This is Trend Micro’s detection for the infected files of PE_VBAC.A-O. They drop the .DLL file VCAB.DLL, detected as the mother file infector PE_VBAC.A-O, onto the Windows temporary folder of target systems. The said action initiates the said mother file’s infection routine. Note that files detected as PE_VBAC.A can also arrive via network shares.
They also inject the said .DLL file into running processes to help it stay memory-resident and to enable its execution whenever a target process(es) executes.