Trojan.Siggen20.34369

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<File name>' = '%TEMP%\<File name>.exe'

Creates or modifies the following files

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

Creates the following files on removable media

<Drive name for removable media>:\usb.exe
<Drive name for removable media>:\hypothyroidism_slides.pptx.lnk
<Drive name for removable media>:\indogerman2010.pptx.lnk
<Drive name for removable media>:\asaprojectcompetition.pptx.lnk
<Drive name for removable media>:\accountsreceivable.ppt.lnk
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt.lnk
<Drive name for removable media>:\mappingconcepthubberlin.ppt.lnk
<Drive name for removable media>:\metac.ppt.lnk
<Drive name for removable media>:\ksearch_esa_talk.ppt.lnk
<Drive name for removable media>:\file1.ppt.lnk
<Drive name for removable media>:\block.png.lnk
<Drive name for removable media>:\arrow-down.png.lnk
<Drive name for removable media>:\background.png.lnk
<Drive name for removable media>:\calibre.png.lnk
<Drive name for removable media>:\cert.pem.lnk
<Drive name for removable media>:\ck.pem.lnk
<Drive name for removable media>:\irgeek.pem.lnk
<Drive name for removable media>:\delongcacert.pem.lnk
<Drive name for removable media>:\server.pem.lnk
<Drive name for removable media>:\ck_ugo.pem.lnk
<Drive name for removable media>:\ff_ot_user_guide.pdf.lnk
<Drive name for removable media>:\bc01.pdf.lnk
<Drive name for removable media>:\fil_20060629111052.pdf.lnk
<Drive name for removable media>:\10thingscondoms.pdf.lnk
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx.lnk
<Drive name for removable media>:\foaf.rdf.lnk
<Drive name for removable media>:\contractualdeadlines.zip.lnk
<Drive name for removable media>:\disclosuredetails.xlsx.lnk
<Drive name for removable media>:\national_autism_preparation_programs.xlsx.lnk
<Drive name for removable media>:\cee_mmsprogram_summary_public.xlsx.lnk
<Drive name for removable media>:\2013_finalsummaryforweb.xlsx.lnk
<Drive name for removable media>:\applicant.xlsx.lnk
<Drive name for removable media>:\contractualdeadlines.xls.lnk
<Drive name for removable media>:\price030215.xls.lnk
<Drive name for removable media>:\removedtitles_records.xls.lnk
<Drive name for removable media>:\calculatorworksheet.xls.lnk
<Drive name for removable media>:\passport_pal.wmv.lnk
<Drive name for removable media>:\1189.jpeg.lnk
<Drive name for removable media>:\testwmv.wmv.lnk
<Drive name for removable media>:\static_electricity_easy_and_quick_activities.rtf.lnk
<Drive name for removable media>:\myhrvoldhanssenbiharfamine.rtf.lnk
<Drive name for removable media>:\waterlandhealthkano.rtf.lnk
<Drive name for removable media>:\20140114.rdf.lnk
<Drive name for removable media>:\sioc.rdf.lnk
<Drive name for removable media>:\swc_2009-03-02.rdf.lnk
<Drive name for removable media>:\contenttypes.rdf.lnk
<Drive name for removable media>:\elvisimp.rdf.lnk
<Drive name for removable media>:\digest.rdf.lnk
<Drive name for removable media>:\7790_preview.pdf.lnk
<Drive name for removable media>:\spib_pima.pdf.lnk
<Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4.lnk
<Drive name for removable media>:\hadac_newsletter_july_2010_final.docx.lnk
<Drive name for removable media>:\cveuropeo.doc.lnk
<Drive name for removable media>:\fi51.doc.lnk
<Drive name for removable media>:\weeklysheet1215.doc.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
<Drive name for removable media>:\contoso.cer.lnk
<Drive name for removable media>:\sdksampleunprivdeveloper.cer.lnk
<Drive name for removable media>:\contosoroot_1.cer.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\testee.cer.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\pmd.cer.lnk
<Drive name for removable media>:\dial.bmp.lnk
<Drive name for removable media>:\tileimage.bmp.lnk
<Drive name for removable media>:\default.bmp.lnk
<Drive name for removable media>:\dialmap.bmp.lnk
<Drive name for removable media>:\coffee.bmp.lnk
<Drive name for removable media>:\archer.avi.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\delete.avi.lnk
<Drive name for removable media>:\wrar520.exe.lnk
<Drive name for removable media>:\winmine.exe.lnk
<Drive name for removable media>:\file_p_00000000_1371597592.docx.lnk
<Drive name for removable media>:\skypesetup.exe.lnk
<Drive name for removable media>:\spanner.mov.lnk
<Drive name for removable media>:\garden.htm.lnk
<Drive name for removable media>:\firefly1.mov.lnk
<Drive name for removable media>:\scan.mov.lnk
<Drive name for removable media>:\13.jpg.lnk
<Drive name for removable media>:\1189.jpg.lnk
<Drive name for removable media>:\4f0bf7ff71f28.jpg.lnk
<Drive name for removable media>:\region-north-karelia.jpeg.lnk
<Drive name for removable media>:\2.jpeg.lnk
<Drive name for removable media>:\3.jpeg.lnk
<Drive name for removable media>:\4f0bf7ff71f28.jpeg.lnk
<Drive name for removable media>:\1sm_price.xls.lnk
<Drive name for removable media>:\price.zip.lnk
<Drive name for removable media>:\pushkin.jpeg.lnk
<Drive name for removable media>:\parnas_01.jpeg.lnk
<Drive name for removable media>:\trivial-merge.html.lnk
<Drive name for removable media>:\browse.html.lnk
<Drive name for removable media>:\ituneshelpunavailable.html.lnk
<Drive name for removable media>:\iisstart.htm.lnk
<Drive name for removable media>:\trivial-merge.htm.lnk
<Drive name for removable media>:\alert.htm.lnk
<Drive name for removable media>:\about.htm.lnk
<Drive name for removable media>:\browse.htm.lnk
<Drive name for removable media>:\13.jpeg.lnk
<Drive name for removable media>:\productos.zip.lnk

Malicious functions

To complicate detection of its presence in the operating system,

adds antivirus exclusion:

'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '<Full path to file>'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%TEMP%\<File name>.exe'

Modifies file system

Creates the following files

%TEMP%\<File name>.exe

Sets the 'hidden' attribute to the following files

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

Deletes the following files

%TEMP%\<File name>.exe

Substitutes the following files

%TEMP%\<File name>.exe

Network activity

UDP

DNS ASK Ov######5-25483.portmap.io

Miscellaneous

Creates and executes the following

'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '<Full path to file>'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '<File name>.exe'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%TEMP%\<File name>.exe'' (with hidden window)
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "<File name>" /tr "%TEMP%\<File name>.exe"' (with hidden window)
'%TEMP%\<File name>.exe' ' (with hidden window)

Executes the following

'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '<File name>.exe'
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "<File name>" /tr "%TEMP%\<File name>.exe"
'<SYSTEM32>\taskeng.exe' {0AA308CA-87E9-4AE6-811A-5DF532E69940} S-1-5-21-1960123792-2022915161-3775307078-1001:jtzafvirz\user:Interactive:[1]

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