IPV4/IPV6 Obfuscation

Created the Monday 19 August 2024. Updated 4 weeks ago.

The obfuscated payload masquerades itself as an array of ASCII IPv4 addresses. Each one of these IPs is passed to the RtlIpv4StringToAddressA function, which will translate the ASCII IP string to binary. The binary representation of all of these IPs is combined to form a blob of shellcode. Additionally, IPfuscation variants were spotted using IPv6 instead of IPv4 addresses, UUIDs, and MAC addresses, all operating in almost the same way.

Technique Identifier

U0710

Featured Windows API's

Below, you will find a list of the most commonly used Windows API's that are currently utilized by malware authors for current evasion technique. This list is meant to provide an overview of the API's that are commonly used for this purpose. If there are any API's that you feel should be included on this list, please do not hesitate to contact us. We will be happy to update the list and provide any additional information or documentation that may be helpful.

Contributors

4rkt0uR0s

Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.