ThreatExpert Report: Trojan.Win32.Patched.ka, Generic Dropper.pm.gen, Mal/EncPk-UJ..

Visit ThreatExpert web site

Close Report

Submission Summary:

Submission details:

Submission received: 28 August 2012, 16:59:59
Processing time: 8 min 22 sec
Submitted sample:

File MD5: 0x2DE7603114F2F6AF8DAB305DC3A32060
File SHA-1: 0x5728E47E3239853AFE46C8164DE4085AF15162A9
Filesize: 1,553,408 bytes
Alias:

Trojan.Win32.Patched.ka [Kaspersky Lab]
Generic Dropper.pm.gen [McAfee]
Mal/EncPk-UJ [Sophos]
Constructor:Win32/Bifrose.A [Microsoft]
Constructor.Win32.Bifrose [Ikarus]

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\addons.dat	24,923 bytes	MD5: 0x930858FDAE362EA451339F9B5468AEBE SHA-1: 0x5C128E27C04A258C58F301AA7671085A91AAC75E	(not available)
2	%AppData%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch	724 bytes	MD5: 0xAC16C4F9F4C72D9635BF40D9606F5E0E SHA-1: 0xAFA2309AA4108633C4126B7D46D167F6E01428E7	(not available)
3	%Temp%\1.tmp %System%\Bifrost\server.exe	83,676 bytes	MD5: 0xCD3718120E701CF1219636DC8A07E5CA SHA-1: 0x75250DE78125FD2AEA7A1DF2A58996F479311B66	Trojan-Dropper.Win32.Injector [Ikarus]
4	%Windir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch %Windir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch	1,066 bytes	MD5: 0xEC1DB3DAA172F8D247AD21652AE74D04 SHA-1: 0xB502D239C51DAB1CBEF9849B9A05810E38BA3C27	(not available)
5	%System%\Bifrost\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
6	[file and pathname of the sample #1]	1,553,408 bytes	MD5: 0x2DE7603114F2F6AF8DAB305DC3A32060 SHA-1: 0x5728E47E3239853AFE46C8164DE4085AF15162A9	Trojan.Win32.Patched.ka [Kaspersky Lab] Generic Dropper.pm.gen [McAfee] Mal/EncPk-UJ [Sophos] Constructor:Win32/Bifrose.A [Microsoft] Constructor.Win32.Bifrose [Ikarus]

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.
%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).
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

The following directories were created:

%AppData%\Microsoft\CLR Security Config
%AppData%\Microsoft\CLR Security Config\v2.0.50727.42
%System%\Bifrost
%System%\Computers

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	1,578,496 bytes
server.exe	%System%\Bifrost\server.exe	33,696 bytes
1.tmp	%Temp%\1.tmp	33,696 bytes

Attention! The following processes were intentionally hidden from the user:

Process Name	Main Module Size
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-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
HKEY_CURRENT_USER\Software\BIFROST1.2

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4DB90836}]

stubpath = "%System%\Bifrost\server.exe s"

so that server.exe runs every time Windows starts

[HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]

nck = CA 11 E4 23 CC 44 A2 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 7A E1 AB E6 8B 30 CA 34 56 F9 AD AD F8 4D 41 0F F6 9F 90 A2 1

[HKEY_CURRENT_USER\Software\BIFROST1.2]

settings = 51 00 00 00 00 00 00 00 00 00 00 00 6D 79 70 61 73 73 00 00 00 00 00 00 00 00 00 00 61 64 64 6F 6E 73 2E 64 61 74 00 00 00 00 00 00 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00

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 objects were created:

Bif1234
BIFROST1.2

The following port was open in the system:

Port	Protocol	Process
81	TCP	[file and pathname of the sample #1]

The following Host Name was requested from a host database:

zaki2000.no-ip.info

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

Remote Host	Port Number
zaki2000.no-ip.info	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

Notes:

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

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 81:

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.