The SnapChat smart phone app is one of the newest crazes for teens because it allows a user to send what they believe to be a very private and very temporary photo to another user (and if you use it just for fun with friends, it can be a blast). Because SnapChat (seen below, yellow icon) Read more…
寄稿: Lionel Payet
今年 6 月、シマンテックはユーザーの Android 端末を乗っ取って身代金を請求する悪質な Android アプリを発見しました。この発見で、ランサムウェアが携帯デバイスなどの新しいプラットフォームにも出現するだろうという以前の予測が的中したことになります。
プレエンプティブな SMS スパムドメイン識別の一環として、シマンテックは最近登録されたばかりのドメインを検出しました。このドメインが、ランサムウェアのソーシャルエンジニアリングを利用する新しい偽ウイルス対策ソフトウェアの Android 版を送り出しています。また別の手がかりから、このアプリは Android.Fakedefender の背後にいるのと同じ作成者に関係している、またはその作成者から発信されていると考えられています。Android.Fakedefender については、去る 6 月にこのブログでもお伝えしました。デザインが新しくなり、身代金の支払い方法も変化していますが、今回の新しい亜種のパッケージファイルには今も古い画像が含まれています。新旧どちらのバージョンも、標的は主としてロシア語圏のユーザーです。
この亜種の感染経路はまだ判明していませんが、悪質なドメインへのリンクを記載したスパムが使われているものとシマンテックは見ています。
図 1. 最近登録されたばかりのドメインから悪質な Android アプリが送信される
この悪質なアプリの背後にいる作成者は、サードパーティの未知のソースから Android アプリをインストールさせようとします。
シマンテックは、この悪質なアプリを Android.Fakedefender.B として検出します。Android.Fakedefender.B は、アダルトビデオサイトの公式アプリケーションに偽装しており、ソーシャルエンジニアリングに引っかかってアプリをインストールしたユーザーは、Android デバイスからロックアウトされてしまいます。
インストールすると警告メッセージが表示され、ユーザーはアプリの全機能を使う前にウイルススキャンを実行するよう促されます。
このマルウェアの旧バージョンは、Android Defender アプリに偽装していましたが、今回のバージョンが偽装しているのは、ウイルス対策ソフトウェアとして知られる Avast です。ウイルススキャンが完了すると、デバイスが別の脅威やウイルスに感染していると思い込ませ、保護のためにデバイスをロックすると通知してきます。
今回の亜種で、作成者がランサムウェアの支払い方法として使っているのは MoneyPak で、デバイスのロックを解除するには 100 米ドルが必要です。以前のバージョンでは、ロック解除の引き換え条件としてユーザーのクレジットカード番号が求められていました。Web マネーは、Windows プラットフォームで偽ウイルス対策ソフトウェアやランサムウェアに好んで用いられる手段であり、何年も前から使われています。被害を受けたユーザーから見ると、直接クレジットカード情報を渡すより、いずれかの Web 決済会社を介した支払いのほうが、正規で安全という印象があるようです。
図 2. 偽のウイルス対策アプリ
Windows システム上の偽ウイルス対策ソフトウェアやランサムウェア何年も前から成功しており、新しい手口と設計を身に着けて進化し続けています。Android 版のモバイルマルウェアも同じような進化の道をたどり、ユーザーを欺いて身代金を払わせるために、新しい手口を備えるようになると、シマンテックは予測してきました。
現時点で、Android.FakeDefender.B は被害者が感染を除去できないようにする目的で悪用を組み込んではいません。これまでには、Android.Obad のように他の Android マルウェアが、密かにデバイスの管理者権限を利用してマルウェアの除去を難しくする例が確認されていました。Android.FakeDefender.B の作成者は、ソーシャルエンジニアリングと、連続ポップアップのような簡単な手口を利用して被害者から金銭を詐取しようとします。Android.FakeDefender.B に感染しても、Android デバイスのアプリケーションの管理機能を使えばマルウェアはアンインストールできます。
そもそもの感染を防ぐためには、ノートン モバイルセキュリティや Symantec Mobile Security などのセキュリティアプリのインストールをお勧めします。信頼できるアプリマーケットからダウンロードしたアプリのみをインストールするようにすれば、悪質なアプリは回避できます。スマートフォンとタブレットの安全性に関する一般的なヒントは、モバイルセキュリティの Web サイト（英語）にアクセスしてください。
* 日本語版セキュリティレスポンスブログの RSS フィードを購読するには、http://www.symantec.com/connect/ja/item-feeds/blog/2261/feed/all/ja にアクセスしてください。
If you have any SSL certificates with less than 2048-bit keys, now is the time to upgrade. Why? Because the Certification Authority/Browser (CA/B) Forum and the National Institute of Standards and Technology have determined that any key length below 20…
AVAST virus lab analyst Filip Chytrý has discovered a fake Android Antivirus application impersonating avast! Free Mobile Security. The malicious application called com.avastmenow has a user interface that looks very similar to the genuine one by AVAST Software. After the installation of the fake program, an icon with the text of PornHub is displayed to users. […]
There have been over 50 million downloads of avast! Mobile Security from Google Play since it was released last year. Android users are becoming more aware of the security and theft issues surrounding their mobile devices, and putting their trust in AVAST. A few weeks ago, avast! Mobile Premium was introduced providing superior back-up and […]
Contributor: Lionel Payet
Back in June we discovered a malicious Android application that was holding user’s Android phones for ransom. This discovery confirmed earlier predictions that ransomware would evolve and arise on new platforms, such as …
Hello, welcome to this month’s blog on the Microsoft patch release. This month the vendor is releasing thirteen bulletins covering a total of 47 vulnerabilities. Thirteen of this month’s issues are rated ’Critical’.
As always, customers are advised to follow these security best practices:
Microsoft’s summary of the September releases can be found here:
http://technet.microsoft.com/en-us/security/bulletin/ms13-Sep
The following is a breakdown of the issues being addressed this month:
MS13-068 Vulnerability in Microsoft Outlook Could Allow Remote Code Execution (2756473)
Message Certificate Vulnerability (CVE-2013-3870) MS Rating: Critical
A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially crafted S/MIME email messages. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
MS13-069 Cumulative Security Update for Internet Explorer (2870699)
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3201) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3202) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3203) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3204) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3205) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3206) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3207) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3208) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3209) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2013-3845) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
MS13-067 Vulnerabilities in Microsoft SharePoint Server Could Allow Remote Code Execution (2834052)
SharePoint Denial of Service Vulnerability (CVE-2013-0081) MS Rating: Important
A denial of service vulnerability exists in Microsoft SharePoint Server. An attacker who successfully exploited this vulnerability could cause the W3WP process on an affected version of SharePoint Server to stop responding, causing the SharePoint site, and any other sites running under that process, to become unavailable until the process is restarted.
MAC Disabled Vulnerability (CVE-2013-1330) MS Rating: Critical
A remote code execution vulnerability exists in the way SharePoint Server handles unassigned workflows. An attacker who successfully exploited this vulnerability could run arbitrary code in the context of the W3WP service account.
SharePoint XSS Vulnerability (CVE-2013-3179) MS Rating: Important
An elevation of privilege exists in Microsoft SharePoint Server. An attacker who successfully exploited this vulnerability could allow an attacker to perform cross-site scripting attacks and run script in the security context of the logged-on user.
POST XSS Vulnerability (CVE-2013-3180) MS Rating: Important
An elevation of privilege exists in Microsoft SharePoint Server. An attacker who successfully exploited this vulnerability could allow an attacker to perform cross-site scripting attacks and run script in the security context of the logged-on user.
MS13-072 Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2845537)
XML External Entities Resolution Vulnerability (CVE-2013-3160) MS Rating: Important
An information disclosure vulnerability exists in the way that Microsoft Word parses specially crafted XML files containing external entities.
Word Memory Corruption Vulnerability (CVE-2013-3847) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3848) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3849) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3850) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3851) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3852) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3853) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3854) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3855) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3856) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3857) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
Word Memory Corruption Vulnerability (CVE-2013-3858) MS Rating: Important
A remote code execution vulnerability exists in the way that affected Microsoft Office software parses specially crafted files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
MS13-074 Vulnerabilities in Microsoft Access Could Allow Remote Code Execution (2848637)
Access Memory Corruption Vulnerability (CVE-2013-3155) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Access parses content in Access files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Access Memory Corruption Vulnerability (CVE-2013-3156) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Access parses content in Access files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Access Memory Corruption Vulnerability (CVE-2013-3157) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Access parses content in Access files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
MS13-073 Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2858300)
Microsoft Office Memory Corruption Vulnerability (CVE-2013-1315) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Excel parses content in Excel files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Microsoft Office Memory Corruption Vulnerability (CVE-2013-3158) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Excel parses content in Excel files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
XML External Entities Resolution Vulnerability (CVE-2013-3159) MS Rating: Important
An information disclosure vulnerability exists in the way that Microsoft Excel parses specially crafted XML files containing external entities.
MS13-071 Vulnerability in Windows Theme File Could Allow Remote Code Execution (2864063)
Windows Theme File Remote Code Execution Vulnerability (CVE-2013-0810) MS Rating: Important
A remote code execution vulnerability exists in the way Windows handles certain specially crafted Windows theme files. This vulnerability could allow an attacker to execute arbitrary code if the attacker convinces a user to apply a specially crafted Windows theme. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
MS13-077 Vulnerability in Windows Service Control Manager Could Allow Elevation of Privilege (2872339)
Service Control Manager Double Free Vulnerability (CVE-2013-3862) MS Rating: Important
A vulnerability exists in the way that the Windows Service Control Manager (SCM) handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code and take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
MS13-070 Vulnerability in OLE Could Allow Remote Code Execution (2876217)
OLE Property Vulnerability (CVE-2013-3863) MS Rating: Important
A vulnerability exists in OLE that could lead to remote code execution if a user opens a file that contains a specially crafted OLE object. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
MS13-078 Vulnerability in FrontPage Could Allow Information Disclosure (2825621)
XML Disclosure Vulnerability (CVE-2013-3137) MS Rating: Important
An information disclosure vulnerability exists in FrontPage that could allow an attacker to disclose the contents of a file on a target system.
MS13-075 Vulnerability in Microsoft Office IME (Chinese) Could Allow Elevation of Privilege (2878687)
Chinese IME Vulnerability (CVE-2013-3859) MS Rating: Important
An elevation of privilege vulnerability exists in Office IME (Chinese) that could allow a low-privilege user to elevate their privileges.
MS13-076 Vulnerabilities in Kernel-Mode Drivers Could Allow Elevation of Privilege (2876315)
Win32k Multiple Fetch Vulnerability (CVE-2013-1341) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Multiple Fetch Vulnerability (CVE-2013-1342) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Multiple Fetch Vulnerability (CVE-2013-1343) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Multiple Fetch Vulnerability (CVE-2013-1344) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Multiple Fetch Vulnerability (CVE-2013-3864) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Multiple Fetch Vulnerability (CVE-2013-3865) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
Win32k Elevation of Privilege Vulnerability (CVE-2013-3866) MS Rating: Important
An elevation of privilege vulnerability exists when the Windows kernel-mode driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could gain elevated privileges and read arbitrary amounts of kernel memory.
MS13-079 Vulnerability in Active Directory Could Allow Denial of Service (2853587)
Remote Anonymous DoS Vulnerability (CVE-2013-3868) MS Rating: Important
A denial of service vulnerability exists in implementations of Active Directory that could cause the service to stop responding until an administrator restarts the service. The vulnerability is caused when the LDAP service fails to handle a specially crafted query.
More information on the vulnerabilities being addressed this month is available at Symantec’s free SecurityFocus portal and to our customers through the DeepSight Threat Management System.
Yes! What a lucky day! I’ve just got a message that I won 2,000,000.00 British Pounds (2.4M EUR/3.1M USD), an Apple laptop, a T-shirt, and a cap emblazoned with a logo of The Free Lotto Company. Pretty awesome you might think, but appearances are deceptive. Unfortunately, this is just one of the ways bad guys […]
Encryption is the science of encoding and decoding secret messages. It began as cryptography—the ancient Greeks used it to protect sensitive information that might fall into the hands of their enemies. More recently, governments have used encryption for military purposes, but these days the term if often used in reference to online security. Encryption is Read more…