home *** CD-ROM | disk | FTP | other *** search
-
- *********************************************
- *** Reports collected and collated by ***
- *** PC-Virus Index ***
- *** with full acknowledgements ***
- *** to the authors ***
- *********************************************
-
-
- SYLVIA VIRUS
- ============
-
- Sylvia contains a message, not displayed:
-
- "This program is infected by a HARMLESS Text-Virus V2.1
-
- Send a FUNNY postcard to : Sylvia Verkade,
- Duinzoom 36b,
- 3235 CD Rockanje
- The Netherlands.
-
- You might get an ANTIVIRUS program....."
-
- The message is checksummed and, if altered, a rude message is then
- displayed to the effect:
-
- "F*** you, Lamer"
-
- ************* MORE ***************
-
- ======= Computer Virus Catalog 1.2: "Sylvia 2.1" (5-June-1990) ======
-
- Entry...............: Sylvia V2.1
- Alias(es)...........: Holland Girl Virus
- Virus Strain........: Sylvia
- Classification......: File Virus (Not RAM-resident), infects COM-files
- Length of Virus.....: 1332 bytes
-
- -------------------- Preconditions -----------------------------------
- Operating System(s).: PCDOS/MSDOS
- Version/Release.....: 2.xx upward
- Computer model(s)...: IBM-PC, XT, AT and compatibles
-
- -------------------- Attributes --------------------------------------
-
- Easy Identification.: Typical texts in Virus body (readable with
- Hexdump-facilities) :
- 1. "39 38 39 38 4F 45 4F 52 61 59
- 1E 56 5D 5A 52 61 62" (encoded text)
- 2. 'Text-Virus V2.1'
- 3. 'Sylvia Verkade'
-
- Type of infection...: The virus infects only COM-files with less
- than 30 KB; it does not infect COMMAND.COM,
- IBMBIO.COM, IBMDOS.COM.
- 1301 bytes of the virus-code are written
- in front of and 31 bytes are written behind
- the original code; files are only infected once,
- because the virus checks the existence of its
- signature (808h) at the beginning of the file.
-
- Infection Trigger...: When an infected file is started, the virus
- tries to infect 5 COM-files on default drive.
-
- Interrupts hooked...: INT24h
-
- Damage..............: The virus displays the following message :
- "FUCK YOU LAMER !!!! (CRLF) system halted..."
- and stops system by jumping into an endless
- loop. The message is encoded in the program.
- In this version (V2.1), the message typical for
- original Sylvia virus ("This program is infected
- by a HARMLESS ... ") is NOT displayed.
-
- Damage Trigger......: After being activated, the virus checks itself
- by creating a check-sum of the first 144 words.
- When the check-sum is incorrect (# 46A3h) the
- damaging part of the virus is activated.
-
- -------------------- Agents ------------------------------------------
-
- Countermeasures.....: The virus will be detected by :
- VIRSUCH 2.15 (D. Hoppenrath)
- F-FCHK 1.08 (F. Skulason)
- SCAN 2.3 & 3.1 (McAfee)
-
- Countermeasures successful: F-FCHK 1.08 successful disinfects
- programs
-
- ------------------- Acknowledgement ---------------------------------
-
- Location............: Virus Test Center, University Hamburg, FRG
- Classification by...: Jrg Steindecker
- Documentation by....: Jrg Steindecker
- Date................: 5-June-1990
-
-
- ==================== End of Sylvia V2.1 Virus ========================
-
-
- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- ++++++++++++++++++++++++++ end of reports ++++++++++++++++++++++++
- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++