Showing posts with label Comodo. Show all posts
Showing posts with label Comodo. Show all posts

Sunday, 10 December 2017

Strong Increase Of Phishing Sites That Use Https



Not only legitimate websites use https more and more, phishing sites also have more and more access to a secure connection. There is even a strong increase in the number of https phishing sites, according to security company PhishLabs . In the third quarter of this year almost 25 percent of the observed phishing sites had a https connection.

A quarter earlier was still about 12 percent, while a year ago less than 3 percent of the phishing sites had a ssl certificate. According to the security company, there are two reasons why there is an increase in https usage among phishing sites. The first reason is that phishing sites are regularly offered via hacked, legitimate websites. When a legitimate website with a ssl certificate is hacked, the phishing page that is offered via the website will also have a secure connection.


The second reason according to PhishLabs is that criminals register domains for their phishing site and then enable https themselves. This then happens via certificate authorities that offer free ssl certificates, such as Let's Encrypt and Comodo. In this way, the phishing site looks more legitimate, says Crane Hassold of PhishLabs. Chrome automatically displays the "Safe" message at https sites. This refers to the secure connection, but end users think the website they are visiting is safe, Hassold notes.

"The misunderstanding about the meaning of https among the general public and the confusing appointment of https websites in browsers are the main reasons why it is a popular preference of phishers in hosting phishing sites," Hassold continues. "Combined with the rapid growth of https among website owners, we expect the number of https phishing sites to grow further."

Thursday, 12 November 2015

Website Ammyy Admin Spread Infectious Download



The official website of the remote desktop software Ammyy Admin has recently been hacked and has offered several days a contaminated version allowing users by a group of cyber criminals were spied upon. Ammyy Admin makes it possible to record on remote computers.

According to the developers make more than 50 million people, both business and private use of the software. It is used by companies in the Fortune 500, as well as banks. Also telephone scammers use the software. Some detect anti-virus programs Ammyy Admin whatsoever as unwanted software. According to the Slovak anti-virus company ESET is the remote desktop software especially popular in Russia.

On October 26 ESET discovered that on the website malware was offered. The free version of Ammyy Admin was replaced with an infected version. Until November 2 the infected version was offered. The installer installed the real Ammyy Admin software, as well as a file called AmmyyService.exe or AmmyySvc.exe that contained the malware. Then analyzed the malware existing software and websites visited.

If the computer had sufficient value was additional malware being installed. This malware was signed with a certificate from Comodo, which has been withdrawn. The malware spies on users, records all keystrokes, enumerate smart cards and communicates with a command & control server. It is unclear when the site was hacked and how long exactly malware is offered. ESET tried the developers of Ammyy Admin several days and warn in different ways, but received no response.

Tuesday, 13 October 2015

Hundreds Of SSL Certificates Issued For Phishing Sites



In one month certificate authorities have hundreds of SSL certificates issued for misleading domain names used in phishing attacks. Therefore appears inside the browser a valid lock icon, so users may think it is a legitimate page.

Reported Internet company Netcraft. This relates to, for example, certificates banskfamerica.com and blockachain.info(published by Comodo) ssl-paypai-inc.com (issued by Symantec) and paypwil.com (published by GoDaddy). Certificate Authorities must check applications for risky domains, yet know enough scammers successfully applying for an SSL certificate, according to Netcraft.

The Internet company says that users are trained to watch for the presence of the "lock" before they enter sensitive information on websites, such as passwords and credit card numbers. "A padlock alone does not indicate that the website is trustworthy or run a legitimate organization," says Graham Edgecombe Netcraft. According to the analyst, most certificates misleading domain names are issued by Comodo. Positive exceptions are DigiCert and Entrust, which no expenditure single SSL certificate for a phishing site.

Thursday, 19 March 2015

Finn Gets Microsoft SSL Certificate By Sending Email


The reason that Microsoft this week an SSL certificate for Windows Live invalidated came as a Finnish system had requested via email and received. It was revoked certificate for the domain Live.fi issued and made ​​it possible to carry out phishing and man-in-the-middle attacks. Opposite the Finnish Tivi let the guy know now how he got hold of the certificate.

When Microsoft domain Live.fi launched it was possible to register several aliases that are normally used for administrative matters. The Finnish system decided in his own words "a joke" the alias hostmaster@live.fi to create its own email address, which to his surprise, also failed. Through this alias he could then try to apply for the certificate for the domain. SSL certificates are issued by Certificate Authorities. In the case of the wrongly issued certificate for Live.fi was issued by the Certificate Authority Comodo.

Before an SSL certificate for a domain can be registered, the requesting party must prove that he or she is the owner of the domain. For this show Comodo send a confirmation email to an email address like admin @, admin @, postmaster @, hostmaster @ or webmaster @ domain for which the certificate is requested.

The Finnish system decided by the alias hostmaster@live.fi the certificate for the domain Live.fi to ask and indeed received the confirmation email in his inbox. The man, the Finnish telecoms watchdog warned the problem below, but got no help. Then he warned Microsoft, but even there it remained silent until Microsoft this week decided to withdraw the wrongly issued certificate.

Wednesday, 25 February 2015

PrivDog: Only 57,000 Users At Risk


Adware PrivDog developer has released a security update after there was a vulnerability in the software detects allowing users targeted by Man-in-the-middle attack could be. In total, this "only" 57,000 users have run risk, says the developer. However, this is not the PrivDog software that comes with the programs of security provider and Certificate Authority Comodo. PrivDog makes adware that SSL connections are intercepted and software advertisements of "reliable partners" can inject.

Researchers discovered that PrivDog install a root certificate and thus intercepted each SSL certificate of websites using a self-signed certificate, even when it comes to SSL certificates that are not valid. As a result, the browser will accept HTTPS each certificate that is, whether by a Certificate Authority (CA) is signed or not. For example, users of public Wi-Fi networks could thus be the victim of a Man-in-the-middle attack. The vulnerability is present in versions 3.0.96.0 and 3.0.97.0 PrivDog.

These versions intercept SSL traffic and were downloaded from the website of PrivDog. Contrary to what was thought yesterday is Comodo Internet Security with an earlier version of PrivDog bundled working with a browser extension and thus is not directly vulnerable to this threat. That says researcher Hanno Boeck in addition to his research. PrivDog also confirms that the PrivDogplug-in that comes with the Comodo Browsers problem has not.

Globally, more than 57,000 people have downloaded the vulnerable PrivDog versions. According adware developer made ​​sure that the problem with some sites that use a self-signed certificate no certificate warning was given. However, the encryption was offered to the end user would remain intact, says PrivDog. Tonight there is rolled out an automatic update that fixes the problem by users.

Tuesday, 24 February 2015

Privdog Software Worse Than Superfish Adware


After computer manufacturer Lenovo appears to combine security provider Comodo adware with its own software SSL traffic intercepted, only the impact is much greater than with Lenovo's Superfish was. That says researcher Hanno Bock . Comodo is known software like Comodo Internet Security and Comodo Dragon Browser. With some of the programs PrivDog-adware is included.

Like Superfish intercepted PrivDog HTTPS traffic to inject ads from "reliable partners". Late last year, the ability to filter HTTPS traffic was already on the forum Comodo discussed . The software is after Superfish scandal now in the spotlight. A user decided because Superfish a test page to do, which warns users if their HTTPS connection is manipulated. Although the user is not used Superfish he got a warning. Then this user reported on Hacker News that the possible was the PrivDog-adware.

PrivDog not have the same vulnerability as Superfish, using a weak certificate and a weak password to protect the private key of the certificate, but one which is many times as possible according to Bock. Although Superfish same certificate and key used for all installations, PrivDog makes for each installation a separate key and certificate. The biggest problem is that each certificate PrivDog intercepted and replaced by a self-signed certificate.

It is also about certificates that were not valid in the first place. As a result, the browser will accept HTTPS each certificate that is, whether by a Certificate Authority (CA) is signed or not. "We are still trying to find out the details, but it looks bad," Bock says. The researcher also finds it strange that Comodo, which is itself a CA bundle adware with their own software. "If the CA would be their job to protect HTTPS, not break," the researcher concludes.

Meanwhile warns also the CERT Coordination Center (CERT / CC) at Carnegie Mellon University for PrivDog. An attacker could according to the CERT / CC HTTPS sites spoof and intercept HTTPS traffic without users see a certificate warning.Users will also be advised to remove PrivDog. This would also be the root certificate in question to be removed.

US-CERT writes: "Adtrustmedia PrivDog is promoted by the Comodo Group, which is an organization that offers SSL certificates and authentication solutions." A variant of PrivDog that is not affected by this issue is shipped with products produced by Comodo (see below). This makes this case especially interesting because Comodo itself is a certificate authority (they had issues before). As ACLU technologist Christopher Soghoian points out on Twitter the founder of PrivDog is the CEO of Comodo. (See this blog post.)

Update/Clarification: The dangerous TLS interception behaviour is part of the latest version of PrivDog 3.0.96.0, which can be downloaded from the PrivDog webpage. Comodo Internet Security bundles an earlier version of PrivDog that works with a browser extension, so it is not directly vulnerable to this threat. According to online sources PrivDog 3.0.96.0 was released in December 2014 and changed the TLS interception technology.

Update 2: Privdog published an Advisory.