This detection identifies potentially malicious or unauthorized code execution patterns defined by the ShadowTech YARA signature within Azure Sentinel workloads. Proactively hunting for these indicators allows the SOC team to uncover stealthy adversary activities that may bypass standard alerting thresholds due to their low severity classification.
rule ShadowTech
{
meta:
author = " Kevin Breen <kevin@techanarchy.net>"
date = "2014/04"
ref = "http://malwareconfig.com/stats/ShadowTech"
maltype = "Remote Access Trojan"
filetype = "exe"
strings:
$a = "ShadowTech" nocase
$b = "DownloadContainer"
$c = "MySettings"
$d = "System.Configuration"
$newline = "#-@NewLine@-#" wide
$split = "pSIL" wide
$key = "ESIL" wide
condition:
4 of them
}
This YARA rule can be deployed in the following contexts:
This rule contains 7 string patterns in its detection logic.
Here are 5 specific false positive scenarios for the ShadowTech detection rule in an enterprise environment, including suggested filters and exclusions:
Antivirus Real-Time Scanning on Developer Workstations
CrowdStrike.exe, MsMpEng.exe) when operating on paths containing \Temp\ or \Quarantine. Additionally, exclude alerts where the parent process is a scheduled maintenance task running between 02:00 and 04:00 UTC.CI/CD Pipeline Artifact Deployment
C:\Build\Staging directory on Windows Server 2019 nodes.jenkins-agent.exe, github-runner.exe) and the file path matches the regex pattern .*\\[A-Z]{3,}-BUILD-.*. Implement a whitelist for specific SHA256 hashes of the deployment scripts used by the DevOps team.Enterprise License Compliance Audits