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Analysis Report for zus.exe

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Summary:

Description Risk
Autostart capabilities: This executable registers processes to be executed at system start. This could result in unwanted actions to be performed automatically. medium
Creates files in the Windows system directory: Malware often keeps copies of itself in the Windows directory to stay undetected by users. medium
Performs File Modification and Destruction: The executable modifies and destructs files which are not temporary. high
Performs Registry Activities: The executable reads and modifies registry values. It may also create and monitor registry keys. low


Table of Contents

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1. General Information

  - Information about Anubis' invocation  
Time needed: 241 s 
Report created: 08/08/09, 12:29:28 UTC 
Termination reason: Timeout 
Program version: 1.70.0 

2. zus.exe

  - General information about this executable  
Analysis Reason: Primary Analysis Subject 
Filename: zus.exe 
MD5: 01aed193ac87eed6ce40e7cb7d35b36e 
SHA-1: 02a3a2331fdede6e0648cdbfe0b49f2bc9a11b01 
File Size: 49664 Bytes
Command Line: "C:\zus.exe"  
Process-status at analysis end: alive 
Exit Code:

  - Load-time Dlls  
Module Name Base Address Size
C:\​WINDOWS\​system32\​ntdll.dll  0x7C900000  0x000AF000 
C:\​WINDOWS\​system32\​kernel32.dll  0x7C800000  0x000F6000 
C:\​WINDOWS\​system32\​advapi32.dll  0x77DD0000  0x0009B000 
C:\​WINDOWS\​system32\​RPCRT4.dll  0x77E70000  0x00092000 
C:\​WINDOWS\​system32\​Secur32.dll  0x77FE0000  0x00011000 
C:\​WINDOWS\​system32\​shlwapi.dll  0x77F60000  0x00076000 
C:\​WINDOWS\​system32\​GDI32.dll  0x77F10000  0x00049000 
C:\​WINDOWS\​system32\​USER32.dll  0x7E410000  0x00091000 
C:\​WINDOWS\​system32\​msvcrt.dll  0x77C10000  0x00058000 

  - Run-time Dlls  
Module Name Base Address Size
C:\​WINDOWS\​system32\​comctl32.dll  0x5D090000  0x0009A000 
C:\​WINDOWS\​system32\​psapi.dll  0x76BF0000  0x0000B000 
C:\​WINDOWS\​WinSxS\​x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\​comctl32.dll  0x773D0000  0x00103000 
C:\​WINDOWS\​system32\​ole32.dll  0x774E0000  0x0013D000 
C:\​WINDOWS\​system32\​shell32.dll  0x7C9C0000  0x00817000 

  - Ikarus Virus Scanner  
Trojan-Spy.Win32.Zbot.cmr (Sig-Id:360487)

2.a) zus.exe - Registry Activities

  - Registry Values Modified:  
Key Name New Value
HKLM\​software\​microsoft\​windows nt\​currentversion\​winlogon  info userinit  C:\​WINDOWS\​system32\​userinit.exe,C:\​WINDOWS\​system32\​ntos.exe, 

  - Registry Values Read:  
Key Name Value Times
HKLM\​SYSTEM\​CurrentControlSet\​Control\​Session Manager  CriticalSectionTimeout  2592000 
HKLM\​SYSTEM\​Setup  SystemSetupInProgress 
HKLM\​Software\​Policies\​Microsoft\​Windows\​Safer\​CodeIdentifiers  TransparentEnabled 
HKLM\​System\​CurrentControlSet\​Control\​ComputerName\​ActiveComputerName  ComputerName  PC 
HKLM\​software\​microsoft\​windows nt\​currentversion\​winlogon  userinit  C:\​WINDOWS\​system32\​userinit.exe, 

2.b) zus.exe - File Activities

  - Files Created:  
C:\WINDOWS\system32\ntos.exe

  - Files Read:  
PIPE\lsarpc

  - Files Modified:  
C:\WINDOWS\system32\ntos.exeinfo
PIPE\lsarpcinfo

  - File System Control Communication:  
File Control Code Times
PIPE\lsarpc  0x0011C017 

  - Device Control Communication:  
File Control Code Times
\Device\KsecDD  0x00390008 

  - Memory Mapped Files:  
File Name
C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\comctl32.dll
C:\WINDOWS\WindowsShell.Manifest
C:\WINDOWS\system32\comctl32.dll
C:\WINDOWS\system32\psapi.dll
C:\WINDOWS\system32\shell32.dll
C:\zus.exe


International Secure Systems Lab
Vienna University of Technology, Eurecom France, UC Santa Barbara
Contact: anubis@iseclab.org