ThreatExpert Report: Trojan-PSW.Generic, Backdoor.Win32.Bifrose.fny, Infostealer, BKDR

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Submission Summary:

Submission details:

Submission received: 7 November 2009, 15:43:32
Processing time: 10 min 11 sec
Submitted sample:

File MD5: 0x885DFA3D8C074BFAA07F6640A4F66F8C
File SHA-1: 0x1DDB68022D7C8B5DCC430BFE61D7FA47E71DB676
Filesize: 51,648 bytes
Alias:

Trojan-PSW.Generic [PCTools]
Infostealer [Symantec]
Backdoor.Win32.Bifrose.fny [Kaspersky Lab]
BKDR_BIFROSE.MIC [Trend Micro]
Mal/Bifrose-R, Mal/Bifrose-E [Sophos]
Backdoor:Win32/Bifrose.ACI [Microsoft]
Backdoor.Bifrost [Ikarus]
Dropper/Agent.29565 [AhnLab]

Summary of the findings:

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

Technical Details:

Possible Security Risk

Attention! Characteristics of the following security risks were 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.
Backdoor.Optix	Backdoor.Optix is a backdoor Trojan program which opens ports on the infected computer and allows the attackers to gain unauthorized access to the system.

Attention! The following threat categories were identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system
	A keylogger program that can capture all user keystrokes (including confidential details such username, password, credit card number, etc.)

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\addon.dat	22,040 bytes	MD5: 0xCA432AA09E02B310D1D0A245A78F652C SHA-1: 0x3E3D9AD4E0088CABE91065826DE6811ADD9803DF	(not available)
2	%ProgramFiles%\Bifrost\klog.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
3	%ProgramFiles%\Bifrost\sssssssssssssss [file and pathname of the sample #1]	51,648 bytes	MD5: 0x885DFA3D8C074BFAA07F6640A4F66F8C SHA-1: 0x1DDB68022D7C8B5DCC430BFE61D7FA47E71DB676	Trojan-PSW.Generic [PCTools] Infostealer [Symantec] Backdoor.Win32.Bifrose.fny [Kaspersky Lab] BKDR_BIFROSE.MIC [Trend Micro] Mal/Bifrose-R, Mal/Bifrose-E [Sophos] Backdoor:Win32/Bifrose.ACI [Microsoft] Backdoor.Bifrost [Ikarus] Dropper/Agent.29565 [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.
%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

The following directory was created:

%ProgramFiles%\Bifrost

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
sssssssssssssss	%ProgramFiles%\Bifrost\sssssssssssssss	36,864 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	36,864 bytes

There were new memory pages 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
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes
IEXPLORE.EXE	%ProgramFiles%\internet explorer\iexplore.exe	344,064 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9B71D88C-C598-4935-C5D1-43AA4DB90836}
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\{9B71D88C-C598-4935-C5D1-43AA4DB90836}]

stubpath = "%ProgramFiles%\Bifrost\sssssssssssssss s"

so that sssssssssssssss 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 3C 53 77 15 3A 79 25 E0 AB CC D4 68 38 26 56 BD 15 2D 84 F1 41 0F F6 29 B1 A1 1

Other details

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

Sweden

To mark the presence in the system, the following Mutex object was created:

Bif123

The following Host Name was requested from a host database:

asdzxc.no-ip.biz

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

Remote Host	Port Number
asdzxc.no-ip.biz	81

There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:

%ProgramFiles%\Internet Explorer\iexplore.exe

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 81:

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