Refog

Overview

Spyware:Win32/Refog (also detected as Monitor:Win32/Refog or Riskware/Refog) is a commercially available 'employee monitoring' and 'parental control' software application. However, from a technical perspective, it possesses all the capabilities of a highly sophisticated, malicious keylogger and infostealer. Because it is frequently installed secretly by insiders, domestic abusers, or unauthorized individuals to covertly monitor a victim's activities, security vendors universally classify it as Spyware or Riskware.

Understanding the Refog Threat
To the person being monitored, Refog operates entirely invisibly. There are no tray icons or taskbar entries. For an enterprise security team, the presence of Refog is a critical incident, usually indicating a severe Insider Threat (`T1078`) or a profound violation of corporate privacy policies. It means every password typed, every email sent, and every application opened on that machine is being recorded and exfiltrated.

Execution and Surveillance Mechanics
Refog is typically installed locally by an individual with physical access or administrative credentials to the target machine (`T1199`). Once installed, it hooks deeply into the Windows operating system (`T1056.001`), often utilizing specialized kernel-mode drivers to intercept all keystrokes globally. It takes periodic screenshots (`T1113`), logs clipboard contents (`T1115`), tracks all visited URLs, and records chat application transcripts (`T1114`). The software then compiles this massive surveillance cache and stealthily exfiltrates it to the installer, either via scheduled emails, hidden FTP uploads, or by syncing to a cloud portal provided by the Refog vendor (`T1041`).

Indicators of Compromise & Impact
The primary impact is the total compromise of endpoint privacy and the theft of all entered credentials and sensitive data. Host-based IoCs include the presence of known Refog installation directories (often obfuscated or hidden in `ProgramData` or `System32`), the loading of specific surveillance DLLs (`mpk.dll` is historically associated with Refog/MPK), and hidden scheduled tasks. Network IoCs include periodic, automated SMTP or HTTPS traffic sending large data blobs to external, non-corporate addresses or known Refog cloud portals.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

Tactical Mitigations

Based on the techniques used by this family, consider the following defensive strategies:

• T1056.001: Implement Endpoint Detection and Response (EDR) to monitor for suspicious API calls related to keystroke interception. Enforce Multi-Factor Authentication (MFA) to render stolen passwords useless.
• T1113: Monitor for frequent or unauthorized screen captures or clipboard reads. Restrict background applications from accessing desktop APIs.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

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:

rule MALWARE_WIN_REFOG_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Refog"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "refog" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Refog (Advanced Threat) Execution & Triage
id: 25759969-7c59-5c98-9b2e-6ae4852e1508
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Refog 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/refog
- 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.t1056_001
- attack.t1041
- attack.t1199
- attack.t1113
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: high

rule MALWARE_WIN_REFOG_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Refog 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 = "refog" 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.

1. Treat this as a high-severity Insider Threat incident. Do not immediately alert the user, as the installer may be their manager or a hostile insider.
2. Isolate the endpoint to halt the active exfiltration of surveillance data.
3. Coordinate closely with HR and Legal departments to determine if the installation was a sanctioned (but poorly communicated) corporate monitoring initiative or an unauthorized abuse.
4. If unauthorized, reimage the machine and force a reset of all passwords typed on that endpoint, as they are completely compromised.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not ignore the detection because it is a 'commercial' tool; commercial keyloggers are identical in function to malware and represent a massive liability.
2. Avoid assuming an external threat actor installed it; commercial spyware is almost always installed by someone with pre-existing physical or logical access.

References & External Analysis

• Search "refog" on VirusTotal (External Analysis)
• Search "refog" on Any.Run (Sandbox Sandbox)
• Search "refog" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Advanced Threat)

Explore other documented threats in the same operational category:

• Driverbooster
• Spyrix
• Fleercivet
• Iwin
• Mediafinder
• Snipr
• Playgames
• Iespy

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/refog.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.