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Disaster stories
December 13th Virus Attack. (W97M/Thus.A)
Virus and Symptoms
There has been a virus attack from a virus called W97M/Thus.A on the 13th December So Far we are in receipt of more than 500 distress calls from end users for data recovery .We have analysed and recovered data from crashed hard disk in hundreds. More and more hard disks and calls are coming in for data recovery.
Symptoms: Users infected with the Thursday virus will see no obvious indications that a document has been infected. However, because the virus infects Word 97's normal.dot, the size of that file will increase from its normal 27K. In addition, the virus turns off Word 97's Macro Warning feature. If a "clean" document known to contain macros does not produce the regular warning, this may be an indication that the system is infected.
Pathology: W97M/Thus.A is a Word 97 Macro virus which infects the normal.dot template within Microsoft Word 97. The virus consists of a module called "This Document," which turns the Word 97 Macro Warning feature off, then infects any Word documents opened or created on that machine from that point forward. The virus is primarily designed to spread, except on the "trigger date" of December 13th, at which point opening any infected document can cause the deletion of all files on drive c: (including sub directories). This virus has been reported to AVERT researchers by several banks and financial organizations in Europe and the United States.
Win-CIH Virus Causes Major Data Loss
On April 26, 1999, the Win-CIH Virus (also known as Chernobyl after the Russian nuclear accident) hit the world. A lot of disk crashes were reported all over the world due to the virus. Approximately 100,000 PC's containing sensitive and mission critical data were affected in India. The affected sectors were MNC's, Banks, Financial Institutions, Defence, Exporters, Stock Brokers, Manufacturing Houses, Consultancy Firms and Software Companies. Estimated tangible value of the affected data loss was Rs. 2500 lakhs.
This loss could be as high as 20 lakhs to some corporations for a period of 3 days. Apart from data loss there had been major time and operational losses due to inaccessible information. The Win-CIH virus infects only Windows 95 and Windows 98 systems. It triggers on the 26th of every month and overwrites or deletes all information on the hard drive in systems it infects. It also has the ability to overwrite Flash BIOS (basic instruction set of computers) chipsets on 486, Pentium and Pentium II systems provided they are write enabled. As soon as the virus was detected, all the major Anti-Virus Companies released updates for their packages that could prevent your system from this virus.
These updates are available on the web sites of the Companies as well as in the market. We at Stellar were rocked by telephone calls on and after April 26th. We offered 24 hours help line to address the clients suffering from this problem. We recovered data from 3500 machines with success rate touching 100% in most of the cases. We received hard disks for data recovery not only from India, but also from the neighboring countries.
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Nothing can stop your hard drive from crashing when its time is due. Fortunately the data recovery engineers at DATA RECOVERY SERVICES Data Recovery- New York are true subsystem experts in this field and they can recover data from disks and tape that have suffered:
- Natural Disasters: fire, heat, smoke, flooding by broken pipes, sprinklers, rain, etc.
- Software Corruption: accidental erasure or reformat, virus infection, power surge, etc.
- Hardware Failure: damaged motors, actuators, bad controllers, head failure, etc.
- Deliberate Acts: computer crime, vandalism, sabotage, etc.
- Tape & Cartridge Failure:broken or worn out tape, misalligned read heads, corrupt catalogs, overwritten failed backups.
- Laptop & Notebook Specialists: dropped, smashed, crushed or otherwise abused.
- Deleted Files.
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