MD5: 7e66da3e97d23ebaafe9c8d41874e910
SHA1: 5919a3ba633708a3d53a419ae5f38e2e541938c5
SHA256: dc85ae77635c8bc2a1596cafc2a0b0aec6b98aa14654f9d6af2220e4a732fe7b
SSDeep: 3072:uYX2p2uwDqcwwgGTTcVI/CfMBf qXGgTGmyXWXK9yKZ/HeYVMDRM:ip2WPAHRCfOfVXGgTGmnaZ/ 8
Size: 223232 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2014-02-01 15:39:00
Analyzed on: WindowsXP SP3 32-bit

Summary:

Trojan-PSW. Trojan program intended for stealing users passwords.

Payload

No specific payload has been found.

Process activity

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

yxcy.exe:188
yxcy.exe:1072
%original file name%.exe:1328
%original file name%.exe:1804

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

File activity

The process yxcy.exe:188 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%System%\drivers\etc\hosts (421 bytes)

The process %original file name%.exe:1328 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\tmpd31aa59f.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Fekeg\yxcy.exe (223 bytes)

The process %original file name%.exe:1804 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%System%\drivers\etc\hosts (421 bytes)

Registry activity

The process yxcy.exe:188 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "39 A3 8A 0A 33 53 D4 4A 74 4F D5 07 CC 0D BD FF"

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

The process yxcy.exe:1072 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "02 FD 09 0E B1 5A CD 4A FD B9 23 78 9D E0 0E FB"

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

The process %original file name%.exe:1328 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "17 DA 6C 1C D7 2F C7 90 52 D6 4B 1D 01 ED 46 4D"

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

The process %original file name%.exe:1804 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "20 E5 E7 1F FB 60 DD 82 31 07 55 02 F9 D9 3F C6"

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

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

The Trojan-PSW modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses.
The modified file is 421 bytes in size. The following strings are added to the hosts file listed below:

Rootkit activity

The Trojan-PSW installs the following user-mode hooks in WININET.dll:

HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetQueryDataAvailable
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle

The Trojan-PSW installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan-PSW installs the following user-mode hooks in USER32.dll:

SetCursorPos
DefMDIChildProcA
DefFrameProcA
DefDlgProcA
GetClipboardData
DefMDIChildProcW
DefFrameProcW
GetUpdateRgn
RegisterClassA
GetDCEx
ReleaseCapture
SetCapture
DefWindowProcA
CallWindowProcA
GetUpdateRect
PeekMessageA
CallWindowProcW
GetMessagePos
GetCursorPos
EndPaint
BeginPaint
DefWindowProcW
RegisterClassExA
GetMessageA
DefDlgProcW
SwitchDesktop
OpenInputDesktop
RegisterClassExW
RegisterClassW
GetCapture
PeekMessageW
GetMessageW
GetWindowDC
TranslateMessage
GetDC
ReleaseDC

The Trojan-PSW installs the following user-mode hooks in WS2_32.dll:

WSASend
send
closesocket

The Trojan-PSW installs the following user-mode hooks in kernel32.dll:

GetFileAttributesExW

The Trojan-PSW installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtCreateThread

Propagation

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. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):
   

   yxcy.exe:188
   yxcy.exe:1072
   %original file name%.exe:1328
   %original file name%.exe:1804

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

   %System%\drivers\etc\hosts (421 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\tmpd31aa59f.bat (177 bytes)
   %Documents and Settings%\%current user%\Application Data\Fekeg\yxcy.exe (223 bytes)
   

5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts):
   127.0.0.1 localhost
   
6. Reboot the computer.
   

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