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Disk acquisition and access

 Goal for this lab is after we acquire the disk in .E01 format then how can we mount this to linux system for analysis. 

দুইটা scenario cover করছি: (A) simple E01 + LVM (single disk), (B) E01 + Software RAID + LVM (multi-disk, যেমন disk1/disk2)

From the linux analysis vm like sansforensic vm, you need to run the following commands. 

We need to first create the working directories:

mkdir -p /mnt/case/img /mnt/case/data

E01 + LVM (single disk) - First case.

Step 1 — E01 mount:

ewfmount Webserver.E01 /mnt/case/img

ls -lh /mnt/case/img

total 0 

-r--r--r-- 1 root root 32G Feb 16 18:21 ewf1

Ewf1 is a raw disk image. It's size and main disk size are same. This is in read-only mode. See the permission.

Step 2 — See the partition layout:

mmls /mnt/case/img/ewf1

কোন offset-এ কোন partition আছে (boot, lvm ইত্যাদি) note করুন। RAID sign (0xfd) আছে কিনা খেয়াল করুন — থাকলে Scenario B তে যান।

Step 3 — Non-LVM partition (যেমন /boot) check:

fsstat -o 2048 /mnt/test/img/ewf1 (-o 2048)

or

fsstat -o <boot_start_sector*512> /mnt/case/img/ewf1 (-o 2048*512 = 1048576)

Why we are multiplying it by 512? See the above image. It is written that Units are in 512-byte sectors.

Unmounted Improperly means, it did not shutdown properly. 

Step 4 — Now we need to make LVM partition for loopback device:

losetup -rf -o $((<lvm_start_sector>*512)) /mnt/case/img/ewf1

losetup -rf -o $((501760*512)) /mnt/case/img/ewf1

losetup -a (Using this command we can know which loopback device it got. In this case loop0)

file -s /dev/loop0 (It will confirm whether this is LVM2 PV or not.The file command tells us that the loopback device is pointing to a Linux LVM v2 Physical Volume (“LVM2 PV”). So we are on the right track!)

We are using case directory here instead of test directory. 


Step 5 — LVM activation:




Avi

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