ThreatExpert Report: Worm.Win32.VBNA.c, Troj/RebhipCn-A

Submission Summary:

Submission details:

Submission received: 31 August 2012, 10:38:30
Processing time: 11 min 6 sec
Submitted sample:

File MD5: 0xFEBE44E65C300B960F8D5A94AC7621E3
File SHA-1: 0x4DC7BDD59BAE66580BC29116AEE856867FDE7358
Filesize: 381,980 bytes
Alias: Worm.Win32.VBNA.c [Kaspersky Lab]

Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A network-aware worm that attempts to replicate across the existing network(s)

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\lmhosts\lmhosts.exe [file and pathname of the sample #1]	381,980 bytes	MD5: 0xFEBE44E65C300B960F8D5A94AC7621E3 SHA-1: 0x4DC7BDD59BAE66580BC29116AEE856867FDE7358	Worm.Win32.VBNA.c [Kaspersky Lab]
2	%AppData%\%UserName%log.dat	15 bytes	MD5: 0xBF3DBA41023802CF6D3F8C5FD683A0C7 SHA-1: 0x466530987A347B68EF28FAAD238D7B50DB8656A5	Troj/RebhipCn-A [Sophos]
3	%Temp%\autoinicio.vbs	314 bytes	MD5: 0x7138C6B2C2310BDBE9EBD602467405C6 SHA-1: 0x92BD4116A09CCCDABAF7C811A586F619803A1ED7	(not available)
4	%Temp%\%UserName%7 %Temp%\%UserName%8	8 bytes	MD5: 0x7DEA362B3FAC8E00956A4952A3D4F474 SHA-1: 0x05FE405753166F125559E7C9AC558654F107C7E9	(not available)

Notes:

%AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
%Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).

The following directory was created:

%AppData%\lmhosts

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	81,920 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	81,920 bytes

There were new memory pages created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes
lmhosts.exe	%AppData%\lmhosts\lmhosts.exe	413,696 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host
HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host\Settings
HKEY_CURRENT_USER\Software\remoto

The newly created Registry Values are:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

lmhosts = "%APPDATA%\lmhosts\lmhosts.exe"

so that lmhosts.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\remoto]

FirstExecution = "31/08/2012 -- 10:38"
NewIdentification = "remoto"
NewGroup = ""

Other details

To mark the presence in the system, the following Mutex objects were created:

Y3TT62F1D88DQ1
UserName4
Y3TT62F1D88DQ1_SAIR
UserName5
UserName1

The following Host Names were requested from a host database:

jaer83.no-ip.org
192.5.5.241

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
jaer83.no-ip.org	81

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 81:

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