Trojan.Siggen29.7180

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'rundll32' = '%LOCALAPPDATA%\rundll32.exe'

Creates or modifies the following files

<SYSTEM32>\tasks\rundll32
%APPDATA%\microsoft\windows\start menu\programs\startup\rundll32.lnk

Creates the following files on removable media

<Drive name for removable media>:\usb.exe
<Drive name for removable media>:\systisoft.pem.lnk
<Drive name for removable media>:\hhhlcert.pem.lnk
<Drive name for removable media>:\investmentbankca_ca8.pem.lnk
<Drive name for removable media>:\tunpersonalca1.pem.lnk
<Drive name for removable media>:\7790_preview.pdf.lnk
<Drive name for removable media>:\2015-02-patients-topic-work-related-asthma-jobs.pdf.lnk
<Drive name for removable media>:\2015-02-worms-nanoparticle-toxicity.pdf.lnk
<Drive name for removable media>:\spib_pima.pdf.lnk
<Drive name for removable media>:\lom602.pdf.lnk
<Drive name for removable media>:\10thingscondoms.pdf.lnk
<Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4.lnk
<Drive name for removable media>:\video.mp4.lnk
<Drive name for removable media>:\clip_480_5sec_6mbps_h264.mp4.lnk
<Drive name for removable media>:\spanner.mov.lnk
<Drive name for removable media>:\scan.mov.lnk
<Drive name for removable media>:\pushkin.jpg.lnk
<Drive name for removable media>:\parnas_01.jpg.lnk
<Drive name for removable media>:\region-north-karelia.jpg.lnk
<Drive name for removable media>:\2.jpg.lnk
<Drive name for removable media>:\2.jpeg.lnk
<Drive name for removable media>:\13.jpg.lnk
<Drive name for removable media>:\cert.pem.lnk
<Drive name for removable media>:\ck.pem.lnk
<Drive name for removable media>:\20140114.rdf.lnk
<Drive name for removable media>:\skos.rdf.lnk
<Drive name for removable media>:\taxus_baccata.rdf.lnk
<Drive name for removable media>:\middaugh_keynote.pptx.lnk
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx.lnk
<Drive name for removable media>:\gruenspecht_02172016.pptx.lnk
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt.lnk
<Drive name for removable media>:\metac.ppt.lnk
<Drive name for removable media>:\file1.ppt.lnk
<Drive name for removable media>:\writingcompletesarnarrative_1103.ppt.lnk
<Drive name for removable media>:\alert.htm.lnk
<Drive name for removable media>:\sim_gametheory_to_finance.ppt.lnk
<Drive name for removable media>:\ppswamp.ppt.lnk
<Drive name for removable media>:\mappingconcepthubberlin.ppt.lnk
<Drive name for removable media>:\asm.png.lnk
<Drive name for removable media>:\block.png.lnk
<Drive name for removable media>:\background.png.lnk
<Drive name for removable media>:\dissolveanother.png.lnk
<Drive name for removable media>:\arrow-down.png.lnk
<Drive name for removable media>:\irgeek.pem.lnk
<Drive name for removable media>:\pushkin.jpeg.lnk
<Drive name for removable media>:\parnas_01.jpeg.lnk
<Drive name for removable media>:\13.jpeg.lnk
<Drive name for removable media>:\fi51.doc.lnk
<Drive name for removable media>:\cveuropeo.doc.lnk
<Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\contoso.cer.lnk
<Drive name for removable media>:\sdksampleprivdeveloper.cer.lnk
<Drive name for removable media>:\sdkfailsafeemulator.cer.lnk
<Drive name for removable media>:\contosoroot_1.cer.lnk
<Drive name for removable media>:\testee.cer.lnk
<Drive name for removable media>:\dashborder_96.bmp.lnk
<Drive name for removable media>:\default.bmp.lnk
<Drive name for removable media>:\dial.bmp.lnk
<Drive name for removable media>:\dashborder_192.bmp.lnk
<Drive name for removable media>:\split.avi.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\correct.avi.lnk
<Drive name for removable media>:\sdszfo.docx.lnk
<Drive name for removable media>:\file_p_00000000_1371597592.docx.lnk
<Drive name for removable media>:\hanni_umami_chapter.doc.lnk
<Drive name for removable media>:\adhd_and_obesity.docx.lnk
<Drive name for removable media>:\168.jpeg.lnk
<Drive name for removable media>:\glidescope_review_rev_010.docx.lnk
<Drive name for removable media>:\adadsi.html.lnk
<Drive name for removable media>:\tree_view.html.lnk
<Drive name for removable media>:\howto-index.html.lnk
<Drive name for removable media>:\ituneshelpunavailable.html.lnk
<Drive name for removable media>:\browse.html.lnk
<Drive name for removable media>:\64bit_notes.htm.lnk
<Drive name for removable media>:\trivial-merge.htm.lnk
<Drive name for removable media>:\about.htm.lnk
<Drive name for removable media>:\proposaltemplates.ppt.lnk
<Drive name for removable media>:\swc_2009-03-02.rdf.lnk
<Drive name for removable media>:\tree_view.htm.lnk
<Drive name for removable media>:\tcm851ax32.exe.lnk
<Drive name for removable media>:\utorrent.exe.lnk
<Drive name for removable media>:\skypesetup.exe.lnk
<Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe.lnk
<Drive name for removable media>:\dotnetfx45_full_setup.exe.lnk
<Drive name for removable media>:\notepad.exe.lnk
<Drive name for removable media>:\wrar520.exe.lnk
<Drive name for removable media>:\hadac_newsletter_july_2010_final.docx.lnk
<Drive name for removable media>:\advice_process.htm.lnk
<Drive name for removable media>:\elvisimp.rdf.lnk

Malicious functions

To complicate detection of its presence in the operating system,

adds antivirus exclusion with following registry keys:

[HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Paths] 'C:\' = ''

adds antivirus exclusion:

'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath 'C:\'"
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%WINDIR%\rundll32.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rundll32.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\rundll32.exe'

Modifies file system

Creates the following files

%WINDIR%\rundll32.exe
%LOCALAPPDATA%\rundll32.exe

Sets the 'hidden' attribute to the following files

<Drive name for removable media>:\usb.exe

Miscellaneous

Creates and executes the following

'%WINDIR%\rundll32.exe'
'%LOCALAPPDATA%\rundll32.exe'

Executes the following

'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "rundll32" /tr "%LOCALAPPDATA%\rundll32.exe"
'<SYSTEM32>\taskeng.exe' {4971403F-8600-4129-A40A-30769CB0CBA3} S-1-5-21-3150914307-1777937420-491476919-1000:fhatyjwiuhwj\user:Interactive:[1]
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%WINDIR%\rundll32.exe'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'rundll32.exe'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\rundll32.exe'' (with hidden window)
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "rundll32" /tr "%LOCALAPPDATA%\rundll32.exe"' (with hidden window)
'%LOCALAPPDATA%\rundll32.exe' ' (with hidden window)

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