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Digital Crime Investigation Essay

1232 Words5 Pages

5. Proposed Work 5.1 Problem Definition Digital crimes have become blusterous worldwide as the intense growth of networks and other networked technology particularly the Internet develops. Criminals have now become handy in utilizing technologically based mediums to carry out different sorts of crimes. Consequently digital forensics has become a predominant field. Over the years development in the field has been tool centered, being driven by commercial developers of the tools used in the digital investigative process. This, along with having no set standards to guide digital forensics practitioners operating in the field has led to issues regarding the reliability, verifiability and consistency of digital evidence. Along with these, there …show more content…

”]”/e’ } Step 3: Postmortem Forensic Analysis A. Evidence Collection A.1 Detection & Identification of traces if (Heavy INBOUND||OUTBOUND Traffic from same SIP to same DIP) It’s a Trace of DoS else if (Length of Ru ≥ 75, with so many junk characters) Malware Downloaded else if (Occurrence of 10.X.X.X || 192.168.X.X || 127.0.0.1) It’s a Trace Anomalous or Susceptive Source else if (Ru=IP ADD || Length of Ru= too long || Length of Ru= tiny || Ru have @) It’s a Trace of Phishing else if (Rs=TCP_DENIED && HSC=403) It’s Trace of Faulty URL/Blocked URL/Server Failure A.2 Verify traces For verifying, try to visit susceptive URLs or can apply trace route on susceptive IP Address or can view captured data from Active Monitoring System (AMS). Tn = Total Traces collected; After verifying, True Traces TT = Tn - TF; En = TT {Because En ⊆ Tn}; A.3 Good enough is good enough Calculate/generate the hash value of evidences for assuring the integrity. SHA1 (En) { // returns 160 bit hash value H2 return H2; } B. Integrity Check After completing the investigation, again calculate/generate the hash value of access.log. And match it with the previously generated hash

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i. Manage The term manage is used to mean acquiring the necessary contractual vehicle and resources that include financial resources that are used in running forensic labs and programs. It can also be used to mean to coordinate and build internal and external consensus that can be used to develop and manage an organizational digital forensic program. Management also is to establish a digital forensic team, usually, the one that is composed of investigators, IT professionals and incidents handlers to perform digital and network forensics. Management provides adequate workspaces that at minimum take in to account

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“The special properties and technical complexity of digital evidence often makes it even more challenging, as courts find it difficult to understand the true nature and value of that evidence (Boddington, 2015)”. It’s not uncommon for innocents to be convicted and guilty people acquitted because of digital evidence (Boddington, 2015). However, other factors can also affect the validity of the evidence, including: failure of the prosecution or a plaintiff to report exculpatory data; evidence taken out of context and misinterpreted; failure to identify relevant evidence; system and application processing errors; and so forth (Boddington, 2015). “There is a perception, largely undeserved, that digital evidence somehow alters the true nature of the original evidence and is therefore unreliable. Presented properly, digital evidence is capable of being of tremendous assistance to the courts (Hak,

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Many insufficient technology caused this case to spend many years without being solved until forensic technology became the key factor in this

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The very first step after identifying and selecting the required computer forensics software our company needs, we need to test, verify, and validate the software otherwise the evidence we present would not be admitted in court. In the company, one of our main goals is to always follow the established standards set by federal agencies. For this purpose, when planning our procedure to validate our software, we must meet the standards set by the National Institute of Standards, and Technology, also known as NIST, which creates procedures and criteria for testing and validating computer forensics software and tools. In order to verify, test and validate the forensic software the company will be using we need to meet the criteria established by NIST in 2001 based on standard testing methods, the ISO 17025 criteria for items that have no current standards and the ISO 5725 criteria.

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Thus, forensic investigators, and also the courts, must trust that the vendor creating the software did so accurately, and has properly coded the software so as to obtain reliable results. Conversely, the source code of the software is typically made available in an open source tool, increasing one’s ability to test and assure the reliability of the software, and the accuracy of the results obtained. The National Institute of Standards and Technology provides a working group testing disk imagining tools that may be used in computer forensics, ensuring that the requirements are met. This is however merely one type of tool which is being tested, and whilst it is a step in the right direction, bodies such as the national institute of standards and technology do not assume liability for any results, nor do they certify

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Computer forensics processes must adhere to standards set by the courtroom that often complicates what could have been a simple data analysis. In court, knowing who connected to the system based on logs is not enough. There must be facts that will support those connection

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