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Ivanti Vulnerability Exploited to Install 'DSLog' Backdoor on 670+ IT Infrastructures

Ivanti Vulnerability Exploited to Install 'DSLog' Backdoor on 670+ IT Infrastructures
Feb 13, 2024 Vulnerability / Cyber Threat
Threat actors are leveraging a recently disclosed security flaw impacting Ivanti Connect Secure, Policy Secure, and ZTA gateways to deploy a backdoor codenamed  DSLog  on susceptible devices. That's according to  findings  from Orange Cyberdefense, which said it observed the exploitation of CVE-2024-21893 within hours of the public release of the proof-the-concept (PoC) code. CVE-2024-21893, which was  disclosed  by Ivanti late last month alongside CVE-2024-21888, refers to a server-side request forgery (SSRF) vulnerability in the SAML module that, if successfully exploited, could permit access to otherwise restricted resources sans any authentication. The Utah-based company has since acknowledged that the flaw has limited targeted attacks, although the exact scale of the compromises is unclear. Then, last week, the Shadowserver Foundation  revealed  a surge in exploitation attempts targeting the vulnerability originating from over 170 unique IP addresses, shortly after both

CISA Issues Emergency Directive to Federal Agencies on Ivanti Zero-Day Exploits

CISA Issues Emergency Directive to Federal Agencies on Ivanti Zero-Day Exploits
Jan 20, 2024 Network Security / Threat Intelligence
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday issued an  emergency directive  urging Federal Civilian Executive Branch (FCEB) agencies to implement mitigations against two actively exploited zero-day flaws in Ivanti Connect Secure (ICS) and Ivanti Policy Secure (IPS) products. The development arrives as the  vulnerabilities  – an authentication bypass (CVE-2023-46805) and a code injection bug (CVE-2024-21887) – have come under widespread exploitation by multiple threat actors. The flaws allow a malicious actor to craft malicious requests and execute arbitrary commands on the system. The U.S. company  acknowledged  in an advisory that it has witnessed a "sharp increase in threat actor activity" starting on January 11, 2024, after the shortcomings were publicly disclosed. "Successful exploitation of the vulnerabilities in these affected products allows a malicious threat actor to move laterally, perform data exfiltration, and establish per

How to Achieve the Best Risk-Based Alerting (Bye-Bye SIEM)

How to Achieve the Best Risk-Based Alerting (Bye-Bye SIEM)
Feb 19, 2024Network Detection and Response
Did you know that Network Detection and Response (NDR) has become the most effective technology to detect cyber threats? In contrast to SIEM, NDR offers adaptive cybersecurity with reduced false alerts and efficient threat response. Are you aware of  Network Detection and Response (NDR)  and how it's become the most effective technology to detect cyber threats?  NDR massively upgrades your security through risk-based alerting, prioritizing alerts based on the potential risk to your organization's systems and data. How? Well, NDR's real-time analysis, machine learning, and threat intelligence provide immediate detection, reducing alert fatigue and enabling better decision-making. In contrast to SIEM, NDR offers adaptive cybersecurity with reduced false positives and efficient threat response. Why Use Risk-Based Alerting? Risk-based alerting is an approach where security alerts and responses are prioritized based on the level of risk they pose to an organization's system

Chinese Hackers Exploit Zero-Day Flaws in Ivanti Connect Secure and Policy Secure

Chinese Hackers Exploit Zero-Day Flaws in Ivanti Connect Secure and Policy Secure
Jan 11, 2024 Cybersecurity / Zero-Day
A pair of zero-day flaws identified in Ivanti Connect Secure (ICS) and Policy Secure have been chained by suspected China-linked nation-state actors to breach less than 10 customers. Cybersecurity firm Volexity, which  identified  the activity on the network of one of its customers in the second week of December 2023, attributed it to a hacking group it tracks under the name  UTA0178 . There is evidence to suggest that the VPN appliance may have been compromised as early as December 3, 2023. The two vulnerabilities that have been exploited in the wild to achieve unauthenticated command execution on the ICS device are as follows - CVE-2023-46805  (CVSS score: 8.2) - An authentication bypass vulnerability in the web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure allows a remote attacker to access restricted resources by bypassing control checks. CVE-2024-21887  (CVSS score: 9.1) - A command injection vulnerability in web components of Ivanti Connect Secur

Are You Vulnerable to Third-Party Breaches Through Interconnected SaaS Apps?

cyber security
websiteWing SecuritySaaS Security / Risk Management
Protect against cascading risks by identifying and mitigating app2app and third-party SaaS vulnerabilities.

Rogue WordPress Plugin Exposes E-Commerce Sites to Credit Card Theft

Rogue WordPress Plugin Exposes E-Commerce Sites to Credit Card Theft
Dec 22, 2023 Skimming / Web Security
Threat hunters have discovered a rogue WordPress plugin that's capable of creating bogus administrator users and injecting malicious JavaScript code to steal credit card information. The skimming activity is part of a  Magecart campaign  targeting e-commerce websites, according to Sucuri. "As with many other malicious or fake WordPress plugins it contains some deceptive information at the top of the file to give it a veneer of legitimacy," security researcher Ben Martin  said . "In this case, comments claim the code to be 'WordPress Cache Addons.'" Malicious plugins typically find their way to WordPress sites via either a  compromised admin user  or the  exploitation of security flaws  in another plugin already installed on the site. Post installation, the plugin replicates itself to the  mu-plugins  (or must-use plugins) directory so that it's automatically enabled and conceals its presence from the admin panel. "Since the only way to re

Hackers Exploited ColdFusion Vulnerability to Breach Federal Agency Servers

Hackers Exploited ColdFusion Vulnerability to Breach Federal Agency Servers
Dec 06, 2023 Vulnerability / Web Server Security
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned of active exploitation of a  high-severity Adobe ColdFusion vulnerability  by unidentified threat actors to gain initial access to government servers. "The vulnerability in ColdFusion (CVE-2023-26360) presents as an improper access control issue and exploitation of this CVE can result in arbitrary code execution," CISA  said , adding an unnamed federal agency was targeted between June and July 2023. The shortcoming affects ColdFusion 2018 (Update 15 and earlier versions) and ColdFusion 2021 (Update 5 and earlier versions). It has been addressed in versions Update 16 and Update 6, respectively, released on March 14, 2023. It was added by CISA to the Known Exploited Vulnerabilities (KEV) catalog a day later, citing evidence of active exploitation in the wild. Adobe, in an advisory released around that time, said it's aware of the flaw being "exploited in the wild in very limited attacks."

New 'HrServ.dll' Web Shell Detected in APT Attack Targeting Afghan Government

New 'HrServ.dll' Web Shell Detected in APT Attack Targeting Afghan Government
Nov 25, 2023 Cyber Attack / Threat Intelligence
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

Mirai-based Botnet Exploiting Zero-Day Bugs in Routers and NVRs for Massive DDoS Attacks

Mirai-based Botnet Exploiting Zero-Day Bugs in Routers and NVRs for Massive DDoS Attacks
Nov 23, 2023 Vulnerability / Cyber Threat
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 

Alert: 'Effluence' Backdoor Persists Despite Patching Atlassian Confluence Servers

Alert: 'Effluence' Backdoor Persists Despite Patching Atlassian Confluence Servers
Nov 10, 2023 Cyber Attack / Threat Intelligence
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

Hackers Targeting VoIP Servers By Exploiting Digium Phone Software

Hackers Targeting VoIP Servers By Exploiting Digium Phone Software
Jul 16, 2022
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

Magecart Hackers Now hide PHP-Based Backdoor In Website Favicons

Magecart Hackers Now hide PHP-Based Backdoor In Website Favicons
May 14, 2021
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
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