Hunt Hypothesis
This rule detects potential unauthorized access to or exploitation of the GoDevTool web application, which may indicate an adversary leveraging a known development utility for initial access or lateral movement. Proactively hunting for this activity allows the SOC team to identify early-stage footholds or misconfigurations in Azure Sentinel before they escalate into more significant breaches.
YARA Rule
rule IsGoLink
{
meta:
author="_pusher_"
date = "2016-08"
description="www.GoDevTool.com"
strings:
$a0 = { 47 6F 4C 69 6E 6B }
condition:
// MZ signature at offset 0 and ...
uint16(0) == 0x5A4D and
// ... PE signature at offset stored in MZ header at 0x3C
$a0 at 0x40
}
Deployment Notes
This YARA rule can be deployed in the following contexts:
- Microsoft Defender for Endpoint — Custom indicators / advanced hunting
- Email Gateway — Attachment scanning
- File Share Monitoring — Periodic scanning of shared drives
- YARA CLI — Manual threat hunting on endpoints
This rule contains 1 string patterns in its detection logic.
False Positive Guidance
- Automated Dependency Scanning and CI/CD Pipelines: Continuous Integration systems (e.g., GitHub Actions, Jenkins, Azure DevOps) often execute build scripts that fetch dependencies or check for updates from public repositories or tool registries. If
www.GoDevTool.com is used as a source for Go language packages, plugins, or development utilities, the HTTP GET requests will trigger the rule.
- Filter/Exclusion: Exclude traffic from known CI/CD service account IPs or specific container image digests. Alternatively, allowlist the domain if it is a verified internal mirror or public registry used by the development team, and restrict the rule to non-production networks.
- IDE Plugin Auto-Updates and Telemetry: Developers using Integrated Development Environments (e.g., VS Code, GoLand, IntelliJ) may have plugins or extensions that automatically check for updates or send anonymous usage telemetry to
www.GoDevTool.com. This is common for open-source tools or specific Go ecosystem integrations.
- Filter/Exclusion: Exclude processes associated with known IDE binaries (e.g.,
code.exe, goland64.exe, idea64.exe) or filter by user-agent strings that identify the specific IDE or plugin version.
- Scheduled Backup or Snapshot Jobs: Enterprise backup solutions (e.g., Veeam, Commvault, or custom PowerShell scripts) might use
www.GoDevTool.com as a reference endpoint for licensing checks, feature flag retrieval, or metadata synchronization for Go-based backup agents.
- Filter/Exclusion: Exclude traffic originating from backup server hostnames or specific service accounts (e.g.,
svc-backup, backup-agent) and limit the exclusion to business hours or scheduled maintenance windows.
- Developer Laptops in DMZ or Dev Zones: Developers working in non-production environments (Dev/Stage) frequently install and run Go-based CLI