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Trojan.NSIS.StartPage_5004c2493c


not-a-virus:Downloader.Win32.Lickone.mh (Kaspersky), CoolMirage Ltd (fs) (VIPRE), Adware.Yontoo.4 (DrWeb), Trojan.NSIS.StartPage.FD, TrojanNSISStartPage.YR (Lavasoft MAS)Behaviour: Trojan, Adware

The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary

MD5: 5004c2493cdaf66e1a5b21ef5ea9c86e

SHA1: a158cdaa91b543f302e9969ac7f49f82a26b21ca

SHA256: 95177a6c3c71f310a69d59ae24d9d3f26966e53011ebd332ab59aa64e65e0b0f

SSDeep: 12288:m3svdyDeA AB /jPLLd0m xkHsGXS53e2PHCS/KfG:asIDgAB rPPdkxA1XG3e1SB

Size: 538456 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: UPolyXv05_v6

Company: no certificate found

Created at: 2009-12-06 00:50:46

Analyzed on: WindowsXP SP3 32-bit

Summary: Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):No processes have been created.The Trojan injects its code into the following process(es):

%original file name%.exe:1980

File activity

The process %original file name%.exe:1980 makes changes in the file system.


The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\System.dll (11264 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\load_3.bmp (614 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\locate.dll (19456 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\dAg (167 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\back_dis.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\inetc3.dll (35840 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\decline.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\X7VALIDZ\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\skip.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\gCD (6 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept2.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept3.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\trninj.txt (1 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\NSISdl.dll (14848 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\side.bmp (109464 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\nsDialogs.dll (9728 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\1clogo.bmp (146456 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept0.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\UAC.dll (13824 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\complist.txt (125 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept_disabled.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\close.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept1.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf3.tmp (1943196 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept.bmp (16640 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\back.bmp (16636 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\X7VALIDZ\country[1].htm (6 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\nsa2.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\-1 (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp (0 bytes)

Registry activity

The process %original file name%.exe:1980 makes changes in the system registry.


The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"

[HKCR\AppID\{C007DADD-132A-624C-088E-59EE6CF0711F}]
"id0" = "27012014"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 2F 00 00 00 01 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\1ClickDownload]
"LastInstall0" = "30350079"
"LastInstall3" = "30350079"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Рабочий стол"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"

[HKCU\Software\1ClickDownload]
"UID" = "188689060"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "DF F4 A6 7A 84 BA DD 01 EB CE CD 10 EE 6F 1A 6F"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Рабочий стол"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

The Trojan modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

"ProxyBypass" = "1"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The Trojan deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

Network activity (URLs)

URL IP
hxxp://torrntvz.com/data.php?p=hdvidcodec54.247.67.39
hxxp://torrntvz.com/ping.php?partner=ontv--err&product=hdvidcodec&build=18_4
hxxp://data.torntv.net/country.asp?st=-1&uid=188689060&tuid=3061758&sref=ONT_18-4_ontv--err&vmdt=|vm|pm|&bld=18J&cnt=ua176.34.177.58
torntvz.net54.247.67.39


HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.

Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):No processes have been created.
  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\System.dll (11264 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\load_3.bmp (614 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\locate.dll (19456 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\dAg (167 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\back_dis.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\inetc3.dll (35840 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\decline.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\X7VALIDZ\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\skip.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\gCD (6 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept2.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept3.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\trninj.txt (1 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\NSISdl.dll (14848 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\side.bmp (109464 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\nsDialogs.dll (9728 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\1clogo.bmp (146456 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept0.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\UAC.dll (13824 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\complist.txt (125 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept_disabled.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\close.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept1.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf3.tmp (1943196 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\accept.bmp (16640 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\nsf4.tmp\back.bmp (16636 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\X7VALIDZ\country[1].htm (6 bytes)

  4. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  5. Reboot the computer.
*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

Network Activity

Map

Strings from Dumps