Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] ' krcdh' = '"<LS_APPDATA>\ybol\ybol.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] ' krcdh' = '"<LS_APPDATA>\ybol\ybol.exe"'
Malicious functions:
Creates and executes the following:
- '%TEMP%\WindowsXP-KB968930-x86-ENG.exe' /quiet /norestart
- '<Full path to file>'
- '' (downloaded from the Internet)
Executes the following:
- '<SYSTEM32>\regsvr32.exe'
Injects code into
the following system processes:
- <SYSTEM32>\regsvr32.exe
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1206' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '2300' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1809' = '00000003'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1206' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '2300' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1809' = '00000003'
Modifies file system:
Creates the following files:
- %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\WindowsXP-KB968930-x86-ENG[1].exe
- %TEMP%\WindowsXP-KB968930-x86-ENG.exe
- <LS_APPDATA>\ybol\ybol.exe
- %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\microsoft[1]
Deletes the following files:
- <Full path to file>
Network activity:
Connects to:
- '23#.#8.115.230':443
- '23#.#48.244.2':80
- '17#.#8.162.109':80
- '69.##3.182.186':80
- '12#.#91.102.102':80
- '48.##8.134.51':80
- '21#.#58.195.43':443
- '14#.#2.98.35':80
- '11#.#50.229.169':80
- '53.##8.229.159':80
- '14#.#06.199.163':80
- '22#.#33.220.94':80
- '58.##.192.173':80
- '72.##.179.249':80
- '21#.#17.185.5':80
- '83.##9.35.157':80
- '22#.#8.23.111':80
- '83.##7.215.21':80
- '15#.#79.31.153':80
- '23#.#78.164.252':80
- '15#.#29.23.115':80
- '93.##9.191.138':80
- '20#.#6.232.182':80
- '13#.#07.48.152':80
- '15#.#12.233.196':80
- '11#.#6.150.58':8080
- '11#.#3.76.203':80
- '10#.#59.67.53':80
- '19#.#46.111.53':80
- '43.##3.194.20':443
- '58.##.117.136':80
- '51.##6.129.6':80
TCP:
HTTP GET requests:
- http://download.microsoft.com/download/E/C/E/ECE99583-2003-455D-B681-68DB610B44A4/WindowsXP-KB968930-x86-ENG.exe via 20#.#6.232.182
- http://microsoft.com/ via 20#.#6.232.182
UDP:
- DNS ASK download.microsoft.com
- DNS ASK microsoft.com
