Funny worm spreads in a similar way as LoveLetter. All three known variants of this worm drop, run and delete a binary file Startx.exe that is a password stealing trojan detected by F-Secure Anti-Virus as 'Trojan.PSW.Hooker.24.e'. This trojan is run if the virus found a UBS banking software installed on the victim's machine. Otherwise it replicates as a worm.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
This variant sends e-mail to all recipients in Outlook address book with:
Subject: Funny story Attachment: FUNNY_STORY.HTM.vbs
In addition, it tries to connect to a web location.
This variant is similar with Funny.A, but it sends messages with the following:
Subject: When did you die? Attachment: LIFE_ASSURANCE.HTM.vbs
Funny.C spreads in messages with:
Subject: Rechnungsabschrift Attachment: RECHNUNGSABSCHRIFT.DOC.vbs
This variant does not try to connect to the web. It creates a text file RECHNUNGSABSCHRIFT.DOC and open it with Write.exe. The text file contains the following information:
INVOICE Date: September 18, 2000 From: Katrin Heinze 19, chemin des Aulx CH-1228 Plan-les-Ouates, Geneva Switzerland To:Myron Schmidt" Ch. des Boveresses 151 CH-1066 Epalingess/Lausanne Switzerland Item Description Item Description Cost 1August Voice Mail ChargesCHF 35.00 1Internet - Reserve Domain Name (2 years)CHF 250.00 1Internet - Set Up Fee CHF 110.00 1Internet - Creation Fee CHF 250.00 1Internet - Submit to 540 Search Engines CHF 50.00 1Internet 6 Months of HostingCHF 200.00 TotalCHF 895.00
Technical Details: Katrin Tocheva, F-Secure, September 2000