This type of crypter may use a simple XOR as well as some more complex XOR-based algorithms. Start from checking the simplest cases. If the typical algorithms does not work, you will need to analyze the unpacking function from the DLL. I already did analysis of some popular variant (read more here) and prepared a helper script: nsisdec.py
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Cybersecurity researchers recently uncovered a complex multi-stage cyber attack that uses invoice-themed phishing decoys to deliver a diverse range of malware, including Venom RAT, Remcos RAT, XWorm, NanoCore RAT, and even a stealer targeting cryptocurrency wallets.
The attack begins with email messages containing Scalable Vector Graphics (SVG) file attachments. These attachments serve as the initial lure, enticing recipients to click on what appears to be legitimate invoice-related content. However, doing so triggers a carefully crafted infection sequence. According to a technical report by Fortinet FortiGuard Labs, the infection uses a variety of tools to obfuscate its payload and evade traditional security mechanisms.
Central to this attack is the use of the BatCloak malware obfuscation engine and ScrubCrypt, a crypter. BatCloak, introduced in late 2022 and based on a predecessor tool called Jlaive, is designed to load the next-stage payload in a way that circumvents conventional malware detection methods. This allows attackers to deliver malicious software without raising immediate suspicion.
ScrubCrypt, a crypter initially documented by Fortinet in March 2023 in connection with a cryptojacking campaign by the 8220 Gang, is believed to be a later iteration of BatCloak. The combination of these tools creates a formidable defense-evading mechanism that complicates detection efforts.
In this latest campaign, the SVG file attachment acts as a gateway to drop a ZIP archive containing a batch script. This script, likely created using BatCloak, then unpacks another ScrubCrypt batch file, which ultimately executes Venom RAT. Before doing so, the script establishes persistence on the host system and bypasses Windows protections like AMSI (Antimalware Scan Interface) and ETW (Event Tracing for Windows).
Venom RAT, a fork of Quasar RAT, is a Remote Access Trojan that allows attackers to take control of the compromised system, collect sensitive information, and execute commands from a remote command-and-control (C2) server. It can also communicate with the C2 server to download additional plugins for different tasks, including keylogging, data exfiltration, and remote execution of additional malware like NanoCore RAT, XWorm, and Remcos RAT.
The plugin system in Venom RAT facilitates the delivery of additional malicious software, including a stealer that collects data from folders related to various cryptocurrency wallets and applications like Atomic Wallet, Electrum, Ethereum, Exodus, Jaxx Liberty, Zcash, and Telegram. This stolen data is then exfiltrated to a remote server, providing attackers with access to potentially valuable digital assets.
Security researcher Cara Lin notes that this attack represents a sophisticated approach, leveraging multiple layers of obfuscation and evasion techniques. By combining phishing emails with malicious attachments, obfuscated script files, and Guloader PowerShell, the attackers can infiltrate and compromise target systems. The deployment of plugins through different payloads showcases the versatility and adaptability of this attack campaign.
Given the complexity and adaptability of this attack, it is critical to implement comprehensive cybersecurity measures. Organizations and individuals should be cautious when opening email attachments, especially those with unfamiliar or suspicious content. Keeping software and operating systems up to date, using robust antivirus solutions, and educating users about phishing tactics are key steps to reduce the risk of falling victim to these attacks.
We find that hackers most often use their native tongue, and Arabic is the most widely used hacking language of the MENA region, followed by Farsi and Turkish. English is often used for hacking outside MENA, but within the region, it is not prevalent.
Searches using Arabic language hacking produced positive results for the MENA region and some communities outside MENA; such as India. Hackers who use the Farsi, which is commonly spoken in Iran, share many characters with traditional Arabic and have many cyber-related words which are similar. In Turkey, the Turkish language is most often used as a hacking language.
MENA hacker forums are much like those of the West. Typically they receive traffic from anyone who desires to develop their technical skills, and will freely communicate with others who seek the same. Common practice in these forums includes sharing hacking tools such as keyloggers, malware builders, crypters, and SQL injection tools.[1]
Some Arabic forums will at times claim their administrators will contact the Russians to build malware for them. In reality, they build it themselves.[4] The malware is typically subpar and receives bad ratings.
MENA region forums often build and sell Remote Access Trojans (RATs), which target Androids and IOS phones (Figure 4). Malware targeting cell phones is of especial concern to businesses that offer a Bring Your Own Device (BYOD) policy.
The Inj3ct0r and Exploit-db websites are repeatedly referenced with positive ratings for members across Arabic forums.[6] Both websites are used by many Arabic hackers to share and learn tradecraft. Iranians and Turkish cybercriminals also use these sources, but the majority of Iranians and Turks appear to write their own scripts and operate in separate groups. This suggests their attacks likely target different sectors than traditional Arab targets (Figures 5, 6).
Religious ideology often unites MENA cybercriminals and poses a significant threat to religious enemies and Western entities. These businesses and governments are being targeted by tools that are developed by more sophisticated users than the typical Kali Linux user. Cyber prevention is often difficult because many cyber security experts do not always understand Arabic hacker websites, databases and infrastructure. This is a result of a lack understanding of the languages, cultures and religions. This in turn leads to Western-directed attacks on critical infrastructure vulnerabilities, which are not normally identified until an attack is perpetrated. A better understanding of Arabic language and culture is needed, and until that understanding is attained, cyber security will not be able to be proactive in identifying and preventing MENA region hackers. Wapack Labs will continue to collect, research and analyze malicious cyber activities in the MENA region and provide periodic updates for our members.
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Seuls les employs qui grent votre compte auront accs vos informations personnelles et uniquement lorsqu'ils excutent des fonctions commerciales lorsque ces informations sont ncessaires. Nous avons utilis le logiciel MacAffee Security pour crypter vos informations tout en transmettant vos informations personnelles au sein de notre systme et aux autres utilisateurs ncessaires de ces informations. Ce logiciel utilise galement des pare-feu et des systmes de dtection d'intrusion pour empcher toute dfaillance de la scurit de ce site ou l'accs vos informations par des personnes non autorises.
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