EXECUTIVE SUMMARY:
Vidar is a well-known information-stealing malware that continues to evolve into a Malware-as-a-Service (MaaS) platform. In its iterations, it has expanded its operational capabilities beyond simple credential theft to support multi-stage infection chains and highly evasive data exfiltration techniques. The malware is widely used by actors to target Windows environments, focusing on harvesting sensitive information such as browser credentials, cryptocurrency wallets, session cookies, and authentication tokens. Its widespread availability in underground markets and modular design make it a persistent and scalable cyber threat.[/subscribe_to_unlock_form]
EXECUTIVE SUMMARY:
Vidar is a well-known information-stealing malware that continues to evolve into a Malware-as-a-Service (MaaS) platform. In its iterations, it has expanded its operational capabilities beyond simple credential theft to support multi-stage infection chains and highly evasive data exfiltration techniques. The malware is widely used by actors to target Windows environments, focusing on harvesting sensitive information such as browser credentials, cryptocurrency wallets, session cookies, and authentication tokens. Its widespread availability in underground markets and modular design make it a persistent and scalable cyber threat.[emaillocker id="1283"]
The Vidar campaigns demonstrate a multi-stage infection model that heavily relies on Windows executable files, dynamic-link libraries, and script-based loaders. Attack vectors typically include trojanized installers, phishing attachments, and archive files designed to bypass basic security filters. Once executed, Vidar deploys its payload through process injection, DLL sideloading, or PowerShell-based staging techniques. It is capable of extracting browser credentials, cryptocurrency wallet data, session cookies, and other sensitive artifacts stored on the host. The malware also exhibits infrastructure agility through frequent command-and-control (C2) rotation, using newly generated servers and domains to maintain resilience against takedowns. Additionally, newer variants show increased obfuscation and modular execution patterns, improving their ability to evade antivirus detection and maintain persistence within infected environments.
Vidar continues to represent a significant and evolving infostealer threat due to its flexible delivery mechanisms, stealth capabilities, and rapidly changing infrastructure. Its consistent adaptation to defensive measures, combined with widespread use in cybercrime ecosystems, makes it a persistent risk for both individual users and enterprise environments. Strengthening endpoint protection, monitoring script execution, and enforcing strict email and download hygiene remain essential to mitigating exposure to such threats.
THREAT PROFILE:
| Tactic | Technique Id | Technique | Sub-technique |
| Initial Access | T1566.001 | Phishing | Spearphishing Attachment |
| T1566.002 | Spearphishing Link | ||
| T1189 | Drive-by Compromise | - | |
| Execution | T1204.002 | User Execution | Malicious File |
| Persistence | T1112 | Modify Registry | - |
| Stealth | T1027.002 | Obfuscated Files or Information | Software Packing |
| T1027.005 | Indicator Removal from Tools | ||
| T1027.009 | Embedded Payloads | ||
| T1036.001 | Masquerading | Invalid Code Signature | |
| T1036.005 | Match Legitimate Resource Name or Location | ||
| T1036.008 | Masquerade File Type | ||
| T1140 | Deobfuscate/Decode Files or Information | - | |
| Credential Access | T1555.003 | Credentials from Password Stores | Credentials from Web Browsers |
| T1555.005 | Password Managers | ||
| T1539 | Steal Web Session Cookie | - | |
| T1552.001 | Unsecured Credentials | Credentials in Files | |
| Discovery | T1083 | File and Directory Discovery | - |
| T1082 | System Information Discovery | - | |
| T1518.001 | Software Discovery | Security Software Discovery | |
| T1010 | Application Window Discovery | - | |
| T1217 | Browser Information Discovery | - | |
| Collection | T1005 | Data from Local System | - |
| T1113 | Screen Capture | - | |
| T1114.001 | Email Collection | Local Email Collection | |
| Command and Control | T1071.001 | Application Layer Protocol | Web Protocols |
| T1132.001 | Data Encoding | Standard Encoding | |
| T1568.003 | Dynamic Resolution | DNS Calculation | |
| T1102.002 | Web Service | Bidirectional Communication | |
| T1573.002 | Encrypted Channel | Asymmetric Cryptography | |
| Exfiltration | T1041 | Exfiltration Over C2 Channel | - |
| T1020.001 | Automated Exfiltration | Traffic Duplication | |
| T1030 | Data Transfer Size Limits | - | |
| Impact | T1565.001 | Data Manipulation | Stored Data Manipulation |
MBC MAPPING:
| Objective | Behaviour ID | Behaviour |
| Anti-Behavioral Analysis | B0001 | Debugger Detection |
| Anti-Static Analysis | B0032 | Executable Code Obfuscation |
| B0012 | Disassembler Evasion | |
| Collection | E1113 | Screen Capture |
| E1056 | Input Capture | |
| Command and Control | B0030 | C2 Communication |
| B0031 | Domain Name Generation | |
| Credential Access | B0028 | Cryptocurrency |
| Defense Evasion | F0001 | Software Packing |
| F0004 | Disable or Evade Security Tools | |
| E1027 | Obfuscated Files or Information | |
| F0015 | Hijack Execution Flow | |
| B0025 | Conditional Execution | |
| Discovery | E1082 | System Information Discovery |
| E1083 | File and Directory Discovery | |
| B0013 | Analysis Tool Discovery | |
| Execution | E1059 | Command and Scripting Interpreter |
| Exfiltration | E1020 | Automated Exfiltration |
| Impact | E1486 | Data Encrypted for Impact |
| Persistence | E1112 | Modify Registry |
| F0012 | Registry Run Keys / Startup Folder | |
| Privilege Escalation | E1055 | Process Injection |
REFERENCES:
The following reports contain further technical details:
https://www.darkreading.com/vulnerabilities-threats/vidar-top-chaotic-infostealer-market
https://www.intrinsec.com/wp-content/uploads/2026/04/TLP_CLEAR-20260424-New_Vidar.pdf
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