ThreatExpert Report: W32.Downadup.B, Net-Worm.Win32.Kido.ih, W32/Conficker.worm.gen.a..

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Submission Summary:

Submission details:

Submission received: 7 August 2012, 20:37:29
Processing time: 9 min 23 sec
Submitted sample:

File MD5: 0x7A5ACD7DA5A5D7845A4BCD1A90019E69
File SHA-1: 0x4025377B5A5CAA695C386EEEAF54459C282811EE
Filesize: 167,403 bytes
Alias:

W32.Downadup.B [Symantec]
Net-Worm.Win32.Kido.ih [Kaspersky Lab]
W32/Conficker.worm.gen.a [McAfee]
Mal/Conficker-A [Sophos]
Worm:Win32/Conficker.B [Microsoft]
Trojan-Downloader.Win32.Kido [Ikarus]
Win32/Conficker.worm.73000 [AhnLab]

Summary of the findings:

What's been found	Severity Level
Replication across networks by exploiting weakly restricted shares (common for Randex family of worms).
Contains characteristics of Conficker/Downadup/Kido, a worm that spreads by exploiting the Microsoft Windows Server Service RPC Handling Remote Code Execution Vulnerability.
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.
Can possibly obtain IP address (of the compromised computer) by connecting to several specific URLs.
Can potentially create the file autorun.inf on any accessible mapped drive so that it executes whenever the drive is accessed.
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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[file and pathname of the sample #1]	167,403 bytes	MD5: 0x7A5ACD7DA5A5D7845A4BCD1A90019E69 SHA-1: 0x4025377B5A5CAA695C386EEEAF54459C282811EE	W32.Downadup.B [Symantec] Net-Worm.Win32.Kido.ih [Kaspersky Lab] W32/Conficker.worm.gen.a [McAfee] Mal/Conficker-A [Sophos] Worm:Win32/Conficker.B [Microsoft] Trojan-Downloader.Win32.Kido [Ikarus] Win32/Conficker.worm.73000 [AhnLab]

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[generic host process]	[generic host process filename]	20,480 bytes

Note:

[generic host process filename] is a full path filename of [generic host process].

Heuristics Analysis

Heuristically identified capability of spreading across the following weakly restricted network shares:

The network replication uses a dictionary attack by probing credentials from the following list:

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