The virus contains one text string: "DataLock version 1.00". It infects all EXE files, but COM files are only infected if they are larger than 22999 bytes.
In addition to infecting files, the virus carries a non-destructive, but highly annoying payload. When a file is opened with function 3DH, the virus checks if the filename matches "*.?BF", which is in all likelihood intended to match .DBF files (dBASE data files). If the name matches, the virus produces a "Too many files open" error message, making the file inaccessible.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.
You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.
A bigger, "buggy" version.