The iOS app store has traditionally been viewed as a safe source of apps, thanks to Apple’s policing of its walled garden. However, that is no longer completely the case, thanks to the discovery of multiple legitimate apps in the iOS app store that contained malicious code, which was dubbed XcodeGhost.

So, how did XcodeGhost happen? Xcode (Apple’s toolkit for developing on their various platforms) has been a challenge for Chinese developers to download from official sources because of its size (multiple gigabytes) and the slow connection speed to Apple’s servers. (For Chinese users, access to sites within China is much faster than sites outside the country.) As a result, many Chinese iOS app developers did not download Xcode from official sources. Instead, they resorted to downloading copies that were hosted on local file-sharing sites and posted in various online forums:

Figure 1. Forum post advertising Xcode copies

Unfortunately, these copies added a new CoreService development framework to replace the original which contained malicious code. As result, every app built with these tools contained the malicious code. The screenshots below show how a malicious URL was added into the code, which would be accessed by the apps created with the malicious tools. The first screenshot is from a modified version of Xcode 6.2; the other is from a modified version of 6.4. The modified version of 6.4 attempts to hide the malicious URL in order to confuse researchers and security software. (The latest version offered for download by Apple is Xcode 7, with a beta for 7.1 available as well.) Coolcat casino com.

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Figure 2. Modified version of Xcode 6.2

Figure 3. Modified version of Xcode 6.4

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Infected Apps

Here are some of the apps which include the XcodeGhost code. However, due to the widespread use of these copies of Xcode downloaded from other sources, other apps may be affected as well. Do take note that the apps in bold text can still be found in the app store.

Pushing Apps

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Faced with pressure, the XcodeGhost author has since released a letter of apology, along with the source code. Looking into the code, we found that aside from leaking information, the code can remotely push apps. Victims will be directed to the designated app in the app store. In addition, XcodeGhost can also be used to send notifications to the user, which can be used for malicious purposes such as fraud and phishing.

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Figure 4. Snippet of released source code

Affected Countries and Regions

Based on our monitoring, we found that China is the most affected country. However, the North American region was also hit hard by XcodeGhost. This isn’t that surprising, considering that several apps that are known to have been infected are available outside of China.

Figure 5. Affected countries

Trend Micro detects apps that contain this malicious code as IOS_XcodeGhost.A.

Update as of September 24, 2015, 12:00 P.M. PDT (UTC-7)

In addition to Xcode, we also observed that the Unity library in iOS has also been infected by malicious code named UnityGhost. Unity is a third-party development platform for creating 2D and 3D multiplatform games. The platform is not only used in iOS devices, but on Android, Windows, and Mac OS X systems as well. Consoles like Playstation, and Xbox may also be affected.

In this scenario, the library, libiPhone-lib-il2cpp.a-armv7-master.o was infected with the same tactics, but is connected with different command and control (C&C) servers.

Figure 6: UnityGhost has the same tactics seen in XcodeGhost (seen in Figure 2) but with a different C&C server

As of this writing we have not been able to find apps infected by UnityGhost on any other platform, including Android.

The Unity platform costs a hefty $75 a month for the professional version, which may have prompted cybercriminals to scour through forums in order to download cracked versions. The screenshot below shows that the cracked version is being distributed by the same XcodeGhost author.

Figure 7: Cracked versions of Unity are being distributed by the XcodeGhost author

Hat tip goes out to the Alibaba Mobile Security Team for sharing the UnityGhost sample.

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A serious security flaw .. is affecting Apple Mac OS computers.Source:Supplied

A SERIOUS security flaw patched for iPads and iPhones last week continues to affect Mac OS computers, with no comment on when we’ll see a solution.

Apple last week released a minor point upgrade to the iOS operating system, bringing it to iOS 7.0.6.

The key feature of that upgrade was to resolve an issue in the way that iOS devices talked to secure servers.

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An error in the underlying code made it feasible for rogue elements on public networks to imitate supposedly secure sites and capture personal or banking information by appearing to be the legitimate article.

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As such, if you have an iOS device and you use public networks, such as those found in libraries or coffee shops, it would be extremely wise to apply the upgrade immediately.

There’s no indication that serious security breaches have occurred, but now that the error is common knowledge, it’s fair to assume that exploits will be brewing.

The error also affects Apple’s Mac OS computer line, but here matters are murkier. Apple is known to be working on a fix, but quite when it will be rolled out to end users remains a mystery. Statera mac os.

An Apple Australia spokesman officially had “no comment” when asked by News Corp Australia about an upcoming fix, although website AppleInsider suggests that it may wait until the next point release of OS X, the timing for which remains unknown. Casino im internet. Until such time as a fix is available, Mac OS users are advised to limit secure sessions on public networks.

Security technologist Runa Sandvisk has created the website “Has GoTo Fail Been Fixed Yet?”. Click on it now and you’ll get “No” in big letters, plus an explanation of the problem.