HTTP Callback
Exfiltrate data via HTTP POST requests to attacker-controlled endpoints
Exfiltration · Stage 8
Transfer collected data out of target environment
SKILL-EXFIL
Using legitimate tool capabilities for unauthorized data transfer
Reproduced in a controlled lab environment (DVAA) with documented steps.
ToolBot fetch_url POST
Reproductions in Damn Vulnerable AI Agent, the OpenA2A intentionally-broken agent for kill-chain validation.
Recent observations
Technique-attributed observations from the AgentPwn + TrapMyAgent fleet, classified into Threat Matrix techniques by the registry evidence bridge. See the Attack Prevalence Index for the full distribution.
AgentPwn coverage
An AgentPwn trap page produces a payload tagged with this technique class. Following the AgentPwn taxonomy of trap pages shows what an agent encounters.
AgentPwn's primary signal: the payload HTTP callback fires.
Evidence by source
Evidence timeline
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched a data-exfiltration canary on agentpwn.com (category-level: the lure carried no payload id; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched a data-exfiltration canary on agentpwn.com (category-level: the lure carried no payload id; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched a data-exfiltration canary on agentpwn.com (category-level: the lure carried no payload id; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched a data-exfiltration canary on agentpwn.com (category-level: the lure carried no payload id; classified browser/claimed)
Client fetched a data-exfiltration canary on agentpwn.com (category-level: the lure carried no payload id; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-003 on agentpwn.com (data-exfiltration tier 3; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Client fetched the canary embedded in APWN-DE-005 on agentpwn.com (data-exfiltration tier 5; classified browser/claimed)
Detection · HackMyAgent
npx hackmyagent secure --ciLive = implemented in hackmyagent; queued = declaredDefense · OASB controls
How to cite
AI Agent Threat Matrix T-8002 (HTTP Callback). OpenA2A, 2026. https://threats.opena2a.org/techniques/T-8002