Adversaries may communicate using application layer protocols associated with transferring files to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server. Protocols such as SMB1, FTP2, FTPS, and TFTP that transfer files may be very common in environments. Packets produced from these protocols may have many fields and headers in which data can be concealed. Data could also be concealed within the transferred files. An adversary may abuse these protocols to communicate with systems under their control within a victim network while also mimicking normal, expected traffic.
- US-CERT TA18-074A
- ESET Machete July 2019
使用该技术的组织
| 组织 | 名称 | 国家 |
|---|---|---|
| grp_g0083 | SilverTerrier | — |
| grp_g1054 | MirrorFace | — |
| grp_g1045 | Salt Typhoon | — |
| grp_g0035 | Dragonfly | Russia |
| grp_g0094 | Kimsuky | DPRK |
| grp_g0096 | APT41 | China |
断言
尚无指向该技术的公开断言。
记录自动入库·未人工复核；置信度与有效期按引用读取。