Suspicious NFe-Themed Brazilian Lure Executable Execution

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1566.002Spearphishing Link
Execution
- T1204.002Malicious File
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects execution of NFe (Nota Fiscal) invoice-themed droppers such as AGENT_NFe, Boleto_NFe or NOTA_FISCAL_NFe executables that carry a random suffix. This Brazil-focused spam campaign delivered these lures via Dropbox to trick recipients into launching them, after which trial-account RMM software is installed to grant the operator remote access.

Reporting behind it

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Suspicious NFe-Themed Brazilian Lure Executable Execution

Pivot detection · T1204.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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