Turla

Overview

Turla (extensively documented in military and threat intelligence reporting under aliases such as Snake, Uroburos, Waterbug, and Venomous Bear) is an elite cyber espionage framework operated by the Russian Federal Security Service (FSB) 16th Center (Military Unit 71330). With roots tracing back to the landmark 2008 Agent.BTZ compromise of the US Department of Defense, Turla has conducted targeted cyber espionage for over 15 years against government ministries, embassies, military command facilities, and intelligence agencies across more than 50 countries. Turla is renowned for unprecedented technical sophistication: it pioneered high-altitude satellite internet downlink hijacking (intercepting unencrypted satellite DVB-S streams from commercial providers in Africa and the Middle East to mask its C2 servers), complex internal peer-to-peer (P2P) mesh communications between isolated subnet victim nodes, and kernel-level rootkits. In May 2023, the United States Department of Justice, the FBI, and intelligence partners across the Five Eyes alliance executed 'Operation MEDUSA'—a court-authorized operation that deployed the FBI-developed 'PERSEUS' tool to communicate with and remotely issue self-disabling commands to the FSB's flagship Snake implant network worldwide.

Known aliases

Threat reports may refer to this family under multiple names:

• Turla
• Snake
• Uroburos
• Waterbug
• Venomous Bear
• KRYPTON

Threat Actor Attribution

Attribution is probabilistic, not a science. Each link below states its confidence level and the evidence behind it.

• Russian FSB 16th Center (Military Unit 71330) / FBI Operation MEDUSA (May 2023) High confidence
  Basis: Joint advisory issued in May 2023 by CISA, FBI, NSA, UK NCSC, and Five Eyes partners formally attributing Snake/Turla to Center 16 of the Russian Federal Security Service (FSB), accompanied by the Operation MEDUSA court-authorized disruption. [source]

Family Pedigree & Lineage

Malware authors regularly fork and iterate upon existing codebases. Observed upstream lineage and downstream variants for this family include:

Derived From / Upstream Ancestry: Agent.Btz

Known Derivatives & Downstream Variants: Snake / Uroburos Rootkit · Carbon · Epic Turla · Gazer · Mosquito · Tinyturla (2021)

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

Tactical Mitigations

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

• T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Exploited Vulnerabilities (CVEs)

This malware family is documented weaponizing the following common vulnerabilities and exposures:

• CVE-2013-3346 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).
• CVE-2017-0199 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).
• CVE-2018-8453 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).

Command & Control (C2) and Network Profile

How this family talks to its operators. C2 traffic can often identify a family even when its code and configuration are hard to analyse. Ports and patterns are historical and change between campaigns, so use them as hunting leads rather than block-only rules.

Indicators of Compromise

Public indicators drawn from CISA advisories and vendor reporting. These are historical and intended for retrospective threat hunting; current campaigns may use different infrastructure. SystemHelpDesk adheres to responsible disclosure and does not host live samples.

File hashes (SHA-256, sample)

Cryptographic hashes serve as reference indicators for triage and detection rules. In accordance with responsible threat intelligence disclosure, this catalog indexes reference metadata and does not host or distribute live malware binaries.

• 0f62d1c9ad9a64797a731efc1b4cfb0cc5a1b5d12de1d668749a46995642456e
• 294ac5e533c37560d2b8feeb492f58cfcb6c3c6efec24bb93b22cfd8ccb05612

Delivery vectors

• Spear-phishing emails containing malicious documents targeting defense and foreign affairs ministries (CVE-2017-0199)
• Strategic web compromise (watering hole attacks) injecting malicious JavaScript into government web portals

Persistence mechanisms

• Kernel-mode drivers (.sys) registered as core Windows services
• Component Object Model (COM) hijacking and stealth memory injection into lsass.exe

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:

rule MALWARE_WIN_TURLA_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Turla"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "turla" ascii wide nocase
        $s2 = "turla" ascii wide nocase
        $s3 = "snake" ascii wide nocase
        $s4 = "uroburos" ascii wide nocase
        $s5 = "waterbug" ascii wide nocase
        $s6 = "venomous bear" ascii wide nocase
        $s7 = "krypton" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Turla (Advanced Threat) Execution & Triage
id: 47dedc18-c7f9-5f63-a2f9-0fe34f51a7ea
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Turla malware family. Detects proxy execution, reflective DLL loading,
  and remote command injection associated with modular enterprise backdoors.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/turla
- https://malware-families-catalog.systemhelpdesk.com/defensive/backdoor-rat-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.advanced-threat
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1055
- attack.t1542_003
- attack.t1071_001
- attack.t1071_004
- attack.t1546_015
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \powershell.exe
    - \cmd.exe
    - \rundll32.exe
    - \regsvr32.exe
    CommandLine|contains:
    - DownloadString
    - IEX(
    - '/s /n /u /i:'
    - sc create
    - start-process
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: high

rule MALWARE_WIN_TURLA_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Turla 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 = "turla" 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.

1. Assume total domain compromise. Turla operates with extreme stealth; if one endpoint is detected, they likely have entrenched rootkits across the network.
2. Engage a Tier-1 Incident Response retainer immediately; standard internal SOC teams are rarely equipped to hunt a top-tier Russian FSB unit.
3. Do NOT initiate remediation piecemeal; Turla will observe the cleanup efforts and deploy destructive wipers or deeper persistence mechanisms. Remediation must be coordinated and instantaneous.
4. Perform deep memory forensics (RAM dumps) on critical servers to detect the presence of the Uroburos/Snake kernel-level rootkits.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not alert the attackers by attempting to block their C2 domains prematurely; monitor their traffic to understand the full scope of the breach before executing a coordinated eviction.
2. Avoid relying on standard antivirus scans; Turla's tools operate below the OS layer and will return false negatives.

References & External Analysis

• US Department of Justice Press Release - Operation MEDUSA Snake Disruption
• CISA Joint Cybersecurity Advisory - Hunting Russian FSB Snake Malware
• MITRE ATT&CK - Turla (G0010)
• Search "turla" on VirusTotal (External Analysis)
• Search "turla" on Any.Run (Sandbox Sandbox)
• Search "turla" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Advanced Threat)

Explore other documented threats in the same operational category:

• Gamium
• Tinypos
• Marketscore
• Springtech
• Rpcdcom
• Cnsmin
• Podnuha
• Mediamagnet

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/turla.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.