| Alias: | Dudley |
| Strain: | - |
| detected when: | |
| where: | |
| Classification: | COM and EXE infector |
| Length: | 4608 |
Preconditions | |
| Operating System(s): | MS-DOS |
| Version/Release: | None |
| Computer model(s): | PC's |
| Caroname: | Dudley |
Attributes | |
| Easy identification: | |
Type of Infection: | The virus appends itself to the files Selfrec in memory: INT21h;AX=5454h -> AX=0000 Selfrec on disk: EXE_Checksum==5045h; COM_start==7100h |
| Infection Technique: | |
| Infection Trigger: | INT 21h && (AX == 4B00h ||(AH == 3Dh || AH == 56h || AH == 6Ch) &&(ext == COM || ext == EXE)) |
| Storage Media affected: | |
| Interrupts hooked: | 21h/4B00h 21h/3Dh 21h/56h 21h/6Ch 21h/5454h |
| Stealth: | |
| Tunneling/Selfprot: | |
| Oligo/Polymorphism: | |
| Encoding Method: | |
| Damage: | Transient: None Permanent: None |
| Damage Trigger: | Transient: None Permanent: None |
| Particularities: | None Displayed text: None Not displayed text: "<[Oi Dudley!][PuKE]>" Polymorphic COM and EXE infector. Contains code thatattempts to avoid infecting a file with name ????SC??.???,but it has a bug. |
| Similarities: | None |
Agents | |
| Countermeasures: | |
| Standard means: | |
Acknowledgements | |
| Location: | Virus Test Center, University Hamburg, FRG |
| Classification by: | David M. Chess |
| Documentation by: | David M. CHess |
| Date: | 1993-03-10 |
| Information Source: | Caroentry (autom.converter by S.Freitag) |
(c) 1996 Virus-Test-Center, University of Hamburg