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Home/ATT&CK/T1661
MITRE ATT&CK Technique

T1661: Application Versioning

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An adversary may push an update to a previously benign application to add malicious code. This can be accomplished by pushing an initially benign, functional application to a trusted application store, such as the Google Play Store or the Apple App Store. This allows the adversary to establish a trusted userbase that may grant permissions to the application prior to the introduction of malicious code. Then, an application update could be pushed to introduce malicious code.(Citation: android_app_breaking_bad) This technique could also be accomplished by compromising a developer’s account. This would allow an adversary to take advantage of an existing userbase without having to establish the userbase themselves.

Tactics
Initial AccessDefense Evasion
Platforms
Android, iOS

▪Mitigations (2)

M1012Enterprise Policy

An enterprise mobility management (EMM), also known as mobile device management (MDM), system can be used to provision policies to mobile devices to control aspects of their allowed behavior.

M1006Use Recent OS Version

New mobile operating system versions bring not only patches against discovered vulnerabilities but also often bring security architecture improvements that provide resilience against potential vulnerabilities or weaknesses that have not yet been discovered. They may also bring improvements that block use of observed adversary techniques.

▪Software using this technique (1)

S1055SharkBotmalware

▪Reference

T1661on MITRE ATT&CK

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.