Eight941

Threat description

Details

Category: Malware
Type: Virus
Platform: W97M

Summary

W97M/Eight941 is Word 97 class infector. When an infected document is opened or closed, the virus infects the global template. After that, it infects all documents that are closed or opened.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

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Technical Details

Beside replication, W97M/Eight941.A adds a password protection to all documents that are opened in Word when it infects. The password is:

8941

Eight941.B

W97M/Eight941.B replicates only when a document is opened. Otherwise, it is functionally identical with W97M/Eight941.A.

Eight941.C

W97M/Eight941.C replicates only when a document is closed. Otherwise, it is functionally identical with W97M/Eight941.A.

Eight941.D

W97M/Eight941.D is a modified variant. This variant does not add the password protection to every document. Instead, it activates its payload at September 1st and November 10th. At this time, the virus searches "C:" -drive for document files and adds a password to each file that it finds. The password is also different:

xyz

Eight941.E

This variant is modified from W97M/Eight941.D. The part that sets the password has been removed.

Eight941.S

Variant:Eight941.D

W97M/Eight941.D is a modified variant. This variant does not add the password protection to every document. Instead, it activates its payload at September 1st and November 10th. At this time, the virus searches "C:" -drive for document files and adds a password to each file that it finds. The password is also different:

xyz


Variant:Eight941.E

This variant is modified from W97M/Eight941.D. The part that sets the password has been removed.


Variant:Eight941.S

Functionally this variant is identical with Eight941.E


Variant:Eight941.C

W97M/Eight941.C replicates only when a document is closed. Otherwise it is functionally identical with W97M/Eight941.A.


Variant:Eight941.B

W97M/Eight941.B replicates only when a document is opened. Otherwise it is functionally identical with W97M/Eight941.A.


Variant:Eight941.A

When an infected document is opened or closed, the virus infects the global template. After that, it infects all documents that are closed or opened. Beside replication, W97M/Eight941.A adds a password protection to all documents that are opened in Word when it infects. The password is:

8941






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