Cyber Grooming: An Increasing Threat

Introduction

In the labyrinthine world of cybersecurity, a new spectre has emerged from the digital ether, casting a long shadow over the seemingly impregnable orchards of Apple's macOS. This phantom, known as SpectralBlur, is a backdoor so cunningly crafted that it remained shrouded in the obscurity of cyberspace, undetected by the vigilant eyes of antivirus software until its recent unmasking. The discovery of SpectralBlur is not just a tale of technological intrigue but a narrative that weaves together the threads of geopolitical manoeuvring, the relentless pursuit of digital supremacy, and the ever-evolving landscape of cyber warfare.

SpectralBlur, a term that conjures images of ghostly interference and elusive threats, is indeed a fitting moniker for this new macOS backdoor threat. Cybersecurity researchers have peeled back the layers of the digital onion to reveal a moderately capable backdoor that can upload and download files, execute shell commands, update its configuration, delete files, and enter states of hibernation or sleep, all at the behest of a remote command-and-control server. Greg Lesnewich, a security researcher whose name has become synonymous with the relentless pursuit of digital malefactors, has shed light on this new threat that overlaps with a known malware family attributed to the enigmatic North Korean threat actors.

SpectralBlur similar to Lazarus Group’s KANDYKORN

The malware shares its DNA with KANDYKORN, also known as SockRacket, an advanced implant that functions as a remote access trojan capable of taking control of a compromised host. It is a digital puppeteer, pulling the strings of infected systems with a malevolent grace. The KANDYKORN activity also intersects with another campaign orchestrated by the Lazarus sub-group known as BlueNoroff, or TA444, which culminates in the deployment of a backdoor referred to as RustBucket and a late-stage payload dubbed ObjCShellz.

Recently, the threat actor has been observed combining disparate pieces of these two infection chains, leveraging RustBucket droppers to deliver KANDYKORN. This latest finding is another sign that North Korean threat actors are increasingly setting their sights on macOS to infiltrate high-value targets, particularly those within the cryptocurrency and blockchain industries. 'TA444 keeps running fast and furious with these new macOS malware families,' Lesnewich remarked, painting a picture of a relentless adversary in the digital realm.

Patrick Wardle, a security researcher whose insights into the inner workings of SpectralBlur have further illuminated the threat landscape, noted that the Mach-O binary was uploaded to the VirusTotal malware scanning service in August 2023 from Colombia. The functional similarities between KANDYKORN and SpectralBlur have raised the possibility that they may have been built by different developers with the same requirements. What makes the malware stand out are its attempts to hinder analysis and evade detection while using grant to set up a pseudo-terminal and execute shell commands received from the C2 server.

The disclosure comes as 21 new malware families designed to target macOS systems, including ransomware, information stealers, remote access trojans, and nation-state-backed malware, were discovered in 2023, up from 13 identified in 2022. 'With the continued growth and popularity of macOS (especially in the enterprise!), 2024 will surely bring a bevvy of new macOS malware,' Wardle noted, his words a harbinger of the digital storms on the horizon.

Hackers are beefing up their efforts to go after the best MacBooks as security researchers have discovered a brand new macOS backdoor which appears to have ties to another recently identified Mac malware strain. As reported by Security Week, this new Mac malware has been dubbed SpectralBlur and although it was uploaded to VirusTotal back in August of last year, it remained undetected by the best antivirus software until it recently caught the attention of Proofpoint’s Greg Lesnewich.

Lesnewich explained that SpectralBlur has similar capabilities to other backdoors as it can upload and download files, delete files and hibernate or sleep when given commands from a hacker-controlled command-and-control (C2) server. What is surprising about this new Mac malware strain though is that it shares similarities to the KandyKorn macOS backdoor which was created by the infamous North Korean hacking group Lazarus.

Just like SpectralBlur, KandyKorn is designed to evade detection while providing the hackers behind it with the ability to monitor and control infected Macs. Although different, these two Mac malware strains appear to be built based on the same requirements. Once installed on a vulnerable Mac, SpectralBlur executes a function that allows it to decrypt and encrypt network traffic to help it avoid being detected. However, it can also erase files after opening them and then overwrite the data they contain with zeros..

How to keep your Apple computers safe from hackers

As with the best iPhones, keeping your Mac up to date is the easiest and most important way to keep it safe from hackers. Hackers often prey on users who haven’t updated their devices to the latest software as they can exploit unpatched vulnerabilities and security flaws.

Checking to see if you're running the latest macOS version is quite easy. Just click on the Apple Logo in the top right corner of your computer, head to System Preferences and then click on Software Update. If you need a bit more help, check out our guide on how to update a Mac for more detailed instructions with pictures.

Even though your Mac has its own built-in malware scanner from Apple called xProtect, you should consider using one of the best Mac antivirus software solutions for additional protection. Paid antivirus software is often updated more frequently and you often also get access to other extras to help keep you safe online like a password manager or a VPN.

Besides updating your Mac frequently and using antivirus software, you must be careful online. This means sticking to trusted online retailers, carefully checking the URLs of the websites you visit and avoiding opening links and attachments sent to you via email or social media from people you don’t know. Likewise, you should also learn how to spot a phishing scam to know which emails you want to delete right away.

Conclusion 

The thing about hackers and other cybercriminals is that they are constantly evolving their tactics and attack methods. This helps them avoid detection and allows them to devise brand-new ways to trick ordinary people. With the surge we saw in Mac malware last year, though, Apple will likely be working on beefing up xProtect and macOS to better defend against these new threats.

References 

• https://www.scmagazine.com/news/new-macos-malware-spectralblur-idd-as-north-korean-backdoor
• https://www.tomsguide.com/news/this-new-macos-backdoor-lets-hackers-take-over-your-mac-remotely-how-to-stay-safe
• https://thehackernews.com/2024/01/spectralblur-new-macos-backdoor-threat.html

Introduction:

Welcome to the second edition of our blog on Digital forensics series. In our previous blog we discussed what digital forensics is,  the process followed by the tools, and the subsequent challenges faced in the field. Further, we looked at how the future of Digital Forensics will hold in the current scenario.  Today, we will explore differences between 3 particular similar sounding terms that vary significantly in functionality when implemented: Copying, Cloning and Imaging.

In Digital Forensics, the preservation and analysis of electronic evidence are important for investigations and legal proceedings. Replication of the data and devices is one of the fundamental tasks in this domain, without compromising the integrity of the original evidence. 

Three primary techniques -- copying, cloning, and imaging -- are used for this purpose. Each technique has its own strengths and is applied according to the needs of the investigation.

In this blog, we will examine the differences between copying, cloning and imaging. We will talk about the importance of each technique, their applications and why imaging  is considered the best for forensic investigations.

Copying

Copying means duplicating data or files from one location to another. When one does copying, it implies that one is using standard copy commands. However, when dealing with evidence, it might be hard to use copy only. It is because the standard copy can alter the metadata and change the hidden or deleted data .

 The characteristics of copying include: 

• Speed: copying is simpler and faster,compared to cloning or imaging.
•  Risk: The risk involved in copying is that the metadata might be altered and all the data might be captured.

Cloning

It is the process where the transfer of the entire contents of a hard drive or a storage device is done  on another storage device. This process is known as cloning . This way, the cloning process captures both the active data and the unallocated space and hidden partitions, thus containing the whole structure of the original device. Cloning is generally used at the sector level of the device. Clones can be used as the working copy of a device .

Characteristics of cloning: 

•  bit-for-bit replication: cloning keeps the exact content and the whole structure of the original device. 
• Use cases: cloning is used when it is needed to keep the original device intact for further examination or a legal affair. 
•  Time consuming: Cloning is usually longer in comparison to simple copying since it involves the whole detailed replication. Though it depends on various factors like the size of the storage device, the speed of the devices involved, and the method of cloning.

Imaging:

It is the process of creating a forensic image of a storage device. A forensic image is a replica copy of every bit of data that was on the source device, this including the allocated, unallocated, and the available slack space .

 The image is then used for analysis and investigation, and the original evidence is left untouched. Images can’t be used as the working copies of a device.  Unlike cloning, which produces working copies, forensic images are typically used for analysis and investigation purposes and are not intended for regular use as working copies.

Characteristics of Imaging:

•  Integrity: Imaging ensures the integrity and authenticity of the evidence produced
•  Flexibility: Forensic image replicas can be mounted as a virtual drive to create image-specific mode for analysis of data without affecting the original evidence . 
• Metadata: Imaging captures metadata associated with the data, thus promoting forensic analysis.

Key Differences

• Purpose: Copying is for everyday use but not good for forensic investigations requiring data integrity. Cloning and imaging are made for forensic preservation.
• Depth of Replication: Cloning and imaging captures the entire storage device including hidden, unallocated, and deleted data  whereas copying may miss crucial forensic data.
• Data Integrity: Imaging and cloning keep the integrity of the original evidence thus making them suitable for legal and forensic use. Which is a critical aspect of forensic investigations.
• Forensic Soundness: Imaging is considered the best in digital forensics due to its comprehensive and non-invasive nature.
• Cloning is generally from one hard disk to another, where as imaging creates a compressed file that contains a snapshot of the entire hard drive or a specific partitions

Conclusion

Therefore, copying, cloning, and imaging all deal with duplication of data or storage devices with significant variations, especially in digital forensic. However, for forensic investigations, imaging is the most selected approach due to the correct preservation of the evidence state for any analysis or legal use . Therefore, it is essential for forensic investigators to understand these rigorous differences to avail of real and uncontaminated digital evidence for their investigation and legal argument.

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One of the best forums for many video producers is YouTube. It also has a great chance of generating huge profits. YouTube content producers need assistance to get the most views, likes, comments, and subscribers for their videos and channels. As a result, some people could use YouTube bots to unnaturally raise their ranks on the YouTube site, which might help them get more organic views and reach a larger audience. However, this strategy is typically seen as unfair and can violate the YouTube platform’s terms of service.

As YouTube grows in popularity, so does the usage of YouTube bots. These bots are software programs that may automate operations on the YouTube platform, such as watching, liking, or disliking videos, subscribing to or unsubscribing from channels, making comments, and adding videos to playlists, among others. There have been YouTube bots around for a while. Many YouTubers widely use these computer codes to increase the number of views on their videos and accounts, which helps them rank higher in YouTube’s algorithm. Researchers discovered a new bot that takes private information from YouTube users’ accounts.

CRIL (Cyble Research and Intelligence Labs) has been monitoring new and active malware families CRIL has discovered a new YouTube bot virus capable of viewing, liking, and commenting on YouTube videos. Furthermore, it is capable of stealing sensitive information from browsers and acting as a bot that accepts orders from the Command and Control (C&C) server to carry out other harmful operations.

The Bot Insight

This YouTube bot has the same capabilities as all other YouTube bots, including the ability to view, like, and comment on videos. Additionally, it has the ability to steal private data from browsers and act as a bot that takes commands from a Command and Control (C&C) server for various malicious purposes. Researchers from Cyble discovered the inner workings of this information breach the Youtube bot uses the sample hash(SHA256) e9dac8b677a670e70919730ee65ab66cc27730378b9233d944ad7879c530d312.They discovered that it was created using the.NET compiler and is an executable file with a 32-bit size.

• The virus runs an AntiVM check as soon as it is executed to thwart researchers’ attempts to find and analyze malware in a virtual environment.
• It stops the execution if it finds that it is operating in a regulated setting. If not, it will carry out the tasks listed in the argument strings.
• Additionally, the virus creates a mutex, copies itself to the %appdata% folder as AvastSecurity.exe, and then uses cmd.exe to run.
• The new mutex makes a task scheduler entry and aids in ensuring
• The victim’s system’s installed Chromium browsers are used to harvest cookies, autofill information, and login information by the AvastSecurity.exe program.
• In order to view the chosen video, the virus runs the YouTube Playwright function, passing the previously indicated arguments along with the browser’s path and cookie data.
• YouTube bot uses the YouTube Playwright function to launch the browser environment with the specified parameters and automate actions like watching, liking, and commenting on YouTube videos. The feature is dependent on Microsoft. playwright’s kit.
• The malware establishes a connection to a C2 server and gets instructions to erase the entry for the scheduled task and end its own process, extract log files to the C2 server, download and run other files, and start/stop watching a YouTube movie.
• Additionally, it verifies that the victim’s PC has the required dependencies, including the Playwright package and the Chrome browser, installed. When it gets the command “view,” it will download and install these dependencies if they are missing.

Recommendations

The following is a list of some of the most critical cybersecurity best practices that serve as the first line of defense against intruders. We propose that our readers follow the advice provided below:

• Downloading pirated software from warez/torrent websites should be avoided. Such a virus is commonly found in “Hack Tools” available on websites such as YouTube, pirate sites, etc.
• When feasible, use strong passwords and impose multi-factor authentication.
• Enable automatic software updates on your laptop, smartphone, and other linked devices.
• Use a reputable antivirus and internet security software package on your linked devices, such as your computer, laptop, and smartphone.
• Avoid clicking on suspicious links and opening email attachments without verifying they are legitimate.Inform staff members on how to guard against dangers like phishing and unsafe URLs.
• Block URLs like Torrent/Warez that might be used to propagate malware.To prevent malware or TAs from stealing data, keep an eye on the beacon at the network level.

Conclusion

Using YouTube bots may be a seductive strategy for content producers looking to increase their ranks and expand their viewership on the site. However, the employment of bots is typically regarded as unfair and may violate YouTube’s terms of service. Utilizing YouTube bots carries additional risk because they might be identified, which could lead to account suspension or termination for the user. Mitigating this pressing issue through awareness drives and surveys to determine the bone of contention is best. NonProfits and civil society organizations can bridge the gap between the tech giant and the end user to facilitate better know-how about these unknown bots.