SANS Digital Forensics and Incident Response Blog: Category - Drive Encryption

Images and dm-crypt and LVM2... Oh my!

Hal Pomeranz, Deer Run Associates

Disk layouts using the Linux Logical Volume Manager (LVM2) are increasingly becoming the norm for new Linux installs. And very often the physical volume used by LVM2 has been encrypted via dm-crypt. A recent email from a Sec508 student asking for a procedure for mounting these images prompted me to codify this information into a blog posting.

Investigating the Image

When initially presented with the image, you may not know whether LVM2 or dm-crypt has been employed. So let's start from scratch:

# md5sum sda.dd
f4c7a8d54b9b0b0b73ec03ef4cf52f42 sda.dd
# mmls -t dos sda.dd
DOS Partition Table
Offset Sector: 0
Units are in 512-byte sectors

Slot Start End Length Description
00: Meta

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Digital Forensics Case Leads: ATT/Apple Rushes in The Forensics and Incident Response Team

A web application flaw was announced late Wednesday that appears to impact users of the 3G Apple iPad. According to press reports, AT&T is rushing in a forensic team in an attempt to determine the damage the flaw may have inflicted.

Gadget blog Gizmodo reports that a flaw in web application used to sign onto to an Apple/AT&T 3G iPad account allows an attacker to get into the account by incrementing the serial numbers on the SIM card on 3G iPads. It is not unusual for a web development team to not focus on using secure methods like using random numbers in generating web sessions. If there is no web application security team in place, these flaws can live on for years in web applications and sites.

AT&T claims that the team that discovered the flaw did not use responsible disclosure to alert AT&T and Apple about the flaw before going public. AT&T said that they closed this

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Digital Forensics Case Leads: New Gear, New PDFs Abuse, and Defeating TrueCrypt

Logicube releases new forensics gear, Didier Stevens discovers a new way to do interesting things with a PDF and a cooperative user, and Passware provides a means to defeat TrueCrypt.

Logicube has released two devices which look interesting. The MPFS or Massive Portable Forensic Storage provides up to 8TB of storage capacity for acquiring multiple images. The device may be attached to a forensic analyst's workstation via firewire, USB, or eSATA. The unit is compatible with Logicube's Dossier imager and Logicube's second new device, the NETConnect which as the name suggests, allows network access to forensic images. Based on the description, NETConnect is essentially a file server which enables multiple investigators to access forensic images as soon as they are acquired. The device supports Windows, Mac, and Linux and includes support for CIFS and NFS. (I've not had the opportunity to test either device but if Logicube or anyone else wants to send me a set, I will be

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Digital Forensics Case Leads: Tools and Lists, Bugs, and Web 2.0 for Packet Ninjas

A variety of items this week, including news of the first successful prosecution using memory forensics, several tool updates, a Web 2.0 site for packet ninjas, bugs (the tiny biological kind) for forensics, and even forensics for mortgage refinancing. I've included Twitter handles in the form (@TwitterHandle) where applicable.

Tools:

  • Tableau (@tableauforensic), maker of write-blocker and duplicating hardware and software, has initiated a video series to update viewers on info about their products and items of general interest. The first entry concerns their firmware update tool. The Tableau T35e write blocker is provided as part of the

Decrypting a PointSec Encrypted Drive Using Live View, VMWare, and Helix

Doing it the HARD way!

Perhaps you remember my previous blog on EnCase and PointSec, which included my plea for Guidance Software and CheckPoint to work together to create a seamless way to decrypt drives without having to go through 20 or 30 steps to get there. I even wrote, out of desperation, A Case for Decryption of the Original, because it would save time consuming steps and not change the data relevant to an investigation.

Time for an update. As noted in my last blog on decrypting the original, VMWare no longer recognizes a raw disk as a valid disk image. Images have to be converted before

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