IPV4/IPV6 Obfuscation
Created the Monday 19 August 2024. Updated 2 months, 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
Contributors
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.
- https://www.sentinelone.com/blog/hive-ransomware-deploys-novel-ipfuscation-technique/
- https://www.bleepingcomputer.com/news/security/hive-ransomware-uses-new-ipfuscation-trick-to-hide-payload/
- https://cyware.com/news/ipfuscation-is-hives-new-technique-to-evade-detection-96c3c748
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