For a more comprehensive security suite, organizations can consider the Trend Micro™ Cloud App Security™ solution, which employs machine learning (ML) in web reputation and URL dynamic analysis. Analysis: New Remcos RAT Arrives Via Phishing Email, Update applications and systems regularly, Apply whitelisting, block unused ports, and disable unused components, Monitor traffic in the system for any suspicious behavior. Figure 3: Execution processes of Remcos as displayed by the ANY.RUN malware analysis service. Remcos is a remote access trojan – a malware used to take remote control over infected PCs. Accessibility and powerful feature set helped to make Ramcos into a powerful and dangerous trojan. A RAT is a type of malware that allows outsiders to monitor and control your computer or network. AutoIt Binary to String decoding. The program is able to remotely control PCs with any Windows OS including XP and newer. Even though the location can vary from sample to sample, it usually includes one of the following locations, typical for malware creators: %APPDATA% and %TEMP%. If you see strings like on the illustration below you can be sure it Remcos. Signatures report that the sample writes to the Startup directory. It provides a comprehensive defense tailored to protect organizations against targeted attacks and advanced threats through specialized engines, custom sandboxing, and seamless correlation across the entire attack lifecycle. Security researchers discovered an attack campaign that abused fears surrounding the global coronavirus outbreak to deliver the Remcos RAT. A Remote Access tool that tends to be marketed to perform malicious activity over any legitimate usage, with many advanced evasion capabilities not remotely necessary for legitimate remote access work.. Like most malware today the obvious … Section Two: Analysis - Sandbox . Once the RAT is executed, a perpetrator gains the ability to run remote commands on the user’s system. Herbie Zimmerman February 18, 2018 February 18, 2018 Packet Analysis. Remcos mutex example. Out of the Trojans in the wild this is one of the most advanced thanks to the modular design and a complex delivery method. Figure 2: A customizable text report generated by ANY.RUN is a feature specifically developed to simplify the sharing of research results. Yoroi Security detected the attack campaign when its threat intelligence activities uncovered a suspicious artifact named “CoronaVirusSafetyMeasures_pdf.” Then it uses the following to decode the base64 PE file, which is the main payload: This AutoIt loader is capable of detecting a virtual machine environment by checking vmtoolsd.exe and vbox.exe in the list of running processes. The malware then creates a copy of itself in %AppData%\Roaming\appidapi\UevTemplateBaselineGenerator.exe and loads the main payload (Remcos RAT) from its resource section. Link to analysis. In several cases, the distribution servers associated with these campaigns have been observed hosting several other malicious binaries in addition to Remcos. The current campaign utilizes social engineering technique wherein threat actors are leveraging what’s new and trending worldwide. RC4 algorithm to decrypt the configuration. The top layer of obfuscation is shown in the following: Figure 2. This constantly updated information stealer malware should not be taken lightly, as it continues to be an active threat. Originally marketed as a remote access tool that legitimately lets a user control a system remotely, Remcos RAT has since been used by cybercriminals. Search for 'Startup' showing relevant file operations. Below is an analysis of a Word document that used macros to download a RAT known as Remcos. in this video I will be reviewing Remcos RAT, the most advanced remote access tool on the market. The DecData() function loads the data from its resource then reverses all data and replaces “%$=” with “/”. The tool itself is is presented as legitimate, however, although Remcos's developers strictly forbid misuse, some cyber criminals use this tool to generate revenue by various malicious means. It is not new for cyber-crooks to exploit social phenomena to spread malware in order to maximize the impact and dissemination of a malicious campaign. Corporations that are known to become targets of Remcos attacks include news agencies and businesses energy industry-related businesses. Analysis: New Remcos RAT Arrives Via Phishing Email Posted on August 15, 2019 August 21, 2019 Author Cyber Security Review In July, we came across a phishing email purporting to be a new order notification, which contains a malicious attachment that leads to the remote access tool Remcos RAT (detected by Trend Micro as BKDR_SOCMER.SM). Analysing Remcos RAT’s executable Posted on March 2, 2018 Remcos is a native RAT sold on the forums HackForums.net. As in all analysis … Depending on the Windows version, the malware uses either the built-in Event Viewer utility (eventvwr) or fodhelper to bypass the User Account Control (UAC). This attack delivers Remcos using an AutoIt wrapper that incorporates various obfuscation and anti-debugging techniques to evade detection, which is a common method for distributing known malware. Remcos RAT is a dangerous trojan available to attackers for a relatively inexpensive price. Author: Trend Micro. Clear text data collected by Remcos, where “|cmd|” is the delimiter, Figure 26. AutoIt loader checks for a debugger. The ZIP file attachment contains a VB6 executable that stores an encrypted shellcode. Nowadays, it is common to say that the physical world and the cyber world are strictly connected. This example clearly shows the mutexes checked/created during the execution of a Remcos RAT sample. After analyzing this Remcos variant — its configuration data, communication mechanism, and functionalities — we saw that it had many similarities with its older variant (detected as Backdoor.Win32.Remcosrat.A). This file then proceeds to download the main payload, which is Remcos itself, from a control server and then being the execution process. Reflected Remcos RAT change in the Registry. This particular RAT is known to be used by a Pakistani founded cybergang that targets Indian military objects to steal sensitive information. It is falsely marketed as a legitimate software on the dedicated website where this malware is sold. Since Remcos trojan creates log files without encryption analysts can take a look at it. In 2017, we reported spotting Remcos being delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199. However, it should be noted that this feature is not invoked in this sample. Figure 9. What's more, it is modernized with updates that are being released nearly every month by the owner company. Remcos collecting system information, Figure 25. Remcos RAT has been receiving substantial updates through its lifetime. Popular TP-Link Family of Kasa Security Cams Vulnerable to Attack. Some examples of Remcos RAT’s commands, Figure 29. After converting the executable to AutoIt script, we found that the malicious code was obfuscated with multiple layers, possibly to evade detection and make it difficult for researchers to reverse. Remcos RAT emerged in 2016 being peddled as a service in hacking forums — advertised, sold, and offered cracked on various sites and forums. We found another adware family that not only displays advertisements that are difficult to close, it employs unique techniques to evade detection through user behavior and time-based triggers. For instance, it can be spread as an executable file with the name that should convince users to open it or it pretends to be a Microsoft Word file that exploits vulnerabilities to download and execute the main payload. The shellcode is XORed wit… What’s more, it comes equipped with a cryptor program that enables the malware to stay hidden from antivirus software. The proof is the leverage of the current physical threat, the CoronaVirus, as a social engineering trick to infect the cyber world. The access tool is described as a … Screenshot of Remcos (Rescoms) admin panel used to control the RAT: Process of the installed Remote Access Tool running in Task Manager as "REMCOS RAT 2.exe": Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Analysis: New Remcos RAT Arrives Via Phishing Email. We also recommend these best practices for added protection: Implementing security solutions with anti-spam filtering should weed out spam messages such as the one discussed here. REMCOS is used as a remote access tool (RAT) that creates a backdoor into the victim's system. Despite its accessibility, it comes equipped with enough robust features to allow attackers to set up their own effective botnets. Adwind RAT, sometimes also called Unrecom, Sockrat, Frutas, jRat and JSocket is a Malware As A Service Remote Access Trojan that attackers can use to collect information from infected machines. Thankfully, malware hunting services such as ANY.RUN gives professionals an equally robust feature set to research threats like Ramcos and respond with effective countermeasures. Remcos (Remote Control and Surveillance) is a Remote Access Tool (RAT) that anyone can purchase and use for whatever purpose they wish. It is a commercial Remote Access Trojan and usually goes from anywhere between $58 to $389. Once downloaded, the files would prompt the users to activate macros which are required for the execution of Ramcos to start. Remcos RAT. For example, they can remotely activate the camera to take pictures of a victim and send them to a control server. In 2017, we reported spotting Remcos being delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199. 2. After deobfuscation, the AutoIt code can be seen containing large amounts of junk code meant to throw analysts off the track. Clearly, the people behind Breaking Security have taken a lot of effort to stay anonymous. Zip archive of the malware: 2017-10-27-Remcos-RAT-malspam-and-artifacts.zip 621 kB (620,621 bytes) Zip archives are password-protected with the standard password. Remcos is an extensive and powerful Remote Control tool, which can be used to fully administrate one or many computers, remotely. The following code snippet demonstrates this behavior: Figure 4. Data is encrypted and sent to C&C server. Remcos is a sophisticated remote access Trojan (RAT) that can be used to fully control and monitor any Windows computer from XP and onwards. Users should also exercise caution before clicking on URLs to avoid being infected with malware. The above snippet code first calculates the value inside the array and then uses the ChrW() function to convert the Unicode number to the character. For enterprises, if an anomaly is suspected in the system, report the activity to the network administrator immediately. The malware can be purchased with different cryptocurrencies. The email includes the malicious attachment using the ACE compressed file format, Purchase order201900512.ace, which has the loader/wrapper Boom.exe. Danabot is an advanced banking Trojan malware that was designed to steal financial information from victims. From hybrid-analysis we get almost same information: install.bat pings C&C, executes remcos.exe from %APPDATA% directory, and removes itself: Figure 1: The email pretends to be a payment request. It was one of the most popular RATs in the market in 2015. It achieves this by executing the following Shellcode (frenchy_shellcode version 1). Today I’ve got a walk through of a Remcos RAT malware sample. In April 2019 the malware was available for purchase for as little as just over 60 dollars up to over 400 dollars depending on the selected package. Figure 1: Displays the lifecycle of Remcos as presented by a visual graph generated by ANY.RUN. If the victim does enable the macros, they reconstruct a small executable file which is then dropped to a pre-specified location and launched from there. Germany is the only country out of all European Union members which do not allow to look up company details online, therefore founders of Breaking Security are still not identified. Trend Micro™ Deep Discovery™ Email Inspector prevents malware from reaching end users. Remcos trojan can be delivered in different forms. The malware then creates the following mutex to mark its presence on the system: It then starts to collect system information such as username, computer name, Windows version, etc., which it sends to the command and control (C&C) server. This Trojan is created and sold to clients by a “business” called Breaking Security. Agent Tesla is spyware that collects information about the actions of its victims by recording keystrokes and user interactions. This email contains a ZIP file attachment; as with other phishing emails, the goal is to get the target to download the attachment and open the file. The solution can also detect suspicious content in the message body and attachments as well as provide sandbox malware analysis and document exploit detection. In some cases after decryption, the malware uses the AutoIt function called BinaryToString() to deobfuscate the next layer. To defend against threats like Remcos RAT that use email-based attacks, we advise users to refrain from opening unsolicited emails — especially those with attachments — from unknown sources. Analysis of Remcos RAT Dropper. Attackers who utilize this Trojan are known to target specific organizations and sometimes go a long way to craft custom phishing emails designed to fool their victims. Figure 24. Open either "Files" tab in the lower part of the task's window or click on the process and then on the button "More Info" in the appeared window. Post navigation. The website itself does not provide any information about the company or about the team behind Remcos. ]com (with a legitimate domain) and the subject "RE: NEW ORDER 573923". In fact, Breaking Security has released a video on its YouTube channel which demonstrates how multiple antiviruses fail to detect the presence of Remcos. August 15, 2019. Hey guys! Remcos RAT execution can be watched in-depth in a video recorded in the ANY.RUN malware hunting service. The RAT appears to still be actively pushed by cybercriminals. Remcos RAT Ionut Ilascu The topics he writes about include malware, vulnerabilities, exploits and security defenses, as well as research and innovation in information security. Latest Version of Amadey Introduces Screen Capturing and Pushes the Remcos RAT The Zscaler ThreatLabZ team is continually monitoring known threats to see if they re-appear in a different form. reddit. 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