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A new Linux security vulnerability dubbed Looney Tunables has been discovered in the GNU C library’s ld.so dynamic loader that, if successfully exploited, could lead to a local privilege escalation and allow a threat actor to gain root privileges. Tracked as CVE-2023-4911 (CVSS score: 7.8), the issue is a buffer overflow that resides in the […]
The China-linked threat actor known as Earth Lusca has been observed targeting government entities using a never-before-seen Linux backdoor called SprySOCKS. Earth Lusca was first documented by Trend Micro in January 2022, detailing the adversary’s attacks against public and private sector entities across Asia, Australia, Europe, North America. Active since 2021, the group has relied […]
Recently disclosed security flaws impacting Juniper firewalls, Openfire, and Apache RocketMQ servers have come under active exploitation in the wild, according to multiple reports. The Shadowserver Foundation said that it’s “seeing exploitation attempts from multiple IPs for Juniper J-Web CVE-2023-36844 (& friends) targeting /webauth_operation.php endpoint,” the same day a proof-of-concept (PoC) became available. The issues, […]
The threat actors behind the Monti ransomware have resurfaced after a two-month break with a new Linux version of the encryptor in its attacks targeting government and legal sectors. Monti emerged in June 2022, weeks after the Conti ransomware group shut down its operations, deliberately imitating the tactics and tools associated with the latter, including […]
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 […]
Threat actors are using an open-source rootkit called Reptile to target Linux systems in South Korea. “Unlike other rootkit malware that typically only provide concealment capabilities, Reptile goes a step further by offering a reverse shell, allowing threat actors to easily take control of systems,” the AhnLab Security Emergency Response Center (ASEC) said in a […]
A new study conducted by Uptycs has uncovered a stark increase in the distribution of information stealing (a.k.a. infostealer or stealer) malware. Incidents have more than doubled in Q1 2023, indicating an alarming trend that threatens global organizations. According to the new Uptycs’ whitepaper, Stealers are Organization Killers, a variety of new info stealers have […]
A new fileless attack dubbed PyLoose has been observed striking cloud workloads with the goal of delivering a cryptocurrency miner, new findings from Wiz reveal. “The attack consists of Python code that loads an XMRig Miner directly into memory using memfd, a known Linux fileless technique,” security researchers Avigayil Mechtinger, Oren Ofer, and Itamar Gilad […]
Details have emerged about a newly identified security flaw in the Linux kernel that could allow a user to gain elevated privileges on a target host. Dubbed StackRot (CVE-2023-3269, CVSS score: 7.8), the flaw impacts Linux versions 6.1 through 6.4. There is no evidence that the shortcoming has been exploited in the wild to date. […]
The threat actor known as ChamelGang has been observed using a previously undocumented implant to backdoor Linux systems, marking a new expansion of the threat actor’s capabilities. The malware, dubbed ChamelDoH by Stairwell, is a C++-based tool for communicating via DNS-over-HTTPS (DoH) tunneling. ChamelGang was first outed by Russian cybersecurity firm Positive Technologies in September […]
Linux routers in Japan are the target of a new Golang remote access trojan (RAT) called GobRAT. “Initially, the attacker targets a router whose WEBUI is open to the public, executes scripts possibly by using vulnerabilities, and finally infects the GobRAT,” the JPCERT Coordination Center (JPCERT/CC) said in a report published today. The compromise of […]
A new ransomware-as-service (RaaS) operation called MichaelKors has become the latest file-encrypting malware to target Linux and VMware ESXi systems as of April 2023. The development points to cybercriminal actors increasingly setting their eyes on the ESXi, cybersecurity firm CrowdStrike said in a report shared with The Hacker News. “This trend is especially noteworthy given […]
A previously undocumented and mostly undetected variant of a Linux backdoor called BPFDoor has been spotted in the wild, cybersecurity firm Deep Instinct said in a technical report published this week. “BPFDoor retains its reputation as an extremely stealthy and difficult-to-detect malware with this latest iteration,” security researchers Shaul Vilkomir-Preisman and Eliran Nissan said. BPFDoor […]
The threat actors behind RTM Locker have developed a ransomware strain that’s capable of targeting Linux machines, marking the group’s first foray into the open source operating system. “Its locker ransomware infects Linux, NAS, and ESXi hosts and appears to be inspired by Babuk ransomware’s leaked source code,” Uptycs said in a new report published […]
The notorious North Korea-aligned state-sponsored actor known as the Lazarus Group has been attributed to a new campaign aimed at Linux users. The attacks are part of a persistent and long-running activity tracked under the name Operation Dream Job, ESET said in a new report published today. The findings are crucial, not least because it […]
The Pakistan-based advanced persistent threat (APT) actor known as Transparent Tribe used a two-factor authentication (2FA) tool used by Indian government agencies as a ruse to deliver a new Linux backdoor called Poseidon. “Poseidon is a second-stage payload malware associated with Transparent Tribe,” Uptycs security researcher Tejaswini Sandapolla said in a technical report published this […]
A Chinese state-sponsored threat activity group tracked as RedGolf has been attributed to the use of a custom Windows and Linux backdoor called KEYPLUG. “RedGolf is a particularly prolific Chinese state-sponsored threat actor group that has likely been active for many years against a wide range of industries globally,” Recorded Future told The Hacker News. […]
An unknown Chinese state-sponsored hacking group has been linked to a novel piece of malware aimed at Linux servers. French cybersecurity firm ExaTrack, which found three samples of the previously documented malicious software that date back to early 2022, dubbed it Mélofée. One of the artifacts is designed to drop a kernel-mode rootkit that’s based […]
Poorly managed Linux SSH servers are being targeted as part of a new campaign that deploys different variants of a malware called ShellBot. “ShellBot, also known as PerlBot, is a DDoS Bot malware developed in Perl and characteristically uses IRC protocol to communicate with the C&C server,” AhnLab Security Emergency response Center (ASEC) said in […]
A previously known Windows-based ransomware strain known as IceFire has expanded its focus to target Linux enterprise networks belonging to several media and entertainment sector organizations across the world. The intrusions entail the exploitation of a recently disclosed deserialization vulnerability in IBM Aspera Faspex file-sharing software (CVE-2022-47986, CVSS score: 9.8), according to cybersecurity company SentinelOne. […]
The threat actor known as Lucky Mouse has developed a Linux version of a malware toolkit called SysUpdate, expanding on its ability to target devices running the operating system. The oldest version of the updated artifact dates back to July 2022, with the malware incorporating new features designed to evade security software and resist reverse […]