File Investigation Report
CSSRSS.EXE
System Back DoorPC Cleanup in 3 Easy Steps
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Associated Malware Groups
The filename is associated with the malware groups:
- System Back Door
- Cloaked Malware
File Behavior
CSSRSS.EXE has been seen to perform the following behavior:
- This Process Deletes Other Processes From Disk
- Loads and Executes a System Driver File
- This process creates other processes on disk
- Executes Processes stored in Temporary Folders
- Executes a Process
- Registers a Dynamic Link Library File
- Creates a TCP port which listens and is available for communication initiated by other computers
- Can communicate with other computer systems using HTTP protocols
- Creates a new Background Service on the machine
- The Process is packed and/or encrypted using a software packing process
- Uses DNS to retrieve the IP address for web sites
- Enables an In Process Object/Server - Common with DLL Injections
- Adds a Registry Key (DELAY) to auto start Programs on system start up
CSSRSS.EXE has been the subject of the following behavior:
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Terminated as a Process
- Deleted as a process from disk
- Executed by Internet Explorer
- Created as a process on disk
- Added as a Registry auto start to load Program on Boot up
- Copied to multiple locations on the system
- Created as a new Background Service on the machine
Country Of Origin
The filename CSSRSS.EXE was first seen on Jun 21 2007 in the following geographical regions of the Prevx community:
- GERMANY on Jun 21 2007
- The EUROPEAN UNION on Aug 31 2007
- The UNITED STATES on Aug 31 2007
- CANADA on Apr 6 2008
- SPAIN on May 8 2008
File Name Aliases
CSSRSS.EXE can also use the following file names:
- RMQA.EXE
- BQYO.EXE
- CIQBPR.EXE
- TTOP.EXE
- YFFN.EXE
- DKEA.EXE
- OOMV.EXE
- NLOE.EXE
- TUQRWOCSKPA.EXE
- LFQFFODA.EXE
- WVUK3K.EXE
- AVBSQEPY.EXE
- NXOB0B.EXE
- R1RE6Y.EXE
- GGGJ.EXE
- GAKJ.EXE
- NWGY.EXE
- ITQH.EXE
- GEYK.EXE
- NSOC.EXE
- M7BTU6.EXE
- SG7TO4.EXE
- DFRU.EXE
- CGYSGZ.EXE
- L0PEN0.EXE
- GEOF.EXE
- YNUDP.EXE
- DOBMMIEM.EXE
- SYSXPCW.EXE
- FILE[1].EXE
- SYSMRHD.EXE
- SYSVMRH.EXE
- SYSXQWI.EXE
- YTEI.EXE
- ROFK.EXE
- U5CFDT.EXE
- VTIUQ8.EXE
- G9786B.EXE
Filesizes
The following file size has been seen:
- 10,192 bytes
- 16,464 bytes
- 1,052,672 bytes
- 14,192 bytes
- 30,720 bytes
- 1,084,492 bytes
File Type
The filename CSSRSS.EXE refers to many versions of an executable program.
File Activity
One or more files with the name CSSRSS.EXE creates, deletes, copies or moves the following files and folders:
- Creates c:\windows\system32\i1oV4Q.syz
- Moves c:\windows\system32\i1oV4Q.syz to System32\drivers\dmboot.sys
- Moves c:\windows\system32\zyEX1q.syz to System32\drivers\dmboot.sys
- Moves c:\windows\system32\tlntsvr.exe to c:\windows\system32\zyEX1q.syz
- Moves c:\windows\system32\i1oV4Q.syz to c:\windows\system32\tlntsvr.exe
- Moves c:\windows\system32\tlntsvr.exe to c:\windows\system32\i1oV4Q.syz
- Moves c:\windows\system32\zyEX1q.syz to c:\windows\system32\tlntsvr.exe
- Creates c:\docume~1\user\locals~1\temp\qcrbpOgXm.exe
- Creates c:\docume~1\user\locals~1\temp\9UxoyB1p.exe
- Creates c:\docume~1\user\locals~1\temp\knXSib0.exe
- Deletes c:\docume~1\user\locals~1\temp\qcrbpOgXm.exe
- Creates c:\docume~1\user\locals~1\temp\1C.tmp
- Deletes c:\docume~1\user\locals~1\temp\1F.tmp
- Creates c:\windows\system32\ctfmonb.bmp
- Moves c:\docume~1\user\locals~1\temp\9UxoyB1p.exe to c:\windows\system32\ctfmona.exe
- Deletes c:\windows\system32\ctfmona.exe
- Creates c:\documents and settings\user\local settings\temp\.tt1
- Deletes c:\documents and settings\user\local settings\temp\.tt1
- Creates c:\windows\system32\blackster.scr
- Opens/modifes c:\autoexec.bat
- Deletes c:\documents and settings\user\local settings\temp\.tt2
- Creates c:\documents and settings\user\local settings\temp\.tt2
- Creates c:\windows\system32\sockins32.dll
- Deletes c:\windows\system32\lt.res
- Creates c:\windows\system32\sft.res
- Creates c:\windows\index.htm
- Deletes c:\docume~1\user\locals~1\temp\knXSib0.ex
Network Activity
One or more files with the name CSSRSS.EXE performs the following network events:
- DNS Lookup192.168.0.4 MICHELLE-FA9C3E9A
- DNS Lookup78.109.30.1 6lw.info
- DNS Lookup78.109.30.1 78.109.30.1
Website Activity
One or more files with the name CSSRSS.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- Port 80 IP:78.109.30.1
- Port 80 IP:207.46.225.221
- Port 80 IP:216.240.138.207
- Port 80 IP:64.27.28.155
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