Iron Panda Malware | SOC Hunt Feed

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 lateral movement.

YARA Rule

rule IronPanda_Malware2 
{

    meta:
        description = "Iron Panda Malware"
        author = "Florian Roth"
        reference = "https://goo.gl/E4qia9"
        date = "2015-09-16"
        hash = "a89c21dd608c51c4bf0323d640f816e464578510389f9edcf04cd34090decc91"

    strings:
        $s0 = "\\setup.exe" fullword ascii
        $s1 = "msi.dll.urlUT" fullword ascii
        $s2 = "msi.dllUT" fullword ascii
        $s3 = "setup.exeUT" fullword ascii
        $s4 = "/c del /q %s" fullword ascii
   
    condition:
        uint16(0) == 0x5a4d and filesize < 180KB 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 5 string patterns in its detection logic.

References

False Positive Guidance

Scenario: Scheduled System Maintenance Task
Description: A legitimate scheduled task runs a script that performs system cleanup or updates, which may include file operations similar to those observed by the Iron Panda Malware.
Filter/Exclusion: Exclude tasks associated with Task Scheduler and known system maintenance scripts (e.g., schtasks.exe with TaskName containing “Cleanup” or “Update”).
Scenario: Admin Performing File Integrity Check
Description: An administrator uses a tool like Tripwire or OSSEC to scan for file changes, which may trigger file modification alerts similar to those seen with Iron Panda.
Filter/Exclusion: Exclude events where the process is tripwire.exe, ossec.exe, or any known integrity monitoring tool, and filter by user account (e.g., root, admin, or system).
Scenario: Backup Job Executing
Description: A backup job using Veeam, Commvault, or Veritas may involve copying or moving files, which could be mistaken for malicious activity.
Filter/Exclusion: Exclude processes related to backup tools (e.g., veeam.exe, cvbackup.exe) and filter by file paths commonly used in backup operations (e.g., C:\Backup\, D:\Archives\).
Scenario: PowerShell Script for Log Analysis
Description: A system administrator runs a PowerShell script using PowerShell ISE or PowerShell Core to analyze logs, which may involve file operations that resemble malware behavior.
Filter/Exclusion: Exclude processes with powershell.exe where the command line includes known log analysis tools or scripts (e.g., Get-EventLog, Get-ChildItem with specific paths).
Scenario: Software Update Deployment
*Description