Agent Smith
Agent Smith is mobile malware that generates financial gain by replacing legitimate applications on devices with malicious versions that include fraudulent ads. As of July 2019 Agent Smith had infected around 25 million devices, primarily targeting India though effects had been observed in other Asian countries as well as Saudi Arabia, the United Kingdom, and the United States.[1]
Techniques Used
| Domain | ID | Name | Use | |
|---|---|---|---|---|
| Mobile | T1418 | Application Discovery |
Agent Smith obtains the device’s application list.[1] |
|
| Mobile | T1577 | Compromise Application Executable |
Agent Smith can inject fraudulent ad modules into existing applications on a device.[1] |
|
| Mobile | T1447 | Delete Device Data |
Agent Smith deletes infected applications’ update packages when they are detected on the system, preventing updates.[1] |
|
| Mobile | T1476 | Deliver Malicious App via Other Means |
Agent Smith has been distributed through the 9apps app store.[1] |
|
| Mobile | T1404 | Exploit OS Vulnerability |
Agent Smith exploits known OS vulnerabilities, including Janus, to replace legitimate applications with malicious versions.[1] |
|
| Mobile | T1472 | Generate Fraudulent Advertising Revenue |
Agent Smith shows fraudulent ads to generate revenue.[1] |
|
| Mobile | T1444 | Masquerade as Legitimate Application |
Agent Smith can impersonate any popular application on an infected device, and the core malware disguises itself as a legitimate Google application. Agent Smith's dropper is a weaponized legitimate Feng Shui Bundle.[1] |
|
| Mobile | T1406 | Obfuscated Files or Information |
Agent Smith’s core malware is disguised as a JPG file, and encrypted with an XOR cipher.[1] |
|
| Mobile | T1424 | Process Discovery |
Agent Smith checks if a targeted application is running in user-space prior to infection.[1] |
|
| Mobile | T1508 | Suppress Application Icon |
Agent Smith can hide its icon from the application launcher.[1] |
|