Iron Panda Malware

Hunt Hypothesis

The Iron Panda Malware is likely being used to establish persistence and exfiltrate data through covert network communication. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate potential long-term data breaches and unauthorized access.

YARA Rule

rule IronPanda_Malware4 
{

    meta:
        description = "Iron Panda Malware"
        author = "Florian Roth"
        reference = "https://goo.gl/E4qia9"
        date = "2015-09-16"
        hash = "0d6da946026154416f49df2283252d01ecfb0c41c27ef3bc79029483adc2240c"

    strings:
        $s0 = "TestPlugin.dll" fullword wide
        $s1 = "<a href='http://www.baidu.com'>aasd</a>" fullword wide
        $s2 = "Zcg.Test.AspxSpyPlugins" fullword ascii
        $s6 = "TestPlugin" fullword ascii
   
    condition:
        uint16(0) == 0x5a4d and filesize < 10KB and 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 4 string patterns in its detection logic.

References

• https://goo.gl/E4qia9
• Source Rule

False Positive Guidance

• Scenario: System Maintenance Scheduled Task
  Description: A legitimate scheduled task is run by the system administrator to perform disk cleanup or update system files.
  Filter/Exclusion: Exclude tasks with TaskName containing “Cleanup” or “Update” and User set to “SYSTEM” or “LocalSystem”.

• Scenario: Log File Analysis by SIEM Tool
  Description: A Security Information and Event Management (SIEM) tool like Splunk or ELK is parsing log files and generating alerts for unusual activity.
  Filter/Exclusion: Exclude processes with ProcessName matching “splunkd.exe”, “logstash”, or “kibana” and check for ParentProcess matching the SIEM service.

• Scenario: Antivirus Scan Execution
  Description: A third-party antivirus tool such as Bitdefender or Kaspersky is performing a full system scan, which may trigger suspicious process activity.
  Filter/Exclusion: Exclude processes with ProcessName matching “bitdefender.exe”, “kavsvc.exe”, or “avgnt.exe” and check for ParentProcess matching the antivirus service.

• Scenario: Database Backup Job
  Description: A database backup job is executed by a tool like mysqldump or sqlbackup, which may exhibit behavior similar to malware.
  Filter/Exclusion: Exclude processes with ProcessName matching “mysqldump.exe”, “sqlbackup.exe”, or “pg_dump” and check for CommandLine containing “backup” or “restore”.

• Scenario: PowerShell Script for System Monitoring
  Description: A PowerShell script written by an admin for system monitoring or compliance checks is flagged due to its script-based execution.
  Filter/Exclusion: Exclude processes with ProcessName matching “powershell.exe” and CommandLine containing