ThreatExpert Report: W32.Fujacks.B, W32/Fujacks.gen, Mal/DelpDldr-C, Trojan-Notifier.Win32.EES..

Submission Summary:

Submission details:

Submission received: 5 July 2012, 04:36:14
Processing time: 10 min 21 sec
Submitted sample:

File MD5: 0x22907563F2AA01A3C5BF05A7168B4B4C
File SHA-1: 0x5D1FDCBC26A6837FA69027871229DA54DEAD3AE1
Filesize: 484,141 bytes
Alias:

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 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	%Temp%\83$$.bat	271 bytes	MD5: 0xB06A967B26F3D664E73953F3D609C194 SHA-1: 0xC8C44A67E4AAAE3473F4107F519FD2BB08B6F9FB	(not available)
2	%System%\aos2svc.exe.exe	154,384 bytes	MD5: 0x839FA3CE255ABE3422432F2055CE602B SHA-1: 0x046DF246F4B61F2C483C0028DD64B0D516E6A76F	(not available)
3	%System%\aos2svc.log	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
4	[file and pathname of the sample #1]	484,141 bytes	MD5: 0x22907563F2AA01A3C5BF05A7168B4B4C SHA-1: 0x5D1FDCBC26A6837FA69027871229DA54DEAD3AE1	W32.Fujacks.B [Symantec] W32/Fujacks.gen [McAfee] Mal/DelpDldr-C [Sophos] Trojan-Notifier.Win32.EES [Ikarus]
5	%System%\spoclsv.exe	329,728 bytes	MD5: 0x9F5485BA84280B7B8B964CD2EEEEB750 SHA-1: 0x42C0D84547CA0AC37F2CE2F1C1B5DC48FFC56404	W32.Fujacks.B [Symantec] W32/Fujacks.az [McAfee] Mal/DelpDldr-C [Sophos] Trojan-Notifier.Win32.EES [Ikarus]

Notes:

%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).
%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
aos2svc.exe.exe	%System%\aos2svc.exe.exe	147,456 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	352,256 bytes

Other details

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

	Republic of Korea
	China

Heuristics Analysis

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

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