Buhtrap

Overview

Executive Summary

Technical Capabilities and Attack Lifecycle

• Initial Access & Reconnaissance: After initial compromise via an exploit, the attackers deploy lightweight reconnaissance tools to map the internal network and identify key financial servers and administrator workstations.
• Lateral Movement: Buhtrap heavily utilizes legitimate administrative tools—living off the land (LotL)—such as PowerShell, Windows Management Instrumentation (WMI), and PsExec to move laterally without triggering malware alerts.
• Custom Tooling: For the final stage, Buhtrap operators deploy custom-built trojans designed to record the screens and keystrokes of bank employees tasked with authorizing large financial transfers.
• Direct Financial Theft: By studying the internal banking workflows, attackers use Buhtrap to generate fraudulent payment orders directly within the bank's internal systems (like the Russian ARM KBR system) and route funds to offshore accounts.

Threat Impact

Defense and Resilience Strategies

• Strict Network Segmentation: Payment gateways and SWIFT infrastructure must be heavily segmented from the general corporate network, with strict access control lists (ACLs) and no direct internet access.
• Privileged Access Management (PAM): Implement strict PAM policies. Administrative accounts should only be used from dedicated, hardened jump servers, and all actions must be heavily audited.
• Behavioral Analytics: Deploy advanced SIEM and EDR solutions tuned to detect the unauthorized use of administrative tools (LotL techniques) and anomalous lateral movement patterns within the network.

Known aliases

Threat reports may refer to this family under multiple names:

• APT.Buhtrap
• Trojan.Buhtrap
• Win32/Buhtrap

MITRE ATT&CK Techniques

This family has been observed using the following ATT&CK techniques: T1566.001 T1047 T1059.001 T1563

Tactical Mitigations

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

• T1059.001: Restrict execution of PowerShell. Enforce PowerShell Constrained Language Mode and Script Block Logging.
• T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.

Generated Detections (Boilerplate)

These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.

YARA Rule

rule MALWARE_WIN_BUHTRAP {
    meta:
        description = "Detects Buhtrap (ransomware)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "buhtrap" ascii wide nocase
        $s2 = "apt.buhtrap" ascii wide nocase
        $s3 = "trojan.buhtrap" ascii wide nocase
        $s4 = "win32/buhtrap" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Buhtrap Activity
id: eee11f3999f62c182308860cf21b7c94
status: experimental
description: Detects generic indicators of the buhtrap malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*buhtrap*"
            - "*apt.buhtrap*"
            - "*trojan.buhtrap*"
            - "*win32/buhtrap*"
    condition: selection
level: medium

References & External Analysis

• Search "buhtrap" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: ransomware)

Explore other malware families in the same category:

• Zapinit
• Hiru
• Avira
• Antavmu
• Pcclean

Machine-readable

Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/buhtrap.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.