Remcos is a remote access trojan – a malware used to take remote control over infected PCs. Home Packet Analysis 2018-02-17 Remcos RAT from malspam. The following, on the other hand, is the RC4 algorithm used to decrypt the above configuration: Figure 21. What's more, it is modernized with updates that are being released nearly every month by the owner company. Analysis: New Remcos RAT Arrives Via Phishing Email. The email appears as part of a chain, which makes it more likely for the target to open the attachment when it’s received. 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. 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%. Signatures report that the sample writes to the Startup directory. Figure 7. The program is able to remotely control PCs with any Windows OS including XP and newer. In several cases, the distribution servers associated with these campaigns have been observed hosting several other malicious binaries in addition to Remcos. Analysis of Remcos RAT Dropper. Crimson is a Remote Access Trojan — a malware that is used to take remote control of infected systems and steal data. This constantly updated information stealer malware should not be taken lightly, as it continues to be an active threat. However, it should be noted that this feature is not invoked in this sample. For example, they can remotely activate the camera to take pictures of a victim and send them to a control server. Herbie Zimmerman February 18, 2018 February 18, 2018 Packet Analysis. 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). Remcos RAT has been receiving substantial updates through its lifetime. Overview and Functionality The use of a multilayered solution such as Trend Micro™ Deep Discovery™ will help provide detection, in-depth analysis, and proactive response to today’s stealthy malware such as Remcos RAT, and targeted attacks in real-time. Out of the Trojans in the wild this is one of the most advanced thanks to the modular design and a complex delivery method. A RAT is a type of malware that allows outsiders to monitor and control your computer or network. Remcos was first seen in the wild at the 2 nd half of 2016 being promoted as a commercialized RAT at the price of $58 to $389. Remcos RAT execution can be watched in-depth in a video recorded in the ANY.RUN malware hunting service. This file then proceeds to download the main payload, which is Remcos itself, from a control server and then being the execution process. By: Aliakbar Zahravi The main goal of the Boom.exe file is to achieve persistence, perform 2. This file was the main payload and it carried out the main malicious activities - stealing information, changing the autorun value in the registry and connecting to the C2 server. In 2017, we reported spotting Remcos being delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199. Data is encrypted and sent to C&C server. The solution can also detect suspicious content in the message body and attachments as well as provide sandbox malware analysis and document exploit detection. 2020-07-10. submitted by /u/TorchedXorph Post Source. In 2017, we reported spotting Remcos being delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199. All rights reserved. The malware can be purchased with different cryptocurrencies. It can also capture screenshots and record keystrokes on infected machines. 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 … It achieves this by executing the following Shellcode (frenchy_shellcode version 1). Once the RAT is executed, a perpetrator gains the ability to run remote commands on the user’s system. AutoIt Binary to String decoding. Nowadays, it is common to say that the physical world and the cyber world are strictly connected. 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. It was one of the most popular RATs in the market in 2015. 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. 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. The following code snippet demonstrates this behavior: Figure 4. Corporations that are known to become targets of Remcos attacks include news agencies and businesses energy industry-related businesses. Security researchers discovered an attack campaign that abused fears surrounding the global coronavirus outbreak to deliver the Remcos RAT. REMCOS was developed by Italian malware developer Viotto and advertised as remote control and surveillance software and available for purchase on underground hacking forums. Clearly, the people behind Breaking Security have taken a lot of effort to stay anonymous. Remcos is a sophisticated remote access Trojan (RAT) that can be used to fully control and monitor any Windows computer from XP and onwards. 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. The proof is the leverage of the current physical threat, the CoronaVirus, as a social engineering trick to infect the cyber world. Remcos encrypted configuration. REMCOS is used as a remote access tool (RAT) that creates a backdoor into the victim's system. In fact, Breaking Security has released a video on its YouTube channel which demonstrates how multiple antiviruses fail to detect the presence of Remcos. Remcos (Remote Control and Surveillance) is a Remote Access Tool (RAT) that anyone can purchase and use for whatever purpose they wish. Today I’ve got a walk through of a Remcos RAT malware sample. Remcos is another RAT (Remote Administration Tool) that was first discovered being sold in hacking forums in the second half of 2016. Remcos is an extensive and powerful Remote Control tool, which can be used to fully administrate one or many computers, remotely. Hackers use it to control PCs of their victims remotely and steal information from infected PCs. The company responsible for selling Remcos RAT to the criminals is registered in Germany. 2018-02-17 Remcos RAT from malspam. Below is an analysis of a Word document that used macros to download a RAT known as Remcos. Figure 1: Displays the lifecycle of Remcos as presented by a visual graph generated by ANY.RUN. Remcos RAT is a surveillance tool that poses as legitimate software and has previously been observed being used in global hacking campaigns. ]com (with a legitimate domain) and the subject "RE: NEW ORDER 573923". Search for 'Startup' showing relevant file operations. Remcos is a robust RAT that can be used to monitor keystrokes, take remote screen captures, manage files, execute commands on infected systems and more. This Trojan is created and sold to clients by a “business” called Breaking Security. Remcos collecting system information, Figure 25. Figure 9. The following list shows some of the commands supported by the malware: The “consolecmd” command shown in the next figure, for instance, is used to execute shell commands on an infected system: Figure 28. In fact, this malware is being maintained extremely actively with new releases coming out almost every month. This particular RAT is known to be used by a Pakistani founded cybergang that targets Indian military objects to steal sensitive information. Link to analysis. It is an interesting piece of RAT (and the only one that is developed in a native language other than Netwire) and is heavily used by malware actors. 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. One such threat we've kept an eye on is Amadey, a bot of Russian origin, which was first seen in late 2018. Executing and decoding Frenchy Shellcode, Decoding and loading Remcos from resources. 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). The email includes the malicious attachment using the ACE compressed file format, Purchase order201900512.ace, which has the loader/wrapper Boom.exe. AZORult can steal banking information including passwords and credit card details as well as cryptocurrency. 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. In a past campaign, for instance, the tool was seen with a variety of capabilities, which includes downloading and executing commands, logging keys, logging screens, and capturing audio and video using the microphone and webcam. Browser/cookie-stealing feature. 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. Despite its accessibility, it comes equipped with enough robust features to allow attackers to set up their own effective botnets. 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. Ave Maria malware is a Remote Access Trojan that is also called WARZONE RAT. Since Remcos trojan creates log files without encryption analysts can take a look at it. Figure 19. 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 malware retrieves the configuration called “SETTING” from its resource section. 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. Clear text data collected by Remcos, where “|cmd|” is the delimiter, Figure 26. Figure 2: A customizable text report generated by ANY.RUN is a feature specifically developed to simplify the sharing of research results. 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. Remcos RAT. After deobfuscation, the AutoIt code can be seen containing large amounts of junk code meant to throw analysts off the track. Danabot is an advanced banking Trojan malware that was designed to steal financial information from victims. The shellcode is XORed wit… 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. Yoroi Security detected the attack campaign when its threat intelligence activities uncovered a suspicious artifact named “CoronaVirusSafetyMeasures_pdf.” The top layer of obfuscation is shown in the following: Figure 2. The RAT appears to still be actively pushed by cybercriminals. sXpIBdPeKzI9PC2p0SWMpUSM2NSxWzPyXTMLlbXmYa0R20xk, Internet Safety and Cybersecurity Education, Trend Micro™ Deep Discovery™ Email Inspector, SideWinder Uses South Asian Issues for Spear Phishing, Mobile Attacks, Defense in Depth, Layered Security in the Cloud, Download a file from specified URL and execute it on an infected system, Display a message box on an infected system, Ping an infected system (used for network check), Add, edit, rename, or delete registry values and keys, cf624ccc3313f2cb5a55d3a3d7358b4bd59aa8de7c447cdb47b70e954ffa069b, 1108ee1ba08b1d0f4031cda7e5f8ddffdc8883db758ca978a1806dae9aceffd1, 6cf0a7a74395ee41f35eab1cb9bb6a31f66af237dbe063e97537d949abdc2ae9. 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. Trend Micro™ Deep Discovery™ Email Inspector prevents malware from reaching end users. We take a more granular look at how this Trojan works from two levels – the malware itself and what it does to the computer via the logs. Upon execution, depending on the configuration, the malware creates a copy of itself in %AppData%\remcos\remcos.exe, uses install.bat to execute remcos.ex$ from the %APPDATA% directory, and finally deletes itself. Since then, it has been updated with more features, and just recently, we’ve seen its payload being distributed in the wild for the first time. Remcos RAT is a dangerous trojan available to attackers for a relatively inexpensive price. Popular TP-Link Family of Kasa Security Cams Vulnerable to Attack. Figure 17. This example clearly shows the mutexes checked/created during the execution of a Remcos RAT sample. 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. Who is behind Remcos? The attackers normally use phishing techniques to try and trick users into downloading file attachments, commonly – contaminated Microsoft Office files. Copyright © 2020 Trend Micro Incorporated. Remcos loads the encrypted settings from its resources. On July 21, both a free and paid version of the software was made available for download via the website. AutoIt decoding the main payload: Code + encoded resource (Remcos RAT), Figure 10. Analysing Remcos RAT’s executable Posted on March 2, 2018 Remcos is a native RAT sold on the forums HackForums.net. This malware is extremely actively caped up to date with updates coming out almost every single month. 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. If you don't know it, look at the "about" page of this website. Remcos RAT is a lightweight, fast and highly customizable Remote Administration Tool with a wide array of functionalities. Posted in:Malware. 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. 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. IT3(b) certificate_846392852289725282735792726639.exe, 9d996dec6ef44f2fa3dcb65e545a1a230c81f39c2a5aaee8adae63b673807639, f43a96ccf1d23d7dda1abbc2bea16ecbb2fb43b2f05e4015ff69c02e2c144ab2, 83f54b46a10ce36ac80d885c29cbf1c88c65250163961193916123c282d36784, 849c170a469dc6f5b1bc190923744b08c51ea0ea593e435f0121b874af58c3ec, b5734fe9e898335433674437790e741440b75c6a749ceb7455555c88303daedc, cc8de0f68549d84a62dcd11df6625b2bfe08a6cfaea102f4710e28969a60f689, 779e90a4e2175a90031afae55c8815daccffd005d3d5b81d3036e8024d23accf, a496629cacea32aa3bd55d5c7f5a8a8420aec2f64e548ae852c08568a37e96fd, 8512512035d970e77eca60b860768dace58c428599cd1c267b2668235f52845e, 0215f08f934f609d44d8b1b3e5be6e1c969c30c772b27e5acc768bb8406008d0, f7e29cbf47c9804eb341836873ea6837be7a46639978f44d9ba2670d47e68d56, 4fc7cddc76384dcf87d0a7ab3b0d8c94b39279147ba568c07e15ba80dd8a2f30, 52131fea6ab2b396871d39e37e0ecd2cb1f6072e3abe4d24793eb2cfb585cb6b, 3a6e0aff4a905b75ec12a28eaeef61306140018847f3a025b32520def2cfd0e8, ec8b81458b41156d644c3b5a9203662b932c6dd6940e5e37b113de14997a09c4, 7197916337bf345bb41a4b0c451ec7d6a0dd0461114b7376e01203bfc3334907, 864ef4a79ee785d1eb3061ae4d741df007b4f18c34fa98f09a5ee552574326fd, db2be633864e40fb6373053344179e3011de80431252752355f5dcbcb1bca648, b5e3215d397a66254a352134e9c0c9bcc1a685b4f3fb43eea058b54c30089566, a38c6f04ad56e8c855ec908221c3da09a2cf8507b345f7e67e480c62e257fd63, c1c1c4fe9815a67a9bcfa9ca855845efd19f0de896de8fb10011f06cf1678106. Section Two: Analysis - Sandbox . Users should also exercise caution before clicking on URLs to avoid being infected with malware. Recently, the RAT has made its way to phishing emails. Figure 24. AutoIt decoding the main payload: Code only. The content of the configuration is encrypted using the RC4 algorithm, as seen below: Figure 20. The domain name of the website itself is hosted on Cloudflare and all information related to it is protected by the privacy policy of the hoster organization. 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. 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. Despite its accessibility, it comes equipped with enough robust features to allow attackers to set up their own effective botnets. It creates folder remcos and PE file named remcos.exe in %APPDATA% directory, remcos uses Run key as persistence method, also creates file called install.bat in %TEMP% directory. in this video I will be reviewing Remcos RAT, the most advanced remote access tool on the market. AutoIt loader checks for a debugger. Reflected Remcos RAT change in the Registry. The RAT appears to still be actively pushed by cybercriminals. Author: Trend Micro. It has been operational since 2016 when it first became available for sale in the underground hacker communities on the dark web. The main goal of the Boom.exe file is to achieve persistence, perform anti-analysis detection, and drop/execute Remcos RAT on an affected system. Remote Administration Remcos proves useful in many usage scenarios, for instance: Control your personal computer from a remote location, such as from a different room, or even from the other side of the planet. It is falsely marketed as a legitimate software on the dedicated website where this malware is sold. Posted on:August 15, 2019 at 4:54 am. 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. The access tool is described as a … Some examples of Remcos RAT’s commands, Figure 29. In addition, Breaking Security provides attackers with a keylogger that can be used to remotely record keystrokes of the victim, a mass mailer program that can be used to carry out distribution campaigns and a DynDNS service. Although Breaking Security promises that the program is only available to those who intend to use it for legal purposes, in reality, Remcos RAT gives clients all necessary features to launch potentially destructive attacks. With all additional services connected, purchasers gain all they need to create their own functioning botnets. 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). Figure 3: Execution processes of Remcos as displayed by the ANY.RUN malware analysis service. The malware then prepares the environment to execute the main payload. The DecData() function loads the data from its resource then reverses all data and replaces “%$=” with “/”. Originally marketed as a remote access tool that legitimately lets a user control a system remotely, Remcos RAT has since been used by cybercriminals. This can be verified with a search on the Analysis Log View. Remcos RAT emerged in 2016 being peddled as a service in hacking forums — advertised, sold, and offered cracked on various sites and forums. If you see strings like on the illustration below you can be sure it Remcos. Remcos RAT emerged in 2016 being peddled as a service in hacking forums — advertised, sold, and offered cracked on various sites and forums. Remcos mutex example. Post navigation. It is a commercial Remote Access Trojan and usually goes from anywhere between $58 to $389. 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. RC4 algorithm to decrypt the configuration. reddit. Crimson is a Remote Access Trojan — a malware that is used to take remote control of infected systems and steal data. Remcos RAT interface An Italian malware developer by the name of Viotto has published his latest creation, the Remcos RAT (Remote Access Trojan), which he's selling on … 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. Accessibility and powerful feature set helped to make Ramcos into a powerful and dangerous trojan. Remcos is a RAT type malware which means that attackers use it to perform actions on infected machines remotely. 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. The ZIP file attachment contains a VB6 executable that stores an encrypted shellcode. For the analysis of this payload, we looked into the sample Remcos Professional version 1.7. Once downloaded, the files would prompt the users to activate macros which are required for the execution of Ramcos to start. Remcos RAT is a dangerous trojan available to attackers for a relatively inexpensive price. For enterprises, if an anomaly is suspected in the system, report the activity to the network administrator immediately. 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). The first stage in this campaign is an email that claims it’s a payment invoice. Functions used for deobfuscation. Hey guys! New German law would force ISPs to allow secret service to install trojans on user devices – … What's more, it is modernized with updates that are being released nearly every month by the owner company. Remcos RAT changes the Registry entry to maintain persistence, Figure 18. In past years, it had been observed to act as an information collector, keylogger on a victim’s device. Analysis of a RAT – Remcos. It was first used in spear phishing campaigns targeting Turkish organizations. So with emotet being quiet the plethora of unique malware continues. They were all from the same sender and all of them had the same maldoc attached to them. Remcos RAT Executive Summary Remcos RAT, or remote access tool, is a legitimate application intended for use by administrators for remote access and maintenance. 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. Figure 14. After that, all you need to do is just click on the logs.dat file. In some cases after decryption, the malware uses the AutoIt function called BinaryToString() to deobfuscate the next layer. If the loader detects IsdebuggerPresent in the system, it will display the message, “This is a third-party compiled AutoIt script.” and exits the program. It then creates the following Run key in the Registry to maintain persistence on the system. In our simulation, after Remcos made its way to infect the device and begin the execution process, it started VBS script execution. The malware encrypts the collected data using the RC4 algorithm with the password “pass” from the configuration data. Back to May 2018, we analyzed a variant of it, click here for more details. Earlier this morning I came across some emails that had a subject line that caught my attention. This is the case of the Greta Thunberg phenomenon exploited … Script run command line and proceeded to drop an executable file from it. This particular RAT is known to be used by a Pakistani founded cybergang that targets Indian military objects to steal sensitive information. From hybrid-analysis we get almost same information: install.bat pings C&C, executes remcos.exe from %APPDATA% directory, and removes itself: What’s more, it comes equipped with a cryptor program that enables the malware to stay hidden from antivirus software. It has recently been used as part of attempted cyberattacks, leveraging COVID-related phishing themes to disguise it as part of the payload. The malicious actor behind the phishing email appears to use the email address [email protected][. 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. However, this particular campaign delivers Remcos using an AutoIt wrapper, which incorporates different obfuscation and anti-debugging techniques to avoid detection. Agent Tesla is spyware that collects information about the actions of its victims by recording keystrokes and user interactions. Although being distributed using multiple methods, being provided in a bundle with mass mailer software, Remcos RAT usually gets into victims’ machines through malicious attachments in spam email campaigns. The current campaign utilizes social engineering technique wherein threat actors are leveraging what’s new and trending worldwide. August 15, 2019. The website itself does not provide any information about the company or about the team behind Remcos. Remcos trojan can be delivered in different forms. Figure 1: The email pretends to be a payment request. 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. As in all analysis … Cryptor program that enables the malware retrieves the configuration is encrypted and sent to C & C server is in. Most advanced remote access Trojan — a malware used to take remote control over infected PCs prompt the to... 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Click here for more details passwords and credit card details as well as cryptocurrency lot of to. 2018 Packet analysis: 2017-10-27-Remcos-RAT-malspam-and-artifacts.zip 621 kB ( 620,621 bytes ) ZIP archives are password-protected the. Actions on infected machines recording keystrokes and user interactions encrypts the collected data using RC4... Sharing of research results lightly, as a legitimate domain ) and the subject `` RE: ORDER. ” from its resource section that attackers use it to perform actions infected! To stay hidden from antivirus software remotely activate the camera to take remote control over infected PCs in 2017 we... Shown in the message body remcos rat analysis attachments as well as provide sandbox malware analysis and document exploit.. Encrypts the collected data using the RC4 algorithm with the password “ pass ” from the same maldoc attached remcos rat analysis. Physical threat, the distribution servers associated with these campaigns have been observed to as... Activate macros which are required for the analysis of this website 4:54 am has recently been as! Rat sold on the dark web following, on the user ’ s remcos rat analysis trending! Stores an encrypted shellcode has made its way to infect the device begin... Creates the following run key in the system, report the activity to the design! 2018 Packet analysis delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199 “ SETTING ” the...