Yǒurén huáiyí, zhè chǎng wǎngluò gōngjī de mùhòu hēishǒu shì yí ge fànzuì jítuán.
Some suspect that a criminal gang is the hidden hand behind this cyberattack.
Tips
usage
Always sinister: the person secretly directing a crime, a scandal or a smear campaign. For a neutral "behind the scenes" use 幕后 alone, as in 幕后英雄 "unsung hero".
