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-
- HSDIAG.ZIP WARNING!!!
- ~~~~~~~~~~~~~~~~~~~~~
-
- The file HSDIAG.ZIP, masquerading as a high speed modem diagnostic
- utility is a Torjan horse.
-
- This is a PRELIMINARY report and will be expanded and/or modified
- (and probably corrected) in due course.
-
- I received HSDIAG from Bob Feldman today, and have not had sufficient
- time to disassemble HSDIAG.EXE completely, but I have done enough to
- determine that the program will overwrite the first 255 sectors on the
- first eight drives on a system!
-
- The Trojan begins with the highest number drive and works downward,
- finishing with the floppy diskette in Drive A, if such exists. In
- addition to data loss, the system will no longer be bootable from
- the hard drive.
-
- Error messages are suppressed and once started, the Trojan can NOT
- be halted by a Ctrl-C or Ctrl-Break key sequence.
-
- No virus scanner in my arsenal twigs to the Trojan, nor does
- F-PROT 2.07 in heuristic mode find anything suspicious. This is
- not at all surprising, and one shouldn't expect any virus scanner
- to provide protection against Trojan programs.
-
- However, tired old PROGNOSE warns of possible danger.
-
- The following strings can be found in HSDIAG.EXE:
-
- 18C: High Speed Modem Diagnostics
- 1B6: Version 1.0
- 1E0: Sound Blaster Support
- 232: ) Written by Bully Bros, Incoporated)
- Please Press [ENTER] To Load Diagnostics,
- 287: Please wait ..
- 296: ..Loading Done!#Press [ENTER] to Start Diagnostics.
- 2CA: Bully Bros.Dallas TX.
- 2E0: -Copyrite (C) 1993 Bully Bros. Raj And Asshole
- DF0: #$456789:;<=>?uRuntime error
- E0E: at
-
-
- The Trojan archive contents are:
-
- Archive: HSDIAG.ZIP
-
- Name Length Method SF Size now Mod Date Time CRC
- ============ ======== ======== ==== ======== ========= ======== ========
- HSDIAG.EXE 4864 Deflated 34 3172 08 Mar 93 22:03:58 1C84FC4D
- FILE_ID.DIZ 245 Deflated 7 228 17 Mar 93 02:02:50 7CF5CBD2
- HSDIAG1.DAT 17264 Deflated 36 11044 27 Nov 92 13:47:34 46B34F7D
- HSDIAG2.DAT 7121 Deflated 57 3012 27 Nov 92 13:47:34 7127D2C7
- HELP.DAT 4064 Deflated 31 2802 27 Nov 92 13:47:34 6FD0DD60
- UART1.DAT 5872 Deflated 39 3542 27 Nov 92 13:47:34 AFB5E3CE
- HSDIAG3.DAT 2848 Deflated 50 1404 27 Nov 92 13:47:34 0089171B
- ============ ======== ======== ==== ======== ========= ======== ========
- *total 7 42278 ZIP 2.0 38% 26706 10 Apr 93 11:23:42
-
- All executables in the archive appear to have been written with
- Borland's Turbo Pascal, version 4.0 or higher. Since I am not a
- Pascal programmer, I can't really be certain on this point.
-
- I am absolutely certain that all of the .DAT files were taken from
- Joseph Sheppard's ATSEND v.1.8 and have merely been renamed. The
- contents of ATSEND18.ZIP are listed below, and I have done a
- byte-by-byte comparison of the .DAT files from the hack with the
- files in ATSEND18.ZIP to verify this.
-
- Archive: ATSEND18.ZIP
-
- Name Length Method SF Size now Mod Date Time CRC
- ============ ======== ======== ==== ======== ========= ======== ========
- ATSEND.EXE 17264 Imploded 33 11452 27 Nov 92 13:47:34 46B34F7D
- ATSEND.DOC 7121 Imploded 55 3142 27 Nov 92 13:47:34 7127D2C7
- HEX2DEC.EXE 4064 Imploded 28 2899 27 Nov 92 13:47:34 6FD0DD60
- ATBATCH.EXE 5872 Imploded 37 3688 27 Nov 92 13:47:34 AFB5E3CE
- FILE_ID.DIZ 332 Imploded 9 302 27 Nov 92 13:49:38 09F0E0D8
- ATSEND.NEW 2848 Imploded 44 1589 27 Nov 92 13:47:34 0089171B
- ============ ======== ======== ==== ======== ========= ======== ========
- *total 6 37501 ZIP 1.10 36% 23708 27 Nov 92 13:49:38
-
-
- I received HSDIAG in ZIP 2.0 format and have no idea whether the
- author of the Trojan released it initially in an archive created
- with PKZip 1.10 with a forged -AV or not. Mr. Sheppard uses the
- AV feature of PKZip to provide some slight measure of security:
-
- PKUNZIP (R) FAST! Extract Utility Version 1.1 03-15-90
- Copr. 1989-1990 PKWARE Inc. All Rights Reserved. PKUNZIP/h for help
- PKUNZIP Reg. U.S. Pat. and Tm. Off.
-
- Searching ZIP: ATSEND18.ZIP
- Testing: ATSEND.EXE OK -AV
- Testing: ATSEND.DOC OK -AV
- Testing: HEX2DEC.EXE OK -AV
- Testing: ATBATCH.EXE OK -AV
- Testing: FILE_ID.DIZ OK -AV
- Testing: ATSEND.NEW OK -AV
-
- Authentic files Verified! # CRI220 Joseph Sheppard
-
- The hacked archive, HSDIAG.ZIP contains a FILE_ID.DIZ file:
-
- ░▒▓ High Speed Modem Diagnostics ▓▒░
- Superb tool for testing and configuring high
- speed (9600bps and up) modems. Reports on
- UART, FIFO, S-Registers, and full NVRAM
- editor with context sensitve help. $35
- Written by: Norman Shelbert <ASP>
-
- This is NOT the FILE_ID.DIZ from Sheppard's ATSEND18.
- Don't know who Norman Shelbert may be, but possibly there
- is a legitimate high speed modem diagnostic program
- written by such a person, and the FILE_ID.DIZ may have
- been lifted from that program.
-
- If at all possible, I will post further information
- within the next day or two.
-
-
- R. Wallace Hale, sysop
- Driftnet (506) 325-9002
-
- 10 April 1993
-