ThreatExpert Report: Backdoor.Win32.Wkysol, Trojan.Win32.Genome

Submission Summary:

Submission details:

Submission received: 21 September 2012, 08:36:15
Processing time: 8 min 5 sec
Submitted sample:

File MD5: 0xFFC28BC62F3B9E8A1AA4C1FAF32DE653
File SHA-1: 0x83F275C30F2817D2B7404591AEDDC5B2C5C6639D
Filesize: 114,635 bytes
Alias: Backdoor.Win32.Wkysol [Ikarus]

Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
Downloads/requests other files from Internet.
Creates a startup registry entry.

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%LocalSettings%\lsm.exe	8,192 bytes	MD5: 0xC1068A488CEEE9AFCCA6286354B859B2 SHA-1: 0x49DE8A4824FE04B3B1A59035B82D58FFDADBED6A	Trojan.Win32.Genome [Ikarus]
2	%LocalSettings%\wship4.tmp	30,720 bytes	MD5: 0x61F6FF6A0C0702A8D24199A6D7675120 SHA-1: 0xC5EC0541127AB6DABFAA128B01D71098978CE123	Backdoor.Win32.Wkysol [Ikarus]
3	[file and pathname of the sample #1]	114,635 bytes	MD5: 0xFFC28BC62F3B9E8A1AA4C1FAF32DE653 SHA-1: 0x83F275C30F2817D2B7404591AEDDC5B2C5C6639D	Backdoor.Win32.Wkysol [Ikarus]

Note:

%LocalSettings% is a variable that specifies the current user's local settings folder. By default, this is C:\Documents and Settings\[UserName]\Local Settings (Windows NT/2000/XP).

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
lsm.exe	%LocalSettings%\lsm.exe	16,384 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	176,128 bytes
algsvc.exe	%UserProfile%\LOCALS~1\algsvc.exe	16,384 bytes
lsm.exe	%UserProfile%\locals~1\lsm.exe	16,384 bytes

Notes:

%UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (Windows NT/2000/XP).

Registry Modifications

The following Registry Key was created:

HKEY_CURRENT_USER\Software\WinRAR SFX

The newly created Registry Values are:

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

offices = "%UserProfile%\locals~1\lsm.exe"

so that lsm.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\WinRAR SFX]

C%%DOCUME~1%%UserName%%LOCALS~1%Temp%..% = "%Temp%\..\"

Other details

To mark the presence in the system, the following Mutex object was created:

_SHuassist.mtx

The following Host Name was requested from a host database:

192.5.5.241

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

Remote Host	Port Number
192.5.5.241	443

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
www.betterslife.com	443	(null)	(null)

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 443:

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