Fareitvb
Table of Contents
Overview
PWS:Win32/Fareitvb is a specific variant of the infamous **Fareit** (also known as **Pony**) infostealer family, notable for being rewritten or wrapped in Visual Basic (VB). Historically, Fareit is one of the most prolific credential stealers and botnet loaders in existence. It was frequently utilized by advanced threat groups to harvest FTP credentials, email passwords, and cryptocurrency wallets, and was notoriously used to drop the massive Gameover Zeus banking trojan.
Understanding the Fareit/Pony Threat
To an end-user, the infection is typically invisible. The malware executes rapidly, steals data, and often deletes itself. For a security operations center (SOC), a Fareitvb detection is a critical emergency. It means all passwords, session cookies, and VPN credentials stored on that machine are compromised, providing attackers with immediate, authenticated access to the corporate network.
Execution and Harvesting Mechanics
Fareitvb is typically distributed via weaponized spam campaigns containing malicious Office documents or ZIP files (`T1566`). The Visual Basic wrapper is often used as a packing layer to obfuscate the core malicious logic from static antivirus signatures (`T1027`). Upon execution (`T1204.002`), the malware targets a vast array of software. It extracts stored credentials from over 100 different applications, including all major web browsers (Chrome, Firefox, Edge) (`T1555.003`), FTP clients (FileZilla, WinSCP), email clients (Outlook, Thunderbird), and cryptocurrency wallets (`T1552.001`). It archives this data and exfiltrates it to a C2 server via HTTP POST requests (`T1041`). Finally, it often acts as a downloader (`T1105`), pulling down secondary, high-severity payloads before terminating.
Indicators of Compromise & Impact
The primary impact is the total compromise of all credentials stored on the endpoint and the potential for immediate lateral movement by the attackers. Host-based IoCs include EDR alerts for rapid, sequential file access of multiple SQLite databases (`Login Data`) across browser directories. Network IoCs include a sudden, short burst of outbound HTTP traffic to an unknown IP address or compromised domain, followed immediately by a secondary download.
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 |
|---|---|---|---|
T1555.003 | Credentials from Password Stores: Credentials from Web Browsers | Credential Access | ATT&CK ↗ |
T1552.001 | Credentials In Files (Stealing FTP and Wallet files) | Credential Access | ATT&CK ↗ |
T1041 | Exfiltration Over C2 Channel | Exfiltration | ATT&CK ↗ |
T1105 | Ingress Tool Transfer (Downloading Gameover Zeus or ransomware) | Command and Control | ATT&CK ↗ |
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.
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-EAF | Egress Analysis and Filtering | Isolate | T1041 | Enforce perimeter TLS inspection and alert on anomalous outbound data volume ratios transmitting over active C2 channels. |
D3-NTI | Network Traffic Inspection | Detect | T1105 | Inspect deep packet payloads for anomalous staging binaries and unauthorized egress protocols. |
D3-FPA | File Permission Auditing | Harden | T1552.001 | Scan filesystem repositories for plaintext configuration files and restrict access via Least Privilege RBAC controls. |
D3-CVH | Credential Vault Hardening | Harden | T1555.003 | Enable DPAPI master key audit logging and isolate browser SQLite database files within virtualization-based security containers. |
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_FAREITVB_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Fareitvb"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "fareitvb" 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 - Fareitvb (Trojan) Execution & Triage
id: 4e6dfe06-734c-5580-94ff-aab428ee90f5
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Fareitvb malware family. Detects suspicious execution from temporary user
directories with hidden window flags and background transfer utilities.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/fareitvb
- https://malware-families-catalog.systemhelpdesk.com/defensive/downloader-dropper-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.trojan
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1041
- attack.t1555_003
- attack.t1105
- attack.t1552_001
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \cmd.exe
- \powershell.exe
- \cscript.exe
- \wscript.exe
CommandLine|contains:
- AppData\Local\Temp
- -WindowStyle Hidden
- /e:jscript
- bitsadmin /transfer
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: mediumTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_FAREITVB_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Fareitvb 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 = "fareitvb" 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.
- Assume all credentials, session cookies, and VPN tokens stored on the compromised endpoint have been stolen by the adversary.
- Immediately force a password reset for all corporate accounts associated with the user, and revoke all active session tokens.
- Isolate the endpoint and deploy EDR to determine if Fareitvb successfully downloaded a secondary payload (like a banking trojan or ransomware) before being detected.
- Reimage the infected machine completely, as infostealers often leave persistent backdoors.
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not allow the user back onto the corporate network simply by changing their password; the stolen session cookies can bypass MFA.
- Avoid assuming the threat is gone because the AV deleted the initial executable; Fareit is a 'grab-and-go' threat that finishes its theft in seconds.
References & External Analysis
- Search "fareitvb" on VirusTotal (External Analysis)
- Search "fareitvb" on Any.Run (Sandbox Sandbox)
- Search "fareitvb" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Fareitvb and what threat category does it belong to?
Fareitvb is classified as a Trojan. 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 Fareitvb establish persistence and evade defensive controls?
Fareitvb 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 Fareitvb compromise?
Security teams responding to Fareitvb 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 secondary payloads and staging behaviors are commonly associated with Fareitvb?
Fareitvb frequently operates as a loader or dropper designed to establish a foothold before downloading and executing secondary high-impact malware payloads. Depending on the threat actor's objectives, these dropped modules can range from ransomware and banking injects to modular infostealers and remote management backdoors.
How can security operations teams effectively detect and hunt for Fareitvb across enterprise endpoints?
Defenders should hunt for Fareitvb by deploying behavioral endpoint detection and response (EDR) rules that monitor suspicious process spawning (such as cmd.exe or powershell.exe spawned from office documents or temporary directories), anomalous outbound network connections from non-browser binaries, and unauthorized modifications to Windows Run keys and scheduled task registries.
How do I remove Fareitvb from Windows?
Manual removal of Fareitvb 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.
What are the main symptoms of a Fareitvb infection?
Symptoms of Fareitvb 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 Trojans
Want to prevent Fareitvb and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection for Businesses.
📣 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
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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.