T1111: Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs)

Framework: MITRE ATT&CK · Tactic: Credential Access · Total Cataloged Families: 9 · Observed Samples: 1,585 · Primary Threat Categories: Ransomware · Trojan · Banking Trojan

Operational Executive Summary

T1111 (Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs)) is classified under the Credential Access tactic within the MITRE ATT&CK framework. Techniques for stealing credentials such as plaintext passwords, password hashes, and Kerberos tickets using memory dumping (LSASS) and browser credential store decryption. In telemetry gathered across enterprise endpoints and the EMBER 2018 benchmark, this technique was weaponized across 9 distinct malware families, totaling over 1,585 validated samples.

Technical Anatomy & Adversary Tradecraft

Adversaries leverage Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs) to accomplish operational objectives while minimizing anomalous forensic footprints. When executing Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs), malicious binaries commonly interact directly with low-level Windows APIs, kernel mode drivers, or native scripting interfaces to bypass traditional file-integrity monitors and static antivirus signatures.

In modern multi-stage campaigns, T1111 is frequently observed functioning as an intermediate bridge: initial access payloads (such as spearphishing loaders or exploit macros) execute Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs) to establish in-memory execution or persistence before staging secondary ransomware or data-exfiltration implants.

Authoritative MITRE ATT&CK Reference: View official technique documentation, sub-techniques, and adversary groups at https://attack.mitre.org/techniques/T1111/.

Detection Engineering & Threat Hunting

Detecting Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs) requires telemetry correlation across endpoint detection and response (EDR) agents, Sysmon event streams, and security information event management (SIEM) pipelines:

Process Creation & Lineage: Monitor parent-child process anomalies where unexpected parent binaries (e.g., Office executables, web browsers, or script hosts) spawn command shells or native Windows utilities.
API Hooking & Behavioral Telemetry: EDR platforms should flag rapid calls to memory allocation, process injection, or registry manipulation APIs originating from unbacked executable memory regions.
Network Anomaly Correlation: Cross-reference endpoint execution timestamps with external network socket establishment to identify anomalous beaconing or covert data staging.

SOC Containment & Hardening Guidance

To mitigate risks associated with T1111 (Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs)) across production infrastructure, security teams should implement the following defensive controls:

Attack Surface Reduction (ASR): Enforce strict application control policies (WDAC or AppLocker) to restrict execution to signed and verified corporate binaries.
Least Privilege & Credential Hygiene: Restrict local administrative privileges to prevent adversaries from tampering with defensive agents or escalating privileges.
Network Microsegmentation: Restrict lateral communication across endpoint VLANs to prevent wormable payloads from utilizing Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs) across adjacent network segments.

→ Incident Response Guidance: Read our InfoStealer Protection & Remediation

Cataloged Malware Families Utilizing T1111 (9 Families)

The following malware families in the SystemHelpDesk catalog have been verified utilizing T1111 (Two-Factor Authentication Interception (Using Man-in-the-Browser web injects to steal OTPs)):

9 families

Family	Category	Sample Count	Technical Summary
tinba	Banking Trojan	`1,531`	Trojan:Win32/Tinba (short for 'Tiny Banker', also cataloged by vendors as Zusy) is a landmark banking trojan famous for its remarkably micro-sized footprint—com...
shylock	Banking Trojan	`21`	Shylock (also cataloged across international law enforcement and intelligence communities as Capito) is a sophisticated financial malware family and banking tro...
papras	Infostealer	`15`	Papras (classified across cybersecurity vendors as Trojan:Win32/Papras, PWS:Win32/Papras, and Trojan-PSW.Win32.Papras) is a modular password stealer and banking...
cycbot	Ransomware	`8`	Backdoor:Win32/Cycbot is a notorious, highly persistent botnet agent and backdoor primarily known for executing massive click-fraud campaigns and hijacking sear...
betabot	Trojan	`3`	Betabot (classified in antivirus detection telemetry under designations including Trojan:Win32/Betabot, Trojan.Win32.Betabot, and Win32/Betabot) is a multi-stag...
bank	Ransomware	`2`	Bank (classified in antivirus detection telemetry under designations including Ransom:Win32/Bank, Ransom.Win32.Bank, and Win32/Bank) is a crypto-ransomware desi...
sphinx	Trojan	`2`	Trojan:Win32/Sphinx is a sophisticated Info-Stealer and banking trojan, highly active in targeting financial institutions and cryptocurrency platforms. While it...
trojanbanker	Ransomware	`2`	Trojan:Win32/TrojanBanker is a broad classification encompassing some of the most sophisticated and financially damaging malware in existence (including familie...
bnksa	Trojan	`1`	Bnksa (classified in antivirus detection telemetry under designations including Trojan:Win32/Bnksa, Trojan.Win32.Bnksa, and Win32/Bnksa) is a multi-stage trojan...