This is a generic detection for an X97M macro virus, an older malware type that spreads via Microsoft Excel documents. The virus infects other workbooks by copying its own VBA macro code into them and achieves persistence by saving an infected file to the Excel startup folder.
Relevant strings associated with this threat: - If w2.Lines(1, 1) <> "'OOO" Then (MACROHSTR_EXT) - If UCase(Dir(Application.StartupPath + "\book1.")) <> "BOOK1" Then (MACROHSTR_EXT) - xlCM.InsertLines 1, w1.Lines(1, w1.CountOfLines) (MACROHSTR_EXT) - xlWB.SaveAs (MACROHSTR_EXT) - ame:=Application.StartupPath + "\Book1.", FileFormat:=xlNormal, AddToMru:=False (MACROHSTR_EXT) - mFileName = "C:\TMP\" + oldname (MACROHSTR_EXT)
521ccb769a6053c2e2beb9c9deadf70f525b1be8ef30afe5e6d9cb2fca7fb7bbQuarantine and remove the detected file. Check the Excel startup directory for suspicious files (e.g., 'Book1.') and delete them. Ensure Office Macro Security settings are configured to disable macros from untrusted sources.