Automated Exfiltration T1020
Tactic: Exfiltration
Adversaries may exfiltrate data, such as sensitive documents, through the use of automated processing after being gathered during Collection.
Events covered
4 catalog events are tagged with this technique by at least one rule.
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
| Defender-DeviceEvents | AmsiScriptContent | AMSI script content captured |
| PowerShell | Event ID 4104 | Creating Scriptblock text (MessageNumber of MessageTotal). |
Authoring guide
Patterns shared across the 49 rules above: which fields they filter on, what specific values they look for, and what they exclude. The catalog normalizes field names across vendors so Sigma's Image, Elastic's process.name, and Splunk's process_name collapse into one row. Each rule contributes at most once per row.
Fields filtered most (64 distinct)
The fields most rules look at when detecting this technique. The How column shows the operators authors use (eq, wildcard, regex_match, match) and how often each appears. Sample values are concrete examples to start from, not an exhaustive list.
Top indicator values (232 distinct)
Specific (field, operator, value) combinations the rules check for, ranked by how many rules under this technique use each one. The Corpus reach column counts how many rules across the entire catalog (any technique) check the same combination. High numbers point to widely-used indicators that are likely noisy on their own; combine them with another condition for useful signal. Blank means the combination is specific to rules under this technique. Click a value to expand the rules under this technique that use it.
Exclusions (6 distinct)
Field/operator/value combinations excluded by rules under this technique (top-level not() clauses), sorted by how many rules exclude each. These are the false-positive paths the community has learned to filter out. A new rule that ignores the high-count entries here will likely fire on the same noisy paths. Click a value to expand the rules under this technique that exclude it.
Rules under this technique
Every rule in the catalog tagged with this technique, grouped by vendor. Click a rule title for its full predicates, exclusions, and indicators.
Sigma 10 rules
- AWS RDS Master Password Change
- Github Fork Private Repositories Setting Enabled/Cleared
- Github Repository/Organization Transferred
- Mail Forwarding/Redirecting Activity In O365
- Mail Forwarding/Redirecting Activity Via ExchangePowerShell Cmdlet
- Modification or Deletion of an AWS RDS Cluster
- PowerShell Script With File Hostname Resolving Capabilities
- PowerShell Script With File Upload Capabilities
- Restore Public AWS RDS Instance
- Suspicious Inbox Forwarding
Elastic 7 rules
- AWS EC2 Full Network Packet Capture Detected
- GitHub Exfiltration via High Number of Repository Clones by User
- GitHub Private Repository Turned Public
- High Number of Closed Pull Requests by User
- High Number of Protected Branch Force Pushes by User
- M365 OneDrive/SharePoint Excessive File Downloads
- Several Failed Protected Branch Force Pushes by User
Splunk 7 rules
- Detect RClone Command-Line Usage
- Detect Renamed RClone
- Detect Traffic Mirroring
- Executable Create Script Process (PowerShell)
- Executable Create Script Process (Sysmon)
- Executable Create Script Process (Windows Event Log)
- Windows Mustang Panda USB Tool Execution
Kusto 19 rules
- A host is potentially running a hacking tool (ASIM Web Session schema)
- API - BOLA
- Cisco Cloud Security - Hack Tool User-Agent Detected
- Claroty - Suspicious file transfer
- Deimos Component Execution
- Mail redirect via ExO transport rule
- Multiple users email forwarded to same destination
- NRT Multiple users email forwarded to same destination
- Office365 Sharepoint File transfer above threshold
- Office365 Sharepoint File transfer Folders above threshold
- Progress MOVEIt File transfer above threshold
- Progress MOVEIt File transfer folder count above threshold
- Server Oriented Cmdlet And User Oriented Cmdlet used
- SFTP File transfer above threshold
- SFTP File transfer folder count above threshold
- Third party integrated apps
- Threat Essentials - Mail redirect via ExO transport rule
- Users searching for VIP user activity
- VIP Mailbox manipulation