Adversaries may use voice communications to ultimately gain access to victim systems. Spearphishing voice is a specific variant of spearphishing. It is different from other forms of spearphishing in that it employs the use of manipulating a user into providing access to systems through a phone call or other forms of voice communications. Spearphishing frequently involves social engineering techniques, such as posing as a trusted source (ex: Impersonation) and/or creating a sense of urgency or alarm for the recipient.

All forms of phishing are electronically delivered social engineering. In this scenario, adversaries are not directly sending malware to a victim vice relying on User Execution for delivery and execution. For example, victims may receive phishing messages that instruct them to call a phone number where they are directed to visit a malicious URL, download malware,^[1],[2] or install adversary-accessible remote management tools (Remote Access Tools) onto their computer.^[3]

Adversaries may also combine voice phishing with Multi-Factor Authentication Request Generation in order to trick users into divulging MFA credentials or accepting authentication prompts.^[4]

References

1. Oren Biderman, Tomer Lahiyani, Noam Lifshitz, Ori Porag. (n.d.). LUNA MOTH: THE THREAT ACTORS BEHIND RECENT FALSE SUBSCRIPTION SCAMS. Retrieved February 2, 2023.
2. CISA. (n.d.). Protecting Against Malicious Use of Remote Monitoring and Management Software. Retrieved February 2, 2023.
3. Kristopher Russo. (n.d.). Luna Moth Callback Phishing Campaign. Retrieved February 2, 2023.
4. Proofpoint. (n.d.). What Is Vishing?. Retrieved September 8, 2023.

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