Cyble Research & Intelligence Labs (CRIL) have been monitoring several instances where well-known applications and tools have been exploited as a delivery mechanism for malicious files. Threat Actors (TAs) leverage the trust associated with these applications to deceive users into downloading and executing them.…
August 8, 2023 update: Microsoft released security updates to address CVE-2023-36884. Customers are advised to apply patches, which supersede the mitigations listed in this blog, as soon as possible.
Microsoft has identified a phishing campaign conducted by the threat actor tracked as Storm-0978 targeting defense and government entities in Europe and North America.…
In this entry, we discuss the findings of our investigation into a piece of a signed rootkit, whose main binary functions as a universal loader that enables attackers to directly load a second-stage unsigned kernel module.
In one of our recent threat hunting investigations, we came across an interesting new threat activity cluster that we initially thought was a false positive detection for a Microsoft signed file.…
We found that malicious actors used malvertising to distribute malware via cloned webpages of legitimate organizations. The distribution involved a webpage of the well-known application WinSCP, an open-source Windows application for file transfer. We were able to identify that this activity led to a BlackCat (aka ALPHV) infection, and actors also used SpyBoy, a terminator that tampers with protection provided by agents.…
Aqua Nautilus researchers identified an infrastructure of a potentially massive campaign against cloud native environments. This infrastructure is in early stages of testing and deployment, and is mainly consistent of an aggressive cloud worm, designed to deploy on exposed JupyterLab and Docker APIs in order to deploy Tsunami malware, cloud credentials hijack, resource hijack and further infestation of the worm.…
Volexity works with many individuals and organizations often subjected to sophisticated and highly targeted spear-phishing campaigns from a variety of nation-state-level threat actors. In the last few years, Volexity has observed threat actors dramatically increase the level of effort they put into compromising credentials or systems of individual targets.…
In the realm of cybersecurity, malicious programs continuously evolve to exploit the vulnerabilities of unsuspecting victims. One particularly notorious threat that has gained popularity is the Clipper malware. This Clipper malware specifically targets cryptocurrency users, aiming to deceive and defraud them of their valuable digital assets.…
MuddyWater, also known as Mango Sandstorm (Mercury), is a cyber espionage group that is a subordinate element within the Iranian Ministry of Intelligence and Security (MOIS).
Executive summary: Deep Instinct’s Threat Research team has identified a new C2 (command & control) framework The C2 framework is custom made, continuously in development, and has been used by the MuddyWater group since at least 2021 The framework is named PhonyC2 and was used in the attack on the Technion Institute PhonyC2 is currently used in an active PaperCut exploitation campaign by MuddyWater PhonyC2 is similar to MuddyC3, a previous C2 framework created by MuddyWaterMuddyWater is continuously updating the PhonyC2 framework and changing TTPs to avoid detection, as can be seen throughout the blog and in the investigation of the leaked code of PhonyC2.…
Summary
SALTWATER is a backdoor that has been used in the exploitation of the Barracuda 0-day vulnerability CVE-2023-2868. It is a module for the Barracuda SMTP daemon called bsmtpd. The malware hooked the recv, send, and close functions using an open-source hooking library called funchook. The following functionalities are implemented: execute arbitrary commands, download and upload files, proxy functionality, and tunneling functionality.…
Cryptojacking, the illicit use of computing resources to mine cryptocurrency, has become increasingly prevalent in recent years, with attackers building a cybercriminal economy around attack tools, infrastructure, and services to generate revenue from targeting a wide range of vulnerable systems, including Internet of Things (IoT) devices.…
RedEyes (also known as APT37, ScarCruft, and Reaper) is a state-sponsored APT group that mainly carries out attacks against individuals such as North Korean defectors, human rights activists, and university professors. Their task is known to be monitoring the lives of specific individuals. In May 2023, AhnLab Security Emergency response Center (ASEC) discovered the RedEyes group distributing and using an Infostealer with wiretapping features that was previously unknown along with a backdoor developed using GoLang that exploits the Ably platform.* ABLY…
Affected platforms: LinuxImpacted parties: Any organizationImpact: Remote attackers gain control of the vulnerable systemsSeverity level: Critical
FortiGuard Labs encountered recent samples of a DDoS-as-a-service botnet calling itself Condi. It attempted to spread by exploiting TP-Link Archer AX21 (AX1800) routers vulnerable to CVE-2023-1389, which was disclosed in mid-March of this year.…
By Securonix Threat Labs, Threat Research: D. Iuzvyk, T. Peck, O. Kolesnikov
June 21, 2023
TL;DRMULTI#STORM, an interesting attack campaign involving Python-based loader malware was recently seen being used to deliver Warzone RAT infections using phishing emails.
An interesting phishing campaign was recently analyzed by the Securonix Threat Research Team.…
At the beginning of this year, we released a detailed publication on Vidar infrastructure, encompassing both the primary administrative aspects, and the underlying backend. In that publication, we highlighted three key insights:
Russian VPN gateways had the potential to confer anonymity to Vidar operators and customers, thereby rendering it more arduous for analysts to attain a comprehensive understanding of the threat.…
On May 23, 2023, Barracuda announced that a zero-day vulnerability (CVE-2023-2868) in the Barracuda Email Security Gateway (ESG) had been exploited in-the-wild as early as October 2022 and that they engaged Mandiant to assist in the investigation. Through the investigation, Mandiant identified a suspected China-nexus actor, currently tracked as UNC4841, targeting a subset of Barracuda ESG appliances to utilize as a vector for espionage, spanning a multitude of regions and sectors.…
This blog entry discusses the more technical details on the most recent tools, techniques, and procedures (TTPs) leveraged by the Earth Preta APT group, and tackles how we were able to correlate different indicators connected to this threat actor.
IntroductionIn November 2022, we disclosed a large-scale phishing campaign initiated by the advanced persistent threat (APT) group Earth Preta, also known as Mustang Panda.…
Threat Actors (TAs) commonly employ fake phishing websites as their preferred method for distributing malware. This is due to the ease of luring victims into clicking on links contained in phishing emails or sms. TAs often use brand impersonation in their phishing campaigns to deceive users effectively, creating an illusion of trustworthiness and legitimacy to trick unsuspecting individuals.…
A month ago, Google released eight new top level domains (TLD). Two of them (.zip and .mov) have been a cause for concern because they are similar to well known file extensions. Both .zip and .mov TLD are not new, as they have been available since 2014.…
In this intrusion, dated May 2023, we observed Truebot being used to deploy Cobalt Strike and FlawedGrace (aka GraceWire & BARBWIRE) resulting in the exfiltration of data and the deployment of the MBR Killer wiper. The threat actors deployed the wiper within 29 hours of initial access.…