The provided information points to a potential Remote Code Execution (RCE) vulnerability targeting Microsoft Office documents. The repository, referenced by Caztemaz, appears to be related to creating malicious Office documents (DOC, DOCX, XML) that exploit vulnerabilities, leveraging a 'silent exploit builder'. The updates primarily involve modifications to a log file, likely tracking the build process or timestamping. Given the nature of the attack, this could lead to severe compromise, including system control and data theft. The description suggests targeting platforms like Office 365. However, lacking detailed information on the specific CVE, impact analysis focuses on the concept rather than specific exploitable vulnerabilities.
Analysis of the updates indicates constant revision to the log file, likely reflecting continuous development or testing iterations of the exploit builder.
| 2 | Target: Microsoft Office documents (DOC, DOCX, XML) are exploited. |
| 3 | Impact: RCE can lead to full system compromise. |
| 4 | Delivery: Malware payloads are embedded in documents to trigger exploits. |
| 5 | Platforms: Impacts Office 365 and potentially other versions. |
#### 🛠️ 技术细节
> Vulnerability: The core issue is exploiting vulnerabilities within the parsing of Office document formats to achieve RCE.
> Exploitation: Documents are crafted to trigger specific vulnerabilities when opened. This likely involves techniques like malicious macros, embedded objects, or format-specific exploits.
> Malware Payload: The exploit builder likely integrates and delivers malware payloads, such as backdoors, to establish persistence and control.
> Attack Vector: Likely delivered through phishing or social engineering, where users are tricked into opening malicious documents.
#### 🎯 受影响组件
```
• Microsoft Office (potentially including versions used by Office 365)
• DOC, DOCX, XML file format parsing
```
#### ⚡ 价值评估
<details>
<summary>展开查看详细评估</summary>
The described approach to RCE via crafted Office documents poses a significant threat. Office is widely used, the exploitation potential is very high. The presence of an exploit builder suggests ease of use, and the potential for remote code execution and system compromise makes it a critical concern. This assessment assumes successful exploitation leads to full system compromise.
The provided GitHub repository, likely associated with CVE-2025-48384, suggests a Remote Code Execution (RCE) vulnerability exploitable through a `post-checkout` Git hook. The repository currently has minimal activity, with only two commits. The initial commit establishes a baseline, while the subsequent commit modifies the `post-checkout` hook to execute arbitrary commands (touch a file in `/tmp`). The vulnerability leverages the execution of attacker-controlled code during a `git checkout` operation, which occurs frequently in development workflows. This presents a significant risk as it can lead to remote code execution if an attacker can control the contents of the repository.
#### 🔍 关键发现
| 序号 | 发现内容 |
|------|----------|
| 1 | Exploitation occurs via a `post-checkout` Git hook. |
| 2 | The hook executes arbitrary commands on the target system. |
| 3 | Requires the attacker to control a Git repository. |
| 4 | Impact: RCE, potential system compromise. |
| 5 | Vulnerability is triggered during `git checkout` operations. |
#### 🛠️ 技术细节
> The vulnerability lies in the execution of the `post-checkout` hook. If a user clones or checks out a repository containing a malicious `post-checkout` script, the script will be executed on the user's system.
> The provided POC demonstrates the ability to execute arbitrary commands by modifying the `post-checkout` script.
> Successful exploitation allows an attacker to execute commands with the privileges of the user running the `git checkout` command.
> The vulnerability is triggered by the `git checkout` command.
#### 🎯 受影响组件
```
• Git clients that clone or checkout repositories with a malicious `post-checkout` hook.
```
#### ⚡ 价值评估
<details>
<summary>展开查看详细评估</summary>
The vulnerability allows for Remote Code Execution. The exploitation is relatively simple and relies on a common development workflow (git checkout). The vulnerability is easily weaponized, has a high impact on affected systems, and there is a lack of public patches.
The provided information describes a registry exploit potentially utilizing FUD (Fully UnDetectable) techniques. The linked GitHub repository 'Phantom-Registy-Exploit-Cve2025-20682-Runtime-Fud-Lnk' suggests the existence of an exploit related to CVE-2025-20682. The recent updates mainly involve log file modifications, indicating ongoing development and testing. Given the presence of 'FUD' in the description, the exploit aims to bypass detection, increasing its potential impact. The updates indicate active development with the potential for new features and bug fixes. The focus on registry exploits hints at possible privilege escalation or persistent access via registry modifications. The lack of detailed information on specific exploitation methods prevents a detailed analysis of the specific CVE. Additional information would be required to assess the exact vulnerability.
| 2 | Employs FUD techniques to evade detection. |
| 3 | Potential for privilege escalation or persistent access. |
| 4 | Active development, indicated by recent commits |
#### 🛠️ 技术细节
> Exploits vulnerabilities within the Windows registry.
> Utilizes techniques to bypass security products.
> Possible execution through LNK or other persistence mechanisms.
> The provided description lacks specific details about the vulnerability targeted or the exploitation methods.
#### 🎯 受影响组件
```
• Windows Registry (specific versions/configurations TBD)
• Potentially any software or component reliant on the registry
```
#### ⚡ 价值评估
<details>
<summary>展开查看详细评估</summary>
The exploit leverages registry vulnerabilities and FUD techniques. The combination of these factors creates a high risk of successful exploitation and persistence, with the potential for complete system compromise. The active development and 0day nature increases the urgency to address this vulnerability. Further assessment is required to determine the exact nature of the vulnerability.
