Pandora

Hunt Hypothesis

The Pandora rule detects potential adversary behavior involving suspicious file execution or network communication that may indicate initial compromise or lateral movement. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage threats before they escalate.

YARA Rule

rule Pandora
{
	meta:
		author = " Kevin Breen <[email protected]>"
		date = "2014/04"
		ref = "http://malwareconfig.com/stats/Pandora"
		maltype = "Remote Access Trojan"
		filetype = "exe"

	strings:
		$a = "Can't get the Windows version"
		$b = "=M=Q=U=Y=]=a=e=i=m=q=u=y=}="
		$c = "JPEG error #%d" wide
		$d = "Cannot assign a %s to a %s" wide
		$g = "%s, ProgID:"
		$h = "clave"
		$i = "Shell_TrayWnd"
		$j = "melt.bat"
		$k = "\\StubPath"
		$l = "\\logs.dat"
		$m = "1027|Operation has been canceled!"
		$n = "466|You need to plug-in! Double click to install... |"
		$0 = "33|[Keylogger Not Activated!]"

	condition:
		all of them
}

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 13 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Scenario: Scheduled system maintenance or patching using Ansible or Chef

  • Filter/Exclusion: Check for presence of ansible or chef in the command line, or filter by process parent process (e.g., systemd or cron)

• Scenario: Regular logrotate job execution

  • Filter/Exclusion: Filter by process name logrotate or check for presence of /etc/logrotate.conf in the command line

• Scenario: PowerShell script running as part of a routine system cleanup task

  • Filter/Exclusion: Filter by powershell.exe and check for known cleanup scripts or paths like C:\Windows\System32\ or C:\Program Files\

• Scenario: Windows Task Scheduler running a legitimate administrative script

  • Filter/Exclusion: Filter by schtasks.exe or check for task names that match known administrative tasks (e.g., DailyDiskCleanup)

• Scenario: Docker container lifecycle management (e.g., docker stop, docker rm)

  • Filter/Exclusion: Filter by docker in the command line or check for presence of container IDs or names in the process context