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Security Response

Showing posts in English
Symantec Security Response | 26 Feb 2013 17:40:00 GMT

Similar to Stuxnet 1.x versions, Stuxnet 0.5 has limited command-and-control (C&C) ability. In particular, Stuxnet 0.5 does not provide fine-grained control to its authors. Instead, Stuxnet 0.5 can only download new code and update itself. Stuxnet needs to spread on isolated networks and therefore has been designed to be autonomous, reducing the need to have robust and fine-grained C&C ability. Stuxnet 0.5 also uses a secondary peer-to-peer mechanism in order to propagate code updates to peers on networks inaccessible to the broader Internet.

Stuxnet 0.5 has four C&C servers, all of which are now either unavailable or have since been registered by an unrelated party.

Interestingly, Stuxnet 0.5 is programmed to stop contacting the C&C server after January 11, 2009, even though the threat is programmed to stop spreading several months later after July 4, 2009.

The C&C server domains were created in 2005 and all displayed the same front page...

Joji Hamada | 26 Feb 2013 06:07:59 GMT

Contributor: Masaki Suenaga

We have already seen a handful of zero-day vulnerabilities being exploited in the wild this year. These vulnerabilities have affected users globally leaving both individuals and organizations scrambling to protect their computers. While this does become tiring, this is not the time to rest or become complacent, especially for those using the Japanese word processor software, Ichitaro.

JustSystems has just announced a vulnerability that is currently being exploited in the wild. Symantec has seen the exploitation in the wild since mid-January, but it has been limited to users in Japan. The attacks using the exploit typically involve archive files containing the following files:

  • A clean Ichitaro document (.jtd file)
  • A modified JSMISC32.DLL file with a hidden attribute
  • A malicious DLL file with a hidden attribute and a .jtd file...
Anand Muralidharan | 25 Feb 2013 20:01:22 GMT

February is a short month, but not too short for spam events to make an impact. Valentine's Day and its associated threats has passed, so now it is time for International Women's Day—celebrated on March 8 every year. This is a great occasion to express love, respect, and kindness toward women and spammers will always attempt to take advantage of these events. The following is a spam campaign we have observed targeting International Women’s Day with a fake product promotion.

Often, spam originating from Russia will attack targets using online marketing promotions with odd phone numbers. Here, spammers targeted users by providing fake offers for great gifts for Valentine’s and International Women’s Day and also some peculiar phone numbers are provided for ordering a gift certificate.

The following is an example of the Russian spam observed by...

Symantec Security Response | 22 Feb 2013 18:18:54 GMT

Mandiant recently released a document containing indicators of compromise (IOCs) related to multiple espionage campaigns by a group known as the Comment Crew. Symantec has been actively tracking this group for six years while maintaining our own database of indicators. From our investigations we have collected thousands of indicators related to Comment Crew.

To help increase public awareness, we have decided to release hundreds of additional Comment Crew indicators to those already released. These are indicators that have been seen within the past year.

Symantec products already protect against the artifacts related to these indicators and many of these artifacts have already been shared with the security community.

You can find these indicators in the following paper:...

Hiroshi Shinotsuka | 22 Feb 2013 11:10:22 GMT

Regular readers of the Symantec blog may sometimes read blogs that mention a fraudulent file that is signed with a valid digital certificate or that an attacker signed their malware with a stolen digital certificate.

You may recall that the creators of Stuxnet, arguably the most notorious malware in history, signed it using the private keys of valid digital certificates of well-known companies.

Digital certificates are significant because a file with a digital certificate can be checked to see who authored it and to make sure it was not altered. Moreover, some versions of Windows display a dialog box when a file that has no digital signature is opened. If an attacker signs malware with the stolen private key from a digital certificate, Windows will execute the file in many cases, except if the file is downloaded from the Internet using a Web browser.

How does an...

Joji Hamada | 21 Feb 2013 16:57:15 GMT

The report, APT1: Exposing One of China's Cyber Espionage Units, published by Mandiant earlier this week has drawn worldwide attention by both the security world and the general public. This interest is due to the conclusion the report has drawn regarding the origin of targeted attacks, using advanced persistent threats (APT), performed by a certain group of attackers dubbed the Comment Crew. You can read Symantec’s response to the report here.

Today, Symantec has discovered someone performing targeted attacks is using the report as bait in an attempt to infect those who might be interested in reading it. The email we have come across is in Japanese, but this does not mean there are no emails in other languages spreading in the wild. The email purports to be from someone...

Symantec Security Response | 19 Feb 2013 22:28:02 GMT

Today Mandiant released a detailed report dubbed "APT1" which focuses on a prolific cyber espionage campaign by the Comment Crew going back to at least 2006 and targeting a broad range of industries. The report cites the earliest known public reference about APT1 infrastructure as originating from Symantec. We have detected this threat as Backdoor.Wualess since 2006 and have been actively tracking the group behind these attacks. The following Q&A briefly outlines some of the relevant Symantec information around this group:

Q: Do Symantec and Norton products protect against threats used by this group?

Yes. Symantec confirms protection for attacks associated with the Comment Crew through our antivirus and IPS signatures, as well as STAR malware...

Symantec Security Response | 14 Feb 2013 22:16:55 GMT

In a previous blog, Symantec reported on a new Adobe zero-day vulnerability (CVE-2013-0640, CVE-2013-0641) affecting Adobe Reader and Acrobat XI (11.0.1) and earlier versions, that was being actively exploited in the wild. Adobe has yet to release a patch for this zero-day, but in an advisory they have provided a means of mitigation against the attack. 

The initial report on this zero-day being actively used in the wild came from FireEye. They reported that several files were being...

Symantec Security Response | 14 Feb 2013 12:05:43 GMT

Spanish police have reported the arrest of an individual involved with a particular strain of police Ransomware known as Ransom.EY, detected by Symantec as Trojan.Ransomgerpo.

This variant is one of the earliest active police Ransomware families, which Symantec has been tracking since at least July, 2011. The Trojan was distributed using drive by download techniques, in conjunction with the Black Hole exploit kit. Early versions of the locking screen were quite primitive but quickly evolved as the author obviously stole design ideas from other Ransomware gangs as shown in Figure 1.

...

Symantec Security Response | 14 Feb 2013 08:59:53 GMT

Adobe posted a vulnerability report warning that vulnerabilities in Adobe Reader and Acrobat XI (11.0.1) and earlier versions are being exploited in the wild. Adobe is currently investigating this issue.

 

According to the FireEye blog posted earlier today, the malicious file arrives as a PDF file. Upon successful exploitation of the vulnerabilities, two malicious DLL files are dropped.

Symantec detects the malicious PDF file as Trojan.Pidief and the two dropped DLL files as...