Trojan-PSW.Win32.MSNPassword_2e5d9e6efa

by malwarelabrobot on July 9th, 2013 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Generic.pak!cobra (VIPRE), Trojan-Dropper.Win32.Dunik!IK (Emsisoft), Trojan-PSW.Win32.MSNPassword.FD, Trojan.Win32.FlyStudio.FD, GenericInjector.YR, GenericEmailWorm.YR (Lavasoft MAS)
Behaviour: Trojan-Dropper, Trojan-PSW, Trojan, Worm, Email-Worm


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

Summary
Technical Details
Removal Recommendations

MD5: 2e5d9e6efaecf7ec39a9bdb80168a28b
SHA1: 7a5b0a174303e0337041acf27ae535d7ae52c3cc
SHA256: d49a50fe9631bdc1f18e566c1bc155f9580f722c262bfddf9eb936d1228ed9fd
SSDeep: 12288:41c//////jwTJMMMvMMMCl4dn2xQn6phLdlPJqS6wan4XNMW4smfWRNrg9 kQfxl:cc//////ETJMMMvMMMJ2m6pNdlV3SsLL
Size: 570880 bytes
File type: PE32
Platform: WIN32
Entropy: Packed
PEID: BorlandDelphiv60v70_v2; BorlandDelphiv30; BorlandDelphiv50KOL; BorlandDelphi30; UPolyXv05_v6
Company: no certificate found
Created at: 1992-06-20 01:22:17


Summary:

Trojan-Dropper. Trojan program, intended for stealth installation of other malware into user's system.
Trojan-PSW. Trojan program intended for stealing users passwords.
Email-Worm. Worm that spreads its copies in attachments included in emails.

Process activity

The Trojan-PSW creates the following process(es):

2e5d9e6efaecf7ec39a9bdb80168a28b.exe:1820
KartSvr.exe:964

The Trojan-PSW injects its code into the following process(es):

2e5d9e6efaecf7ec39a9bdb80168a28b.exe:940
2e5d9e6efaecf7ec39a9bdb80168a28b.exe:1576

File activity

The process 2e5d9e6efaecf7ec39a9bdb80168a28b.exe:1576 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%System%\KartSvr.exe (24 bytes)
%System%\karnel32.dll (65 bytes)

Registry activity

The process 2e5d9e6efaecf7ec39a9bdb80168a28b.exe:940 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "6C 60 14 44 D6 B0 14 2B 80 2C CA F6 E5 B5 B7 D2"

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

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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

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

[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" = "65452"

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

[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\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

The process 2e5d9e6efaecf7ec39a9bdb80168a28b.exe:1576 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "91 AC DE 3A AA FA 76 CF 6B 95 08 BB C1 2A 1C E8"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"KartSvr.exe" = "KartSvr Microsoft 基础类应用程序"

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

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

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

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

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

To automatically run itself each time Windows is booted, the Trojan-PSW adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"KartSvr" = "%System%\KartSvr.exe"

The process KartSvr.exe:964 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B6 AC F7 0C 6E 8D 07 E5 BC F7 D4 01 4C 52 BE A3"

Network activity (URLs)

No activity has been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Worm that spreads its copies in attachments included in emails.


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):

    2e5d9e6efaecf7ec39a9bdb80168a28b.exe:1820
    KartSvr.exe:964

  2. Delete the original Trojan-PSW file.
  3. Delete or disinfect the following files created/modified by the Trojan-PSW:

    %System%\KartSvr.exe (24 bytes)
    %System%\karnel32.dll (65 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "KartSvr" = "%System%\KartSvr.exe"

  5. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

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