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Experts Expose Farnetwork's Ransomware-as-a-Service Business Model

Experts Expose Farnetwork's Ransomware-as-a-Service Business Model

Nov 08, 2023 Cyber Threat / Endpoint Security
Cybersecurity researchers have unmasked a prolific threat actor known as farnetwork, who has been linked to five different ransomware-as-a-service (RaaS) programs over the past four years in various capacities. Singapore-headquartered Group-IB, which attempted to infiltrate a private RaaS program that uses the  Nokoyawa   ransomware  strain, said it underwent a "job interview" process with the threat actor, learning several valuable insights into their background and role within those RaaS programs. "Throughout the threat actor's cybercriminal career, which began in 2019, farnetwork has been involved in several connected ransomware projects, including JSWORM, Nefilim, Karma, and Nemty, as part of which they helped develop ransomware and manage the RaaS programs before launching their own RaaS program based on Nokoyawa ransomware," Nikolay Kichatov, threat intelligence analyst at Group-IB,  said . The latest disclosure comes nearly six months after the cyber
New Jupyter Infostealer Version Emerges with Sophisticated Stealth Tactics

New Jupyter Infostealer Version Emerges with Sophisticated Stealth Tactics

Nov 06, 2023 Data Security / Malvertising
An updated version of an information stealer malware known as  Jupyter  has resurfaced with "simple yet impactful changes" that aim to stealthily establish a persistent foothold on compromised systems. "The team has discovered new waves of Jupyter Infostealer attacks which leverage PowerShell command modifications and signatures of private keys in attempts to pass off the malware as a legitimately signed file," VMware Carbon Black researchers  said  in a report shared with The Hacker News. Jupyter Infostealer , also known as Polazert , SolarMarker, and Yellow Cockatoo, has a  track record  of leveraging manipulated search engine optimization (SEO) tactics and malvertising as an initial access vector to trick users searching for popular software into downloading it from dubious websites. It comes with capabilities to harvest credentials as well as establish encrypted command-and-control (C2) communication to exfiltrate data and execute arbitrary commands. The la
AI Copilot: Launching Innovation Rockets, But Beware of the Darkness Ahead

AI Copilot: Launching Innovation Rockets, But Beware of the Darkness Ahead

Apr 15, 2024Secure Coding / Artificial Intelligence
Imagine a world where the software that powers your favorite apps, secures your online transactions, and keeps your digital life could be outsmarted and taken over by a cleverly disguised piece of code. This isn't a plot from the latest cyber-thriller; it's actually been a reality for years now. How this will change – in a positive or negative direction – as artificial intelligence (AI) takes on a larger role in software development is one of the big uncertainties related to this brave new world. In an era where AI promises to revolutionize how we live and work, the conversation about its security implications cannot be sidelined. As we increasingly rely on AI for tasks ranging from mundane to mission-critical, the question is no longer just, "Can AI  boost cybersecurity ?" (sure!), but also "Can AI  be hacked? " (yes!), "Can one use AI  to hack? " (of course!), and "Will AI  produce secure software ?" (well…). This thought leadership article is about the latter. Cydrill  (a
Mysterious Kill Switch Disrupts Mozi IoT Botnet Operations

Mysterious Kill Switch Disrupts Mozi IoT Botnet Operations

Nov 02, 2023 Malware / Botnet
The unexpected drop in malicious activity connected with the Mozi botnet in August 2023 was due to a kill switch that was distributed to the bots. "First, the drop manifested in India on August 8," ESET  said  in an analysis published this week. "A week later, on August 16, the same thing happened in China. While the mysterious control payload – aka kill switch – stripped Mozi bots of most functionality, they maintained persistence." Mozi is an Internet of Things (IoT) botnet that  emerged  from the source code of several known malware families, such as Gafgyt, Mirai, and IoT Reaper. First spotted in 2019, it's known to exploit weak and default remote access passwords as well as unpatched security vulnerabilities for initial access. In September 2021, researchers from cybersecurity firm Netlab  disclosed  the arrest of the botnet operators by Chinese authorities. But the  precipitous decline  in Mozi activity – from around 13,300 hosts on August 7 to 3,500
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Today's Top 4 Identity Threat Exposures: Where To Find Them and How To Stop Them

websiteSilverfortIdentity Protection / Attack Surface
Explore the first ever threat report 100% focused on the prevalence of identity security gaps you may not be aware of.
DDoS 2.0: IoT Sparks New DDoS Alert

DDoS 2.0: IoT Sparks New DDoS Alert

Sep 15, 2023 IoT Security / Cyber Threat
The  Internet of Things (IoT)  is transforming efficiency in various sectors like healthcare and logistics but has also introduced new security risks, particularly IoT-driven DDoS attacks. This article explores how these attacks work, why they're uniquely problematic, and how to mitigate them. What Is IoT? IoT (Internet of Things) refers to online, interconnected devices that collect and exchange data. This broad category of devices includes sensors, cameras, network routers, and advanced machinery, and their integration into everyday life and work processes results in an ecosystem that can automate operations, improve decision-making, and enhance user experience. IoT: A Breeding Ground for Botnets IoT's rapid adoption amplifies its vulnerability, as poorly secured devices become easy prey for attackers and may become part of a botnet. Controlled by attackers, botnets can scale and rapidly execute various attacks, including DDoS, data theft, ad fraud, cryptocurrency mining, spam a
Sophisticated Phishing Campaign Deploying Agent Tesla, OriginBotnet, and RedLine Clipper

Sophisticated Phishing Campaign Deploying Agent Tesla, OriginBotnet, and RedLine Clipper

Sep 12, 2023 Endpoint Security / Malware
A sophisticated phishing campaign is using a Microsoft Word document lure to distribute a trifecta of threats, namely Agent Tesla, OriginBotnet, and RedLine Clipper, to gather a wide range of information from compromised Windows machines. "A phishing email delivers the Word document as an attachment, presenting a deliberately blurred image and a counterfeit reCAPTCHA to lure the recipient into clicking on it," Fortinet FortiGuard Labs researcher Cara Lin  said . Clicking on the image leads to the delivery of a loader from a remote server that, in turn, is designed to distribute OriginBotnet for keylogging and password recovery, RedLine Clipper for cryptocurrency theft, and Agent Tesla for harvesting sensitive information. The loader, written in .NET, employs a technique called binary padding by adding null bytes to increase the file's size to 400 MB in an attempt to evade detection by security software. The activation of the loader triggers a multi-stage process to
FBI Dismantles QakBot Malware, Frees 700,000 Computers, Seizes $8.6 Million

FBI Dismantles QakBot Malware, Frees 700,000 Computers, Seizes $8.6 Million

Aug 30, 2023 Malware / Cyber Crime
A coordinated law enforcement effort codenamed  Operation Duck Hunt  has felled  QakBot , a notorious Windows malware family that's estimated to have compromised over 700,000 computers globally and facilitated financial fraud as well as ransomware. To that end, the U.S. Justice Department (DoJ)  said  the malware is "being deleted from victim computers, preventing it from doing any more harm," adding it seized more than $8.6 million in cryptocurrency in illicit profits. The cross-border exercise involved the participation of France, Germany, Latvia, Romania, the Netherlands, the U.K., and the U.S., alongside technical assistance from cybersecurity company Zscaler. The dismantling has been hailed as "the largest U.S.-led financial and technical disruption of a botnet infrastructure leveraged by cybercriminals." No arrests were announced. QakBot, also known as QBot and Pinkslipbot, started its life as a banking trojan in 2007 before morphing into a general-pu
Thousands of Unpatched Openfire XMPP Servers Still Exposed to High-Severity Flaw

Thousands of Unpatched Openfire XMPP Servers Still Exposed to High-Severity Flaw

Aug 24, 2023 Cyber Attack / Vulnerability
Thousands of  Openfire XMPP servers  are unpatched against a recently disclosed high-severity flaw and are susceptible to a new exploit, according to a  new report  from VulnCheck. Tracked as  CVE-2023-32315  (CVSS score: 7.5), the vulnerability relates to a path traversal vulnerability in Openfire's administrative console that could permit an unauthenticated attacker to access otherwise restricted pages reserved for privileged users. It affects all versions of the software released since April 2015, starting with version 3.10.0. It was remediated by its developer, Ignite Realtime, earlier this May with the release of versions 4.6.8, 4.7.5, and 4.8.0. "Path traversal protections were already in place to protect against exactly this kind of attack, but didn't defend against certain non-standard URL encoding for UTF-16 characters that were not supported by the embedded web server that was in use at the time," the maintainers  said  in a detailed advisory. "A
New SkidMap Linux Malware Variant Targeting Vulnerable Redis Servers

New SkidMap Linux Malware Variant Targeting Vulnerable Redis Servers

Aug 07, 2023 Data Security / Linux
Vulnerable  Redis services  have been targeted by a "new, improved, dangerous" variant of a malware called SkidMap that's engineered to target a wide range of Linux distributions. "The malicious nature of this malware is to adapt to the system on which it is executed," Trustwave security researcher Radoslaw Zdonczyk  said  in an analysis published last week. Some of the Linux distribution SkidMap sets its eyes on include Alibaba, Anolis, openEuler, EulerOS, Stream, CentOS, RedHat, and Rocky. SkidMap was  first disclosed  by Trend Micro in September 2019 as a cryptocurrency mining botnet with capabilities to load malicious kernel modules that can obfuscate its activities as well as monitor the miner process. The operators of the malware have also been found camouflaging their backup command-and-control (C2) IP address on the Bitcoin blockchain, evocative of another botnet malware known as  Glupteba . "The technique of fetching real-time data from a de
New P2PInfect Worm Targets Redis Servers with Undocumented Breach Methods

New P2PInfect Worm Targets Redis Servers with Undocumented Breach Methods

Jul 31, 2023 Cyber Threat / Botnet
The P2PInfect peer-to-peer (P2) worm has been observed employing previously undocumented initial access methods to breach susceptible Redis servers and rope them into a botnet. "The malware compromises exposed instances of the Redis data store by exploiting the replication feature," Cado Security researchers Nate Bill and Matt Muir  said  in a report shared with The Hacker News. "A common attack pattern against Redis in cloud environments is to exploit this feature using a malicious instance to enable replication. This is achieved via connecting to an exposed Redis instance and issuing the SLAVEOF command." The Rust-based malware was  first documented  by Palo Alto Networks Unit 42, calling out the malware's ability to exploit a critical Lua sandbox escape vulnerability ( CVE-2022-0543 , CVSS score: 10.0) to obtain a foothold into Redis instances. The campaign is believed to have commenced on or after June 29, 2023. However, the latest discovery suggests th
AVRecon Botnet Leveraging Compromised Routers to Fuel Illegal Proxy Service

AVRecon Botnet Leveraging Compromised Routers to Fuel Illegal Proxy Service

Jul 31, 2023 Network Security / Botnet
More details have emerged about a botnet called  AVRecon , which has been observed making use of compromised small office/home office (SOHO) routers as part of a multi-year campaign active since at least May 2021. AVRecon was  first disclosed  by Lumen Black Lotus Labs earlier this month as malware capable of executing additional commands and stealing victim's bandwidth for what appears to be an illegal proxy service made available for other actors. It has also surpassed QakBot in terms of scale, having infiltrated over 41,000 nodes located across 20 countries worldwide. "The malware has been used to create residential proxy services to shroud malicious activity such as password spraying, web-traffic proxying, and ad fraud," the researchers said in the report. This has been corroborated by new findings from KrebsOnSecurity and Spur.us, which last week  revealed  that "AVrecon is the malware engine behind a 12-year-old service called SocksEscort, which rents hacke
Hackers Target Apache Tomcat Servers for Mirai Botnet and Crypto Mining

Hackers Target Apache Tomcat Servers for Mirai Botnet and Crypto Mining

Jul 27, 2023 Server Security / Cryptocurrency
Misconfigured and poorly secured Apache Tomcat servers are being targeted as part of a new campaign designed to deliver the  Mirai botnet malware  and cryptocurrency miners. The findings come courtesy of Aqua, which detected more than 800 attacks against its Tomcat server honeypots over a two-year time period, with 96% of the attacks linked to the Mirai botnet. Of these attack attempts, 20% (or 152) entailed the use of a web shell script dubbed "neww" that originated from 24 unique IP addresses, with 68% of them originating from a single IP address (104.248.157[.]218). "The threat actor scanned for Tomcat servers and launched a brute force attack against it, attempting to gain access to the Tomcat web application manager by trying different combinations of credentials associated with it," Aqua security researcher Nitzan Yaakov  said . Upon gaining a successful foothold, the threat actors have been observed deploying a  WAR file  that contains a malicious web s
DDoS Botnets Hijacking Zyxel Devices to Launch Devastating Attacks

DDoS Botnets Hijacking Zyxel Devices to Launch Devastating Attacks

Jul 21, 2023 Vulnerability / Botnet
Several distributed denial-of-service (DDoS) botnets have been observed exploiting a critical flaw in Zyxel devices that came to light in April 2023 to gain remote control of vulnerable systems. "Through the capture of exploit traffic, the attacker's IP address was identified, and it was determined that the attacks were occurring in multiple regions, including Central America, North America, East Asia, and South Asia," Fortinet FortiGuard Labs researcher Cara Lin  said . The flaw, tracked as CVE-2023-28771 (CVSS score: 9.8), is a command injection bug affecting multiple firewall models that could potentially allow an unauthorized actor to execute arbitrary code by sending a specifically crafted packet to the targeted appliance. Last month, the Shadowserver Foundation  warned  that the flaw was being "actively exploited to build a Mirai-like botnet" at least since May 26, 2023, an indication of how abuse of  servers running unpatched software  is on the rise.
DDoSia Attack Tool Evolves with Encryption, Targeting Multiple Sectors

DDoSia Attack Tool Evolves with Encryption, Targeting Multiple Sectors

Jul 04, 2023 Malware / Cyber Attack
The threat actors behind the  DDoSia  attack tool have come up with a new version that incorporates a new mechanism to retrieve the list of targets to be bombarded with junk HTTP requests in an attempt to bring them down. The updated variant, written in Golang, "implements an additional security mechanism to conceal the list of targets, which is transmitted from the [command-and-control] to the users," cybersecurity company Sekoia  said  in a technical write-up. DDoSia is attributed to a pro-Russian hacker group called  NoName(057)16 . Launched in 2022 and a successor of the  Bobik botnet , the attack tool is  designed  for staging distributed denial-of-service (DDoS) attacks against targets primarily located in Europe as well as Australia, Canada, and Japan. Lithuania, Ukraine, Poland, Italy, Czechia, Denmark, Latvia, France, the U.K., and Switzerland have emerged as the most targeted countries over a period ranging from May 8 to June 26, 2023. A total of 486 different w
New Condi Malware Hijacking TP-Link Wi-Fi Routers for DDoS Botnet Attacks

New Condi Malware Hijacking TP-Link Wi-Fi Routers for DDoS Botnet Attacks

Jun 21, 2023 Network Security / Botnet
A new malware called  Condi  has been observed exploiting a security vulnerability in TP-Link Archer AX21 (AX1800) Wi-Fi routers to rope the devices into a distributed denial-of-service (DDoS) botnet. Fortinet FortiGuard Labs  said  the campaign has ramped up since the end of May 2023. Condi is the work of a threat actor who goes by the online alias zxcr9999 on Telegram and runs a Telegram channel called Condi Network to advertise their warez. "The Telegram channel was started in May 2022, and the threat actor has been monetizing its botnet by providing DDoS-as-a-service and selling the malware source code," security researchers Joie Salvio and Roy Tay said. An analysis of the malware artifact reveals its ability to terminate other competing botnets on the same host. It, however, lacks a persistence mechanism, meaning the program cannot survive a system reboot. To get around this limitation, the malware deletes multiple binaries that are used to shut down or reboot the
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