NTFS File System timestamp Forensics Part 2


NTFS Time Stamp Forensics အဆက္ပါ  w10 မွာ thirdeye အမည္နဲ႕word,pdf,image file 3 ခု create လုပ္ထားလုိက္ပါတယ္။ timezone က GMT6:30 အခ်ိန္နဲ႕ပါ။ file တစ္ခုခ်င္းစီရဲ႕ metadata timestamp ကုိ ပုံမွာၾကည့္ႏုိင္ပါတယ္။





အခုအခ်ိန္မွာ window 10 u thirdeye အမည္နဲ႕word,pdf,image file 3 ခုကုိ

Window 7 (GMT7) ထဲကုိ ေျပာင္းထည့္လိုက္ပါတယ္။ file တစ္ခုခ်င္းစီရဲ႕ metadata , timestamp မွာ ေအာက္ပါအတုိင္းေျပာင္းလဲသြားတာ ေတြ႕ႏုိင္ပါတယ္။


ဒါေၾကာင့္ TimeZone လြဲေနတဲ့ GMT 7 နဲ႕ window 7 ကုိ Time Zone ေျပာင္းၿပီးေလ့လာၾကည့္ပါမယ္။ အခုအေနအထားမွာ  window 7 က vmdk file type ျဖစ္ပါတယ္။ vmdk file type ျဖစ္လုိ႕ vmware ကုိ dick image (bit by bit) Copy ယူပါမယ္။ Logical Drive တစ္ခုလုံးအစား အခုအခ်ိန္မွာ vmdk တစ္ခုကုိပဲ image ယူထားပါတယ္။ မစစ္ေဆးခင္မွာ forensics လုပ္တဲ့ workstation timezone သုိ႕မဟုတ္ forensics tools ရဲ႕ timezone ကုိခ်ိန္းထားရပါမယ္။ Example Encase , autopsy, FTK

Thirdeye ဆုိတဲ့ World file က forensics workstation မွာေျပာင္းလဲသြားပုံပါ

Thirdeye.World file ရဲ႕ Metadata ေတြပါ


 Case Back Ground (example)
Company တစ္ခုမွ အႀကီးတန္း ၀န္ထမ္းတစ္ဦးက company ကေနအလုပ္ရပ္စဲျခင္းခံရပါတယ္။ အလုပ္ကမထြက္ခင္ company မွ အေရးႀကီး file တစ္ခုကုိ ရည္ရြယ္ခ်က္တစ္ခုနဲ႕ ယူေဆာင္သြားပါတယ္။ဆက္ၿပီး အျပင္မွာ ျပန္လည္ေရာင္းခ်ျခင္းၿပဳလုပ္ပါတယ္။ အရင္ကလုပ္ထားသမွ်ကုိ ကြန္ပ်ဴတာထဲမွာ မထားရွိရဘူးဆုိတဲ့ လက္မွတ္လဲေရးထုိးထားပါတယ္။
စစ္ေဆးတဲ့အခ်ိန္မွာ ကြန္ပ်ဴတာက clock ကုိ backdate ၿပဳလုပ္ထားပါတယ္။

Back Date  ျပဳလုပ္ထားပုံ


Methodology နဲ႕ Hypothesis အပုိင္းကပ်င္းစရာေကာင္းတဲ့အတြက္ခ်န္လွ်ပ္ထားခဲ့ပါတယ္။စစ္ေဆးတဲ့ခါ Internet  History ,User ,Create time, USB history, နဲ႕ System ကုိစစ္ေဆးတဲ့အခါမွာ window time ကုိ back သုိ႕ေျပာင္းထားေၾကာင္းသိသာစြာေတြ႕ရမွာျဖစ္ပါတယ္။


Internet  History


 User  Account 


Create time


USB Attachment



Comments

Post a Comment

Popular posts from this blog

NTFS Index Attributes

Image
  NTFS Index Attributes Now that we have described the general concept of B-trees, we need to describe how they are implemented in NTFS to create indexes. Each entry in the tree uses a data structure called an index entry to store the values in each node. There are many types of index entries, but they all have the same standard header fields, which are given in Chapter 13. For example, a directory index entry contains a few header values and a $FILE_NAME attribute. The index entries are organized into nodes of the tree and stored in a list. An empty entry is used to signal the end of the list. Figure 11.18 shows an example of a node in a directory index with four $FILE_NAME index entries. Figure 11.18. A node in an NTFS directory index tree with four index entries. Figure 11.18 The index nodes can be stored in two types of MFT entry attributes. The $INDEX_ROOT attribute is always resident and can store only one node that contains a small number of index entries. The $INDEX_ROOT at...
Read more

B-Trees (NTFS)

Image
  B-Trees An NTFS index sort attributes into a tree, specifically a B-tree. A tree is a group of data structures called nodes that are linked together such that there is a head node and its branches out to the other nodes. Consider Figure 11.13(A), where we see node A on top and it links to nodes B and C. Node B links to nodes D and E. A parent node is one that links to other nodes, and a child node is one that is linked to. For example, A is a parent node to B and C, which are children of A. A leaf node is one that has no links from it. Nodes C, D, and E are leaves. The example shown is a binary tree because there are a maximum of two children per node. Figure 11.13. Examples of A) a tree with 5 nodes and B) the same tree that is sorted by the node values FIG- 11.3 Trees are useful because they can be used to easily sort and find data. Figure 11.13(B) shows the same tree as we saw on the left side, but now with values that are assigned to each node. If we are trying to look up a ...
Read more

eCDFP (Module-6) (Window Forensics) (Part - 1 )

Image
လက်ရှိအချိန်မှာ PC/Laptop သုံးစွဲတဲ့အထဲမှာ Window အသုံးပြုသူက ကမ္ဘာမှာ အများဆုံးဖြစ်ပါတယ်။ Operation System အနေနဲ့ကြည့်မယ်ဆိုရင် ဒုတိယအများဆုံးဖြစ်ပါတယ်၊ ပထမအများဆုံးကတော့ Android ဖြစ်ပါတယ်။ Window 1.0 ကနေ အခုနောက်ဆုံးထွက်တဲ့ Window 11 အထိမှာ လက်ရှိလူတွေ အများဆုံးအသုံးပြုတာကတော့ Window 10/ Window 11 ဖြစ်ပါတယ်။ Forensics Analysis လုပ်မယ်ဆိုရင် Window ကနေရနိုင်တဲ့ Artifact (2) မျိုးရှိပါတယ်။ (1) System Artifacts  (2) User Artifacts  System Artifacts  ကတော့ Window Operation System   ကနေရနိုင်တဲ့ Artifacts တွေဖြစ်ပါတယ်။  System Artifacts Example  Registry Artifacts Event Logs File System Artifacts (Master File Table) Prefetch Files Volume Shadow Copies  User Artifacts ကတော့ User အသုံးပြုတဲ့ Computer ပေါ်မှာ User ကနေအသုံးပြုတဲ့ Activity တွေဖြစ်ပါတယ်။ တစ်ကယ်တန်း Forensics Analysis လုပ်မယ်ဆိုရင် System Artifacts ကိုရော User Artifacts ကိုရော Analysis ပြုလုပ်ပါတယ်။  User Artifacts Example  UserAssist  LNK Files Browser Artifacts...
Read more