Doppelgänger Info Ops in Europe & US

Mid-year Doppelgänger Information Operations in Europe and the US

Identifier: TRR240701
Published on 25 July 2024 | Read Time: 54 min

In recent months, observers and threat-intelligence analysts have witnessed a dramatic escalation in sophisticated disinformation campaigns in Europe and the United States. These campaigns, classified as Doppelgänger information operations, leverage novel infrastructure techniques, multi-layer redirection chains, and bot-driven social media propagation to manipulate narratives and influence public opinion. In this post, we delve into the technical details behind these operations, exploring everything from infrastructure observations to code samples for analysis. Whether you’re a cybersecurity beginner or an advanced researcher, this guide will provide valuable insights into these evolving threats and demonstrate how to detect, analyze, and defend against them.

Introduction
Understanding Doppelgänger Information Operations
Disinformation Techniques and the (Dis)information Chain
Infrastructure Observations
- 1st Level Redirectors
- 2nd Level Redirectors
Social Media and Bot Networks
Real-World Examples and Case Studies
Defensive Measures and Security Best Practices
Code Samples: Scanning and Parsing Doppelgänger Infrastructure
- Bash/Curl Scanning Example
- Parsing Output with Python
Conclusion
References

Introduction

Modern disinformation campaigns have evolved far beyond simple fake news websites or deceptive social media posts. The recent mid-year operations—conducted predominantly by Russian actors—exemplify a refined modus operandi dubbed the "Doppelgänger" distribution method. These operations have been extensively monitored in relation to recent political events such as France’s snap general election in June 2024.

In this blog post, we break down:

The key components of Doppelgänger operations
The chain of information dissemination
How infrastructure assets are rotated and obfuscated
The use of bot networks to artificially inflate engagement
Detailed technical insights to help defenders detect and counter these campaigns

For organizations involved in Cyber Threat Intelligence (CTI), having an in-depth understanding of these mechanisms is critical to mitigating risks and protecting democratic processes against manipulation.

Understanding Doppelgänger Information Operations

Doppelgänger operations refer to coordinated information manipulation campaigns that:

Impersonate reputable news websites: Designed to give content an aura of legitimacy.
Exploit social media and digital platforms: Utilizing automated bots, particularly on platforms like X/Twitter, to disseminate misleading content.
Leverage redirection chains: To obscure the origin of the content and hinder real-time detection and analysis.

The term “Doppelgänger” is used broadly in public research to describe:

The fake personas, bots, and websites used in these operations.
The underlying infrastructure that supports these operations.
The tactics that enable content to evade traditional security measures and reach targeted audiences.

The emergence of these campaigns, particularly in the wake of unexpected political events, underscores the urgency for cybersecurity professionals to innovate and adapt their analytical methods.

Disinformation Techniques and the (Dis)information Chain

At the heart of Doppelgänger operations is a meticulously crafted (dis)information chain comprising several layers, which makes the final source of the content difficult to identify.

Key Elements of the (Dis)information Chain

Social Network Posts:
- The campaigns typically begin on social platforms (e.g., X/Twitter), where bots post unique links.
- The accounts often appear as cryptocurrency or Web3 influencers, with high engagement metrics seemingly boosted by artificial means.
1st Level Redirectors:
- These are URLs that immediately redirect users to the next layer.
- The design involves short, randomized URLs registered on new generic top-level domains (gTLDs) like .click, .top, or .shop.
2nd Level Redirectors:
- Once the user lands on the first page, they are forwarded to another page (the 2nd level redirector) that may further obfuscate the landing page.
- These pages may contain additional JavaScript obfuscation and meaningless placeholder content meant to confuse both human viewers and automated scanners.
Final Destination:
- The final page is the target content, which might contain fabricated narratives or manipulated messages aligning with the objectives of Russian state interests.

Visualizing the Information Flow Chain

Below is a simplified diagram representing the (dis)information chain:

Social Media Post (X/Twitter) 
       │
       ▼
1st Level Redirector (Randomized URL)
       │      (Obfuscated HTML, Meta Tag redirects)
       ▼
2nd Level Redirector (Additional obfuscation)
       │
       ▼
Final Content Website (Disinformation / Impersonated News Site)

Understanding each layer is essential for threat hunters and CTI analysts to detect and neutralize these campaigns effectively.

Infrastructure Observations

One of the defining characteristics of Doppelgänger operations is the continuous rotation and obfuscation of the infrastructure driving the campaign. Operators deliberately change domain names, adopt randomized URL patterns, and use low-cost or recently registered domain names, making mitigation a challenging task.

1st Level Redirectors

Characteristics:

Dynamic URL Patterns:
The URLs generally adhere to patterns such as:
• http(s)://<5-6 random characters>.⁄<6 random characters>
• http(s):///<6 random characters>
Registration Trends:
Domains are frequently registered on recent top-level domains (TLDs) like .click, .top, or .shop.
Server Details:
In many observed cases, these domains resolve to IP addresses running a combination of:
- OpenSSH on port 22
- OpenResty + PHP 7 on ports 80 and 443
  The servers typically expose self-signed certificates and default server metadata, contributing to the anarchic infrastructure footprint.

Example HTML from a 1st Level Redirector:

<!DOCTYPE html>
<html>
  <head>
    <title>Citizenship Doesn't Matter If You Support Biden</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="twitter:card" content="summary_large_image">
    <meta property="og:title" content="Citizenship Doesn't Matter If You Support Biden"/>
    <meta property="og:description" content="Republicans are trying to rush a bill through Congress to allow only U.S. citizens to vote in presidential elections."/>
    <meta property="og:image" content="https://telegra.ph/file/d1629e477f84abbc37dbc.jpg">
    <meta http-equiv='refresh' content='0; url=hxxp://vickypitner[.]com/wash9261378'>
  </head>
  <body>
    <script type="text/javascript">
      var _0xc80e=["","split", ... ,91,"xAkdhqbIQ",45,7,10];
      document.body.style.color = "white";
    </script>
    <div>
      принц-регент – А кто занимается похоронами? Не вы? каганец натуралистичность предъявитель эталонирование ...
    </div>
  </body>
</html>

2nd Level Redirectors

Characteristics:

Custom HTML and Meta Tags:
These pages rely on similar redirection techniques, now using HTTP meta refresh tags or JavaScript redirects to funnel traffic to the final destination.
Obfuscation Tactics:
The HTML content contains extraneous text and code designed to distract or confuse accidental viewers or automated scraping tools.

Example HTML from a 2nd Level Redirector:

<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="robots" content="noindex, nofollow">
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>with their hippopotamus.</title>
  <!-- Additional obfuscated content -->
</head>
<body>
  <div class="header">
    <h1>Website Header</h1>
    <a href="page2.html">Page 2</a>
  </div>
  <!-- Truncated further content -->
</body>
</html>

Through active monitoring from mid-May to late-July 2024, researchers identified thousands of such URLs across hundreds of domain names, each systematically deployed to complicate the analysis of malicious traffic and to evade detection.

Social media platforms—particularly X/Twitter—play a pivotal role in amplifying Doppelgänger operations. Here’s how:

Bot-Driven Dissemination:
- Over 800 suspect accounts were detected, all posting direct links to 1st level redirectors.
- These bots often operate under the guise of popular influencers in the cryptocurrency and Web3 niches.
- The posts feature high engagement numbers despite relatively low follower counts, suggesting artificial inflation.
Language Variety and Content Uniqueness:
The bots deploy posts in multiple languages, including English, French, German, Polish, and Ukrainian. This multilingual approach increases the likelihood of widespread international reach.
Misdirection and Alternative Campaigns:
In one notable incident, an account linked to Doppelgänger operations posted an AI-generated music video impersonating the band Little Big. The video satirized the Paris Olympics and questioned the efficacy of attendance, demonstrating how disinformation campaigns can mix satire with political influence operations.

Implications for Cybersecurity

Detection Challenges:
Traditional tools may flag uniform posts as spam; however, the differentiation in content and language calls for more sophisticated detection methods.
Bot Rental or Dual-Use:
The likelihood that Doppelgänger operations are either renting Twitter bots from third parties or overlapping with cybercriminal activities for cryptocurrency scams complicates attribution and mitigation efforts.

For cybersecurity teams, understanding the interplay between these bot networks and the underlying disinformation chain is essential. Targeted threat hunting using network traffic analysis, behavioral analysis, and comprehensive threat intelligence feeds is crucial.

Real-World Examples and Case Studies

The Doppelgänger operations observed during this period offer several actionable insights:

Case Study 1: The French Snap Election Campaign

Context:
The sudden snap general election in France in June 2024 served as a catalyst for intensified Doppelgänger campaigns. French-specific narratives were propagated, leveraging localized language and culturally relevant fake news links.

Observations:

Bots posting URLs with French-language metadata.
Spanish and German variants were also identified, hinting at a broader European strategy.
The redirection chain remained consistent, with swift transitions from 1st to 2nd level redirectors, before reaching content targeting political sentiment.

Analysis:
The operation illustrated an adaptive use of domain registration tactics and redirection chaining that enabled the quick pivoting of narratives in response to political events.

Case Study 2: Misuse of AI-Generated Content

Context:
During routine network monitoring, a suspicious AI-generated video emerged that parodied the Paris Olympics. This content, while humorous on the surface, was designed to undermine public enthusiasm for major events, ultimately advancing political and social agendas.

Observations:

The video was disseminated via seemingly benign influencer accounts.
Despite the satirical nature, the underlying message was clear: discrediting public institutions through the lens of absurdity.

Analysis:
This case underlines the importance of combining content analysis with behavior analysis. While the video format (music video parody) might elude traditional textual detection systems, its distribution architecture clearly fell within the Doppelgänger pattern.

These real-world examples exemplify the multifaceted challenges that modern disinformation campaigns pose, requiring coordinated efforts between cybersecurity firms, government agencies, and social media platforms.

Defensive Measures and Security Best Practices

1. Threat Intelligence Integration

Utilize Multiple Sources:
Combine data from public threat feeds, proprietary intelligence, and academic research to maintain a current picture of Doppelgänger operations.
Automated Alerts:
Deploy SIEM (Security Information and Event Management) systems configured with threat patterns (such as YARA rules and Sigma signatures) to flag known Doppelgänger infrastructure signatures.

2. Network Traffic Analysis

Deep Packet Inspection (DPI):
DPI can help identify irregularities in HTTP headers, unusual meta tag usage, and rapid redirection patterns typical of these campaigns.
SSL/TLS Certificate Monitoring:
Track and analyze certificates, particularly self-signed ones exhibiting default issuer data common among Doppelgänger-related servers.

3. Endpoint Security and Behavior Analysis

Advanced EDR/EPP Integration:
Utilize Endpoint Detection & Response (EDR) and Endpoint Protection Platforms (EPP) to monitor and analyze seemingly benign processes that may be linked to Doppelgänger’s bot activities.
AI-Driven Analysis:
Modern cybersecurity platforms, such as HarfangLab’s offerings, incorporate AI engines to correlate unusual system behaviors with known Doppelgänger TTPs (Tactics, Techniques, and Procedures).

Training Programs:
Regular cybersecurity education focused on digital literacy can help end-users identify suspicious links and recognize manipulated content.
Platform Cooperation:
Collaboration with social media companies (e.g., Meta and Twitter) can lead to faster takedowns of accounts engaged in disinformation propagation.

By deploying a layered strategy that includes threat intelligence, network analysis, endpoint protection, and user awareness, organizations can better defend against advanced information operations.

Code Samples: Scanning and Parsing Doppelgänger Infrastructure

Below, we provide practical code examples to help analysts and researchers scan for Doppelgänger-related URLs and parse output from redirection pages.

Bash/Curl Scanning Example

This Bash script uses curl to scan a list of suspected 1st level redirector URLs and extract meta refresh redirects:

#!/bin/bash
# scan_redirects.sh
# This script scans a list of URLs and extracts meta refresh tags
# Usage: ./scan_redirects.sh urls.txt

if [ $# -ne 1 ]; then
  echo "Usage: $0 <urls_file>"
  exit 1
fi

URLS_FILE="$1"

if [ ! -f "$URLS_FILE" ]; then
  echo "File $URLS_FILE does not exist."
  exit 1
fi

while IFS= read -r url; do
  echo "Scanning URL: $url"
  # Fetch page content and grep for meta refresh content
  meta=$(curl -sL "$url" | grep -i "meta http-equiv='refresh'")
  
  if [ -z "$meta" ]; then
    echo "No meta refresh found for $url"
  else
    echo "Found meta refresh: $meta"
  fi
  echo "---------------------------------------"
done < "$URLS_FILE"

How It Works:

The script reads a file containing suspected URLs.
For each URL, it fetches the webpage content.
It searches for meta refresh tags that signal redirection.
Administrators can modify the script to further analyze redirection layers.

Parsing Output with Python

The following Python script parses a simple HTML file to extract redirection URLs and prints them. This can be extended as part of a larger analysis pipeline.

#!/usr/bin/env python3
import re
import requests
from bs4 import BeautifulSoup

def fetch_html(url):
    try:
        response = requests.get(url, timeout=10)
        response.raise_for_status()
        return response.text
    except Exception as e:
        print(f"Error fetching {url}: {e}")
        return ""

def extract_redirect_url(html):
    soup = BeautifulSoup(html, 'html.parser')
    # Look for meta refresh tag
    meta = soup.find('meta', attrs={'http-equiv': re.compile('refresh', re.I)})
    if meta:
        content = meta.get('content', '')
        # The content usually contains something like "0; url=hxxp://example.com"
        match = re.search(r"url=(.*)", content, re.IGNORECASE)
        if match:
            return match.group(1).strip()
    return None

def main():
    urls = [
        "http://example-redirect1.com/xyz123",
        "http://example-redirect2.com/abc456"
    ]
    
    for url in urls:
        print(f"Fetching URL: {url}")
        html = fetch_html(url)
        if html:
            redirect_url = extract_redirect_url(html)
            if redirect_url:
                print(f"Redirect URL: {redirect_url}")
            else:
                print("No redirect meta tag found.")
        print("-" * 50)

if __name__ == "__main__":
    main()

Explanation:

The script uses the requests library to fetch page content.
It leverages BeautifulSoup to parse HTML and look for meta refresh tags.
It extracts and prints the final destination URL if it finds a redirection tag.
Analysts can integrate this script into a larger monitoring system to flag suspicious redirect chains.

By incorporating these code samples into your cybersecurity toolkit, you can automate parts of the investigative process—making it easier to track and mitigate Doppelgänger infrastructure.

Conclusion

The mid-year Doppelgänger information operations showcase the evolving nature of modern disinformation campaigns. By employing advanced redirection chains, dynamic bot networks, and rapidly rotating infrastructure, these operations remain a potent threat to both political processes and public trust. Understanding the technical details behind these campaigns—from their multi-layered web redirection to the use of AI-generated media—is crucial for effective threat mitigation.

Cybersecurity professionals must stay vigilant and leverage a holistic approach that combines threat intelligence, network analysis, robust endpoint protection, and public awareness campaigns. As disinformation methods continue to evolve, so too must our defenses, ensuring that information integrity remains a cornerstone of a secure digital society.

We hope this deep-dive has provided valuable insights and practical guidance for defending against such advanced operations. Stay tuned to our blog for further updates and more case studies on cybersecurity threats and defense strategies.

References

For further reading about detecting and mitigating disinformation campaigns and detailed threat reports, please visit the official blogs and resource pages of cybersecurity leaders and government agencies.

By staying informed and implementing robust detection mechanisms, cybersecurity practitioners can counter these emerging threats and help secure the integrity of information ecosystems both in Europe, the US, and beyond.

Doppelgänger Info Ops in Europe & US – Mid-Year 2024