Date: 09 July 2007
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A U S C E R T A L E R T
AL-2007.0081 -- AUSCERT ALERT
High volume of email linking to the "Storm Worm" malware
9 July 2007
AusCERT Alert Summary
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
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AusCERT has observed very large amounts of email purporting to be
greeting cards and security updates containing links to malware.
This malware is a variant of what is widely known as the "Storm
worm", but also known as Tibs or Peacomm .
A user visiting the links contained in these emails is will be
prompted to install malicious software. This software contains
backdoor functionality to allow a remote attacker to fully control
a system. This malware also uses an encrypted P2P control mechanism.
Currently, this malware is not well detected by many anti-virus
vendors. AusCERT has observed more than 50 sites hosting this
Users should avoid clicking on any links in email, unless the email
was already expected. Unsolicited e-mail should always be treated
with suspicion. Additional countermeasures for protecting Windows
systems can be found on the AusCERT web site .
Administrators may wish to examine proxy logs for connections to
malicious URLs and mail logs for suspicious messages (see below for
more information) which may indicate possible infections.
The subject of the malicious email is of the form:
"You've received a greeting card from a: "
followed by one of the following:
Another varient has the following subject:
and with a body of:
Our robot has detected an abnormal activity from your IP adress
on sending e-mails. Probably it is connected with the last epidemic
of a worm which does not have official patches at the moment
We recommend you [URL] to install this patch to remove worm files
and stop email sending, otherwise your account will be blocked.
The URLs contained in these emails are of the form:
where [IP] is an IP address of the site hosting the trojan. AusCERT
has observed over 50 of these IPs and there is a high likelyhood of
other (currently unknown) sites hosting malware in the future. The
[random string] appears to be a variable length (AusCERT has
observed string lengths ranging from 23 to 32 characters)
hexadecimal digits. These pages link to malware (named either
patch.exe or ecard.exe).
 F-Secure Malware Information Pages: Small.DAM
 Protecting your computer from malicious code
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which may arise from following or acting on information or advice contained in
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If you believe that your computer system has been compromised or attacked in
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Incident Reporting Form at:
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Internet Email: firstname.lastname@example.org
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