Software

Raindrop is a loader used by APT29 that was discovered on some victim machines during investigations related to the SolarWinds Compromise. It was discovered in January 2021 and was likely used since at least May 2020.[1][2]

RainyDay is a backdoor tool that has been used by Naikon since at least 2020.[1]

Ramsay is an information stealing malware framework designed to collect and exfiltrate sensitive documents, including from air-gapped systems. Researchers have identified overlaps between Ramsay and the Darkhotel-associated Retro malware.[1][2]

RansomHub is a ransomware-as-a-service (RaaS) offering with Windows, ESXi, Linux, and FreeBSD versions that has been in use since at least 2024 to target organizations in multiple sectors globally. RansomHub operators may have purchased and rebranded resources from Knight (formerly Cyclops) Ransomware which shares infrastructure, feature, and code overlaps with RansomHub.[1][2]

Raspberry Robin is initial access malware first identified in September 2021, and active through early 2024. The malware is notable for spreading via infected USB devices containing a malicious LNK object that, on execution, retrieves remote hosted payloads for installation. Raspberry Robin has been widely used against various industries and geographies, and as a precursor to information stealer, ransomware, and other payloads such as SocGholish, Cobalt Strike, IcedID, and Bumblebee.[1][2][3] The DLL componenet in the Raspberry Robin infection chain is also referred to as "Roshtyak."[4] The name "Raspberry Robin" is used to refer to both the malware as well as the threat actor associated with its use, although the Raspberry Robin operators are also tracked as Storm-0856 by some vendors.[5]

RatMilad is an Android remote access tool (RAT) with spyware functionality that has been used to target enterprise mobile devices in the Middle East since at least 2021. Variants of RatMilad have been disguised as VPN applications and a fake app named NumRent. Upon installation, RatMilad employs multiple Collection techniques to collect sensitive information before uploading the collected data to its command and control (C2) server. [1]

RawDisk is a legitimate commercial driver from the EldoS Corporation that is used for interacting with files, disks, and partitions. The driver allows for direct modification of data on a local computer's hard drive. In some cases, the tool can enact these raw disk modifications from user-mode processes, circumventing Windows operating system security features.[1][2]

RawPOS is a point-of-sale (POS) malware family that searches for cardholder data on victims. It has been in use since at least 2008. [1] [2] [3] FireEye divides RawPOS into three components: FIENDCRY, DUEBREW, and DRIFTWOOD. [4] [5]

Rclone is a command line program for syncing files with cloud storage services such as Dropbox, Google Drive, Amazon S3, and MEGA. Rclone has been used in a number of ransomware campaigns, including those associated with the Conti and DarkSide Ransomware-as-a-Service operations.[1][2][3][4][5]

Reaver is a malware family that has been in the wild since at least late 2016. Reporting indicates victims have primarily been associated with the "Five Poisons," which are movements the Chinese government considers dangerous. The type of malware is rare due to its final payload being in the form of Control Panel items.[1]

Red Alert 2.0 is a banking trojan that masquerades as a VPN client.[1]

RedDrop is an Android malware family that exfiltrates sensitive data from devices. [1]

RedLeaves is a malware family used by menuPass. The code overlaps with PlugX and may be based upon the open source tool Trochilus. [1] [2]

RedLine Stealer is an information-stealer malware variant first identified in 2020.[1][2][3] RedLine Stealer is a Malware as a Service (MaaS) and was reportedly sold as either a one-time purchase or a monthly subscription service.[1][4] Information obtained from RedLine Stealer has been known to be sold on the deep and dark web to Initial Access Brokers (IABs), who use or resell the stolen credentials for further intrusions.[5][4]

Reg is a Windows utility used to interact with the Windows Registry. It can be used at the command-line interface to query, add, modify, and remove information. [1]

Utilities such as Reg are known to be used by persistent threats. [2]

RegDuke is a first stage implant written in .NET and used by APT29 since at least 2017. RegDuke has been used to control a compromised machine when control of other implants on the machine was lost.[1]

Regin is a malware platform that has targeted victims in a range of industries, including telecom, government, and financial institutions. Some Regin timestamps date back to 2003. [1]

Remcos is a closed-source tool that is marketed as a remote control and surveillance software by a company called Breaking Security. Remcos has been observed being used in malware campaigns.[1][2]

Remexi is a Windows-based Trojan that was developed in the C programming language.[1]

RemoteCMD is a custom tool used by APT3 to execute commands on a remote system similar to SysInternal's PSEXEC functionality. [1]

RemoteUtilities is a legitimate remote administration tool that has been used by MuddyWater since at least 2021 for execution on target machines.[1]

Remsec is a modular backdoor that has been used by Strider and appears to have been designed primarily for espionage purposes. Many of its modules are written in Lua. [1]

Responder is an open source tool used for LLMNR, NBT-NS and MDNS poisoning, with built-in HTTP/SMB/MSSQL/FTP/LDAP rogue authentication server supporting NTLMv1/NTLMv2/LMv2, Extended Security NTLMSSP and Basic HTTP authentication. [1]

Revenge RAT is a freely available remote access tool written in .NET (C#).[1][2]

Rifdoor is a remote access trojan (RAT) that shares numerous code similarities with HotCroissant.[1]