Xworm 3.1 «2026 Update»

This approach has two advantages for the attacker. First, it ensures that each compiled sample is slightly different, making signature-based detection less effective. Second, it allows for the development of automated config extraction tools. These tools operate by hunting for the mutex string in the binary, then replicating the malware's decryption process to pull out the C2 server address, port, and other critical settings.

objects and the presence of malicious scripts (VBScript or PowerShell) used for process hollowing. technical analysis report for this malware? Malicious PDF delivering Xworm 3.1 payload - SonicWall

: It can harvest browser data (passwords, cookies, credit card info), session tokens from apps like Discord or Telegram, and cryptocurrency wallet details. Surveillance

If you are investigating a specific incident, I can provide more targeted assistance. Let me know: Have you found a you want to analyze? xworm 3.1

XWorm 3.1 is rarely delivered as a raw executable. Threat actors typically bundle it inside multi-stage infection chains, including:

When we analyze a raw XWorm 3.1 sample (SHA-256 often starts with 0x9A4B1C... ), the following layers are present:

Before performing its primary tasks, XWorm gathers detailed information about the host to ensure it is a viable target and to inform the attacker's next steps. This approach has two advantages for the attacker

Xworm, by design, is a dual‑use tool. The developers have adopted a :

Similar to other variants, XWorm 3.1 has been delivered through malicious PDF attachments that exploit vulnerabilities or trick users into downloading the payload.

: It communicates with a remote server using specific user agents for Windows and macOS, sharing detailed system information to receive further commands. Infection Flow These tools operate by hunting for the mutex

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Malicious PDF delivering Xworm 3.1 payload - SonicWall

Reports are generated in , PDF , and STIX‑2.1 bundles. They include:

Once a system is compromised, XWorm ensures it will survive a reboot. It achieves persistence by: