Sathurbot
Table of Contents
Overview
Trojan:Win32/Sathurbot is a sophisticated botnet agent known for its unique propagation and Command and Control (C2) methods. Unlike bots that rely solely on email spam, Sathurbot actively utilizes torrents and compromised WordPress sites to distribute itself (`T1189`), and leverages legitimate search engines or peer-to-peer mechanisms for resilience (`T1071.001`).
Understanding Sathurbot (Botnet Architecture)
To an end-user, the infection is silent, though their internet connection may seem saturated. For a SOC analyst, a Sathurbot detection indicates the machine has been drafted into a global criminal network. It will be used to scrape the web for vulnerable CMS sites, perform brute-force attacks, or seed malicious torrents to infect others.
Execution and Propagation Mechanics
Sathurbot frequently arrives bundled within cracked software or pirated movies downloaded via torrents (`T1204.002`). Once executed, it establishes persistence and immediately begins communicating with its C2 infrastructure. Sathurbot is notable for using heavily obfuscated, multi-stage loading to evade detection (`T1027`). Once integrated into the botnet, the infected machine receives 'jobs'. These jobs often involve performing automated Google or Bing searches to find WordPress sites, and then launching dictionary attacks (`T1110`) against their login pages to expand the botnet's infrastructure.
Indicators of Compromise & Impact
The impact includes the consumption of network resources and the legal liability of the endpoint participating in attacks against third parties. Host-based IoCs include high CPU usage (during brute-force tasks) and the presence of unknown executables in the `%AppData%` directory. Network IoCs are highly distinct: an infected host will generate massive amounts of automated traffic to search engines, followed by numerous HTTP POST requests (login attempts) to `wp-login.php` pages on hundreds of unrelated domains.
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 |
|---|---|---|---|
T1110 | Brute Force (The botnet's primary method for compromising new WordPress sites) | Credential Access | ATT&CK ↗ |
T1189 | Drive-by Compromise (Using compromised sites and torrents to spread) | Initial Access | ATT&CK ↗ |
T1071.001 | Application Layer Protocol: Web Protocols (Using HTTP/HTTPS for C2 and attacks) | Command and Control | ATT&CK ↗ |
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1071.001: Implement web filtering and SSL/TLS inspection to detect malicious command and control (C2) traffic hiding in HTTP/HTTPS.
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-WAF | Web Content Filtering & Inspection | Filter | T1071.001 | Block newly registered domains (NRDs) and inspect HTTP Host and URI headers for known C2 profiles. |
D3-AL | Account Lockout Policy | Harden | T1110 | Enforce progressive rate limiting and account lockout policies to prevent credential brute-force attacks. |
D3-RBI | Remote Browser Isolation | Isolate | T1189 | Execute untrusted web browsing sessions in disposable cloud containers to isolate drive-by exploits from local endpoints. |
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_SATHURBOT_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Sathurbot"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "sathurbot" 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 - Sathurbot (Trojan) Execution & Triage
id: 649ca7aa-8782-5ab6-8df2-230ebecfb624
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Sathurbot 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/sathurbot
- 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.t1110
- attack.t1189
- attack.t1071_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_SATHURBOT_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Sathurbot 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 = "sathurbot" 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.
- Isolate the endpoint from the network to stop it from participating in brute-force attacks against external infrastructure.
- Analyze EDR logs to identify the initial executable (likely downloaded via a torrent client) that launched the Sathurbot agent.
- Review DNS logs to identify the C2 domains providing instructions to the bot, and block them.
- Ensure endpoint AV signatures are updated and run a full system scan to remove the persistent bot components.
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not ignore 'abuse' emails from ISPs regarding your IP address performing brute-force attacks; this is a primary indicator of a Sathurbot infection.
- Avoid relying solely on blocking the target IPs the bot is attacking; the C2 server will simply issue new targets.
References & External Analysis
- Search "sathurbot" on VirusTotal (External Analysis)
- Search "sathurbot" on Any.Run (Sandbox Sandbox)
- Search "sathurbot" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Sathurbot and what threat category does it belong to?
Sathurbot 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 Sathurbot establish persistence and evade defensive controls?
Sathurbot 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 Sathurbot compromise?
Security teams responding to Sathurbot 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 Sathurbot?
Sathurbot 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 Sathurbot across enterprise endpoints?
Defenders should hunt for Sathurbot 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 the Sathurbot Trojan from Windows?
Manual removal of Sathurbot 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 Sathurbot a virus or a Trojan?
Sathurbot is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Sathurbot typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Sathurbot infection?
Symptoms of Sathurbot 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 Sathurbot 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
Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/sathurbot.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.