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Introduction

Recently the attackers employed the CVE-2017-0199 vulnerability in Microsoft Office to deliver a fileless form of the Remcos RAT. The Remcos RAT makes the attacker have full control of the systems that have been infected by this malware. This research will give a detailed technical description of the identified vulnerability, attack vector, and tactics together with the practical steps to counter the identified risks.

The Targeted Malware: Remcos RAT

Remcos RAT (Remote Control & Surveillance) is a commercially available remote access tool designed for legitimate administrative use. However, it has been widely adopted by cybercriminals for its stealth and extensive control capabilities, enabling:

• System control and monitoring
• Keylogging
• Data exfiltration
• Execution of arbitrary commands

The fileless variant utilised in this campaign makes detection even more challenging by running entirely in system memory, leaving minimal forensic traces.

Attack Vector: Phishing with Malicious Excel Attachments

The phishing email will be sent which appears as legitimate business communication, such as a purchase order or invoice. This email contains an Excel attachment that is weaponized to exploit the CVE-2017-0199 vulnerability.

Technical Analysis: CVE-2017-0199 Exploitation

Vulnerability Assessment

• CVE-2017-0199 is a Remote Code Execution (RCE) vulnerability in Microsoft Office which uses Object Linking and Embedding (OLE) objects.
• Affected Components:some text
  • Microsoft Word
  • Microsoft Excel
  • WordPad
• CVSS Score: 7.8 (High Severity)

Mechanism of Exploitation

The vulnerability enables attackers to craft a malicious document when opened, it fetches and executes an external payload via an HTML Application (HTA) file. The execution process occurs without requiring user interaction beyond opening the document.

Detailed Exploitation Steps

1. Phishing Email and Malicious Document some text
   • The email contains an Excel file designed to make use of CVE-2017-0199.
   • When the email gets opened, the document automatically connects to a remote server (e.g., 192.3.220[.]22) to download an HTA file (cookienetbookinetcache.hta).
2. Execution via mshta.exe some text
   • The downloaded HTA file is executed using mshta.exe, a legitimate Windows process for running HTML Applications.
   • This execution is seamless and does not prompt the user, making the attack stealthy.
3. Multi-Layer Obfuscation some text
   • The HTA file is wrapped in several layers of scripting, including: some text
     • JavaScript
     • VBScript
     • PowerShell
   • This obfuscation helps evade static analysis by traditional antivirus solutions.
4. Fileless Payload Deployment some text
   • The downloaded executable leverages process hollowing to inject malicious code into legitimate system processes.
   • The Remcos RAT payload is loaded directly into memory, avoiding the creation of files on disk.

Fileless Malware Techniques

1. Process Hollowing
The attack replaces the memory of a legitimate process (e.g., explorer.exe) with the malicious Remcos RAT payload. This allows the malware to:

• Evade detection by blending into normal system activity.
• Run with the privileges of the hijacked process.

2. Anti-Analysis Techniques

• Anti-Debugging: Detects the presence of debugging tools and terminates malicious processes if found.
• Anti-VM and Sandbox Evasion: Ensures execution only on real systems to avoid detection during security analysis.

3. In-Memory Execution

• By running entirely in system memory, the malware avoids leaving artifacts on the disk, making forensic analysis and detection more challenging.

Capabilities of Remcos RAT

Once deployed, Remcos RAT provides attackers with a comprehensive suite of functionalities, including:

• Data Exfiltration: some text
  • Stealing system information, files, and credentials.
• Remote Execution: some text
  • Running arbitrary commands, scripts, and additional payloads.
• Surveillance: some text
  • Enabling the camera and microphone.
  • Capturing screen activity and clipboard contents.
• System Manipulation: some text
  • Modifying Windows Registry entries.
  • Controlling system services and processes.
  • Disabling user input devices (keyboard and mouse).

Advanced Phishing Techniques in Parallel Campaigns

1. DocuSign Abuse
Attackers exploit legitimate DocuSign APIs to create authentic-looking phishing invoices. These invoices can trick users into authorising payments or signing malicious documents, bypassing traditional email security systems.

2. ZIP File Concatenation
By appending multiple ZIP archives into a single file, attackers exploit inconsistencies in how different tools handle these files. This allows them to embed malware that evades detection by certain archive managers.

Broader Implications of Fileless Malware

Fileless malware like Remcos RAT poses significant challenges:

• Detection Difficulties: Traditional signature-based antivirus systems struggle to detect fileless malware, as there are no static files to scan.
• Forensic Limitations: The lack of disk artifacts complicates post-incident analysis, making it harder to trace the attack's origin and scope.
• Increased Sophistication: These campaigns demonstrate the growing technical prowess of cybercriminals, leveraging legitimate tools and services for malicious purposes.

Mitigation Strategies

1. Patch Management some text
   • It is important to regularly update software to address known vulnerabilities like CVE-2017-0199. Microsoft released a patch for this vulnerability in April 2017.
2. Advanced Email Security some text
   • It is important to implement email filtering solutions that can detect phishing attempts, even those using legitimate services like DocuSign.
3. Endpoint Detection and Response (EDR)some text
   • Always use EDR solutions to monitor for suspicious behavior, such as unauthorized use of mshta.exe or process hollowing.
4. User Awareness and Training some text
   • Educate users about phishing techniques and the risks of opening unexpected attachments.
5. Behavioral Analysis some text
   • Deploy security solutions capable of detecting anomalous activity, even if no malicious files are present.

Conclusion

The attack via CVE-2017-0199 further led to the injection of a new fileless variant of Remcos RAT, proving how threats are getting more and more sophisticated. Thanks to the improved obfuscation and the lack of files, the attackers eliminate all traditional antiviral protection and gain full control over the infected computers. It is real and organisations have to make sure that they apply patches on time, that they build better technologies for detection and that the users themselves are more wary of the threats.

References

• Fortinet FortiGuard Labs: Analysis by Xiaopeng Zhang
• Perception Point: Research on ZIP File Concatenation
• Wallarm: DocuSign Phishing Analysis
• Microsoft Security Advisory: CVE-2017-0199

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Executive Summary

A video showing thick smoke rising from a building and people running in panic is being shared on social media. The video is being circulated with the claim that it shows Iran launching a missile attack on the United States.CyberPeace’s research found the claim to be misleading. Our probe revealed that the video is not related to any recent incident.  The viral clip is actually from the September 11, 2001 terrorist attacks on the World Trade Center in the United States and is being falsely shared as footage of an alleged Iranian missile strike on the US.

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Claim:

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An Instagram user shared the video claiming, “Iran has attacked a US airbase in Qatar. Iran has fired six ballistic missiles at the Al Udeid Airbase in Qatar. Al Udeid Airbase is the largest US military base in West Asia.”

Links to the post and its archived version are provided below.

• https://www.instagram.com/reels/DTksHFXio11/
• https://archive.ph/9v9Hi 

Fact Check:

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To verify the claim, we extracted key frames from the viral video and ran a reverse image search using Google Lens. During the search, we found visuals matching the viral clip in a report published by Wion on September 11, 2021. The report, titled “In pics | A look back at the scenes from the 9/11 attacks,” included an image that closely resembled the visuals seen in the viral video.  The caption of the image stated that it was a file photo from September 11, 2001, showing pedestrians running as one of the World Trade Center towers collapsed in New York City.

• https://www.wionews.com/photos/in-pics-a-look-back-at-the-scenes-from-the-911-attacks-412282/412287 

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Further research led us to the same footage on the YouTube channel CBS 8 San Diego. At the 01:11 timestamp of the video, visuals matching the viral clip can be clearly seen.

• https://www.youtube.com/watch?v=mCDflbRcKXc 

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We also found an Al Jazeera report dated June 23, 2025, which confirmed that Iran had attacked US forces stationed at the Al Udeid airbase in Qatar in retaliation for US strikes on Iran’s uclear facilities. However, the visuals used in the viral video do not correspond to this incident.

• https://www.aljazeera.com/news/2025/6/23/iran-attacks-us-air-base-in-qatar-what-we-know-so-far 

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Conclusion

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The viral video does not show a recent Iranian attack on a US airbase in Qatar. The clip actually dates back to the September 11, 2001 terrorist attacks on the World Trade Center in the United States. Old 9/11 footage has been falsely shared with a misleading claim linking it to Iran’s alleged missile strike on the US.

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Introduction

The Ministry of Electronics and Information Technology recently released the IT Intermediary Guidelines 2023 Amendment for social media and online gaming. The notification is crucial when the Digital India Bill’s drafting is underway. There is no denying that this bill, part of a series of bills focused on amendments and adding new provisions, will significantly improve the dynamics of Cyberspace in India in terms of reporting, grievance redressal, accountability and protection of digital rights and duties.

What is the Amendment?

The amendment comes as a key feature of cyberspace as the bill introduces fact-checking, a crucial aspect of relating information on various platforms prevailing in cyberspace. Misformation and disinformation were seen rising significantly during the Covid-19 pandemic, and fact-checking was more important than ever. This has been taken into consideration by the policymakers and hence has been incorporated as part of the Intermediary guidelines. The key features of the guidelines are as follows –

• The phrase “online game,” which is now defined as “a game that is offered on the Internet and is accessible by a user through a computer resource or an intermediary,” has been added.
• A clause has been added that emphasises that if an online game poses a risk of harm to the user, intermediaries and complaint-handling systems must advise the user not to host, display, upload, modify, publish, transmit, store, update, or share any data related to that risky online game.
• A proviso to Rule 3(1)(f) has been added, which states that if an online gaming intermediary has provided users access to any legal online real money game, it must promptly notify its users of the change, within 24 hours.
• Sub-rules have been added to Rule 4 that focus on any legal online real money game and require large social media intermediaries to exercise further due diligence. In certain situations, online gaming intermediaries:

• Are required to display a demonstrable and obvious mark of verification of such online game by an online gaming self-regulatory organisation on such permitted online real money game
• Will not offer to finance themselves or allow financing to be provided by a third party.
• Verification of real money online gaming has been added to Rule 4-A.

• The Ministry may name as many self-regulatory organisations for online gaming as it deems necessary for confirming an online real-money game.
• Each online gaming self-regulatory body will prominently publish on its website/mobile application the procedure for filing complaints and the appropriate contact information.
• After reviewing an application, the self-regulatory authority may declare a real money online game to be a legal game if it is satisfied that:

• There is no wagering on the outcome of the game.
• Complies with the regulations governing the legal age at which a person can engage into a contract.
• The Information Technology (Intermediary Guidelines and Digital Media Ethics Code) Rules, 2021 have a new rule 4-B (Applicability of certain obligations after an initial period) that states that the obligations of the rule under rules 3 and 4 will only apply to online games after a three-month period has passed.
• According to Rule 4-C (Obligations in Relation to Online Games Other Than Online Real Money Games), the Central Government may direct the intermediary to make necessary modifications without affecting the main idea if it deems it necessary in the interest of India’s sovereignty and integrity, the security of the State, or friendship with foreign States.
• Intermediaries, such as social media companies or internet service providers, will have to take action against such content identified by this unit or risk losing their “safe harbour” protections under Section 79 of the IT Act, which let intermediaries escape liability for what third parties post on their websites. This is problematic and unacceptable. Additionally, these notified revisions can circumvent the takedown order process described in Section 69A of the IT Act, 2000. They also violated the ruling in Shreya Singhal v. Union of India (2015), which established precise rules for content banning.
• The government cannot decide if any material is “fake” or “false” without a right of appeal or the ability for judicial monitoring since the power to do so could be abused to thwart examination or investigation by media groups. Government takedown orders have been issued for critical remarks or opinions posted on social media sites; most of the platforms have to abide by them, and just a few, like Twitter, have challenged them in court.

Conclusion

The new rules briefly cover the aspects of fact-checking, content takedown by Govt, and the relevance and scope of sections 69A and 79 of the Information Technology Act, 2000. Hence, it is pertinent that the intermediaries maintain compliance with rules to ensure that the regulations are sustainable and efficient for the future. Despite these rules, the responsibility of the netizens cannot be neglected, and hence active civic participation coupled with such efficient regulations will go a long way in safeguarding the Indian cyber ecosystem.