Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] ' rdfnpgyq' = '"<LS_APPDATA>\piril\piril.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] ' rdfnpgyq' = '"<LS_APPDATA>\piril\piril.exe"'
Malicious functions:
Creates and executes the following:
- '%TEMP%\WindowsXP-KB968930-x86-ENG.exe' /quiet /norestart
- '' (downloaded from the Internet)
Executes the following:
- '<SYSTEM32>\regsvr32.exe'
- '<SYSTEM32>\svchost.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>\piril\piril.exe
- %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\microsoft[1]
Deletes the following files:
- <SYSTEM32>\svchost.exe
Network activity:
Connects to:
- '21#.#03.94.49':80
- '77.##4.233.136':443
- '14#.#6.157.79':80
- '23#.#16.110.61':8080
- '88.##1.138.41':80
- '21.##9.117.65':80
- '14#.#99.52.164':80
- '19#.#07.50.47':80
- '48.##2.127.79':80
- '84.##.174.27':80
- '72.##.89.156':80
- '14#.#.189.187':80
- '15#.#01.234.251':80
- '21#.#5.149.253':80
- '13#.#01.83.31':8080
- '25#.#9.112.116':80
- '20#.#44.166.79':443
- '85.#0.85.57':80
- '56.#.187.128':80
- '14#.#7.233.9':80
- '19#.#3.120.90':80
- '97.##4.106.194':80
- '15.##.252.247':80
- '11#.#12.72.219':80
- '43.##6.15.133':80
- '20#.#6.232.182':80
- '16#.#33.116.158':80
- '82.##.131.25':443
- '14#.#8.20.69':80
- '21#.#59.94.27':80
- '72.##5.90.151':80
- '12#.70.52.1':443
- '17#.#6.244.181':80
- '17#.#53.179.23':80
- '28.##.198.171':80
- '14#.#3.234.195':80
- '14#.#7.121.33':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
