Possible PHP Webshell Access After Malicious ZIP Upload (via webserver)

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1505.003Web Shell
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects requests to a PHP file named workdone.php served from a work directory, the webshell dropped by extracting a malicious ZIP into /www/work/ during the Mozilla AWS code-execution research. Access to this out-of-place PHP file indicates a planted webshell being used for remote command execution. Detecting it surfaces post-exploitation control of the compromised host.

Reporting behind it

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Possible PHP Webshell Access After Malicious ZIP Upload (via webserver)

Pivot detection · T1190 · 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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