Trojan-Spy.Win32.WMPatch

File – DBOLE.EXE
This file is compressed with the PE-Pack utility. It’s compressed size is 32,768 bytes and is written in the C programming language. Once the trojan is launched it checks for the presence of the WebMoney program. To do this it looks for the file WMClient.dll in the programs folder and inserts into it new code. The new code creates two files:

c:wmkey.bin
c:wmmem.bin

The program creates a report file under the name:

c:wmlog.bin

Next the Trojan installs itself into the Windows registry auto-run key.

The following strings are contained within the file:

kernel32.dll rock the block c:wmkey.bin c:wmmem.bin 
CreateFileA WriteFile CloseHandle lstrlen CopyFileA 
DatabaseOLE false SoftwareMicrosoftWindowsCurrentVersionRun 
Command line: '%s' - Memory allocation failed + Shutting down
- Bad file version - File writing error + File written + Prepare to patch  
+ Entry point at %d (%x) + Patch at %d (%x) + Reading ok, %d bytes read - Error reading file
+ Memory allocation ok  File size: %d bytes + Open file ok - WM not installed 
- Error opening file Patching: %s 
+ Get path ok %s + Starting  WMClient.dll SoftwareWebmoneyPath %s
c:wmlog.bin

File – SICKBOY.EXE
This file is compressed with the PE-Pack utility, It’s compressed size is 28,672 bytes and is written in the C programming language. Upon being launched, this file stays in a victim computer’s memory and sends out the following files via email:

 "c:wmlog.bin", "c:wmmem.bin", "c:wmkey.bin" 

They are sent to the address:

sickboy@centrum.cz

So this program can connect itself to the SMTP server and to form email text it converts binary files into text format.

The file conatains the following strings:

xfm1.txt RegisterServiceProcess kernel32.dll 
c:wmkey.bin c:wmmem.bin c:wmlog.bin WebMoney Keeper QUIT
Subject: %s
DATA
RCPT TO: 
MAIL FROM: 
HELO localhost
62.84.131.172 SOFTWAREWebmoneyOptions file not found Filename plain text: %s
%.2x Filename bin: %s