Techniques › T1567 › AN1511
AN1511 Analytic 1511
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Processes that normally do not initiate network communications suddenly making outbound HTTPS connections with high outbound-to-inbound data ratios. Defender view: correlation between process creation logs (e.g., Word, Excel, PowerShell) and subsequent anomalous network traffic volumes toward common web services (Dropbox, Google Drive, OneDrive).</p>
- Detects
- T1567 Exfiltration Over Web Service
- Part of
- DET0548 Detection Strategy for Exfiltration Over Web Service
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| WinEventLog:Security | EventCode=4688 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=3, 22 | DC0082 Network Connection Creation |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
MonitoredServices | List of legitimate web services to baseline (Dropbox, OneDrive, Google Drive). |
ExfilVolumeThreshold | Outbound data threshold for flagging unusual activity, tunable by environment. |
TimeWindow | Aggregation period to calculate anomalies in outbound data volume. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2022-41082 | Microsoft Exchange Server | Mapped |
| CVE-2024-11182 | MDaemon Email Server | Mapped |
| CVE-2025-54309 | CrushFTP CrushFTP | Mapped |