_offset)), or is there a better way of doing it?
>
> Any help is greatly appreciated. Have a great day!
>
> --
> Thomas Chopitea
>
>

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