Trojan-PSW.Win32.Zbot_bfe78ae4cb

by malwarelabrobot on July 30th, 2013 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Win32.Zeus!IK (Emsisoft), Trojan-PSW.Win32.Zbot.6.FD, GenericInjector.YR, TrojanPSWZbot.YR, BackdoorCaphaw_QKKBAL.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, Trojan, Backdoor


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: bfe78ae4cb5292368159ec408d9f73f7
SHA1: 00a32ac268545b0dd2d23ef35fa3ba645e72faee
SHA256: e94bf9c94d51964aa7079165cbd96d268c4063ef5f9ad9c8467f524350c92a0e
SSDeep: 24576:7LSGXC8aczAnE44g6eQoKmwOzWEPW gLylB/jf WBisbYg:HSV8lAJdWmfpPWZyPbGW6g
Size: 1179451 bytes
File type: PE32
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-07-25 03:55:44


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):

bfe78ae4cb5292368159ec408d9f73f7.exe:1964
azqet.exe:3016

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

ctfmon.exe:252

File activity

The process bfe78ae4cb5292368159ec408d9f73f7.exe:1964 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Yqos\azqet.exe (7386 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmpd5cb3f20.bat (177 bytes)

Registry activity

The process bfe78ae4cb5292368159ec408d9f73f7.exe:1964 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" = "CB 3A 08 D9 A5 34 35 0C B3 F9 9D 47 18 DD 6F ED"

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

The process azqet.exe:3016 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" = "51 F1 0A 96 7E D0 05 28 B9 55 DA 17 FC 1F 78 1D"

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

The process ctfmon.exe:252 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\Fyipsy]
"Buhuocon" = "AA B1 BB 8B 70 40 C6 88 E8 C0 44 7C 95 62 71 EC"

The Trojan-PSW deletes the following value(s) in system registry:
The Trojan-PSW disables automatic startup of the application by deleting the following autorun value:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"internat.exe"

Network activity (URLs)

URL IP
hxxp://199.79.62.19/williams/config.bin


Rootkit activity

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

HttpSendRequestExW
HttpSendRequestExA
InternetReadFileExA
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
InternetCloseHandle
HttpQueryInfoA
InternetReadFile

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):

    bfe78ae4cb5292368159ec408d9f73f7.exe:1964
    azqet.exe:3016

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

    %Documents and Settings%\%current user%\Application Data\Yqos\azqet.exe (7386 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\tmpd5cb3f20.bat (177 bytes)

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

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