Good morning According to this source it came from a German university: https://en.wikipedia.org/wiki/Christmas_Tree_EXEC
reading the code the variables are in GERMAN. e.g. WER = who or a modification of german words (e.g. for year, month, day). So a german origin is highy probable. Best regards Mike -----Ursprüngliche Nachricht----- Von: IBM Mainframe Discussion List <[email protected]> Im Auftrag von René Jansen Gesendet: Dienstag, 16. September 2025 18:19 An: [email protected] Betreff: Re: Looking for CHRISTMA EXEC Hi Mike, So the author was German-speaking? Best regards, René. > On 16 Sep 2025, at 17:43, Mike Beer <[email protected]> wrote: > > You can find the source code here: > https://archive.ph/20130903155523/http://vxheaven.org/dl/exp/CHRISTMAS > > > -----Ursprüngliche Nachricht----- > Von: IBM Mainframe Discussion List <[email protected]> Im > Auftrag von Bill Bellach > Gesendet: Dienstag, 16. September 2025 17:27 > An: [email protected] > Betreff: Looking for CHRISTMA EXEC > > All, > > I am looking for anyone from 1987 that may have had information regarding the > CHRISTMA EXEC virus. In particular I am looking for anyone who knows/knew > Jerry Hoekstra, at that time I believe he was with Calvin University. > > > Thanks > Bill > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
