Ubot
Overview
Executive Summary
UBot is a malicious Trojan designed to covertly infiltrate Windows systems, establish persistence, and act as a reliable downloader and botnet client for remote threat actors. It is frequently utilized in the initial stages of a cyberattack to gather system intelligence, facilitate the automated deployment of secondary malware payloads, or enlist the compromised machine into a distributed botnet for coordinated attacks.Infection Vector and Technical Capabilities
UBot is predominantly distributed through socially engineered spam campaigns containing malicious attachments (often weaponized PDFs or Office documents utilizing macro exploits) or via compromised software installers downloaded from untrustworthy web portals. Upon successful execution, UBot operates with a focus on stealth and payload delivery:- System Reconnaissance: The trojan immediately collects detailed system information, including the OS version, installed software, Active Directory domain membership, and active antivirus solutions. This fingerprint is transmitted to a command-and-control (C2) server.
- Persistence: UBot ensures it survives system reboots by modifying the Windows Registry (e.g., adding entries to the `Run` or `RunOnce` keys) or by creating hidden Scheduled Tasks that execute the malware payload under high privileges.
- Botnet Enslavement: Acting as a botnet node, UBot receives instructions from the C2 server to silently download secondary malware, participate in DDoS attacks, or serve as a proxy for malicious traffic, providing the attacker with a flexible platform for abuse.
Threat Assessment
A UBot infection represents a significant breach of the endpoint perimeter. Because it provides remote attackers with the ability to execute arbitrary code, a single compromised machine can rapidly be utilized to pivot laterally, compromise the corporate network, or be used to attack external targets.Remediation and Eradication
- Endpoint Detection and Response (EDR): Configure EDR solutions to monitor for anomalous registry modifications and unauthorized outbound network connections to unknown IP addresses.
- Network Isolation and Sweeps: Immediately isolate the infected endpoint from the LAN. Conduct a thorough forensic sweep to identify not only the UBot executable but also any secondary payloads it may have successfully deployed.
- Total Re-imaging: Given its botnet capabilities and potential for deep system hooking, rebuilding the machine from a known-good baseline is highly recommended.
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: T1071 T1547.001 T1059
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.
- T1071: Monitor network traffic for anomalous application layer protocols like non-standard HTTP/S patterns or unexpected DNS requests.
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_UBOT {
meta:
description = "Detects Ubot (trojan)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "ubot" ascii wide nocase
$s2 = "trojan.ubot" ascii wide nocase
$s3 = "botnet.ubot" ascii wide nocase
$s4 = "win32/ubot" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Ubot Activity
id: 751dab5de44156620e6b1988c07ec200
status: experimental
description: Detects generic indicators of the ubot malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*ubot*"
- "*trojan.ubot*"
- "*botnet.ubot*"
- "*win32/ubot*"
condition: selection
level: mediumReferences & External Analysis
- Search "ubot" on VirusTotal (External Analysis)
Frequently Asked Questions
Where can I learn more about ubot?
Refer to the linked MITRE ATT&CK technique pages, which document the behaviors associated with this family.
How do I remove the Ubot Trojan from Windows?
Manual removal of Ubot 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 Ubot a virus or a Trojan?
Ubot is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Ubot typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Ubot infection?
Symptoms of Ubot 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)
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Protect Your Network Against Trojans
Want to prevent Ubot and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/ubot.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.