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China-Linked Hackers Used ROOTROT Webshell in MITRE Network Intrusion

China-Linked Hackers Used ROOTROT Webshell in MITRE Network Intrusion

May 07, 2024 Vulnerability / Network Security
The MITRE Corporation has offered more details into the recently disclosed cyber attack, stating that the first evidence of the intrusion now dates back to December 31, 2023. The attack, which  came to light last month , singled out MITRE's Networked Experimentation, Research, and Virtualization Environment (NERVE) through the exploitation of two Ivanti Connect Secure zero-day vulnerabilities tracked as CVE-2023–46805 and CVE-2024–21887, respectively. "The adversary maneuvered within the research network via VMware infrastructure using a compromised administrator account, then employed a combination of backdoors and web shells to maintain persistence and harvest credentials," MITRE  said . While the organization had previously disclosed that the attackers performed reconnaissance of its networks starting in January 2024, the latest technical deep dive puts the earliest signs of compromise in late December 2023, with the adversary dropping a Perl-based web shell calle
Critical Atlassian Flaw Exploited to Deploy Linux Variant of Cerber Ransomware

Critical Atlassian Flaw Exploited to Deploy Linux Variant of Cerber Ransomware

Apr 17, 2024 Encryption / Vulnerability
Threat actors are exploiting unpatched Atlassian servers to deploy a Linux variant of Cerber (aka C3RB3R) ransomware. The attacks leverage  CVE-2023-22518  (CVSS score: 9.1), a critical security vulnerability impacting the Atlassian Confluence Data Center and Server that allows an unauthenticated attacker to reset Confluence and create an administrator account. Armed with this access, a threat actor could take over affected systems, leading to a full loss of confidentiality, integrity, and availability. According to cloud security firm Cado, financially motivated cybercrime groups have been observed abusing the newly created admin account to install the Effluence web shell plugin and allow for the execution of arbitrary commands on the host. "The attacker uses this web shell to download and run the primary Cerber payload," Nate Bill, threat intelligence engineer at Cado,  said  in a report shared with The Hacker News. "In a default install, the Confluence applicati
AndroxGh0st Malware Targets Laravel Apps to Steal Cloud Credentials

AndroxGh0st Malware Targets Laravel Apps to Steal Cloud Credentials

Mar 21, 2024 Threat Intelligence / Vulnerability
Cybersecurity researchers have shed light on a tool referred to as  AndroxGh0st  that's used to target Laravel applications and steal sensitive data. "It works by scanning and taking out important information from .env files, revealing login details linked to AWS and Twilio," Juniper Threat Labs researcher Kashinath T Pattan  said . "Classified as an SMTP cracker, it exploits SMTP using various strategies such as credential exploitation, web shell deployment, and vulnerability scanning." AndroxGh0st has been detected in the wild since at least 2022, with threat actors leveraging it to access Laravel environment files and steal credentials for various cloud-based applications like Amazon Web Services (AWS), SendGrid, and Twilio. Attack chains involving the Python malware are known to exploit known security flaws in Apache HTTP Server, Laravel Framework, and PHPUnit to gain initial access and for privilege escalation and persistence. Earlier this January, U
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What's the Right EDR for You?

What's the Right EDR for You?

May 10, 2024Endpoint Security / Threat Detection
A guide to finding the right endpoint detection and response (EDR) solution for your business' unique needs. Cybersecurity has become an ongoing battle between hackers and small- and mid-sized businesses. Though perimeter security measures like antivirus and firewalls have traditionally served as the frontlines of defense, the battleground has shifted to endpoints. This is why endpoint detection and response (EDR) solutions now serve as critical weapons in the fight, empowering you and your organization to detect known and unknown threats, respond to them quickly, and extend the cybersecurity fight across all phases of an attack.  With the growing need to defend your devices from today's cyber threats, however, choosing the right EDR solution can be a daunting task. There are so many options and features to choose from, and not all EDR solutions are made with everyday businesses and IT teams in mind. So how do you pick the best solution for your needs? Why EDR Is a Must Because of
Fortra Patches Critical RCE Vulnerability in FileCatalyst Transfer Tool

Fortra Patches Critical RCE Vulnerability in FileCatalyst Transfer Tool

Mar 18, 2024 Vulnerability / Threat Mitigation
Fortra has released details of a now-patched critical security flaw impacting its  FileCatalyst  file transfer solution that could allow unauthenticated attackers to gain remote code execution on susceptible servers. Tracked as CVE-2024-25153, the shortcoming carries a CVSS score of 9.8 out of a maximum of 10. "A directory traversal within the 'ftpservlet' of the FileCatalyst Workflow Web Portal allows files to be uploaded outside of the intended 'uploadtemp' directory with a specially crafted POST request," the company  said  in an advisory last week. "In situations where a file is successfully uploaded to web portal's DocumentRoot, specially crafted JSP files could be used to execute code, including web shells." The vulnerability, the company said, was first reported on August 9, 2023, and addressed two days later in FileCatalyst Workflow version 5.1.6 Build 114 without a CVE identifier. Fortra was  authorized  as a CVE Numbering Authorit
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
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
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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