Submission Summary:

What's been foundSeverity Level
Capability to block security-related software by modifying firewall settings and by disabling security services, such as Windows Update, Norton Autoprotect, Kaspersky Anti-Virus, etc.
Produces outbound traffic.
There were some system executable files modified, which might indicate the presence of a PE-file infector.
Contains characteristics of an identified security risk.

 

Technical Details:

 

Possible Security Risk

Threat CategoryDescription
A virus capable to modify other files by infecting, prepending, or overwriting them them with its own body

 

File System Modifications

#Filename(s)File SizeFile HashAlias
1 %System%\rebfec.exe
[file and pathname of the sample #1]
131,072 bytes MD5: 0x023956922529907C30952AEAC55D6530
SHA-1: 0x8DCC82E2BA5577A61C2C4703A37F7A7BECC07B87
W32.Ramnit!inf [Symantec]
Virus.Win32.Nimnul.a [Kaspersky Lab]
W32/Ramnit.a [McAfee]
W32/Patched-I [Sophos]
Virus:Win32/Ramnit.A [Microsoft]
Virus.Win32.Virut [Ikarus]
Win32/Ramnit.B [AhnLab]
2 %System%\rebfecSrv.exe 86,528 bytes MD5: 0x954549B833A70015D055F70D0E3BA7D4
SHA-1: 0xF3190B932BB48530067DAB198471E23CE2FFEA56
W32.Virut.CF [Symantec]
Packed.Win32.Krap.hm [Kaspersky Lab]
PWS-Zbot.gen.pq [McAfee]
W32/Scribble-B [Sophos]
Virus:Win32/Virut.BN [Microsoft]
Virus.Win32.Virut [Ikarus]
3 [part of the sample filename]1Srv.exe 86,528 bytes MD5: 0x0AC6EB8C84BEE5EC2138BE42A766F0D6
SHA-1: 0xCAAF9D2C520A9DE5DB85289FB8EAABD1AB982BF9
W32.Virut.CF [Symantec]
Packed.Win32.Krap.hm [Kaspersky Lab]
PWS-Zbot.gen.pq [McAfee]
W32/Scribble-B [Sophos]
Virus:Win32/Virut.BN [Microsoft]
Virus.Win32.Virut [Ikarus]

 

Memory Modifications

Process NameProcess FilenameMain Module Size
rebfec.exe%System%\rebfec.exe131,072 bytes
rebfecSrv.exe%System%\rebfecSrv.exe77,824 bytes
[filename of the sample #1][file and pathname of the sample #1]131,072 bytes

Service NameDisplay NameStatusService Filename
Abcdef Hijklmno QrsAbcdefgh Jklmnopqr Tuvwxya Cdefghij Lmn"Running"%System%\rebfec.exe

 

Registry Modifications

 

Other details

China
Russian Federation

PortProtocolProcess
1035TCPrebfec.exe (%System%\rebfec.exe)

Remote HostPort Number
103.229.29.8110002
cmodil.com443
83.133.119.19780

 

Outbound traffic (potentially malicious)

 

 

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