Submission Summary:

• Submission details:
• Submission received: 10 November 2009, 14:30:13
• Processing time: 5 min 39 sec
• Submitted sample:
• File MD5: 0xCC5AC2CC51D1934A3BA9A7DE27655F30
• File SHA-1: 0x329656D32F5E78CF87F876AA9D62C20BB0531507
• Filesize: 86,257 bytes
• Alias:
• Backdoor.IRC [PCTools]
• Backdoor.IRC.Bot [Symantec]
• Backdoor.Win32.IRCBot.jvw [Kaspersky Lab]
• Mal/Bckdr-C, Mal/Inject-M [Sophos]
• Backdoor:Win32/Agent [Microsoft]
• Virus.Win32.Injector [Ikarus]
• Win32/IRCBot.worm.variant [AhnLab]

• Summary of the findings:

What's been found	Severity Level
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Backdoor.Bifrose	Backdoor.Bifrose is a backdoor trojan that attempts to propagate by exploiting local network shares. It will also attempt to join a predefined IRC server and channel in order to participate in DDoS attacks.

• Attention! The following threat category was identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\addons.dat	24,793 bytes	MD5: 0xE462B5789CC8B5A44407E9B2FE32F067 SHA-1: 0x20804AB3C0A9F9AFA20DDF78A406455A12748749	(not available)
2	%System%\Bifrost\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
3	%System%\Bifrost\server.exe [file and pathname of the sample #1]	86,257 bytes	MD5: 0xCC5AC2CC51D1934A3BA9A7DE27655F30 SHA-1: 0x329656D32F5E78CF87F876AA9D62C20BB0531507	Backdoor.IRC [PCTools] Backdoor.IRC.Bot [Symantec] Backdoor.Win32.IRCBot.jvw [Kaspersky Lab] Mal/Bckdr-C, Mal/Inject-M [Sophos] Backdoor:Win32/Agent [Microsoft] Virus.Win32.Injector [Ikarus] Win32/IRCBot.worm.variant [AhnLab]

• Notes:
• %AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
• %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).

• The following directory was created:
• %System%\Bifrost

Memory Modifications

• There was a new memory page created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes

• Notes:
• %ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4D
• HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost
• HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\msvideo
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\msvideo
• HKEY_CURRENT_USER\Software\Bifrost

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4D]
• stubpath = "%System%\Bifrost\server.exe s"

so that server.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nck = ED 1B E6 27 B9 28 D6 32 74 C3 CD 74 FA 93 5B 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 01
• plg1 = EA 44 DC 02 A3 27 D7 5F 11 AD B9 07 DA F2 35 03 2A 35 8E 58 1B 0E 11 94 D4 F9 28 1F 11 4D 98 BC D2 64 44 8E CD F9 B9 BA 23 BD 45 ED 15 A6 77 AF B8 7C 04 4D 90 91 58 5F 81 61 19 72 00 4E 53 6A E0 AB E6 8B 10 39 00 56 BC 15 2D 84 21 B5 3B F6 6D 2C 34 6