- New Cring ransomware hits unpatched Fortinet VPN devices
April 7, 2021
A vulnerability impacting Fortinet VPNs is being exploited by a new human-operated ransomware strain known as Cring to breach and encrypt industrial sector companies’ networks. Cring ransomware (also known as Crypt3r, Vjiszy1lo, Ghost, Phantom) was discovered by Amigo_A in January and spotted by the CSIRT team of Swiss telecommunications provider Swisscom. The Cring operators drop customized Mimikatz ...
- FBI: APTs Actively Exploiting Fortinet VPN Security Holes
April 3, 2021
The FBI and the Cybersecurity and Infrastructure Security Agency are warning that advanced persistent threat (APT) nation-state actors are actively exploiting known security vulnerabilities in the Fortinet FortiOS cybersecurity operating system, affecting the company’s SSL VPN products. According to an alert issued Friday by the FBI and CISA, cyberattackers are scanning devices on ports 4443, 8443 ...
- Hancitor’s Use of Cobalt Strike and a Noisy Network Ping Tool
April 1, 2021
Hancitor is an information stealer and malware downloader used by a threat actor designated as MAN1, Moskalvzapoe or TA511. In a threat brief from 2018, we noted Hancitor was relatively unsophisticated, but it would remain a threat for years to come. Approximately three years later, Hancitor remains a threat and has evolved to use tools ...
- Critical netmask networking bug impacts thousands of applications
March 28, 2021
Popular npm library netmask has a critical networking vulnerability. Netmask is frequently used by hundreds of thousands of applications to parse IPv4 addresses and CIDR blocks or compare them. The component gets over 3 million weekly downloads, and as of today, has scored over 238 million total downloads over its lifetime. Further, about 278,000 GitHub repositories depend ...
- Cisco Plugs Security Hole in Small Business Routers
March 17, 2021
A popular line of small business routers made by Cisco Systems are vulnerable to a high-severity vulnerability. If exploited, the flaw could allow a remote – albeit authenticated – attacker to execute code or restart affected devices unexpectedly. Cisco issued fixes on Wednesday for the flaw in its RV132W ADSL2+ Wireless-N VPN routers and RV134W VDSL2 ...
- New Mirai Variant Targeting Network Security Devices
March 15, 2021
On Feb. 23, 2021, one of the IPs involved in the attack was updated to serve a Mirai variant leveraging CVE-2021-27561 and CVE-2021-27562, mere hours after vulnerability details were published. On March 3, 2021, the same samples were served from a third IP address, with the addition of an exploit leveraging CVE-2021-22502. Furthermore, on March ...
- D-Link, IoT Devices Under Attack By Tor-Based Gafgyt Variant
March 5, 2021
Researchers have discovered what they say is the first variant of the Gafgyt botnet family to cloak its activity using the Tor network. Gafgyt, a botnet that was uncovered in 2014, has become infamous for launching large-scale distributed denial-of-service (DDoS) attacks. Researchers first discovered activity from the newest variant, which they call Gafgyt_tor, on Feb. 15. In ...
- Fast Flux 101: How Cybercriminals Improve the Resilience of Their Infrastructure to Evade Detection and Law Enforcement Takedowns
March 2, 2021
Fast flux is a technique used by cybercriminals to increase their infrastructure’s resilience by making law enforcement takedown of their servers and blocklisting of their IP addresses harder. It is critical for these cybercriminals to maintain their networks’ uptime to avoid losses to their revenue streams, including phishing and scam campaigns, botnet rental and illegal ...
- Cybersecurity firm Genua fixes a critical flaw in its GenuGate High Resistance Firewall
March 1, 2021
Germany-based cybersecurity company Genua has fast-tracked a fix for a critical flaw in one of its firewall products. If exploited, the vulnerability could allow local attackers to bypass authentication measures and log in to internal company networks with the highest level of privileges. Genua says it offers more than 20 security solutions for encrypting data communication ...
- SonicWall releases additional update for SMA 100 vulnerability
February 20, 2021
SonicWall has released a second firmware update for an SMA-100 zero-day vulnerability known to be used in attacks and is warning to install it immediately. Last month, SonicWall disclosed that their internal systems were attacked using a zero-day vulnerability in their SMA-100 remote access devices. A week later, cybersecurity firm NCC Group discovered the zero-day vulnerability used ...