Bototer

Category: trojan · Aliases: Trojan.Bototer, Botnet.Bototer, Win32/Bototer · Sample count (EMBER 2018): 1 · Enrichment: insufficient_information · Updated: 2026-07-01T16:25:49Z

Category: TrojanActor: Unknown / CybercriminalIndustry: Global / OpportunisticMotivation: Opportunistic

Overview

Executive Summary

Bototer is a malicious Trojan designed to subvert infected Windows endpoints, forcing them into a distributed botnet controlled by remote threat actors. Once enslaved, the compromised machine is utilized in coordinated malicious campaigns, ranging from massive Distributed Denial of Service (DDoS) attacks to the mass distribution of spam and phishing emails.

Infection Vector and Technical Capabilities

Bototer is typically distributed via drive-by downloads originating from compromised websites, or bundled within pirated software and key generators found on peer-to-peer (P2P) networks. Upon execution, Bototer immediately attempts to establish stealth and connectivity:

C2 Beaconing: The malware reaches out to a hardcoded list of command-and-control (C2) servers, or utilizes a Domain Generation Algorithm (DGA) to find active controllers, registering the newly infected host with the botnet herder.
Persistence and Stealth: Bototer modifies the Windows Registry to ensure execution upon boot and frequently injects its core communication threads into legitimate processes (like `explorer.exe`) to evade local firewalls.
Task Execution: The infected host enters a listening state, awaiting commands. Typical commands include participating in UDP/TCP flood DDoS attacks against specific targets, downloading additional malware, or acting as an open proxy for the attacker.

Threat Impact

A Bototer infection introduces significant legal and operational risks. Not only is the endpoint's bandwidth and CPU consumed by the botnet, but the organization's IP address may be blacklisted by ISPs and security vendors for participating in DDoS attacks or distributing spam.

Detection and Incident Response

Network Traffic Analysis: Monitor edge firewalls for persistent, high-volume outbound traffic to unknown IP addresses, particularly traffic that resembles DDoS flooding or unauthorized SMTP (Port 25) connections.
Endpoint Isolation: Instantly quarantine any endpoint demonstrating botnet beaconing behavior to prevent it from participating in coordinated attacks.
System Re-image: Because botnet malware often downloads secondary payloads (like rootkits) to ensure persistence, the most secure remediation strategy is a complete wipe and re-image of the compromised endpoint.

Known aliases

Threat reports may refer to this family under multiple names:

MITRE ATT&CK Techniques

This family has been observed using the following ATT&CK techniques: T1059 T1105 T1498 T1090

Tactical Mitigations

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

T1059: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.

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

Sigma Rule

title: Suspicious Bototer Activity
id: 8db31a9233f1c0c50279f442330aa244
status: experimental
description: Detects generic indicators of the bototer malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*bototer*"
            - "*trojan.bototer*"
            - "*botnet.bototer*"
            - "*win32/bototer*"
    condition: selection
level: medium

References & External Analysis

Search "bototer" on VirusTotal (External Analysis)

Frequently Asked Questions

How do I remove the Bototer Trojan from Windows?

Manual removal of Bototer 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 Bototer a virus or a Trojan?

Bototer is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Bototer typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.

What are the main symptoms of a Bototer infection?

Symptoms of Bototer 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.

Related Families (Category: trojan)

Explore other malware families in the same category:

Protect Your Network Against Trojans

Want to prevent Bototer and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection.

Need help with an active incident? Published by the SystemHelpdesk team.

Machine-readable

Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/bototer.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.