| Alias: | |
| Strain: | - |
| detected when: | |
| where: | |
| Classification: | EXE-infector, resident |
| Length: | 49 paragraph(s) |
Preconditions | |
| Operating System(s): | MS-DOS |
| Version/Release: | All models |
| Computer model(s): | PC's |
| Caroname: | Close |
Attributes | |
| Easy identification: | |
Type of Infection: | The virus appends itself to the files Selfrec in memory: [0:0] == 0000 Selfrec on disk: File[0Ah] == 000Eh |
| Infection Technique: | |
| Infection Trigger: | Load |
| Storage Media affected: | |
| Interrupts hooked: | 21/4B |
| Stealth: | |
| Tunneling/Selfprot: | |
| Oligo/Polymorphism: | - |
| Encoding Method: | |
| Damage: | Transient: - Permanent: Overwrite C:\IO.SYS or C:\IBMBIO.COM (after clearing thefile attribute) with 65535 bytes of garbage from [0:0], then write"Close .." to the screen and hang. |
| Damage Trigger: | Transient: - Permanent: (with install date)(February <= Month <= May) && (Day_of_Month >= 4) && Load (fifth time) |
| Particularities: | The virus resides above the last MCB [0:0] = 0000 Displayed text: "Close .." |
| Similarities: | |
Agents | |
| Countermeasures: | |
| Standard means: | |
Acknowledgements | |
| Location: | Virus Test Center, University Hamburg, FRG |
| Classification by: | Adam David, Frisk Software International |
| Documentation by: | Adam David, Frisk Software International |
| Date: | 28.7.93 |
| Information Source: | Caroentry (autom.converter by S.Freitag) |
(c) 1996 Virus-Test-Center, University of Hamburg