B1txor20
- First seen
- 2022-02-01 00:00:00
- Malware type
- backdoor
- Family
- Malware family
- Profile updated
- 2026-07-07 14:21:53
Context
B1txor20 is a malware that was discovered by 360 Netlab along others exploiting Log4J. the name is derived from using the file name "b1t", the XOR encrpytion algorithm, and the RC4 algorithm key length of 20 bytes. According to 360 Netlab this Backdoor for Linux platform uses DNS Tunnel to build a C2 communication channel. They also had the assumption that the malware is still in development, because of some bugs and not fully implemented features.
Reports & references
- malpedia.caad.fkie.fraunhofer.de — Elf.B1Txor20 (report)
- blog.netlab.360.com — B1Txor20 Use Of Dns Tunneling Cn (report)