Rootkitdrv
Table of Contents
Overview
Behavior:Win32/Rootkitdrv is a critical **Heuristic and Generic Detection** triggered when an endpoint defense platform (like Windows Defender or an EDR agent) detects a malicious, unverified, or highly suspicious kernel-mode driver (`.sys` file) attempting to load into the Windows Operating System. This is a severe alert indicating that an attacker is attempting to deploy a Rootkit to achieve 'Ring 0' privileges.
Understanding Rootkitdrv (Kernel-Level Evasion)
To an end-user, loading a malicious driver is entirely invisible. For a security team, a Rootkitdrv alert is a worst-case scenario on an endpoint. If a rootkit successfully loads into the kernel (`T1014`), it operates *below* the level of the antivirus software. It can actively intercept OS API calls to hide malicious processes, network connections, and files from user-land security tools (`T1562.001`), making the machine effectively un-trustable.
Execution and Exploitation Mechanics
Attackers typically deploy malicious drivers by first achieving administrator privileges (`T1068`). To bypass the 64-bit Windows requirement for Driver Signature Enforcement (DSE), attackers use a technique called 'Bring Your Own Vulnerable Driver' (BYOVD - `T1068`). They drop an old, legitimate, digitally signed driver (like from an older version of a hardware utility or anti-cheat engine) that has a known vulnerability. They load this vulnerable driver, exploit it from user-land, and use those escalated privileges to load their unsigned rootkit driver into memory.
Indicators of Compromise & Impact
The impact is absolute compromise of the endpoint; the OS itself can no longer be trusted to report accurately. Host-based IoCs include EDR alerts for the installation of new System Services (`T1543.003`) pointing to unknown `.sys` files in `C:\Windows\System32\drivers`. Event logs may show unexpected loading of very old, signed drivers (often associated with hardware vendors like ASUS or Capcom) immediately prior to the alert.
MITRE ATT&CK Techniques
Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:
| Technique | Name | Tactic | Official Spec |
|---|---|---|---|
T1014 | Rootkit (Kernel-level evasion and hooking) | Defense Evasion | ATT&CK ↗ |
T1068 | Exploitation for Privilege Escalation (BYOVD attacks) | Privilege Escalation | ATT&CK ↗ |
T1543.003 | Create or Modify System Process: Windows Service (Loading the driver) | Persistence | ATT&CK ↗ |
T1562.001 | Impair Defenses: Disable or Modify Tools (Blinding EDR sensors) | Defense Evasion | ATT&CK ↗ |
MITRE D3FEND™ Defensive Countermeasures
Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):
| D3FEND ID | Countermeasure Name | Tactic | Countered ATT&CK | Defensive Guidance |
|---|---|---|---|---|
D3-KMC | Kernel Memory Integrity Checking | Harden | T1014 | Enable Hypervisor-Protected Code Integrity (HVCI) and UEFI Secure Boot to prevent unsigned kernel driver execution. |
D3-KPA | Kernel Patching & Privilege Auditing | Harden | T1068 | Enforce rapid OS kernel patch cycles and deploy Exploit Guard protections to block memory corruption and elevation exploits. |
D3-SCM | Windows Service Creation Monitoring | Detect | T1543.003 | Verify service binary image signatures and restrict standard users from creating or modifying service definitions. |
D3-STA | Security Tool Anti-Tamper Enforcement | Harden | T1562.001 | Block unauthorized modification of antivirus registry flags and prevent stopping security agent services. |
Tiered Detection Rules (Cisco CAIRN Model)
Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:
Tier 1 Primitive Artifact Rule (Fast Triage)
Matches raw strings and file markers. Vulnerable to binary repacking and simple obfuscation.
rule MALWARE_WIN_ROOTKITDRV_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Rootkitdrv"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "rootkitdrv" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Tier 2 Behavioral Context Rule (Process Chains & Sigma)
Tracks parent-child process anomalies and suspicious scripting telemetry. Resilient against file renames.
title: SystemHelpDesk Detection - Rootkitdrv (Advanced Threat) Execution & Triage
id: a44c6d2a-70af-5b36-9992-3d2549ff0acb
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Rootkitdrv malware family. Detects proxy execution, reflective DLL loading,
and remote command injection associated with modular enterprise backdoors.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/rootkitdrv
- https://malware-families-catalog.systemhelpdesk.com/defensive/backdoor-rat-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.advanced-threat
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1543_003
- attack.t1014
- attack.t1562_001
- attack.t1068
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \powershell.exe
- \cmd.exe
- \rundll32.exe
- \regsvr32.exe
CommandLine|contains:
- DownloadString
- IEX(
- '/s /n /u /i:'
- sc create
- start-process
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: highTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_ROOTKITDRV_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Rootkitdrv tradecraft"
tier = "T3 - Attribution Fingerprint"
confidence = "High (Confirmed Family Signature)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
// Core family identifier & heuristic payload signatures
$attrib_str = "rootkitdrv" ascii wide nocase
$pe_magic = "MZ" ascii
$net_marker = "http" ascii nocase
condition:
uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}Containment & Response Steps
Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.
- Immediately and physically isolate the endpoint; network connections may be actively hidden by the rootkit.
- Do not trust local forensic tools (like Task Manager or local AV scans) as the rootkit will lie to them; memory analysis of a raw RAM dump is required.
- Wipe the hard drive completely and reinstall the operating system from a verified, clean image.
- Ensure that Windows Defender Application Control (WDAC) is configured to block known vulnerable drivers (Microsoft's Vulnerable Driver Blocklist).
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not attempt to 'clean' a rootkit infection; once the kernel is compromised, the only safe remediation is a complete wipe and reinstall.
- Avoid trusting network telemetry originating from the infected host, as the rootkit can selectively hide malicious packets.
References & External Analysis
- Search "rootkitdrv" on VirusTotal (External Analysis)
- Search "rootkitdrv" on Any.Run (Sandbox Sandbox)
- Search "rootkitdrv" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Rootkitdrv and what threat category does it belong to?
Rootkitdrv is classified as a Advanced Threat. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments.
How does Rootkitdrv establish persistence and evade defensive controls?
Rootkitdrv typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks.
What are the essential incident response steps for mitigating a Rootkitdrv compromise?
Security teams responding to Rootkitdrv should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups.
What lateral movement and credential access tactics does Rootkitdrv leverage in enterprise intrusions?
Rootkitdrv frequently utilizes privileged account harvesting techniques such as LSASS memory dumping, Kerberoasting, and token impersonation to escalate privileges. Once administrative credentials are acquired, it pivots across the victim network utilizing living-off-the-land binaries (LOLBins) such as WMI, PowerShell remoting, and PsExec, or abuses remote desktop protocols (RDP) to reach critical internal repositories and domain controllers.
How does Rootkitdrv maintain covert communications and evade perimeter network monitoring?
Rootkitdrv often relies on multi-stage command and control (C2) architectures utilizing encrypted protocols over standard web ports (HTTPS/443 or DNS tunneling) to blend in with legitimate enterprise network traffic. Many variants incorporate proxy networks, domain fronting, or cloud services (such as Microsoft Graph API, Google Drive, or Telegram) to masquerade C2 channels, bypassing traditional signature-based egress filtering.
How do I remove the Rootkitdrv Advanced_Threat from Windows?
Manual removal of Rootkitdrv is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Rootkitdrv a virus or a Advanced_Threat?
Rootkitdrv is classified as a Advanced_Threat. Unlike traditional viruses that infect files, modern malware like Rootkitdrv typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Rootkitdrv infection?
Symptoms of Rootkitdrv can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Protect Your Network Against Advanced_Threats
Want to prevent Rootkitdrv and similar threats from compromising your organization? Read our comprehensive defensive guide: Think You've Been Hacked? What To Do First.
📣 Threat Intel Correction or Update?
Notice an outdated IOC, unlisted alias, or disputed attribution? Threat researchers are invited to propose an update on GitHub or contact the SystemHelpDesk research desk. All community revisions are credited in our public CHANGELOG.
Machine-readable
Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/rootkitdrv.json
Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.