WORM_SILLY.KG
Trojan:Win32/Fakefolder.C (Microsoft); W32/Autorun!6E82C4906FB1 (McAfee); Trojan.Gen (Symantec); Worm.Win32.FakeFolder.a (Kaspersky); W32/Autorun-BVR (Sophos); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan horse Downloader.Zlob.BJHO (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
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.
Other System Modifications
This worm adds the following registry keys:
HKEY_CLASSES_ROOT\.caca
HKEY_CLASSES_ROOT\cacafile\shell\
open\command
Dropping Routine
This worm drops the following files:
- %Program Files%\system.caca
- %Program Files%\Internet Explorer\WINLOGON.exe
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
This report is generated via an automated analysis system.
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
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CLASSES_ROOT
- .caca
- In HKEY_CLASSES_ROOT\cacafile\shell\open
- command
Step 3
Search and delete these components
- %Program Files%\system.caca
- %Program Files%\Internet Explorer\WINLOGON.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as WORM_SILLY.KG. 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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