CRYPTS.DLL, Prevx

Associated Malware Groups

The filename is associated with the malware groups:

Information Stealer
Cloaked Malware
Malicious Software
Malware Downloader

File Behavior

CRYPTS.DLL has been seen to perform the following behavior:

The Process is packed and/or encrypted using a software packing process
Found on infected systems and resists interrogation by security products
Downloads hidden code from covert web sites
This Process is a file infector which modifies program files to include a copy of the infection
This process creates other processes on disk
Executes a Process
Downloads program file(s) and other content from the web
Looks at the contents of the autoexec.bat file
Reads email address and phone book details
Visits web sites on your PC without you knowing

CRYPTS.DLL has been the subject of the following behavior:

Created as a process on disk
Registered as a Dynamic Link Library File
Added as a Winlogon Notification DLL to automatically load on system start up
Deleted as a process from disk
Executed as a Process
Added as a Registry Key (RUNONCE) to auto start Programs on system start up

Country Of Origin

The filename CRYPTS.DLL was first seen on May 18 2007 in the following geographical regions of the Webroot community:

The United States on May 18 2007
Spain on May 31 2007
Argentina on May 31 2007
Europe on Oct 14 2008
Italy on Oct 14 2008
India on Mar 23 2009
Poland on Apr 7 2009
Serbia on Apr 7 2009

File Name Aliases

CRYPTS.DLL can also use the following file names:

CRYPTS(2).DLL
CRYPTS-8A7AA831__REPEAT_.DLL.MAL.MZ.EXE
CRYPTS.DLL.DEL
CRYPTS(n).DLL
PREVX_CRYPTS.DLL
CR.DLL
CRYPTS.DLL_OLD
01C9AD59D7894500_CRYPTS_DLL.PE
56578722.DLL
72825769.DLL

Filesizes

The following file size has been seen:

32,768 bytes
29,696 bytes
33,792 bytes
122,880 bytes
33,280 bytes
23,040 bytes

File Type

The filename CRYPTS.DLL refers to many versions of a dynamic link library.

File Activity

One or more files with the name CRYPTS.DLL creates, deletes, copies or moves the following files and folders:

Opens/modifes c:\autoexec.bat
Deletes c:\docume~1\user\locals~1\temp\5907.tmp
Deletes c:\docume~1\user\locals~1\temp\96EA.tmp
Deletes c:\docume~1\user\locals~1\temp\B951.tmp
Deletes c:\docume~1\user\locals~1\temp\DDE8.tmp
Creates c:\docume~1\user\locals~1\temp\Cab12.tmp
Creates c:\docume~1\user\locals~1\temp\Tar14.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab12.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar14.tmp
Creates c:\docume~1\user\locals~1\temp\CabC.tmp
Creates c:\docume~1\user\locals~1\temp\TarE.tmp
Deletes c:\docume~1\user\locals~1\temp\CabC.tmp
Deletes c:\docume~1\user\locals~1\temp\TarE.tmp
Creates c:\docume~1\user\locals~1\temp\Cab1F.tmp
Creates c:\docume~1\user\locals~1\temp\Tar21.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab1F.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar21.tmp
Creates c:\docume~1\user\locals~1\temp\Cab2F.tmp
Creates c:\docume~1\user\locals~1\temp\Tar31.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab2F.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar31.tmp
Creates c:\docume~1\user\locals~1\temp\Cab4C.tmp
Creates c:\docume~1\user\locals~1\temp\Tar4E.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab4C.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar4E.tmp
Creates c:\docume~1\user\locals~1\temp\Cab59.tmp
Creates c:\docume~1\user\locals~1\temp\Tar5B.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab59.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar5B.tmp
Creates c:\docume~1\user\locals~1\temp\Cab6A.tmp
Creates c:\docume~1\user\locals~1\temp\Tar6C.tmp
Deletes c:\docume~1\user\locals~1\temp\Cab6A.tmp
Deletes c:\docume~1\user\locals~1\temp\Tar6C.tmp

Website Activity

One or more files with the name CRYPTS.DLL interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.

TCP:127.0.0.1:1082 Port:16
Port 80 IP:202.73.56.153
Port 80 IP:68.180.151.74
/ login .srf?wa=wsignin1 .0&rpsnv=10&ct=1224132350&rver=4 .5 .2130 .0&wp=MBI&wreply=http:%2F%2Fmail .live .com%2Fdefault .aspx&id=64855
/ ppsecure / post .srf?wa=wsignin1 .0&rpsnv=10&ct=1224132350&rver=4 .5 .2130 .0&wp=MBI&wreply=http:%2F%2Fmail .live .com%2Fdefault .aspx&id=64855&bk=1224132351
Remote server connection to microsoft .co
Remote server connection to 85 .17 .201 .6
Remote server connection to 195 .24 .77 .17
Remote server connection to hotmail .co
Remote server connection to lc2 .bay0 .hotmail .passport .co
Remote server connection to mail .live .co
Remote server connection to login .live .co
Remote server connection to bl143w .blu143 .mail .live .co
Remote server connection to 85 .17 .168 .14
Remote server connection to hipservice .live .co
Port 80 IP:207.46.232.182
TCP:85.17.201.65:443 Port:17
TCP:195.24.77.177:443 Port:17
Port 80 IP:64.4.33.7
Port 80 IP:207.46.10.121
Port 80 IP:65.54.186.17
TCP:65.54.186.17:443 Port:21
Port 80 IP:84.53.137.16
TCP:85.17.168.141:443 Port:22
TCP:85.17.168.141:443 Port:22
TCP:195.24.77.177:443 Port:22
TCP:85.17.201.65:443 Port:22
TCP:65.54.234.11:443 Port:22
TCP:85.17.168.141:443 Port:22
TCP:195.24.77.177:443 Port:22
Remote server connection to 202 .73 .56 .15
Remote server connection to 89 .149 .254 .1
Port 25 IP:127.0.0.1
TCP:202.73.56.153:443 Port:17
TCP:89.149.254.14:443 Port:24
Port 80 IP:65.54.199.140
Port 80 IP:66.235.138.1
TCP:65.55.196.188:443 Port:27
TCP:65.54.186.17:443 Port:27
TCP:88.221.165.186:443 Port:27
Port 25 IP:88.221.165.186
TCP:66.235.139.70:443 Port:28
TCP:65.54.234.11:443 Port:29
TCP:89.149.254.14:443 Port:29
TCP:65.54.186.17:443 Port:26
TCP:88.221.165.186:443 Port:26
TCP:65.55.196.188:443 Port:27
TCP:66.235.139.70:443 Port:27
TCP:65.54.234.11:443 Port:28
TCP:89.149.254.14:443 Port:28

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CRYPTS.DLL

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