Worm.Yimfoca
Posted: May 18, 2011
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
Threat Level: | 5/10 |
---|---|
Infected PCs: | 246 |
First Seen: | March 17, 2011 |
---|---|
OS(es) Affected: | Windows |
Worm.Yimfoca is a harmful computer worm that propagates through popular instant messaging programs and social networking websites, such as MSN Messenger, Skype, Yahoo! Messenger and AOL Instant Messenger. Worm.Yimfoca will connect to remote HTTP or IRC servers, which will allow it to receive updated configuration data. Worm.Yimfoca will also make modifications to specific security and system settings on the corrupted PC. Worm.Yimfoca will also try to stop Windows Automatic Updates and the Microsoft Antimalware service by running various commands on the computer system.
File System Modifications
- The following files were created in the system:
# File Name 1 %windir%\nvsvc32.exe
Registry Modifications
- The following newly produced Registry Values are:
HKEY..\..\..\..{Subkeys}HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
Aliases
More aliases (365)
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:%PUBLIC%\csrss.exe
File name: csrss.exeSize: 200.76 KB (200766 bytes)
MD5: 54f7a9c68501da25fc40375454f93783
Detection count: 73
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: June 28, 2011
%PUBLIC%\nvsvc32.exe
File name: nvsvc32.exeSize: 147.96 KB (147968 bytes)
MD5: 482c17eb517f9490293dedaf6e5013fd
Detection count: 32
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: April 4, 2011
%WINDIR%\SysWOW64\config\systemprofile\AppData\Local\Windows Internet Name Service\wins.exe
File name: wins.exeSize: 4.84 MB (4849152 bytes)
MD5: 1c2fdee5074f0c45f0e63dc99e6bf26c
Detection count: 16
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\SysWOW64\config\systemprofile\AppData\Local\Windows Internet Name Service
Group: Malware file
Last Updated: March 18, 2011
%WINDIR%\nvsvc32.exe
File name: nvsvc32.exeSize: 115.71 KB (115712 bytes)
MD5: 5438437773295fef2e9f847438c7ab1d
Detection count: 14
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%
Group: Malware file
Last Updated: August 5, 2011
%WINDIR%\csrss.exe
File name: csrss.exeSize: 102.4 KB (102400 bytes)
MD5: 9691269318725bd23dd1b805b69ef6a7
Detection count: 12
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%
Group: Malware file
Last Updated: September 5, 2011
%PUBLIC%\nvsvc32.exe
File name: nvsvc32.exeSize: 44.03 KB (44032 bytes)
MD5: 6161d9a3f762ba6ae27ce2b969afb0b5
Detection count: 9
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: April 13, 2011
%WINDIR%\nvsvc32.exe
File name: nvsvc32.exeSize: 206.33 KB (206336 bytes)
MD5: 46bbe6e9c00f559ba52ab0de32b3c619
Detection count: 7
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%
Group: Malware file
Last Updated: May 13, 2011
%WINDIR%\system32\repsvc.exe
File name: repsvc.exeSize: 172.03 KB (172032 bytes)
MD5: 0fb55d6c5b841265938a274a15c9be81
Detection count: 7
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\system32
Group: Malware file
Last Updated: May 3, 2011
%PUBLIC%\nvsvc32.exe
File name: nvsvc32.exeSize: 184.32 KB (184320 bytes)
MD5: a0da3a6347ed54a807a115114bc76bfa
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: April 18, 2011
%PUBLIC%\csrss.exe
File name: csrss.exeSize: 59.9 KB (59904 bytes)
MD5: 01df5361ab76f8d829d43b30eab422fb
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: July 18, 2011
%PUBLIC%\nvsvc32.exe
File name: nvsvc32.exeSize: 98.3 KB (98304 bytes)
MD5: 469c894ae9f8265bb67c747d7031583c
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Path: %PUBLIC%
Group: Malware file
Last Updated: February 22, 2013
%WINDIR%\nvsvc32.exe
File name: nvsvc32.exeSize: 51.71 KB (51712 bytes)
MD5: 7726f958dbbef0cb644de04546573d75
Detection count: 3
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%
Group: Malware file
Last Updated: April 15, 2011
%USERPROFILE%\Mes documents\downloads\facebook-pic00320123561 (4).exe
File name: facebook-pic00320123561 (4).exeSize: 157.18 KB (157184 bytes)
MD5: 32834222b0ad33984c3968d526759d69
Detection count: 3
File type: Executable File
Mime Type: unknown/exe
Path: %USERPROFILE%\Mes documents\downloads
Group: Malware file
Last Updated: September 29, 2011
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