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Tuesday, 09 April 2019 06:29

Lookout team finds iOS version of powerful Exodus spyware

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Lookout team finds iOS version of powerful Exodus spyware Image by Matias Cruz from Pixabay

Researchers from the security firm Lookout have found a version of the Exodus spyware that runs on iOS, with indications that it is made available through phishing sites that imitate mobile carriers from Italy and Turkmenistan.

In a blog post, the Lookout researchers said they had found the original Exodus version, that targeted Android, early last year. The group Security Without Borders recently wrote a detailed blog post about Exodus. The Lookout post was shared with iTWire prior to its publication.

The Lookout team said the Android version of Exodus appeared to have been created for the market in lawful interception, had been under development for at least five years and had three stages.

The first was a small dropper, followed by a second-stage payload that included a number of binaries. The third stage used the DirtyCOW exploit to gain root status.

Analysis of the Android samples led the team to the iOS port which distrubuted by abusing Apple's enterprise provisioning system.

"The Apple Developer Enterprise program is intended to allow organisations to distribute proprietary, in-­house apps to their employees without needing to use the iOS App Store," Lookout said. "A business can obtain access to this program only provided they meet requirements set out by Apple. It is not common to use this program to distribute malware, although there have been past cases where malware authors have done so."

The phishing sites that Lookout found had links to a distribution manifest containing metadata like the application name, version, icon and a link to the IPA file. The IPA package needs a certificate to be distributed outside the App Store and certificates from the company Connexxa were used.

Connexxa was earlier found to be the employer of the unnamed engineer who had created Exodus for Android. This individual worked for eSurv, a business unit of Connexxa.

The apps for iOS masqueraded as carrier assistance apps which told the user to “keep the app installed on your device and stay under Wi­-Fi coverage to be contacted by one of our operators”.

The Lookout team said the iOS variant of Exodus was not as powerful as the Android one. But it could exfiltrate the following data: contacts, audio recordings, photos, videos, GPS location and device information. It could also carry out remote audio recording.

Lookout said the uploaded data was transmitted through HTTP PUT requests to an endpoint on the command and control server. Push notifications were used to control the remote audio recording.

"Lookout has shared information about this family with Apple, and they have revoked the affected certificates," the researchers wrote. "As a result, no new instances of this app can be installed on iOS devices and existing installations can no longer be run."

The Lookout team will present these findings at the Kaspersky Security Analyst Summit on Wednesday.

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Sam Varghese

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Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

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