Kradword
Table of Contents
Overview
Executive Summary
Kradword is a malicious Trojan specifically engineered to function as an Information Stealer and Keylogger. Unlike broad-spectrum botnet malware, Kradword is a targeted surveillance tool. Its primary objective is to silently monitor user activity, record keystrokes, and exfiltrate sensitive data—specifically targeting login credentials, financial information, and proprietary communications.Infection Vector and Technical Capabilities
Kradword is typically distributed via targeted spear-phishing campaigns (business email compromise) containing weaponized attachments, or it is dropped as a secondary payload by an initial access broker who has already compromised the network perimeter. Once executed, Kradword employs stealthy data harvesting techniques:- API Hooking and Keylogging: Kradword utilizes Windows API hooking (specifically `SetWindowsHookEx`) to intercept hardware interrupts from the keyboard. It records every keystroke made by the user, storing them in hidden, encrypted log files on the local system.
- Clipboard Monitoring: The trojan actively monitors the Windows clipboard, instantly capturing any data (like copied passwords or cryptocurrency wallet addresses) that the user copies and pastes.
- Browser Data Extraction: It targets the credential stores of major web browsers (Chrome, Firefox) to extract saved passwords, autocomplete form data, and active session cookies.
- Data Exfiltration: The collected data logs are periodically compressed, encrypted, and exfiltrated to the attacker's Command and Control (C2) server via SMTP (email), FTP, or HTTP POST requests.
Threat Assessment
A Kradword infection is a critical security incident. The immediate risk is the catastrophic compromise of user credentials. Stolen corporate VPN or RDP credentials provide the attacker with direct, authenticated access to the internal network, bypassing external firewalls and often leading to severe data breaches or ransomware deployment.Incident Response and Remediation
- Immediate Network Severance: Isolate the compromised endpoint immediately to halt the ongoing exfiltration of keylogs and stolen credentials.
- Global Credential Reset: It must be assumed that every password entered or stored on the infected machine is in the hands of the attacker. A mandatory, immediate reset of all associated enterprise and personal passwords is required.
- Complete Re-imaging: Due to the deep API hooking techniques used by keyloggers, attempting to "clean" the machine is insufficient. A complete bare-metal wipe and re-image from a trusted baseline is necessary.
Known aliases
Threat reports may refer to this family under multiple names:
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 |
|---|---|---|---|
T1056.001 | Keylogging | Credential Access | ATT&CK ↗ |
T1115 | Clipboard Data | Collection | ATT&CK ↗ |
T1552.001 | Credentials In Files (Harvesting passwords and wallets from local storage) | Credential Access | ATT&CK ↗ |
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.
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-MFA | Multi-factor Authentication | Harden | T1056.001 | Enforce FIDO2 / WebAuthn physical tokens to render keystroke-intercepted passwords useless. |
D3-CAC | Clipboard Access Control | Isolate | T1115 | Isolate virtual desktop infrastructure (VDI) clipboards and alert on rapid background clipboard querying by non-foreground processes. |
D3-FPA | File Permission Auditing | Harden | T1552.001 | Scan filesystem repositories for plaintext configuration files and restrict access via Least Privilege RBAC controls. |
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_KRADWORD_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Kradword"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "kradword" ascii wide nocase
$s2 = "trojan.kradword" ascii wide nocase
$s3 = "keylogger.kradword" ascii wide nocase
$s4 = "win32/spy.kradword" 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 - Kradword (Ransomware) Execution & Triage
id: 1bec4afc-c315-523e-863a-f3ede5be96d8
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Kradword malware family. Detects volume shadow copy deletion, boot status
tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/kradword
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-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.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1056_001
- attack.t1115
- attack.t1552_001
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \vssadmin.exe
- \wmic.exe
- \wbadmin.exe
- \bcdedit.exe
CommandLine|contains:
- delete shadows
- shadowcopy delete
- resize shadowstorage
- recoveryenabled no
- ignoreallfailures
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: criticalTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_KRADWORD_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Kradword 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 = "kradword" 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 isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Kradword from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.
- Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Kradword symmetric encryption keys or uncompiled payload components may still reside in memory.
- Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Kradword to inhibit recovery.
- Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.
- Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Kradword binary and related persistence hooks are eradicated.
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Kradword.
- Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.
- Do not connect clean backup drives or external storage to the affected network until Kradword eradication is completely verified.
References & External Analysis
- Search "kradword" on VirusTotal (External Analysis)
- Search "kradword" on Any.Run (Sandbox Sandbox)
- Search "kradword" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Kradword and what threat category does it belong to?
Kradword is classified as a Ransomware. 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 Kradword establish persistence and evade defensive controls?
Kradword 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 Kradword compromise?
Security teams responding to Kradword 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 cryptographic algorithms and file targeting techniques does Trojan.Kradword employ during execution?
Trojan.Kradword typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options.
Are decryptors available for Trojan.Kradword, and what is the recommended recovery procedure?
Decryption availability for Trojan.Kradword depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups.
How do I remove the Kradword Ransomware from Windows?
Manual removal of Kradword 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 Kradword a virus or a Ransomware?
Kradword is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Kradword typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Kradword infection?
Symptoms of Kradword 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 Ransomwares
Want to prevent Kradword and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Containment & Incident Response.
📣 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/kradword.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.