ThreatExpert Report: Worm:Win32/Hamweq.A

Submission Summary:

Submission details:

Submission received: 6 October 2012, 06:01:17
Processing time: 7 min 57 sec
Submitted sample:

File MD5: 0x82AF1773D6DE030F109A4C9BEB2216A9
File SHA-1: 0x9D9CC4BFAA899A62BCF620D58F32CD2D346AC446
Filesize: 61,952 bytes
Alias: Worm:Win32/Hamweq.A [Microsoft]

Summary of the findings:

What's been found	Severity Level
Creates desktop.ini system file in the fake Recycle Bin folder in order to register it in Windows as a valid Recycle Bin.
Creates an executable file in the fake Recycle Bin folder with the purpose of concealing its presence in the system.
Creates fake Recycle Bin folder.
Communication with a remote IRC server.
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 malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	c:\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini	62 bytes	MD5: 0x7457A5DF1FF47C957ACF1FA000D7D9AD SHA-1: 0x69D2BBA827FD4DE0169419A0FDA280252B348514	(not available)
2	c:\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\hostsv.exe [file and pathname of the sample #1]	61,952 bytes	MD5: 0x82AF1773D6DE030F109A4C9BEB2216A9 SHA-1: 0x9D9CC4BFAA899A62BCF620D58F32CD2D346AC446	Worm:Win32/Hamweq.A [Microsoft]

The following directory was created:

c:\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013

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]	86,016 bytes
hostsv.exe	c:\recycler\r-1-5-21-1482476501-1644491937-682003330-1013\hostsv.exe	86,016 bytes

Registry Modifications

The newly created Registry Value is:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]

Taskman = "c:\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\hostsv.exe"

so that hostsv.exe runs every time Windows starts

Other details

Analysis of the file resources indicate the following possible country of origin:

Belgium

The following Host Name was requested from a host database:

tv.zaberno.com

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

Remote Host	Port Number
tv.zaberno.com	3324

Outbound traffic (potentially malicious)

Attention! There was a new connection established with a remote IRC Server. The generated outbound IRC traffic is provided below:

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