Spearphishing Link (T1566.002)

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In Playbook

Associated Tactics

  • Initial Access

Initial Access (TA0001)

The adversary is trying to get into your network. Initial Access consists of techniques that use various entry vectors to gain their initial foothold within a network. Techniques used to gain a foothold include targeted spearphishing and exploiting weaknesses on public-facing web servers. Footholds gained through initial access may allow for continued access, like valid accounts and use of external remote services, or may be limited-use due to changing passwords.

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Procedure Examples

Description Source(s)
Australian Cyber Security Centre. (2012, December). Mitigating Spoofed Emails Using Sender Policy Framework. Retrieved October 19, 2020. ACSC Email Spoofing
CISA. (2019, September 27). Security Tip (ST05-016): Understanding Internationalized Domain Names. Retrieved October 20, 2020. CISA IDN ST05-016
Hacquebord, F.. (2017, April 25). Pawn Storm Abuses Open Authentication in Advanced Social Engineering Attacks. Retrieved October 4, 2019. Trend Micro Pawn Storm OAuth 2017
Jenko Hwong. (2021, August 10). New Phishing Attacks Exploiting OAuth Authorization Flows (Part 1). Retrieved March 19, 2024. Netskope Device Code Phishing 2021
Microsoft 365 Defender Threat Intelligence Team. (2021, June 14). Microsoft delivers comprehensive solution to battle rise in consent phishing emails. Retrieved December 13, 2021. Microsoft OAuth 2.0 Consent Phishing 2021
Microsoft. (2020, October 13). Anti-spoofing protection in EOP. Retrieved October 19, 2020. Microsoft Anti Spoofing
Nick Simonian. (2023, May 22). Don't @ Me: URL Obfuscation Through Schema Abuse. Retrieved August 4, 2023. Mandiant URL Obfuscation 2023
Optiv. (2021, August 17). Microsoft 365 OAuth Device Code Flow and Phishing. Retrieved March 19, 2024. Optiv Device Code Phishing 2021
SecureWorks Counter Threat Unit Research Team. (2021, June 3). OAuth’S Device Code Flow Abused in Phishing Attacks. Retrieved March 19, 2024. SecureWorks Device Code Phishing 2021