WORM_PIZZER.SM
Trojan.MSIL.Crypt.aagf (Kaspersky)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This malware propagates by creating copies of itself in password-protected archives. It also downloads other malware onto the systems it infects, causing malicious routines to be exhibited.
To get a one-glance comprehensive view of the behavior of this Worm, refer to the Threat Diagram shown below.
![](https://documents.trendmicro.com/images/worm_pizzer_sm.jpg)
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
Arrival Details
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Download Routine
This worm accesses the following websites to download files:
- http://tazbox.{BLOCKED}o.org/downloader/kl/AppLauncher.exe
- http://tazbox.{BLOCKED}o.org/downloader/miner/dwm.exe
It saves the files it downloads using the following names:
- %Application Data%\Microsoft\Internet Explorer\AppLauncher.exe
- %Application Data%\Microsoft\windows\dwm.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Other Details
This worm opens the following applications:
- Winrar.exe
NOTES:
This worm drops copies of itself in archives (.ZIP, .RAR, and .RAR SFX) in %System Root% and subfolders as follows:
- {malware folder}\{malware filename}
- a {archive path} {malware path}
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Search and delete these files
- %Application Data%\Microsoft\Internet Explorer\AppLauncher.exe
- %Application Data%\Microsoft\windows\dwm.exe
Step 3
Scan your computer with your Trend Micro product to delete files detected as WORM_PIZZER.SM . If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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