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Audit implications of computer virus: Additional procedures.

Filmore and Gus, Chartered Accountants, are the auditors of Campbell's Toy Store (CTS),a local retail operation, and you, CA, are in charge of the audit. In January 2005, you completed the inventory count and internal control testing. All procedures ran smoothly and no discrepancies were found. It is now March 22, 2005, and you are at the CTS offices to start the February 28 year-end audit. The controller, Gina Cooper, is explaining an incident that occurred before year end.

"We lost control of our microcomputer system temporarily. At noon on February 14,2005, our computer system shut down. A red heart appeared on all the computer screens, with "Happy Valentine's Day" written under it. This went on for an hour, after which the computer system started working again.

"It appears that someone introduced a computer virus into our system that affected every program in the network. The virus program was activated by a time and date. Once the program had run its course, our system returned to normal.

"We have no way of knowing just what else this program did. We still don't know how this virus got into the system. It could have been entered by one of our employees playing a joke or by someone breaking into our computer through our modem access, or the program could have come through one of the purchased programs we use. We have spent a lot of time and money trying to remove this program and appear to have succeeded."

After you explained the virus incident to the audit partner, he asked you to provide him with a memo discussing the auditing implications of this event.

Required: Prepare the memo to the partner

Solution Preview


To: Audit Partner
Re: Campbell's Toy Store - audit implications of computer virus
March 22, 2005

Date of virus infection: February 14, 2005
Audit Year end: February 28, 2005

Testing prior to year end: Both inventory and internal control testing was completed in January 2005, prior to the virus infection. As a result, the validity of that testing is possibly compromised. We can retest the controls, but even so, we may ...

Solution Summary

The solution offers several additional procedures which might be considered as a result of the virus. There are eight specific items, most of which deal with the issue of internal controls. Also included is a link to a site in which a similar problem occurred.