Suspicious APT42 Remote Payload Download via PowerShell Web Client (via ps_script)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects PowerShell using wget, curl, or Invoke-WebRequest aliases to retrieve a remote configuration or payload file such as nconf.txt. APT42 pulled staged text-based payloads over PowerShell during post-compromise tooling deployment. Scripted retrieval of remote text payloads is a common ingress-tool-transfer behavior worth correlating with follow-on execution.

Reporting behind it

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Suspicious APT42 Remote Payload Download via PowerShell Web Client (via ps_script)

Pivot detection · T1105 · 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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