Sigma rule: PowerShell ICMP Exfiltration

Rule

Title

PowerShell ICMP Exfiltration

Status

test

Level

medium

Author

Bartlomiej Czyz @bczyz1, oscd.community

Date

2020-10-10

Modified

2022-12-25

File

rules/windows/powershell/powershell_script/posh_ps_icmp_exfiltration.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Exfiltration Over Alternative Protocol - ICMP. Adversaries may steal data by exfiltrating it over an un-encrypted network protocol other than that of the existing command and control channel.

Log source

product

windows

category

ps_script

definition

Requirements: Script Block Logging must be enabled

Detection

selection:
    ScriptBlockText|contains|all:
        - 'New-Object'
        - 'System.Net.NetworkInformation.Ping'
        - '.Send('
condition: selection

False positives (as the rule lists them)

• Legitimate usage of System.Net.NetworkInformation.Ping class

Tags

• attack.exfiltration
• attack.t1048.003

MITRE ATT&CK ids this rule names

• T1048.003

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1048.003/T1048.003.md#atomic-test-2---exfiltration-over-alternative-protocol---icmp

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_icmp_exfiltration.yml