������� � � ��������� � �������� � � � � � ��� �� � � � � � � �� ����������� � � � � � � � � � � � � � � � � � � ������ ��������� � ��� ��� ���� ������� ���� �������� � � � ������� � ��� � � � � � � �� � �� � � � � � � � ���� � � �� � � � � ����� � � �������� � �� �������� �� � � � � � � � � � ������� � � �������� � � �� ������� Distributed By Amateur Virus Creation & Research Group (AVCR) ����������������������������������������������������������������������������� ����������������������������������������������������������������������������� Name Of Virus: TWISTER VIRUS ----------------------------------------------------------------------------- Alias: Twistone ----------------------------------------------------------------------------- Type Of Code: Unknown ----------------------------------------------------------------------------- VSUM Information - (NONE) ----------------------------------------------------------------------------- Antivirus Detection: (1) ThunderByte Anti Virus (TBAV) reported twister.com as "Possible Virus" (2) Frisk Software's F-Protect (F-PROT) reported twister.com as "Seems to be infected with unknown" (3) McAfee Softwares Anti Virus (SCAN.EXE) reported twister.com as clean. (4) MicroSoft Anti Virus (MSAV.EXE) reported twister.com as clean. ----------------------------------------------------------------------------- Execution Results: It nails 1 Com file every time it's executed, (or the infected file is executed), It loads into the systems Master Boot Record (In Sector 195 as near as I can tell). It hooks Int. 2 (NMI) - 8 (Timer) - 9 (Keyboard) - 0E (Diskette) - 22 (Dos Terminate) - 23 (Dos Ctrl-C) - 24 (Fatal Error Handler) - 2E (File Execute) - 2F (Program Multiplex) I Can't find a specific address it's loading at yet.. I'm still working ----------------------------------------------------------------------------- Cleaning Recommendations:Delete Infected or TBAV (using Anti-Vir.dat..) ----------------------------------------------------------------------------- Researcher's Notes: Here's the Scan string to add to your AV software for Twister... 8B F6 90 90 B8 01 FA BA 45 59 CD 16 E8 00 ----------------------------------------------------------------------------- Disassembly of the 'Twister' Orig. Virus, (Raw format) ----------------------------------------------------------------------------- 000000: 8B F6 90 90 B8 01 FA BA 45 59 CD 16 E8 00 00 5D ........EY..... 000010: 81 ED 0F 01 8D 9E 22 02 FF 37 43 43 FF 37 B4 1A ......"..7CC.7. 000020: 8D 96 26 02 CD 21 CC B4 4E 8D 96 1A 02 CD 21 72 ..&..!..N.....! 000030: 03 EB 04 90 E9 C3 00 B4 2F CD 21 33 C0 8D 77 1E ......../.!3..w 000040: AC 0A C0 75 FB 83 EE 04 AC 3C 43 74 03 E9 A5 00 ...u......!.O./...... 000100: 21 BB 02 01 8F 07 4B 4B 8F 07 53 33 C0 33 DB 33 !.....KK..S3.3. 000110: C9 33 D2 33 ED 33 F6 33 FF C3 2A 2E 2A 00 E9 00 .3.3.3.3..*.*.. 000120: 00 90 CD 20 00 00 00 00 00 00 00 00 54 68 61 6E ... ........Tha 000130: 6B 73 20 74 6F 20 56 69 70 65 72 2C 20 4D 65 6D ks to Viper, Me 000140: 6F 72 79 20 4C 61 70 73 65 00 00 00 00 00 00 00 ory Lapse...... It uses through E9 (on line 000110) when it infects. L8r, dudez... -The W��$�l