8 US telcos compromised, FBI advises Americans to use encrypted communications - Help Net Security
FBI and CISA officials have advised Americans to use encrypted call and messaging apps to protect their communications from threat actors.
Enhanced Visibility and Hardening Guidance for Communications Infrastructure
This guide provides network engineers and defenders of communications infrastructure with best practices to strengthen their visibility and harden their network
FBI, CISA urge Americans to use secure messaging apps in wake of massive cyberattack
Your unencrypted RCS messages between iPhones and Android devices can be spied on by foreign attackers. Here's how to protect yourself.
2023 Top Routinely Exploited Vulnerabilities | CISA
In 2023, malicious cyber actors exploited more zero-day vulnerabilities to compromise enterprise networks compared to 2022, allowing them to conduct cyber operations against higher-priority targets. In 2023, the majority of the most frequently exploited vulnerabilities were initially exploited as a zero-day, which is an increase from 2022, when less than half of the top exploited vulnerabilities were exploited as a zero-day. Malicious cyber actors continue to have the most success exploiting vulnerabilities within two years after public disclosure of the vulnerability. The utility of these vulnerabilities declines over time as more systems are patched or replaced. Malicious cyber actors find less utility from zero-day exploits when international cybersecurity efforts reduce the lifespan of zero-day vulnerabilities.
Critical Ivanti vTM auth bypass bug now exploited in attacks
CISA has tagged another critical Ivanti security vulnerability, which can let threat actors create rogue admin users on vulnerable Virtual Traffic Manager (vTM) appliances, as actively exploited in attacks.
Multiple attacks forces CISA to order agencies to upgrade or remove end-of-life Ivanti appliance
The nation’s top cyber watchdogs urged federal agencies to either remove or upgrade an Ivanti appliance that is no longer being updated and has been exploited in attacks.
Russian Military Cyber Actors Target US and Global Critical Infrastructure
The Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and National Security Agency (NSA) assess that cyber actors affiliated with the Russian General Staff Main Intelligence Directorate (GRU) 161st Specialist Training Center (Unit 29155) are responsible for computer network operations against global targets for the purposes of espionage, sabotage, and reputational harm since at least 2020. GRU Unit 29155 cyber actors began deploying the destructive WhisperGate malware against multiple Ukrainian victim organizations as early as January 13, 2022. These cyber actors are separate from other known and more established GRU-affiliated cyber groups, such as Unit 26165 and Unit 74455.
White House working on cyber insurance policy proposal for ‘catastrophic’ incidents
At the Black Hat cybersecurity conference on Thursday, National Cyber Director Harry Coker, Jr. said his office is working with the Department of Treasury’s federal insurance office as well as officials at the Cybersecurity and Infrastructure Security Agency (CISA) on the effort.
Chinese APT40 hackers hijack SOHO routers to launch attacks
An advisory by CISA and multiple international cybersecurity agencies highlights the tactics, techniques, and procedures (TTPs) of APT40 (aka
CISA confirms hackers may have accessed data from chemical facilities during January incident
The agency found no evidence that hackers exfiltrated information but noted the intrusion “may have resulted in the potential unauthorized access” to security plans, vulnerability assessments and user accounts within a national system to protect the chemicals sector.
CISA: Email from federal agencies possibly accessed in Russian breach of Microsoft
CISA publicly released an emergency directive issued to federal agencies earlier this month, detailing how a breach at Microsoft could have affected the government.
Why CISA is Warning CISOs About a Breach at Sisense
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) said today it is investigating a breach at business intelligence company Sisense, whose products are designed to allow companies to view the status of multiple third-party online services in a single dashboard.…
Understanding and Responding to Distributed Denial-Of-Service Attacks
This joint guide, Understanding and Responding to Distributed Denial-Of-Service Attacks, addresses the specific needs and challenges faced by organizations in defending against DDoS attacks. The guidance now includes detailed insight into three different types of DDoS techniques: Volumetric, attacks aiming to consume available bandwidth. Protocol, attacks which exploit vulnerabilities in network protocols. * Application, attacks targeting vulnerabilities in specific applications or running services.
CISA forced to take two systems offline last month after Ivanti compromise
Hackers breached the systems of the Cybersecurity and Infrastructure Security Agency (CISA) in February through vulnerabilities in Ivanti products, officials said.
CISA, FBI, and MS-ISAC Release Advisory on Phobos Ransomware
Today, CISA, the Federal Bureau of Investigation (FBI), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) released a joint Cybersecurity Advisory (CSA), #StopRansomware: Phobos Ransomware, to disseminate known tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs), which are from incident response investigations tied to Phobos ransomware activity from as recently as February, 2024.
Phobos Ransomware Aggressively Targeting U.S. Critical Infrastructure
U.S. cybersecurity and intelligence agencies have warned of Phobos ransomware attacks targeting government and critical infrastructure entities, outlining the various tactics and techniques the threat actors have adopted to deploy the file-encrypting malware. "Structured as a ransomware-as-a-service (RaaS) model, Phobos ransomware actors have targeted entities including municipal and county governments, emergency services, education, public healthcare, and critical infrastructure to successfully ransom several million in U.S. dollars," the government said.
ALPHV/BlackCat hits healthcare after retaliation threat, FBI says
The gang claimed responsibility for a high-profile attack against Change Healthcare Wednesday.
CISA cautions against using hacked Ivanti VPN gateways even after factory resets
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) revealed today that attackers who hack Ivanti VPN appliances using one of multiple actively exploited vulnerabilities may be able to maintain root persistence even after performing factory resets.
Threat Actors Exploit Multiple Vulnerabilities in Ivanti Connect Connect and Policy Secure Gateways | CISA
Based upon the authoring organizations’ observations during incident response activities and available industry reporting, as supplemented by CISA’s research findings, the authoring organizations recommend that the safest course of action for network defenders is to assume a sophisticated threat actor may deploy rootkit level persistence on a device that has been reset and lay dormant for an arbitrary amount of time. For example, as outlined in PRC State-Sponsored Actors Compromise and Maintain Persistent Access to U.S. Critical Infrastructure), sophisticated actors may remain silent on compromised networks for long periods. The authoring organizations strongly urge all organizations to consider the significant risk of adversary access to, and persistence on, Ivanti Connect Secure and Ivanti Policy Secure gateways when determining whether to continue operating these devices in an enterprise environment.
Threat Actor Leverages Compromised Account of Former Employee to Access State Government Organization | CISA
The Cybersecurity and Infrastructure Security Agency (CISA) and the Multi-State Information Sharing & Analysis Center (MS-ISAC) conducted an incident response assessment of a state government organization’s network environment after documents containing host and user information, including metadata, were posted on a dark web brokerage site. Analysis confirmed that an unidentified threat actor compromised network administrator credentials through the account of a former employee—a technique commonly leveraged by threat actors—to successfully authenticate to an internal virtual private network (VPN) access point, further navigate the victim’s on-premises environment, and execute various lightweight directory access protocol (LDAP) queries against a domain controller.[1] Analysis also focused on the victim’s Azure environment, which hosts sensitive systems and data, as well as the compromised on-premises environment. Analysis determined there were no indications the threat actor further compromised the organization by moving laterally from the on-premises environment to the Azure environment.
Technology News Government News Get more insights with the Recorded Future Intelligence Cloud. Learn more. In alerting about two Citrix bugs, CISA recommends immediate attention for one
Two bugs in Citrix technology are drawing serious attention this week from the Cybersecurity and Infrastructure Security Agency. CISA says federal agencies much patch one of the vulnerabilities — tagged as CVE-2023-6548 — by January 24. It’s one of the rare times the cyber agency has put a remediation date of less than three weeks on a vulnerability. CISA did not respond to requests for comment about why the remediation timeline was shorter than most. The other bug — listed as CVE-2023-6548 — must be fixed by February 7. CISA’s alerts are aimed at federal agencies but often serve as general warnings for the public.
Act Now: CISA Flags Active Exploitation of Microsoft SharePoint Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical security vulnerability impacting Microsoft SharePoint Server to its