Listen to this Post
Introduction
Coyote malware is a newly discovered Windows Trojan that bypasses traditional detection methods by exploiting built-in accessibility features. Unlike typical infostealers, it uses UI Automation to scan active windows for banking and crypto platforms, capturing sensitive data without triggering standard security alerts. This article explores its attack methodology, detection techniques, and mitigation strategies.
Learning Objectives
- Understand how Coyote malware evades detection using Windows UI Automation.
- Learn detection methods using PowerShell, Windows Event Logs, and YARA rules.
- Implement mitigation strategies to protect against similar attacks.
You Should Know
1. Detecting Coyote Malware with PowerShell
Command:
Get-WinEvent -LogName "Microsoft-Windows-UI Automation/Operational" | Where-Object { $_.Message -like "UIAutomationCore.dll" } | Format-List
Step-by-Step Guide:
1. Open PowerShell as Administrator.
- Run the command to check for UI Automation events, which Coyote malware abuses.
3. Investigate suspicious DLL loads (`UIAutomationCore.dll`).
- Correlate with network traffic (e.g.,
netstat -ano) to identify exfiltration attempts.
2. Analyzing Coyote’s Persistence Mechanisms
Command:
Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" | Select-Object -Property PSChildName, PSPath
Step-by-Step Guide:
- Check registry autorun keys where Coyote may install itself.
- Look for unusual entries or recently modified keys.
- Cross-reference with scheduled tasks (
Get-ScheduledTask | Where State -eq "Ready").
3. Hunting with YARA Rules
YARA Rule:
rule Coyote_Malware {
strings:
$sig1 = "Coyote" nocase
$sig2 = "UIAutomationCore" wide
$sig3 = "banking_targets.txt"
condition:
any of them
}
Step-by-Step Guide:
1. Save the rule as `coyote.yar`.
2. Scan memory or files using:
yara -r coyote.yar C:\Windows\System32\
3. Investigate matches in memory dumps or executables.
4. Blocking Coyote’s Network Exfiltration
Windows Firewall Rule:
New-NetFirewallRule -DisplayName "Block Coyote C2" -Direction Outbound -RemoteAddress 192.168.1.100 -Action Block
Step-by-Step Guide:
- Identify Coyote’s C2 server via traffic analysis (
WiresharkorTCPView). - Block outbound connections to malicious IPs using the above command.
- Monitor logs for evasion attempts (
Get-NetFirewallRule -DisplayName "Block Coyote C2").
5. Disabling UI Automation for Mitigation
Registry Edit:
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\UI Automation" -Name "BlockAutomation" -Value 1
Step-by-Step Guide:
- Restrict UI Automation via Group Policy or registry.
2. Test applications for compatibility issues.
- Log changes and monitor for malware persistence attempts.
What Undercode Say
- Key Takeaway 1: Coyote demonstrates how attackers abuse legitimate Windows features for stealthy data theft.
- Key Takeaway 2: Traditional AV may miss such threats; behavioral analysis and logging are critical.
Analysis:
Coyote’s innovation lies in its abuse of UI Automation, making it harder for signature-based tools to detect. Organizations must adopt:
– Behavioral monitoring (e.g., Sysmon for process tracking).
– Network segmentation to limit lateral movement.
– User training to recognize phishing lures that deliver Coyote.
Prediction
Future malware will increasingly exploit trusted system functions (e.g., PowerShell, RDP). Proactive threat hunting and Zero Trust frameworks will become essential to counter these evolving threats.
Final Word: Coyote is a wake-up call—defenders must adapt faster than attackers innovate. Stay vigilant, monitor anomalies, and harden systems against abuse of legitimate features.
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Ismaildrissi Erawyps – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
