Trojan.Siggen9.16675

Technical Information

To ensure autorun and distribution

Creates the following services

[<HKLM>\System\CurrentControlSet\Services\CAE3e4TsH] 'Start' = '00000001'
[<HKLM>\System\CurrentControlSet\Services\CAE3e4TsH] 'ImagePath' = '%WINDIR%\SysWOW64\CAE3e4TsH.sys'

Malicious functions

To complicate detection of its presence in the operating system,

modifies the following system settings:

DNS server to '114.114.114.114'
DNS server to '<DNS_SERVER>'

Injects code into

the following user processes:

f58cbddece4.exe

Modifies file system

Creates the following files

%HOMEPATH%\desktop\<File name>.lnk
<DRIVERS>\9rttvkoq.sys
%WINDIR%\syswow64\cae3e4tsh.sys
<Current directory>\d3f7d71ce\caedc9a4\beada7\4640c2ttk.dll
<Current directory>\d3f7d71ce\caedc9a4\f0630c\53a6klcb1.dll
<Current directory>\d3f7d71ce\c51374aa972\a682zuwps.dll
<Current directory>\d3f7d71ce\j5bb4fbe605\e874pilfg.dll
<Current directory>\d3f7d71ce\dbd7f8\a063dgfib.dll
<Current directory>\d3f7d71ce\a5a34a8ac33\2083vztvn.dll
<Current directory>\d3f7d71ce\ee2ad561\4461kdf7a.dll
%WINDIR%\serviceprofiles\networkservice\appdata\locallow\microsoft\cryptneturlcache\metadata\f0accf77cdcbff39f6191887f6d2d357
<Current directory>\d3f7d71ce\h32963583\586ffice7.dll
<Current directory>\d3f7d71ce\caedc9a4\beada7\3eefdhad6.dll
<Current directory>\d3f7d71ce\caedc9a4\a80a440\b890qknfh.dll
<Current directory>\d3f7d71ce\caedc9a4\j42121adee\27d9koile.dll
<Current directory>\d3f7d71ce\caedc9a4\aa33ce8a9\3a0borkng.dll
<Current directory>\d3f7d71ce\caedc9a4\ifddac4078\d134hjcf8.dll
<Current directory>\d3f7d71ce\caedc9a4\f0630c\3a74y0sum.dll
<Current directory>\d3f7d71ce\h7c65c
%LOCALAPPDATA%\microsoft\windows\history\history.ie5\mshist012020030120200302\index.dat
%ProgramFiles(x86)%\mozilla thunderbird\f58cbddece4.exe
<Current directory>\d3f7d71ce\caedc9a4\a2431511\7616jlfid.dll
%WINDIR%\serviceprofiles\networkservice\appdata\locallow\microsoft\cryptneturlcache\content\f0accf77cdcbff39f6191887f6d2d357

Deletes the following files

%LOCALAPPDATA%\microsoft\windows\history\history.ie5\mshist012020030120200302\index.dat
<Current directory>\d3f7d71ce\h7c65c
<Current directory>\d3f7d71ce\caedc9a4\f0630c\3a74y0sum.dll
<Current directory>\d3f7d71ce\caedc9a4\beada7\3eefdhad6.dll
<DRIVERS>\etc\hosts

Substitutes the following files

<Current directory>\d3f7d71ce\h7c65c
<Current directory>\d3f7d71ce\caedc9a4\f0630c\3a74y0sum.dll
<Current directory>\d3f7d71ce\caedc9a4\beada7\3eefdhad6.dll

Network activity

TCP

HTTP GET requests

http://hh.####ong666.com.com/hanhua.txt
http://si###torage.com/question/PrsProt64.rar
http://x.##2.us/x.cer
http://os#.##iyungx.com/data.php?t=#####
http://os#.##iyungx.com/xinlistj.rar
http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt
http://os#.##iyungx.com/listh.rar
http://os#.##iyungx.com/exeFeatureCode.rar
http://co####5.51yes.com/sa.htm?id###############################################################################################################################################################...
http://os#.##iyungx.com/updata64.php?t=#######
http://os#.##iyungx.com/updata64.rar
http://o.##2.us//MEowSDBGMEQwQjAJBgUrDgMCGgUABBSLwZ6EW5gdYc9UaSEaaLjjETNtkAQUv1%2B30c7dH4b0W1Ws3NcQwg6piOcCCQCnDkpMNIK3fw%3D%3D
http://oc##.###tg2.amazontrust.com/MFQwUjBQME4wTDAJBgUrDgMCGgUABBSIfaREXmfqfJR3TkMYnD7O5MhzEgQUnF8A36oB1zArOIiiuG1KnPIRkYMCEwZ%2FlEoqJ83z%2BsKuKwH5CO65xMY%3D
http://oc##.####ca1.amazontrust.com/MFQwUjBQME4wTDAJBgUrDgMCGgUABBRPWaOUU8%2B5VZ5%2Fa9jFTaU9pkK3FAQUhBjMhTTsvAyUlC4IWZzHshBOCggCEwZ%2FlFeFh%2Bisd96yUzJbvJmLVg0%3D
http://cr#.####ca1.amazontrust.com/rootca1.crl
http://si###torage.com/question/B64d.rar
http://si###torage.cn/question/dpkf15980.rar
http://pc####e.cnzz.com/app.gif?&c###########################
http://si###loud.net/question/pl35231.rar
http://cn##.mmstat.com/9.gif?ab##################
http://c.##zz.com/core.php?we###################
http://si###loud.net/question/vc8
http://z7.#nzz.com/stat.htm?id###################################################################################################################################################################...
http://s1#.#nzz.com/z_stat.php?id#############################
http://os#.##iyungx.com/md5exe.rar
http://co####5.51yes.com/click.aspx?id##################
http://lo#####.yaotongji.com:8080/ via lo#####.yaotongji.com
http://hl.####engxuefuzhu.com/
http://bj##me.cn/nt.asp
http://si###torage.cn/question/dns.txt
http://si###torage.cn/question/data.txt
http://www.ba##u.com/
http://oc##.###1b.amazontrust.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQz9arGHWbnBV0DFzpNHz4YcTiFDQQUWaRmBlKge5WSPKOUByeWdFv5PdACEAdDanwPzhhRia1inuyQjLA%3D
http://cr#.####b.amazontrust.com/sca1b.crl

'co#.com':443

UDP

DNS ASK si###torage.cn
DNS ASK cr#.####ca1.amazontrust.com
DNS ASK oc##.####ca1.amazontrust.com
DNS ASK oc##.###tg2.amazontrust.com
DNS ASK o.##2.us
DNS ASK os#.##iyungx.com
DNS ASK x.##2.us
DNS ASK si###torage.com
DNS ASK pc####e.cnzz.com
DNS ASK cn##.mmstat.com
DNS ASK si###loud.net
DNS ASK c.##zz.com
DNS ASK z7.#nzz.com
DNS ASK s1#.#nzz.com
DNS ASK co####5.51yes.com
DNS ASK co#.com
DNS ASK lo#####.yaotongji.com
DNS ASK hl.####engxuefuzhu.com
DNS ASK bj##me.cn
DNS ASK ti######.beijing-time.org
DNS ASK hh.####ong666.com.com
DNS ASK ba##u.com
DNS ASK oc##.###1b.amazontrust.com
DNS ASK cr#.####b.amazontrust.com

Miscellaneous

Searches for the following windows

ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebCheckMonitor' WindowName: ''

Creates and executes the following

'%ProgramFiles(x86)%\mozilla thunderbird\f58cbddece4.exe' WfCSeCZ4ex4kgR6Seh92KDx7JntO
'%WINDIR%\syswow64\ipconfig.exe' /flushdns' (with hidden window)

Executes the following