---
name: cyberstrikeus-t1664-exploitation-for-initial-access
description: "Adversaries may exploit software vulnerabilities to gain initial access to a mobile device."
license: "AGPL-3.0"
metadata:
  decimalai-skill-id: "8b5a1c01-e8ac-4566-a82f-1dfb0be732b9"
  decimalai-version-id: "46e41661-87a7-4146-a494-718c86cc6d45"
  decimalai-version: "1"
  decimalai-body-sha256: "595623f4cb5b58c7f0a6d4f50450501795abae445d0dca5ca806fbb284387de2"
  decimalai-name: "cyberstrikeus/T1664_exploitation-for-initial-access"
  decimalai-format: "1"
  decimalai-invocation: "model"
  decimalai-category: "security"
  decimalai-source: "https://app.decimal.ai/s/cyberstrikeus-t1664-exploitation-for-initial-access@1/SKILL.md"
---
# T1664 Exploitation for Initial Access

## High-Level Description

Adversaries may exploit software vulnerabilities to gain initial access to a mobile device.

This can be accomplished in a variety of ways. Vulnerabilities may be present in the applications, the services, the underlying operating system, or the kernel itself. Several well-known mobile device exploits exist, including FORCEDENTRY, StageFright, and BlueBorne. Furthermore, some exploits may be possible to exploit without any user interaction (i.e. zero-click exploits, see Exploitation for Client Execution), making them particularly dangerous. Mobile operating system vendors are typically very quick to patch such critical bugs, ensuring only a small window where they can be exploited.

## Kill Chain Phase

- Initial Access (TA0027)

**Platforms:** Android, iOS

## What to Check

- [ ] Identify if Exploitation for Initial Access technique is applicable to target mobile environment
- [ ] Check Android devices for indicators of Exploitation for Initial Access
- [ ] Check iOS devices for indicators of Exploitation for Initial Access
- [ ] Verify mitigations are bypassed or absent (2 known mitigations)
- [ ] Assess detection coverage (1 detection strategies)

## How to Test

### Identify Attack Surface

Determine if the target mobile environment is susceptible to Exploitation for Initial Access by examining the target platforms (Android, iOS).

### Assess Existing Defenses

Review whether mitigations for T1664 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

## Remediation Guide

### M1001 Security Updates

Security updates frequently contain patches for known software vulnerabilities.

### M1058 Antivirus/Antimalware

Mobile security products can potentially detect if a device is vulnerable to a known exploit and can alert the user to update their device.

## Detection

### Detection of Exploitation for Initial Access

## Risk Assessment

| Finding                                              | Severity | Impact         |
| ---------------------------------------------------- | -------- | -------------- |
| Exploitation for Initial Access technique applicable | High     | Initial Access |

## CWE Categories

| CWE ID | Title                     |
| ------ | ------------------------- |
| CWE-20 | Improper Input Validation |

## References

- [MITRE ATT&CK Mobile - T1664](https://attack.mitre.org/techniques/T1664)