Shiz_b8d3316b1e

Dynamic Analysis

Process activity

The Backdoor creates the following process(es):

b8d3316b1e714f81cf848ccc455705bf.exe:2592

The Backdoor injects its code into the following process(es):

ctfmon.exe:252

File activity

The process b8d3316b1e714f81cf848ccc455705bf.exe:2592 makes changes in a file system.

The Backdoor creates and/or writes to the following file(s):

%WinDir%\AppPatch\xynodu.exe (1771 bytes)
%System%\config\software (3028 bytes)
%System%\config\software.LOG (5300 bytes)

The Backdoor deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\1.tmp (0 bytes)

Registry activity

The process b8d3316b1e714f81cf848ccc455705bf.exe:2592 makes changes in a system registry.

The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "83 DA CA B3 FE 27 65 DA BF C3 EA 29 68 75 51 4E"

[HKLM\System\CurrentControlSet\Control\Session Manager]
"PendingFileRenameOperations" = "\??\%WinDir%\apppatch\xynodu.exe_, \??\%WinDir%\apppatch\xynodu.exe"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"d8cc41db" = "CêkæÚ`åD 5õÔPôPW«m&e4¹à”¸a4d‚\yìqA}(Äé¼ü4|Âá@”°™,¡¤üHrѼ©€©”´D0}éiXª¸|Èy4¡RYÑúièmÑ©È„IáØð±¼(¤ ádIÚبìd˜ XYâÀeœiü¥AšIi¸r¥(¡A\y 9€éñ$ZÔaxÙ9The process ctfmon.exe:252 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

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

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

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

Network activity (URLs)

URL: hxxp://50.116.56.144/login.php Country: United States

Rootkit activity

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

CertVerifyCertificateChainPolicy

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

HttpSendRequestExW
HttpSendRequestExA
InternetReadFileExA
InternetReadFileExW
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
InternetCloseHandle
InternetReadFile

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

GetWindowTextA
GetClipboardData
SendInput
GetMessageA
GetMessageW
TranslateMessage

The Backdoor installs the following user-mode hooks in ADVAPI32.dll:

CryptEncrypt

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

WSASend
recv
gethostbyname
WSARecv
send

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

CreateFileW

Propagation

Removals

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):

   b8d3316b1e714f81cf848ccc455705bf.exe:2592
   

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

   %WinDir%\AppPatch\xynodu.exe (1771 bytes)
   %System%\config\software (3028 bytes)
   %System%\config\software.LOG (5300 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.

Static Analysis

Network Activity

Map

Strings from Dumps