Web Shell | Breaking Cybersecurity News | The Hacker News

An unspecified government entity in Afghanistan was targeted by a previously undocumented web shell called  HrServ  in what's suspected to be an advanced persistent threat (APT) attack. The web shell, a dynamic-link library (DLL) named "hrserv.dll," exhibits "sophisticated features such as custom encoding methods for client communication and in-memory execution," Kaspersky security researcher Mert Degirmenci  said  in an analysis published this week. The Russian cybersecurity firm said it identified variants of the malware dating all the way back to early 2021 based on the compilation timestamps of these artifacts. Web shells are typically  malicious tools  that provide remote control over a compromised server. Once uploaded, it allows threat actors to carry out a range of post-exploitation activities, including data theft, server monitoring, and lateral advancement within the network. The attack chain involves the  PAExec  remote administration tool, an alternative to  PsExec  t

An active malware campaign is leveraging two zero-day vulnerabilities with remote code execution (RCE) functionality to rope routers and video recorders into a Mirai-based distributed denial-of-service (DDoS) botnet. "The payload targets routers and network video recorder (NVR) devices with default admin credentials and installs Mirai variants when successful," Akamai  said  in an advisory published this week. Details of the flaws are currently under wraps to allow the two vendors to publish patches and prevent other threat actors from abusing them. The fixes for one of the vulnerabilities are expected to be shipped next month. The attacks were first discovered by the web infrastructure and security company against its honeypots in late October 2023. The perpetrators of the attacks have not been identified as yet. The botnet, which has been codenamed InfectedSlurs due to the use of racial and offensive language in the command-and-control (C2) servers and hard-coded strings, is a 

Wing Security recently announced that basic third-party risk assessment is  now available as a free product . But it raises the questions of how SaaS is connected to third-party risk management (TPRM) and what companies should do to ensure a proper SaaS-TPRM process is in place. In this article we will share 5 tips to manage the third-party risks associated with SaaS, but first...  What exactly is Third-Party Risk Management in SaaS? SaaS is rapidly growing, offering businesses convenience, swift implementations, and valuable opportunities. However, this growth introduces a security challenge where risks arise from the interconnected nature of SaaS supply chains. It is clear that before onboarding a new contractor or vendor, we need due diligence, security checks, and referrals. However, we now understand that in the SaaS domain, applications are, in fact, the go-to vendor of choice.  Let's explain: Any employee can very easily connect SaaS vendors to company data, granting them pe

Cybersecurity researchers have discovered a stealthy backdoor named  Effluence  that's deployed following the successful exploitation of a recently disclosed security flaw in Atlassian Confluence Data Center and Server. "The malware acts as a persistent backdoor and is not remediated by applying patches to Confluence," Aon's Stroz Friedberg Incident Response Services  said  in an analysis published earlier this week. "The backdoor provides capability for lateral movement to other network resources in addition to exfiltration of data from Confluence. Importantly, attackers can access the backdoor remotely without authenticating to Confluence." The attack chain documented by the cybersecurity entity entailed the exploitation of  CVE-2023-22515  (CVSS score: 10.0), a critical bug in Atlassian that could be abused to create unauthorized Confluence administrator accounts and access Confluence servers. Atlassian has since disclosed a second flaw known as  CV

VoIP phones using Digium's software have been targeted to drop a web shell on their servers as part of an attack campaign designed to exfiltrate data by downloading and executing additional payloads. "The malware installs multilayer obfuscated PHP backdoors to the web server's file system, downloads new payloads for execution, and schedules recurring tasks to re-infect the host system," Palo Alto Networks Unit 42  said  in a Friday report. The unusual activity is said to have commenced in mid-December 2021 and targets Asterisk, a widely used software implementation of a private branch exchange (PBX) that runs on the open-source Elastix Unified Communications Server. Unit 42 said the intrusions share similarities with the  INJ3CTOR3 campaign  that Israeli cybersecurity firm Check Point disclosed in November 2020, alluding to the possibility that they could be a "resurgence" of the previous attacks. Coinciding with the sudden surge is the public disclos

Cybercrime groups are distributing malicious PHP web shells disguised as a favicon to maintain remote access to the compromised servers and inject JavaScript skimmers into online shopping platforms with an aim to steal financial information from their users. "These web shells known as Smilodon or Megalodon are used to dynamically load JavaScript skimming code via server-side requests into online stores," Malwarebytes Jérôme Segura  said  in a Thursday write-up. "This technique is interesting as most client-side security tools will not be able to detect or block the skimmer." Injecting web skimmers on e-commerce websites to steal credit card details is a tried-and-tested modus operandi of Magecart, a consortium of different hacker groups who target online shopping cart systems. Also known as formjacking attacks, the skimmers take the form of JavaScript code that the operators stealthily insert into an e-commerce website, often on payment pages, with an intent to c