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Security Leftovers

Submitted by Roy Schestowitz on Tuesday 5th of April 2022 12:12:53 PM Filed under
Security

  • .ISO Files With Office Maldocs & Protected View in Office 2019 and 2021 [iophk: Windows TCO]

    But when an Office document is stored inside an ISO file, and that ISO has a ZoneIdentifier ADS, then Word will not open the document in Protected View. That is something I observed 5 years ago.

  • The Russian cyberattack threat might force a new IT stance [iophk: Windows TCO]

    Various US government agencies have warned of imminent attacks, but the very few specifics they have offered generally amount to, “Do what every enterprise CISO knows they should have done years ago.”

  • Anatomy of an Android Malware Dropper

    The sample we’ll be looking at was first seen on March 1st, 2022. This particular malware presents itself as the banking app for BAWAG, a prominent financial institution in Austria. Upon first run, the app prompts the user to give “accessibility services” permission to the app. The accessibility services permission grants an app broad access to read the screen and mimic user interaction. Upon granting the permission, the app backgrounds itself. Any attempt by the user to uninstall the app is prevented by the app interrupting and closing the uninstall dialogues. Attempting to open the app again also fails—nothing happens.

    The Android app manifest file contains a list of permissions, activities, and services that an app provides. If an activity is not listed in the app manifest, the app can’t launch that activity. Using an Android static analysis tool like jadx or apktool we can take a look at the manifest XML. The malware app’s manifest asks for a wide range of permissions, including the ability to read and send SMS messages (a common way for malware to propagate), request installation and deletion of packages, read contacts, initiate calls, and request the aforementioned accessibility service. In addition, a number of classes are referenced which are not defined anywhere in our jadx-reversed code:

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