The name itself provides critical clues. "Patcher" indicates a program designed to modify existing software by applying a "patch" (a piece of code that alters behavior). "CF2" likely refers to a specific version, software code, or group identifier—commonly associated with "Clean Files 2" or a variant of a cracking utility.
rule patcher_cf2 strings: $s1 = "cf2_patch_main" wide $s2 = "patch_amsi_bypass" ascii condition: any of them patcher-cf2.exe