ThreatExpert Report: W32.Downadup.B, Net-Worm.Win32.Kido.ih, Mal/Conficker-A, Virus.Worm.Downadup..

Visit ThreatExpert web site

Close Report

Submission Summary:

Submission details:

Submission received: 8 September 2012, 11:04:29
Processing time: 9 min 10 sec
Submitted sample:

File MD5: 0x13D25631B2729D4BED6A9AB100432B79
File SHA-1: 0x551FAF78A53992818D39FF09BB307BF8C393237C
Filesize: 168,989 bytes
Alias & packer info:

W32.Downadup.B [Symantec]
Net-Worm.Win32.Kido.ih [Kaspersky Lab]
Mal/Conficker-A [Sophos]
Virus.Worm.Downadup [Ikarus]
Win-Trojan/Agent.166512 [AhnLab]
packed with: UPX [Kaspersky Lab]

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]	168,989 bytes	MD5: 0x13D25631B2729D4BED6A9AB100432B79 SHA-1: 0x551FAF78A53992818D39FF09BB307BF8C393237C	W32.Downadup.B [Symantec] Net-Worm.Win32.Kido.ih [Kaspersky Lab] Mal/Conficker-A [Sophos] Virus.Worm.Downadup [Ikarus] Win-Trojan/Agent.166512 [AhnLab] packed with UPX [Kaspersky Lab]

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:

All content ("Information") contained in this report is the copyrighted work of Threat Expert Ltd and its associated companies ("ThreatExpert") and may not be copied without the express permission of ThreatExpert.

The Information is provided on an "as is" basis. ThreatExpert disclaims all warranties, whether express or implied, to the maximum extent permitted by law, including the implied warranties that the Information is merchantable, of satisfactory quality, accurate, fit for a particular purpose or need, or non-infringing, unless such implied warranties are legally incapable of exclusion. Further, ThreatExpert does not warrant or make any representations regarding the use or the results of the use of the Information in terms of their correctness, accuracy, reliability, or otherwise.