| Alias: | |
| Strain: | --- |
| detected when: | --- |
| where: | --- |
| Classification: | Resident, appending COM-file infector. |
| Length: | 475 bytes on disk/memory |
Preconditions | |
| Operating System(s): | MS-DOS |
| Version/Release: | 2.xx and above |
| Computer model(s): | IBM PC, XT, AT and compatibles |
| Caroname: | Adolf |
Attributes | |
| Easy identification: | The code contains the text: " Adolf Hitler ", and the fourth byte will be an ASCII '5' = 35h. |
Type of Infection: | Starting an infected file will make the virus resident before executing the file correctly. At execion time of an uninfected file, the virus appends itself to the file's code. |
| Infection Technique: | |
| Infection Trigger: | INT 21h load/execute function if the virus is active in memory. |
| Storage Media affected: | |
| Interrupts hooked: | INT 21h functions 4Bh(load/execute) and 41h(delete), INT 24h. |
| Stealth: | |
| Tunneling/Selfprot: | |
| Oligo/Polymorphism: | |
| Encoding Method: | |
| Damage: | Nothing except infection. |
| Damage Trigger: | --- |
| Particularities: | If the virus is active in memory and INT 21h function 41h is called, a deletion will only succeed if bits 0 and 1 of BIOS-parameter 046C (Timer) are not set both. |
| Similarities: | --- |
Agents | |
| Countermeasures: | Skulasons F-PROT 2.06a, McAfee SCAN V99. |
| Standard means: | Reboot and delete infected files. |
Acknowledgements | |
| Location: | Virus Test Center, University of Hamburg, Germany. |
| Classification by: | Stefan Haack |
| Documentation by: | Stefan Haack |
| Date: | 01-FEB-1993 |
| Information Source: | Virus-code analysis |
(c) 1996 Virus-Test-Center, University of Hamburg