Advanced hacking toolkit Winos4.0 spreads across the globe, security experts warn. Originally reported by Trend Micro, this new toolkit-just like known kits Cobalt Strike and Sliver-was connected to a string of recent cyber attacks in China, having initially spread through fake software downloads. This year, Fortinet reported that the toolkit is also disseminated through game-themed files, which now tends to expand and might pose a risk to a larger user base.
Attack Framework
Winso4.0 is a post-exploitation toolkit: after successfully gaining initial access to a system, the attackers use it for further invasion and domination. First, it was discovered inside the applications downloaded by users who considered it software in their interest, including VPNs or Google Chrome downloads for the Chinese market. Under the aliases Void Arachne or Silver Fox, the attackers entice users with these very popular applications full of malicious components designed to compromise their systems.
New strategies involve attackers using game applications, via which they have broadcasted Winos4.0, again targeting Chinese users mainly. This way, hackers change and utilise attractive downloads to penetrate devices.
Infection Stages
When one of such benign-looking files is downloaded by a victim, the Winos4.0 toolkit initiates a four-phase infection:
1. Stage 1: After installation, a DLL file you.dll, was retrieved from a remote domain. This file installed persistence on the device by setting values in the Windows Registry such that the malware would persist after the system restarts:.
2. Stage 2: At this step, the injected shellcode is loaded to download necessary APIs and communicate with a C2 server, which enables hackers to send commands and retrieve files from the infected device.
3. Stage 3: It fetches more encoded data from the C2 server in a second DLL file named上线模块.dll which saves to the Windows Registry to be used later, apart from updating server addresses to maintain an active link between the malware and its operators.
4. Final Stage: The last stage (login module.dll) will activate all main functions of the toolkit, including detailed system data gathering (like IP address and type of OS), detection of security tools, searching for crypto-wallets, and keeping a hidden backdoor. Through this backdoor connection, hackers can exfiltrate data, execute commands, and sustain their activity monitoring.
Evasion Techniques
Winos4.0 already has an inbuilt scanner for the detection of security products, including commercial products by Kaspersky, Avast, Bitdefender, and Malwarebytes. It will then change its behaviour to avoid detection or even quit if the toolkit finds itself running in an environment that is under surveillance. This versatility makes the tool very dangerous when it gets into cybercriminals' hands.
Emerging Menace
The fact that the toolkit Winos4.0 is still being used and fine-tuned points towards the growing importance of this toolkit in cyberattack strategies. As explained by Fortinet, it is a versatile and powerful framework "designed for remote control of compromised systems." Ongoing activity like this indicates that Winos4.0 is becoming a tool hackers like to use to gain control over Windows machines.
Preventive Actions
Always ready for downloading is a constant warning from the security experts to users, especially when it comes to free softwares or games which seem popular.
Avoid downloading applications and other forms of files from unknown sources. Even verifying if the software or file is coming from a legitimate source may also save it from infection. Moreover, one's security software must be updated frequently.
Knowing the threats of Winos4.0 would prevent many users from this malicious software by making them aware of this sophisticated malware.
Cyble Research and Intelligence Lab recently unearthed an elaborate, multi-stage malware attack targeting not only job seekers but also digital marketing professionals. The hackers are a Vietnamese threat actor who was utilising different sophisticated attacks on systems by making use of a Quasar RAT tool that gives a hacker complete control of an infected computer.
Phishing emails and LNK files as entry points
The attack initiates with phishing emails claiming an attached archive file. Inside the archive is a malicious LNK, disguised as a PDF. Once the LNK is launched, it executes PowerShell commands, which download additional malicious scripts from a third-party source, thus avoiding most detection solutions. The method proves very potent in non-virtualized environments in which malware remains undiscovered inside the system.
Quasar RAT Deployment
Then, the attackers decrypt the malware payload with hardcoded keys. Quasar RAT - a kind of RAT allowing hackers to obtain total access over the compromised system - is started up. Data can be stolen, other malware can be planted, and even the infected device can be used remotely by the attackers.
The campaign targets digital marketers primarily in the United States, using Meta (Facebook, Instagram) advertisements. The malware files utilised in the attack were designed for this type of user, which has amplified its chances.
Spread using Ducktail Malware
In July 2022, the same Vietnamese threat actors expanded their activities through the launch of Ducktail malware that specifically targeted digital marketing professionals. The group included information stealers and other RATs in its attacks. The group has used MaaS platforms to scale up and make their campaign versatile over time.
Evasion of Detection in Virtual Environments
Its superiority in evading virtual environment detection makes this malware attack all the more sophisticated. Here, attackers use the presence of the "output.bat" file to determine whether it's running in a virtual environment or not by scanning for several hard drive manufacturers and virtual machine signatures like "QEMU," "VirtualBox," etc. In case malware detects it's been run from a virtual machine, it lets execution stop analysis right away.
It proceeds with the attack if no virtual environment is detected. Here, it decodes more scripts, to which include a fake PDF and a batch file. These are stored in the victim's Downloads folder using seemingly innocent names such as "PositionApplied_VoyMedia.pdf."
Decryption and Execution Methods
Once the PowerShell script is fully executed, then decrypted strings from the "output.bat" file using hardcoded keys and decompressed through GZip streams. Then, it will produce a .NET executable running in the memory which will be providing further evasion for the malware against detection by antivirus software.
But the malware itself, also performs a whole cycle of checks to determine whether it is running in a sandbox or emulated environment. It can look for some known file names and DLL modules common in virtualized settings as well as measure discrepancies in time to detect emulation. If these checks return a result that suggests a virtual environment, then the malware will throw an exception, bringing all subsequent activity to a halt.
Once the malware has managed to infect a system, it immediately looks for administrative privileges. If they are not found, then it uses PowerShell commands for privilege escalation. Once it gains administrative control, it ensures persistence in the sense that it copies itself to a hidden folder inside the Windows directory. It also modifies the Windows registry so that it can execute automatically at startup.
Defence Evasion and Further Damage
For the same purpose, the malware employs supplementary defence evasion techniques to go unnoticed. It disables Windows event tracing functions which makes it more difficult to track its activities by security software. In addition to this, it encrypts and compresses key components in a way that their actions are even more unidentifiable.
This last stage of the attack uses Quasar RAT. Both data stealing and long-term access to the infected system are done through the use of a remote access tool. This adapted version of Quasar RAT is less detectable, so the attackers will not easily have it identified or removed by security software.
This is a multi-stage malware attack against digital marketing professionals, especially those working in Meta advertising. It's a very sophisticated and dangerous operation with phishing emails, PowerShell commands combined with advanced evasion techniques to make it even harder to detect and stop. Security experts advise on extreme caution while handling attachment files from emails, specifically in a non-virtualized environment; all the software and systems must be up to date to prevent this kind of threat, they conclude.
Your IP address may look like a long number row, but to a hacker, it can be an instrument of evil activity. While your exposure to an IP doesn't pose an immediate danger per se, it is thus important to understand what a hacker can do with it. Let's break down how cybercriminals can exploit an IP and how you can keep it safe.
Determining Your Broad Area of Location
The very first thing a hacker will easily know once he has obtained your IP address is your general area of location. He can find out your city or region using even simple online tools such as IP tracking websites. Of course, he won't pinpoint the street number but can already pinpoint your general area or location which may trigger other related hacking attempts such as phishing attacks. Hackers would use your address and ISP to dupe you through social engineering.
IP Spoofing: Identity Mimicry Online
The hacker can manipulate the IP addresses and make it seem like the actions they are performing are coming from your device. In this method, which is known as IP spoofing, hackers perpetrate various illegal activities while concealing identities. Many people employ IP spoofing in DDoS attacks whereby hackers inject tremendous amounts of traffic into a network to actually shut it down. Using your IP address during this attack may keep them undetected while they wreck the damage.
Selling Your IP Address
One seems minute, but hackers sell bundles of thousands of IP addresses in bulk across the dark web, and those addresses can be used in large-scale social engineering projects that lead to data theft. Used with other personal data, your IP address can be a wonderful commodity in some hacker's arsenal, allowing them to crack into almost any online account.
Scanning for Further Information
Using this method, and with the use of such tools as Nmap, hackers can not only obtain your IP but also uncover which OS your machine is running, applications that are installed, and open ports. If vulnerabilities exist in your system, they can launch specific attacks on those particular weaknesses, which will then allow them to get into your network, and even control your devices.
A DDoS attack
Although it is seldom that DDoS attacks any user, hackers can use your IP to attack you using DDoS, which will turn your device into a traffic flooder and take it offline. Such attacks are usually employed in larger organisations, although those engaging in activities such as online gaming and other competitive activities are also at risk. For instance, some players have used DDoS attacks to cut off their opponents' internet.
How to Hide Your IP Address
The likelihood that someone actually targeted you may be low, but this is equally as important to adhere to these safety precaution guidelines. With a virtual private network or a proxy server, your public IP address remains hidden, which makes it extremely hard for hackers to find and take advantage of it. It can also protect your devices by updating them as regularly as possible and using firewalls.
It is important to note that knowing an IP address doesn't give hackers total control over your system. However, it can be part of a scheme that encourages them to come closer to extracting more personal information or conducting attacks. However, usually there's little chance that someone would go out of his way to harm you using just your IP address; still, you can never be too safe. Securing the network and masking the IP simply reduces these risks from IP-based attacks.
Care needs to be taken, and preventative measures need to be in place so that nobody would use those malpractices against you.
Foreign hackers are increasingly targeting Taiwan by hijacking social media accounts to spread disinformation aimed at undermining the country's military, according to a statement released by the Ministry of Justice Investigation Bureau (MJIB) yesterday.
The hackers, believed to be operating from abroad, are using compromised Internet-connected devices, including surveillance cameras and facial recognition systems, to gain unauthorised access to social media accounts on popular platforms like Dcard and PTT (Professional Technology Temple). By infiltrating these forums, they have been able to post false information that seeks to damage the reputation of Taiwan’s armed forces.
One of the key tactics employed by these cybercriminals is impersonating Taiwanese air force personnel. They have posted misleading content claiming that many military pilots are dissatisfied with their pay and working conditions. Some posts suggest that pilots would rather incur tremendous financial losses than renew their contracts, while others falsely claim that military members are leaving their posts to pursue civilian careers for better work-life balance.
On PTT, an account named “ss900287” further amplified these messages by sharing a link to a photograph that supposedly showed a list of retired military pilots applying for jobs with China Airlines. This, however, is another example of the misinformation being spread to create doubt and discontent among the public regarding Taiwan’s military.
Rise in False Posts Across Social Media
Despite the efforts of the Air Force Command to counteract these false narratives, there has been a noticeable increase in similar disinformation across more than 170 suspicious Facebook groups, including names such as “The Strait Today,” “Commentary by the Commander,” and “You Ban, Me Mad.” These groups are suspected of being part of the coordinated effort to spread misleading content.
Advanced Techniques to Evade Detection
According to the MJIB, the hackers have been able to maintain their disinformation campaign by exploiting vulnerabilities in facial recognition systems, digital cameras, and other networked devices. By stealing personal data and taking over social media accounts, they have managed to pose as legitimate users, making their disinformation appear more credible.
To avoid detection, the hackers have employed sophisticated methods such as data de-identification and rerouting their activities through multiple channels, which has made it difficult to trace their identities and locations. In response, the MJIB has notified social media platforms, requesting that they take action against the groups and users involved in these activities.
The MJIB is advising Taiwanese citizens to gear up the security of their Internet-connected devices. This includes setting strong, unique passwords and regularly updating them to minimise the risk of cyberattacks.
In a related development, fishermen in Penghu County have reported sightings of Chinese fishing boats using fake Taiwanese radar transponder codes in waters near Cimei Township. While these vessels initially appeared to be Taiwanese on radar, visual inspections confirmed their Chinese origin. The Coast Guard Administration has stated that any illegal vessels identified will be expelled from Taiwanese waters.
The reason behind the Chinese fishing boats disguising their transponder codes remains unclear, but it has raised concerns about the potential for further deceptive activities in the region.
France's cybersecurity agency, ANSSI, has issued a notice outlining a Russian spear phishing attempt aimed at French diplomats, the Record writes. The CIA connects the campaign to "Nobelium," a threat actor linked to Russia's Foreign Intelligence Service (SVR).
Nobelium, believed to have ties to Russia’s Foreign Intelligence Service (the SVR), primarily uses compromised legitimate email accounts belonging to diplomatic staff to conduct these attacks. The goal is to exfiltrate valuable intelligence and gain insights into French diplomatic activities.
These events included the penetration of email accounts at the French Ministry of Culture and the National Agency for Territorial Cohesion, but according to ANSSI, the hackers were unable to access any elements of those networks other than the compromised inboxes.
However, the hackers subsequently used those email addresses to target other organizations, including France's Ministry of Foreign Affairs. ANSSI stated that Nobelium attempted to acquire remote access to the network by installing Cobalt Strike, a penetration testing system infamous for being abused by bad actors, but was unsuccessful.
Other occurrences reported by ANSSI included the use of a French diplomat's stolen email account to send a malicious message falsely proclaiming the closure of the French Embassy in South Africa due to an alleged terror assault.
Nobelium’s spear phishing campaigns are highly targeted. They craft convincing lure documents tailored to specific individuals within diplomatic institutions, embassies, and consulates. Here are some tactics and techniques they employ:
Email Spoofing: Nobelium impersonates trusted senders, often using official-looking email addresses. This makes it challenging for recipients to discern the malicious intent.
Lure Documents: The threat actor attaches seemingly innocuous files (such as PDFs or Word documents) to their emails. These files contain hidden malware or exploit vulnerabilities in software applications.
Social Engineering: Nobelium leverages social engineering techniques to manipulate recipients into opening the attachments. They might use urgent language, reference official matters, or create a sense of curiosity.
Credential Harvesting: Once the recipient opens the attachment, the malware may attempt to steal login credentials or gain unauthorized access to sensitive systems.