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Casserly Consulting Blog

Tech Term: Computer Forensics, Defined

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Pop culture gives us an impression of what cyber investigations look like. Official-looking people, in impeccable suits, typing away at terminals and analyzing the data scrolling past them on their heads-up displays. In reality, computer forensics (as they are actually called) are a little less dramatic, and much more serious. For today’s tech term, we’ll dig into the field of computer forensics.

What are Computer Forensics, and What Are They Used For?
Computer forensics can be defined as the application of certain specialized techniques to locate and analyze the information on a computer or computer system, protecting it for use as evidence in a trial. Once the requisite warrants have been acquired, a forensic technician is tasked with isolating the device from outside influence by disconnecting it from the Internet before copying every file and poring over their contents for evidence.

The investigator must make a copy of these files so as to preserve the original evidence. Accessing a file can be enough to change it slightly, potentially rendering their evidence inadmissible.

Computer forensics can be leveraged in a wide variety of cases, as any given device may contain evidence of a crime to be, or that was, perpetrated, as well as effectively be the scene of the crime itself. An investigation dives deep, not only focusing on the presence of files, emails, or other documents pertinent to the case on the device, but also on an analysis of these items’ metadata, as it reveals when data appeared on a computer, when it was edited and saved last, and who the user was that carried out these actions.

These methods have been used to crack cases involving a dirty laundry list of crimes, as this sample of their uses suggests:

  • Intellectual Property Theft and Industrial Espionage
  • Employment Disputes
  • Bankruptcy Investigations
  • Inappropriate Email and Internet Usage in the Workplace
  • Regulatory Compliance
  • Forgeries and Fraud Investigations

Alternative Sources of Analysts
Of course, law enforcement are not the only bodies that maintain and utilize computer forensics labs. Six major companies, including Walmart, American Express, and Target, have accredited laboratories, and there are countless other independent labs that have not been accredited. These in-house labs can often outperform traditional law enforcement groups, as they are better able to keep their solutions on the cutting edge.

In fact, these labs are often recruited by law enforcement to assist in solving crimes. Target’s labs have announced in the past that they have assisted with “felony, homicide, and special-circumstances cases” on a volunteer basis for years, a spokesperson claiming in 2008 that a full quarter of cases worked by Target’s laboratory had nothing to do with the company.

How Does Your Technology Compare?
If you want a team on your side that will take as much care to protect your solutions as a computer forensics team does to track down cybercrime, give COMPANYNAME a call at PHONENUMBER.

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Casserly Consulting Blog

Essential Cybersecurity Tips From The FBI

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In 2016 former President of the United States Barack Obama passed the Cybersecurity National Action Plan that implemented near-term action and developed a longer-term strategy of bringing awareness and protections to public computing systems connected to the Internet. The strategy is to make an immediate effort to empower citizens to protect their own privacy, while also maintaining public safety and national and economic security, as many of the most critical systems this nation utilizes are networked on the web.

For the average small business, it is more crucial than ever to avoid the pitfalls that lay on the internet. Victims of cybercrime deal with an endless number of issues, including drops in revenue, data loss, downtime, and fines/restitution if they are unable to keep their networks secure. Below are a number of line-items that the Federal Bureau of Investigation recommends to keep your data secure, and to avoid becoming a victim of the most pressing malware on the Internet today: ransomware.

  • Raise Awareness: Ensure that you make a point to make your staff cognizant of the threat of a ransomware infection.
  • Updates and Patches: Make sure to patch your operating systems, software, and firmware on all of your digital assets.
  • Auto Update Security Software: Lean on enterprise-level antivirus and anti-malware software to conduct regular scans and catch potential malware.
  • Limit Super Users: Ensure that you don’t just hand out administrator access to your mission-critical systems. Managing access is one of the best ways to keep untrustworthy entities out of your network.
  • Access Control: As stated above, access control is essential to ensure that you know who can and should be in parts of your network. If your users only need read-specific information, they don’t need write-access to files or directories, mitigating risk.
  • Filters and Application Control: Deploy software restrictions to keep programs from executing from location where ransomware may be found. This includes temporary folders found to support Internet browsers and compression/decompression programs.
  • Data Backup & Disaster Recovery Plan: Create data redundancy by having a comprehensive backup and recovery plan in place.
  • Multiple Storages: Ensure that each storage unit is stand-alone to avoid major problems with backups and other forms of storage.

Governments absolutely have to have a strategic plan on how to deal with cybercrime, and as a solid practice, businesses should follow suit. If you want to make sure your strategies are top-level, visit https://www.fbi.gov/investigate/cyber/news to see what the FBI is doing to protect their computing infrastructure. For more great security information, subscribe to our blog.

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Security

These Police Officers Called for Backup… and it was Infected with Ransomware

b2ap3_thumbnail_police_ransomware_400.jpg The police exist to serve, protect, and enforce the law, but who can we turn to if even the cops are made victim of a cyberattack? This is the question the residents of Cockrell, Texas have to answer, as their police department fell victim to a ransomware attack known as the Osiris Ransomware.

Before you start to worry too much about this terrible new strain of ransomware, you should know that “Osiris” has been identified as a recent version of the Locky ransomware. The police department likely only referred to it as “Osiris” due to their encrypted files all sporting the extension “.osiris.”

This began as many ransomware attacks do; an on-screen message notified the police that their files had been locked, and would only be unlocked if the department paid up the demanded $4,000. As happens far too often, the ransomware was introduced into their system when a member of the department opened a spoofed email that appeared to be an official department communication. In keeping to best practices, the police’s IT department elected to restore the infected server’s files from a backup.

Unfortunately, the backup they had to restore from was taken after their systems had been infected, meaning that all they had were more locked and infected files.

This caused Cockrell authorities no small amount of trouble, as the encrypted files included years and years of photographic and video evidence to be used to prosecute cases. Time will only tell how much of an impact this will have on legal proceedings.

These events serve as a warning to all who rely on data in order to do their job, including businesses everywhere. It is essential to remember that your security is only as good as the people who are given access to your data. Furthermore, it reinforces the importance of keeping more than just one backup of your system. Backing up incrementally, and storing archived backups off site will usually safeguard a business from having the entire backup corrupted in the event of ransomware like this.

Reach out to us at PHONENUMBER so we can optimize your IT to protect you against ransomware and other critical issues.