Interactsh / Interact.sh (also known as Interactsh, interact.sh, oast.pro) is a security tool / technique active since 2021. OOB interaction testing tool. Key characteristics include: out-of-band DNS/HTTP/SMTP callbacks, vulnerability confirmation, abused for data exfiltration.
Overview & Background
OOB interaction testing tool. First identified in 2021, this threat is attributed to ProjectDiscovery (legitimate).
Interactsh remains an active threat. Organizations should implement detection rules and monitor for indicators associated with this security tool / technique.
- Category: Security Tool / Technique
- Active since: 2021
- Attribution: ProjectDiscovery (legitimate)
- Also known as: Interactsh, interact.sh, oast.pro
Technical Analysis
Interactsh employs the following capabilities and techniques:
- Out-Of-Band Dns/Http/Smtp Callbacks: Core functionality
- Vulnerability Confirmation: Core functionality
- Abused For Data Exfiltration: Core functionality
MITRE ATT&CK Mapping
| Tactic | Technique | Usage |
|---|---|---|
| Initial Access | T1566.001 Phishing Attachment | Common delivery vector |
| Execution | T1204.002 Malicious File | User-triggered execution |
| Persistence | T1547.001 Registry Run Keys | Autostart persistence |
| Defense Evasion | T1027 Obfuscated Files | Payload obfuscation |
| C2 | T1071.001 Web Protocols | HTTP/HTTPS C2 |
Detection & Defense
- Endpoint detection: Deploy behavioral detection rules for Interactsh indicators
- Network monitoring: Monitor for C2 traffic patterns and anomalous connections
- Threat intelligence: Track Interactsh IOCs and campaign updates
- Security awareness: Train users to recognize phishing and social engineering
- Patch management: Keep systems updated to prevent exploitation
Defend Against Interactsh
Mjolnir Security provides detection and response capabilities against Interactsh and similar threats.
- Proactive Threat Hunting Hunt for Interactsh indicators and TTPs within your environment.
- Threat Intelligence Monitor Interactsh campaigns and infrastructure changes.
- 24/7 Incident Response Rapid containment and forensic investigation. Call +1 833 403 5875.
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