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Security Response

Showing posts tagged with Security remove filter
Livian Ge | 31 May 2009 | 0 comments

    即时聊天工具(IM)如今越来越广泛地被大家所采用,其功能也日趋复杂多样。除了最基本的聊天功能,博客,网络相册,网络游戏等也被纳入其中。信息共享和管理变得更加容易,甚至连银行理财等传统行业的业务也可以在网上实现,极大丰富了我们的网络生活。

 

    然而,大家在享受高科技带来的便利之余,也切忌不能掉以轻心。一些心怀不轨的“黑客”可能正在对您的个人信息虎视眈眈着,尤其是可以带来直接经济效益的信息—网络账号便是他们的目标之一。

 

    近期爆出的某IM软件信息丢失事件再次为我们敲响了警钟。有网民尝试在搜索引擎中输入一组“[IM名称]密码文件 filetype:txt”之类的关键词,发现了大量包含被盗账户信息文件下载的搜索结果。经尝试,部分帐号和密码确实有效,不仅能够顺利登陆,而且被盗用户名下的网络相册、博客内容也可以一览无遗。

 

    攻击者为何会如此“高调”地展示他们的“黑客”成果?这些被盗的账号和密码为什么会出现在网上供人随意下载?初步分析显示,当攻击者利用木马盗取账户信息以后,他们通常会将含有账户登录名和密码的txt文件保存在某个FTP服务器上,或通过email发送。然而,有些攻击者可能将这些FTP服务器的访问权限设置得很低,甚至忘记设置访问权限,因此搜索引擎能够抓取这些页面,令页面包含的信息也一并公开,而这些信息自然就可以被公众所浏览和下载。

 

    盗取IM帐号的木马有很多种,这里我们以其中一个木马为例,给大家演示一下它是如何“得逞”的:

 

    首先,木马利用正版IM软件图标以假乱真,伪装进入受感染的计算机。当用户运行假冒的IM程序后,该程序会在计算机桌面上创建一个同真正的IM完全一样的快捷方式,包括图标和名称。同时跳出的伪造的IM登陆窗口会提示用户输入登陆信息。该窗口也同真正的IM登陆窗口一模一样,不过只有“账号”、“密码”、“登陆”这几个信息栏或按钮被激活,其他的诸如“申请账户”、“忘了密码?”、“查杀木马”等键都无法点开。这显然同攻击者的目的非常吻合—他们只需要盗取用户的账号和密码,并利用“登陆”键激活被盗信息的传输,其他的按键只是为了令登陆窗口看起来更逼真而已。...

Mayur Kulkarni | 29 May 2009 | 0 comments

Stock markets all over the world are seeing a downturn due to the current economy. The Indian markets were no exception to this trend until the Indian election results were declared. Political experts predicted that there would be a fractured mandate; however, the India Election 2009 resulted in a single party winning a majority of the seats. This means that the Indian population can now expect a stable government. This event set such a positive mood in the Indian stock market that it went up nearly 15 percent within seconds of opening on Monday, May 18, 2009. Taking into account that people may try to invest during this period, spammers are sending messages, discussing profits on investments based on their bogus tips.

These spammers claim to be the only research firm in India that delivers 100 percent accurate results. They also state that more than 5,500 people across India earned profits from their stock tips. They have been delivering a profitability ratio of 85 percent...

Mayur Kulkarni | 28 May 2009 | 0 comments

In our earlier blog on online fraud, we explained how HTML attachments are used in phishing attacks. We also mentioned how the attached files were named in order to mislead users. For example:

 

Account reset form.pdf.htm
Bank-Account confirmation form.pdf.htm

These filenames may confuse the recipients and trick them into submitting sensitive banking information through the HTML file. Recently

 

we have come across similar messages that use the same technique, this time for harvesting email addresses. These messages mention the falling sales of a major auto company due to the economic recession. It further states that the government plans to bail them out, but the actual funds have yet to reach the auto company. So, they are offering the sale of...

Security Response China | 26 May 2009 | 0 comments

Instant messaging (IM) applications are widely used nowadays, and while more and more people use them, they’ve also become increasingly feature heavy. Besides the original chat function, IM applications have also integrated other useful features such as blogging, photo albums, online games, etc. More functions enhance the user’s Internet surfing experience, help people to share information and thoughts, and even allow users to manage their assets online.

While people are enjoying the convenience brought by advanced technologies and services, hackers are also aiming at the information that people are increasingly putting on the Internet, especially when the information is profitable. Online account information is definitely one of them.

A recent security event is a warning to us all. It was discovered that people’s IM account information is available online by searching keywords such as “[IM USERNAME] password txt filetype:txt.” Hundreds...

Mayur Kulkarni | 26 May 2009 | 0 comments

The latest figures from the World Health Organization (WHO) say that there are at least 170 million diabetic patients worldwide, and that number will double by the year 2030. The chronic nature of diabetes means that these patients constantly need to control their blood sugar level using medicines. Along with medicines, lab tests are necessary to check on the disease that will become part of a patient’s routine life. With the ongoing financial crisis affecting all walks of life, recurring expenditures on medical care can be costly for an individual and his or her family. Obviously these patients will look for discounts or offers to help them through their situation.

Online medical suppliers provide varying discounts or offers, one being a free glucose meter to visitors placing a supply order. Spammers have also read the picture well and are providing the same offer...

Zulfikar Ramzan | 22 May 2009 | 0 comments

While many forms of online mischief require some degree of technical sophistication on the part of the miscreant, we often see forms of attack that are quite simple. One case in point is the phishing attack. In many ways, phishing attacks are at the low end of the totem pole from a technical sophistication standpoint. In fact, ready-made phishing kits can be purchased in the underground economy (though the buyer should beware!), and many aspects of the attack can effectively be outsourced.
 
For a while, banking and other financial services sites bore the brunt of the phishers’ attention spans. It’s not surprising. Phishing is a financially motivated crime, so to understand the modus operandi of a phisher, all you have to do is follow the money. During the last year and a half or so we have noticed an interesting trend, in that social networking sites have become a much more popular target for phishers.
 
In some cases, social networking...

Samir Patil | 21 May 2009 | 0 comments

Spammers habitually exploit the reputations of brands for their benefit. As more and more people become connected through social networking sites, it is no surprise that the trust and reputation earned by these websites is misused by spammers. We are monitoring spam attacks this week that try to take advantage of the burgeoning social networking brand Twitter for two spam campaigns: make money fast (MMF) and dating spam.

In the MMF attack, a URL is provided to order a “Risk-Free Twitter Profit Software” kit. When the user clicks on the URL in the promotional email, he or she is redirected to a Web-form that asks for personal information such as name, email, and address. This is followed by another form asking for your credit card number, expiration date, and security code.

Below are some of the subject lines used in this latest MMF spam:

 

Subject: Twitter Guru Reveals All On Video
Subject: Use Twitter to...

Samir Patil | 21 May 2009 | 0 comments

Spammers have declared open season on Memorial Day. Observed in the United States on the last Monday of May, Memorial Day memorializes those men and women who lost their lives in American military service. This year, it will celebrated on May 25.

Memorial Day spam made its appearance early last week. These emails mainly contained health-related spam and offers selling Memorial Day flags. Health-related spam has URLs that lead users to open online pharmacy stores. Spam emails linked to Memorial Day flags claim to offer the free home delivery of discounted rate flags. A few other spam samples have injected legitimate news articles related to Memorial Day in the email body as an attempt at obfuscation.

 

 

The following are a few of the subject lines used in the Memorial Day spam...

Vivian Ho | 20 May 2009 | 0 comments

In the last couple of months we’ve seen medical image spam offers resurfacing with regularity. Image spam advertising meds is easy to recognize, with a prominent med promotion image in the body. The subject lines advertise the products’ effectiveness and include noise added in the image attachment to attempt to bypass antispam filters. These are old techniques that are still common in med spam.

Spammers are also developing new tactics to attract visitors. They attempt to play mind tricks on the spam recipients, using warnings that are similar to what might be received from a system admin and personal greetings in subject lines—both attempts to lower recipients’ awareness in order to get their messages read.

We’ve recently observed a round of med spam that is sent in ordinary e-postcard form. In these messages we see that the spammers are using warning-style subject lines in order to try to dupe recipients into thinking they are violating...

John H | 19 May 2009 | 0 comments

The malicious code Whac-a-Mole game continues. Just as security vendors start detecting the domains and malware associated with the drive-by download attacks coming from the malicious Gumblar domains, the bad guys are changing the game and popping up from Martuz dot cn, which, according to Who.is, is located in the UK with a 95.129.x.x IP Address. The JavaScript appearing on the websites has also become more obfuscated, making the attacks slightly harder for IT managers and Web administrators to detect. The attackers are easily able to change the obfuscation by substituting portions of the domain name with variables instead of spelling out the domain all at once. The updated malicious JavaScript also performs a test to deliver a different payload for users of Google Chrome browsers, since Chrome has a blacklist of suspicious and malicious domains.

The drive-by download tries to exploit a number of underlying vulnerabilities, including some...