Thanks so much for the email - extremely useful already.
I'm taking notes so that I can do my best at writing it up at the end.
So, with pslist I found one instance of TrueCrypt.exe which had a PID of
4920.
With handles --pid=4920 there was nothing useful - all very much T/C stuff.
So I did handles without the --pid.
Now, with my test data I of course know the name of the T/C volume file and
sure enough I could see it:
Offset(V) Pid Handle Access
Type Details
------------------ ------ ------------------ ------------------
---------------- -------
0xfffffa8002193b30 4 0x269c 0x2a
Process TrueCrypt.exe(4920)
0xfffffa80021a63c0 4 0x2a1c 0x12019f
File \Device\HarddiskVolume10\MyTrueCryptVolume # Here!
0xfffffa8002193b30 796 0x6c0 0x1fffff
Process TrueCrypt.exe(4920)
0xfffffa8002193b30 836 0xc28 0x1478
Process TrueCrypt.exe(4920)
0xfffffa8002193b30 1144 0xd4c 0x1478
Process TrueCrypt.exe(4920)
0xfffffa8001b4f070 2700 0x1084 0x100081
File \Device\TrueCryptVolumeT\
0xfffffa8002c7d1c0 2700 0x1118 0x100081
File \Device\TrueCryptVolumeT\
0xfffffa8001e51f20 4920 0x324 0x100080
File \Device\TrueCrypt
0xfffffa80038e4680 4920 0x330 0x1f0001
Mutant TrueCryptTaskBarIcon
0xfffffa8004d5a8d0 3384 0xc 0x100020
File \Device\TrueCryptVolumeT\
In my real case I don't know the name of the file - so I wouldn't know it
if I saw it - especially if it had an innocent name like "school_work.doc".
I now know my T/C volume is mounted as T:
I notice that there are 2 PIDs accessing the T:
Look them up in the plist data and they're explorer and notepad (which is
correct, I'd opened a txt file from the T/C volume).
So, pretending I hadn't seen 'MyTrueCryptVolume' I tried symlinks and
grep'd for TrueCrypt:
Offset(P) #Ptr #Hnd Creation time
From
To
------------------ ------ ------ ------------------------
--------------------
------------------------------------------------------------
0x0000000026b33c80 1 0 2012-08-16 19:12:51
Volume{3d...10a7e8a}
\Device\TrueCryptVolumeT
0x0000000037f51b10 1 0 2012-08-16 18:14:48
TrueCrypt
\Device\TrueCrypt
0x0000000052ececb0 1 0 2012-08-16 19:12:51
T:
\Device\TrueCryptVolumeT
0x000000006131c9d0 1 0 2012-08-16 19:12:51
T:
\Device\TrueCryptVolumeT
So, definitely T: then.
So I know there's a T/C volume mounted, I know that it's mounted as the T:
and I know that explorer and notepad have both got handles to it.
I've got one last hurdle to clear: how do I find out the file which is
behind \Device\TrueCryptVolumeT?
I filtered handles for File objects from \Device\HarddiskVolume* but that
left me with ~130 files and without knowing the file name how would I
identify it?
Thanks again for all the suggestions so far!
On Thu, Aug 16, 2012 at 8:04 PM, Andrew Case <atcuno(a)gmail.com> wrote:
Hello,
So I will assume you are using the latest release of Volatility, which
means the 2.1 command reference will give you information about every
plugin we have:
http://code.google.com/p/volatility/wiki/CommandReference21
The next thing I would do is run the handles plugin [1] and look for
any reference to the open file. You can filter with the -p option to
be only the TrueCrypt process that you found in pslist, but if you do
not see any encrypted container referenced there then you may want to
run it across all processes (the default) because we have seen where
files opened by drivers end up in other processes' handles (e.g.
SYSTEM).
I think handles would be more helpful to determine if any files were
opened b/c it will show you exactly what truecrypt had open when the
machine hibernated. With filescan you would have to already know the
name of the encrypted container to see if it was ever opened.
Also, MHL suggested using the symlink scan command [2] as this will
map drive letters to physical device paths. Here is some sample output
for the command:
$ python vol.py -f win7x64cmd.dd --profile=Win7SP1x64 symlinkscan
Volatile Systems Volatility Framework 2.2_alpha
Offset(P) #Ptr #Hnd Creation time From
To
------------------ ------ ------ ------------------------
--------------------
------------------------------------------------------------
0x0000000007331840 1 0 2011-12-30 08:26:15 Global
\Global??
0x0000000013d6a930 1 0 2012-01-10 18:35:28 Z:
\Device\LanmanRedirector\;Z:0...000003b08d\10.1.47.238\setup
0x0000000023bc0140 1 0 2011-12-30 08:25:30 A:
\Device\Floppy0
0x000000002ab23430 1 0 2011-12-30 08:25:30 D:
\Device\CdRom0
0x000000002d3b8c90 1 0 2011-12-30 08:25:26 C:
\Device\HarddiskVolume2
And you can see, C: is mapped to HarddiskVolume2. From there you can
run handles and filter specifically to files opened on that device
like this:
$ python vol.py -f win7x64cmd.dd --profile=Win7SP1x64 handles -t File
| grep HarddiskVolume2
Volatile Systems Volatility Framework 2.2_alpha
0xfffffa800248e5a0 4 0x5c 0x12008b File
\Device\HarddiskVolume2\Windows\System32\wfp\wfpdiag.etl
0xfffffa800267f300 4 0xa4 0x13019f File
\Device\clfs\Device\HarddiskVolume2\$Extend\$RmMetadata\$TxfLog\$TxfLog
0xfffffa800267b540 4 0xa8 0x12019f File
\Device\clfs\Device\HarddiskVolume2\$Extend\$RmMetadata\$TxfLog\$TxfLog
0xfffffa8002671350 4 0xac 0x13019f File
\Device\clfs\Device\HarddiskVolume2\$Extend\$RmMetadata\$TxfLog\$TxfLog
0xfffffa80026794e0 4 0xb0 0x12019f File
\Device\HarddiskVolume2\$Extend\$RmMetadata\$TxfLog\$TxfLogContainer00000000000000000002
0xfffffa8002679c30 4 0xb4 0x1 File
\Device\HarddiskVolume2
If the combination of handles and symlinkscan does not answer your
question please write back. Also, it would be interesting if you
documented your process through this (assuming you can), as I am sure
many other people will encounter this situation.
[1]
http://code.google.com/p/volatility/wiki/CommandReference21#handles
[2]
http://code.google.com/p/volatility/wiki/CommandReference21#symlinkscan
....
On Thu, Aug 16, 2012 at 8:41 AM, Adam Bridge <adam.bridge(a)yahoo.com>
wrote:
Hello All,
I'm new to Volatility but am a reasonably experienced forensic examiner.
I'm working on a hiberfil.sys from a WIN7SP1x64 machine and am trying to
determine whether a TrueCrypt volume was mounted and, for bonus points,
the
path to the TrueCrypt volume file.
I've used devicetree and found:
DRV 0x23ea15de0 \Driver\truecrypt
---| DEV 0xfffffa800946f080 TrueCryptVolumeG FILE_DEVICE_DISK
---| DEV 0xfffffa8007127ac0 TrueCrypt FILE_DEVICE_UNKNOWN
So a good start.
Question: Does that tell me that there _IS_ a TrueCrypt volume mounted as
the G drive or there _WAS_ a TrueCrypt volume mounted as the G drive, or
that there's no way of knowing one way or the other?
filescan shows two entries for \TrueCrypt.exe. The only difference
between
the two (besides a slight difference in #Ptr) is
that one has access of:
R--rwd
and the other:
R--r-d
What should I be discerning from this? Why does one have a write
permission
that the other does not?
And finally, pslist shows me that TrueCrypt.exe was started but has no
exit
time.
I'm just not really sure where to go next?
Can anybody suggest anything?
More than happy for someone to tell me to go read X! Just can't find a
helpful X to read.
Thank you all,
AB
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