The proof is the leverage of the current physical threat, the CoronaVirus, as a social engineering trick to infect the cyber world. 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. Reflected Remcos RAT change in the Registry. So with emotet being quiet the plethora of unique malware continues. 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 … It is a commercial Remote Access Trojan and usually goes from anywhere between $58 to $389. This particular RAT is known to be used by a Pakistani founded cybergang that targets Indian military objects to steal sensitive information. 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). Back to May 2018, we analyzed a variant of it, click here for more details. Executing and decoding Frenchy Shellcode, Decoding and loading Remcos from resources. AutoIt decoding the main payload: Code + encoded resource (Remcos RAT), Figure 10. What’s more, it comes equipped with a cryptor program that enables the malware to stay hidden from antivirus software. Figure 1: Displays the lifecycle of Remcos as presented by a visual graph generated by ANY.RUN. in this video I will be reviewing Remcos RAT, the most advanced remote access tool on the market. Remcos collecting system information, Figure 25. It was one of the most popular RATs in the market in 2015. Figure 3: Execution processes of Remcos as displayed by the ANY.RUN malware analysis service. Figure 17. Once the RAT is executed, a perpetrator gains the ability to run remote commands on the user’s system. Nowadays, it is common to say that the physical world and the cyber world are strictly connected. It achieves this by executing the following Shellcode (frenchy_shellcode version 1). Some examples of Remcos RAT’s commands, Figure 29. Link to analysis. Security researchers discovered an attack campaign that abused fears surrounding the global coronavirus outbreak to deliver the Remcos RAT. ]com (with a legitimate domain) and the subject "RE: NEW ORDER 573923". Once downloaded, the files would prompt the users to activate macros which are required for the execution of Ramcos to start. Herbie Zimmerman February 18, 2018 February 18, 2018 Packet Analysis. Overview and Functionality For example, they can remotely activate the camera to take pictures of a victim and send them to a control server. For enterprises, if an anomaly is suspected in the system, report the activity to the network administrator immediately. A RAT is a type of malware that allows outsiders to monitor and control your computer or network. 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. 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 (Remote Control and Surveillance) is a Remote Access Tool (RAT) that anyone can purchase and use for whatever purpose they wish. 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. Remcos RAT Executive Summary Remcos RAT, or remote access tool, is a legitimate application intended for use by administrators for remote access and maintenance. 2018-02-17 Remcos RAT from malspam. Analysing Remcos RAT’s executable Posted on March 2, 2018 Remcos is a native RAT sold on the forums HackForums.net. The attackers normally use phishing techniques to try and trick users into downloading file attachments, commonly – contaminated Microsoft Office files. The program is able to remotely control PCs with any Windows OS including XP and newer. The ZIP file attachment contains a VB6 executable that stores an encrypted shellcode. Danabot is an advanced banking Trojan malware that was designed to steal financial information from victims. Home Packet Analysis 2018-02-17 Remcos RAT from malspam. Figure 2: A customizable text report generated by ANY.RUN is a feature specifically developed to simplify the sharing of research results. However, this particular campaign delivers Remcos using an AutoIt wrapper, which incorporates different obfuscation and anti-debugging techniques to avoid detection. Search for 'Startup' showing relevant file operations. 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. 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%. 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. 2020-07-10. submitted by /u/TorchedXorph Post Source. AutoIt decoding the main payload: Code only. Trend Micro™ Deep Discovery™ Email Inspector prevents malware from reaching end users. 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. In some cases after decryption, the malware uses the AutoIt function called BinaryToString() to deobfuscate the next layer. 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. Remcos RAT is a dangerous trojan available to attackers for a relatively inexpensive price. 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. 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. 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. 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. All rights reserved. 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. Figure 24. August 15, 2019. Browser/cookie-stealing feature. Users should also exercise caution before clicking on URLs to avoid being infected with malware. Below is an analysis of a Word document that used macros to download a RAT known as Remcos. 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. Originally marketed as a remote access tool that legitimately lets a user control a system remotely, Remcos RAT has since been used by cybercriminals. reddit. 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. Agent Tesla is spyware that collects information about the actions of its victims by recording keystrokes and user interactions. 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. Remcos RAT is a dangerous trojan available to attackers for a relatively inexpensive price. New German law would force ISPs to allow secret service to install trojans on user devices – … Hey guys! 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. 2. Out of the Trojans in the wild this is one of the most advanced thanks to the modular design and a complex delivery method. In fact, this malware is being maintained extremely actively with new releases coming out almost every month. Post navigation. Remcos RAT is a lightweight, fast and highly customizable Remote Administration Tool with a wide array of functionalities. Earlier this morning I came across some emails that had a subject line that caught my attention. The malware retrieves the configuration called “SETTING” from its resource section. The content of the configuration is encrypted using the RC4 algorithm, as seen below: Figure 20. 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. In past years, it had been observed to act as an information collector, keylogger on a victim’s device. Figure 14. Remcos RAT execution can be watched in-depth in a video recorded in the ANY.RUN malware hunting service. Signatures report that the sample writes to the Startup directory. 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). The RAT appears to still be actively pushed by cybercriminals. The access tool is described as a … 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. Remcos RAT is a surveillance tool that poses as legitimate software and has previously been observed being used in global hacking campaigns. This constantly updated information stealer malware should not be taken lightly, as it continues to be an active threat. 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. 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. Data is encrypted and sent to C&C server. 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. AutoIt loader checks for a debugger. The malware can be purchased with different cryptocurrencies. 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. Recently, the RAT has made its way to phishing emails. Remcos is a remote access trojan – a malware used to take remote control over infected PCs. Remcos mutex example. In 2017, we reported spotting Remcos being delivered via a malicious PowerPoint slideshow, embedded with an exploit for CVE-2017-0199. 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. Who is behind Remcos? The first stage in this campaign is an email that claims it’s a payment invoice. Remcos RAT has been receiving substantial updates through its lifetime. The malware then prepares the environment to execute the main payload. The solution can also detect suspicious content in the message body and attachments as well as provide sandbox malware analysis and document exploit detection. Today I’ve got a walk through of a Remcos RAT malware sample. Hackers use it to control PCs of their victims remotely and steal information from infected PCs. From hybrid-analysis we get almost same information: install.bat pings C&C, executes remcos.exe from %APPDATA% directory, and removes itself: REMCOS was developed by Italian malware developer Viotto and advertised as remote control and surveillance software and available for purchase on underground hacking forums. If you see strings like on the illustration below you can be sure it Remcos. Copyright © 2020 Trend Micro Incorporated. Since Remcos trojan creates log files without encryption analysts can take a look at it. What's more, it is modernized with updates that are being released nearly every month by the owner company. 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