Trojan-PSW.Win32.Zbot_ea6c62d540

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

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Zbot.aauf (v) (VIPRE), Trojan.Win32.Injector!A2 (Emsisoft), Trojan-PSW.Win32.Zbot.6.FD, GenericInjector.YR, BackdoorCaphaw_QKKBAL.YR, TrojanPSWZbot.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: ea6c62d540d6870a64a0881a2f7b1f43
SHA1: 3af3f0f403d472cb0f53258fbbdc07e31fde0478
SHA256: f8372d7f740ed268036092adea4ca33353a6ce968f05f8ebc3103c961a97e0fa
SSDeep: 3072:wDYnilgKz3kHD6zBT5TqpZKX DKhN4fEeZGm/yg87hIMDCx7v5zKS2OVHxIh5PQc:wDScgKz0HDgXOr/uHlmd6Lvtf
Size: 289468 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: QuickSet
Created at: 2013-11-27 22:51:19


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):

ynzu.exe:2944
%original file name%.exe:2780

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

ctfmon.exe:252

File activity

The process %original file name%.exe:2780 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\tmp823af81a.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Qexyce\ynzu.exe (289 bytes)

Registry activity

The process ynzu.exe:2944 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" = "DE 54 5F 61 5F C1 B8 C3 AB F9 37 65 6D B5 91 17"

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

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

[HKCU\Software\Microsoft\Efhi]
"Ukiq" = "E1 F7 4B 18 3A 7B C7 EC 21 C3 71 EF 5F 1E 88 2F"

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"

The process %original file name%.exe:2780 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" = "52 F1 57 33 9A 27 30 FE 90 A1 3D 8D C7 6D EB E1"

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

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

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):

    ynzu.exe:2944
    %original file name%.exe:2780

  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%\Local Settings\Temp\tmp823af81a.bat (177 bytes)
    %Documents and Settings%\%current user%\Application Data\Qexyce\ynzu.exe (289 bytes)

  5. Reboot the computer.

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