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Security Response

Showing posts tagged with Security Response remove filter
Showing posts by Téo Adams remove filter
Téo Adams | 04 Apr 2011 | 0 comments

シマンテックの『インターネットセキュリティ脅威レポート Volume 16』が公開されました。今年のレポートでは、いくつかの新しい計測値を追加し、従来の計測値を修正したほか、フォーマットを改訂するなど、いくつか大きな変更があります。新しいフォーマットの一端は、今年のはじめにリリースした『Report on Attack Kits and Malicious Websites(攻撃ツールキットと悪質な Web サイトに関するレポート)』で最初にご覧いただきました。

この最新レポートで注目すべき点のひとつに、リムーバブルメディア上の悪質な実行可能ファイルの共有を介して悪質なコードを拡散する手口が今でも流行していることが挙げられます。この拡散方法は、現在に至るまでかなり長期にわたってトップの座を占めており、いっこうに衰える気配がありません。ただし、ちょうどこのレポートの執筆中であった 2011 年 2 月には、Microsoft 社から、この拡散方法に広く利用されている自動再生機能を更新したため、悪用は大幅に抑えられるだろうという発表がありました。この更新によって自動再生機能は CD メディアと DVD メディアに限定されるため、この更新をユーザーが適用すれば、SillyFDC や...

Téo Adams | 04 Apr 2011 | 0 comments

We are pleased to announce that Volume 16 of the Symantec Internet Security Threat Report (ISTR) is now available. There are some significant changes to the report this year, including several new metrics, a revamping of existing metrics, and a revised format. Aspects of the new format were first seen in the Report on Attack Kits and Malicious Websites, which was released earlier this year.

One point of interest in this most recent report is the continued prevalence of malicious code propagation through the sharing of malicious executables on removable media. This propagation mechanism has been ranked at the top for quite some time now, with no signs of coming down. However, in February 2011, right in midst of writing the report, we read an...

Téo Adams | 15 Feb 2011 | 0 comments

最近盛んに議論されている標的型攻撃は、その名前が示すとおり、特定の個人や組織、企業、部門に向けて行われるサイバー攻撃です。『Symantec Intelligence Quarterly Report: October - December 2010(シマンテックインテリジェンス四半期レポート: 2010 年 10 月~ 12 月)』では、標的型攻撃の中でも、特に重要インフラに対するものを中心テーマとして取り上げています。

攻撃者はますます悪賢くなり、標的を研究して、攻撃を正規なものに見せかけようとしています。カスタマイズされた標的型攻撃は、標的のグループに影響を与えることを明確な目的として作成されている点で、他の攻撃よりも危険なものとなります。このようなカスタマイズされた攻撃を行う動機は、機密情報を盗み出して利益を得ることのほか、日常業務の妨害、さらには単なるいたずらまでさまざまです。このところ最もよく目にする標的型攻撃として Hydraq、Stuxnet、Night Dragon があります。

標的型攻撃

Hydraq(別名 Aurora)が初めて見つかり、企業ネットワークにアクセスして機密情報を盗み出すことが目的と思われる標的型攻撃の一部として使われたのは、今からちょうど 1 年前のことです。Hydraq は、電子メールの添付ファイルを経由してコンピュータに侵入したり、悪意のある Web サイトなどのその他の脅威によってダウンロードされたりします。Hydraq が実行されると、トロイの木馬によってバックドアがインストールされ、攻撃者はコンピュータを制御して、さまざまな行為を実行できるようになります。たとえば、ファイルの改ざん、実行、削除、悪意のあるファイルの実行のほか、最も深刻なものとして、侵入先の企業ネットワークにアクセスして、標的にさらなる攻撃を加えることが挙げられます。

昨年 7 月に注目を集めた Stuxnet は...

Téo Adams | 14 Feb 2011 | 0 comments

There’s been lots of discussion lately on targeted attacks which are, as the name implies, cyberattacks directed at specific individuals, organizations, corporations, or sectors. These targeted attacks, particularly on critical infrastructure, are the focus of our Symantec Intelligence Quarterly Report: October – December 2010.

Attackers are getting smart and researching their target so that the attacks appear legitimate. The customization of targeted attacks can make them more dangerous than non-targeted attacks because they are tailored explicitly to affect a target group. Motivations for such customized attacks can range from stealing confidential information for profit, to interfering with day-to-day operations, to mischief. The most prominent recent targeted attacks are Hydraq, Stuxnet, and Night Dragon.

Targeted Attacks

It has been just one year since Hydraq, a.k.a Aurora, was first discovered and used as part of a targeted...

Téo Adams | 18 Jan 2011 | 0 comments

検索結果と悪質な Web サイト

コンピュータのセキュリティ管理が非常に甘いユーザーや、Web 上の攻撃の標的になる可能性を一笑に付すようなユーザーに話を聞くと、その多くが「危ないものは検索しないから」とか「知らないサイトにはアクセスしないから」という理由を口にします。こうした態度を見聞きするたびに私は実に歯がゆい思いを抱き、このようなユーザーの啓蒙に使える情報が少しでもないものかと探したくなります。最近シマンテックが発表した「Report on Attack Kits and Malicious Websites (攻撃ツールキットと悪質な Web サイトに関するレポート)」で私が取り組んだ関連データの解析結果に特に関心を持ったのも、そのためです。

このレポートで私たちが利用したある調査では、Web 検索のキーワードと、各キーワードを使うことでユーザーが悪質な Web サイトに誘導されてしまった回数を調べました。検索キーワードは任意に選出され、「良い」語句も「悪い」語句もありました。つまり、Web で誰もが検索しそうな言葉だということです。詳しく調べるために、悪質な Web サイトがヒットした回数に基づいて、上位 100 個のキーワードを選出しました。

検索キーワードの種類に基づく悪質な Web サイトの比率

この解析で得られたデータの中に、意外な結果ではないものの特に注目に値する結果があります。上位 100 個の検索キーワードのうち、74 個は正規のドメイン名に固有のものだったのです。ということは、正規の Web サイトを名前で検索したユーザーが、いつの間にか悪質な Web...

Téo Adams | 18 Jan 2011 | 0 comments

Search results and malicious websites

Among the many excuses I’ve heard from people who take computer security too lightly, or who brush off the likelihood of being targeted by Web attacks, are comments such as “I don’t search for anything bad,” or “I only visit sites I know.” I find this sort of attitude very frustrating, if not amusing, and I like coming across bits of information that I can use to educate these people. So, I was especially interested in the results of some related data analysis that I worked on for on the recently released Symantec Report on Attack Kits and Malicious Websites.

One of the metrics we use in the report examines Web search terms and the number of times the use of each search term resulted in a user visiting a malicious website. The range of search terms was unrestricted and consisted of both...

Téo Adams | 20 Apr 2010 | 0 comments

Ranks and podium finishes are no doubt one of the key highlights of the recently concluded 2010 Olympic winter games. Likewise, rankings are an aspect of many metrics used for analysis in the Symantec Global Internet Security Threat Report and there was a somewhat surprising change in the top ranks of malicious activity by country in 2009.

Beginning in 2006, Symantec began measuring, analyzing, and reporting the amount of malicious activity occurring in, or originating from, countries around the globe. In every report since, the top three countries have been the United States, China, and Germany. Although the country ranking below the top three has changed every year—with, in some cases, the amount of their malicious activity increasing significantly—there was little indication that the top three countries would change.

That said, previous editions of the report have observed and discussed indications that emerging countries such as India, Russia...

Téo Adams | 19 Oct 2009 | 0 comments

Given their financial motivations, the distributors of rogue security software scams need to affect a broad number of potential victims. Getting the program onto a victim’s computer is a critical step in rogue security software scams and the scammers use a variety of techniques to do so. While some rogue security software programs rely on just a few specific techniques to achieve this, many of them incorporate multiple techniques to improve the odds of success. The distribution techniques for rogue security software programs can be simplified into two groups: installation methods and advertising methods.

The installation methods for rogue security software can either be intentional or unintentional. Scammers who persuade victims that they need the rogue software to address security concerns lure the victims into downloading the software intentionally. This is a common approach to rogue security software installation that was used by 93 percent of the top rogue security...

Téo Adams | 15 Apr 2009 | 0 comments

A driving force behind the growing speed and efficiency of malicious code development is the demand for goods and services that facilitate online fraud. This is demonstrated by the flourishing profitability of confidential information sales in the online underground economy. For example, one person who was arrested for computer related credit card fraud in 2008 had possession of a condominium, a luxury vehicle, and over 1.6 million dollars in cash, among other valuable goods. All of which were presumably obtained by fraudulent means.

Malicious code that exposes confidential information is of particular value because the information is critical to several illegal practices, such as identity theft and credit card fraud. In many instances, well-organized programmers are developing this code on a large scale, much as how development occurs in a legitimate software enterprise. The confidential information obtained by the malicious code is then used for fraud or advertised for...

Téo Adams | 01 Apr 2009 | 0 comments

I had a great time at CanSecWest 2009. There were some great speakers, the food was excellent, and the venue was pretty classy. One of the talks that stood out for me discussed using the BIOS as a means to persistently maintain control of a computer.

To my knowledge, this wasn’t the first time that the BIOS has been used by malicious code, but it is the first time that using the BIOS to fully contain and store said malicious code has been presented. By modifying the BIOS to store malicious code and install it on a local drive or device, an attacker can continually maintain control of a computer regardless of operating system reinstallations, physical change to hard drives, or other seemingly “sure fire” methods of system sanitization. This means that regardless of changes to devices or hardware, the computer remains at risk as long as the BIOS is not flashed with a “clean” image.

The...