Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Management Studio Offline Computer' = '<SYSTEM32>\hhfzfobdwmi.exe'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\Provider Socket Encrypting Presentation] 'Start' = '00000002'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- Windows Security Center
Creates and executes the following:
- '<SYSTEM32>\yohtwkl.exe' "<SYSTEM32>\hhfzfobdwmi.exe"
- '%WINDIR%\Temp\l4yzl9g4fdbj0myhrh.exe' -r 47546 tcp
- '%TEMP%\l4yzl9gakkbpomyhrhvkyfypik.exe'
- '<SYSTEM32>\hhfzfobdwmi.exe'
Modifies file system :
Creates the following files:
- <SYSTEM32>\klhoguhpj\run
- <SYSTEM32>\klhoguhpj\rng
- %WINDIR%\Temp\l4yzl9g4fdbj0myhrh.exe
- <SYSTEM32>\klhoguhpj\cfg
- %TEMP%\l4yzl9gakkbpomyhrhvkyfypik.exe
- <SYSTEM32>\klhoguhpj\tst
- <SYSTEM32>\yohtwkl.exe
- <SYSTEM32>\hhfzfobdwmi.exe
Sets the 'hidden' attribute to the following files:
- <SYSTEM32>\yohtwkl.exe
- <SYSTEM32>\hhfzfobdwmi.exe
Deletes the following files:
- %WINDIR%\Temp\l4yzl9g4fdbj0myhrh.exe
- %TEMP%\l4yzl9gakkbpomyhrhvkyfypik.exe
Network activity:
Connects to:
- 'ar###free.net':80
- 'th###nce.net':80
- 'ar###forty.net':80
- 'so###free.net':80
- 'dr###once.net':80
- 'th###tudy.net':80
- 'dr###study.net':80
- 'th###oss.net':80
- 'dr###loss.net':80
- 'so###forty.net':80
- 'up###orty.net':80
- 'wh###free.net':80
- 'up###ther.net':80
- 'wh###forty.net':80
- 'up###ree.net':80
- 'so###other.net':80
- 'ar###other.net':80
- 'so###wall.net':80
- 'ar###wall.net':80
- 'ch####nother.net':80
- 'mo####gduring.net':80
- 'of####urprise.net':80
- 'gw#####ynhuddleston.net':80
- 'si######edwerryhouse.net':80
- 'jo####ymeasure.net':80
- 'or###thrown.net':80
- 'se####strong.net':80
- 'de####promise.net':80
- 'ri###nstorm.net':80
- 'fa###nce.net':80
- 'wa###once.net':80
- 'th###ncle.net':80
- 'dr###uncle.net':80
- 'fa###oss.net':80
- 'th###while.net':80
- 'ef###tbuilt.net':80
- 'wa###loss.net':80
- 'fa###tudy.net':80
TCP:
HTTP GET requests:
- http://ar###free.net/index.php
- http://th###nce.net/index.php
- http://ar###forty.net/index.php
- http://so###free.net/index.php
- http://dr###once.net/index.php
- http://th###tudy.net/index.php
- http://dr###study.net/index.php
- http://th###oss.net/index.php
- http://dr###loss.net/index.php
- http://so###forty.net/index.php
- http://up###orty.net/index.php
- http://wh###free.net/index.php
- http://up###ther.net/index.php
- http://wh###forty.net/index.php
- http://up###ree.net/index.php
- http://so###other.net/index.php
- http://ar###other.net/index.php
- http://so###wall.net/index.php
- http://ar###wall.net/index.php
- http://ch####nother.net/index.php
- http://mo####gduring.net/index.php
- http://of####urprise.net/index.php
- http://gw#####ynhuddleston.net/index.php
- http://si######edwerryhouse.net/index.php
- http://jo####ymeasure.net/index.php
- http://or###thrown.net/index.php
- http://se####strong.net/index.php
- http://de####promise.net/index.php
- http://ri###nstorm.net/index.php
- http://fa###nce.net/index.php
- http://wa###once.net/index.php
- http://th###ncle.net/index.php
- http://dr###uncle.net/index.php
- http://fa###oss.net/index.php
- http://th###while.net/index.php
- http://ef###tbuilt.net/index.php
- http://wa###loss.net/index.php
- http://fa###tudy.net/index.php
UDP:
- DNS ASK ar###free.net
- DNS ASK th###nce.net
- DNS ASK so###free.net
- DNS ASK so###forty.net
- DNS ASK ar###forty.net
- DNS ASK th###tudy.net
- DNS ASK dr###study.net
- DNS ASK dr###loss.net
- DNS ASK dr###once.net
- DNS ASK th###oss.net
- DNS ASK up###orty.net
- DNS ASK wh###free.net
- DNS ASK wh###forty.net
- DNS ASK wh###other.net
- DNS ASK up###ther.net
- DNS ASK so###other.net
- DNS ASK ar###other.net
- DNS ASK ar###wall.net
- DNS ASK up###ree.net
- DNS ASK so###wall.net
- DNS ASK ch####nother.net
- DNS ASK mo####gduring.net
- DNS ASK of####urprise.net
- DNS ASK gw#####ynhuddleston.net
- DNS ASK si######edwerryhouse.net
- DNS ASK jo####ymeasure.net
- DNS ASK or###thrown.net
- DNS ASK se####strong.net
- DNS ASK de####promise.net
- DNS ASK ri###nstorm.net
- DNS ASK fa###nce.net
- DNS ASK wa###once.net
- DNS ASK th###ncle.net
- DNS ASK dr###uncle.net
- DNS ASK fa###oss.net
- DNS ASK th###while.net
- DNS ASK ef###tbuilt.net
- DNS ASK wa###loss.net
- DNS ASK fa###tudy.net
- '23#.#55.255.250':1900
