| Alias: | |
| Strain: | - |
| detected when: | |
| where: | |
| Classification: | COM and EXE infector |
| Length: | 1440D |
Preconditions | |
| Operating System(s): | MS-DOS |
| Version/Release: | None |
| Computer model(s): | PC's |
| Caroname: | Maze |
Attributes | |
| Easy identification: | |
Type of Infection: | The virus appends itself to the files Selfrec in memory: INT_21; AX=DEFE -> AX=ABCD Selfrec on disk: File[3] =C356 (COM);File[12] =File[14]+File[16]+0156 (EXE); |
| Infection Technique: | |
| Infection Trigger: | (INT_21; AX=4B00 or INT_21; AH=3D) |
| Storage Media affected: | |
| Interrupts hooked: | 21/3D, 21/4B00, 21/DEFE, 21/DEFF |
| Stealth: | |
| Tunneling/Selfprot: | |
| Oligo/Polymorphism: | |
| Encoding Method: | |
| Damage: | Transient: None Permanent: Overwrites data/text files with the text'MAZE Written by K.stanbs' and randomamount of garbage.See MSG_NOT_DISPLAYED |
| Damage Trigger: | Transient: None Permanent: (INT_21;AH=3D) and not (.COM or .EXE)and (infections_since_installation > 0A) |
| Particularities: | Memory allocation errors, system hangs Displayed text: None Not displayed text: "COMEXEMAZE Written by K.stanbs" INT_21;AX=DEFF -> Infect fileDS:DX = ASCIIZ filename of file to infectThe virus tries to infect COMMAND.COM with thiscall during installation, but succeeds onlywhen COMSPEC is the first environment variable. |
| Similarities: | None |
Agents | |
| Countermeasures: | |
| Standard means: | |
Acknowledgements | |
| Location: | Virus Test Center, University Hamburg, FRG |
| Classification by: | Snorre Fagerland |
| Documentation by: | Snorre Fagerland |
| Date: | 1993-11-02 |
| Information Source: | Caroentry (autom.converter by S.Freitag) |
(c) 1996 Virus-Test-Center, University of Hamburg