Trojan.Siggen30.7748

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'sms5521' = '%APPDATA%\sms5521.tmp'

Creates or modifies the following files

<SYSTEM32>\tasks\sms5521
%APPDATA%\microsoft\windows\start menu\programs\startup\sms5521.lnk

Creates the following files on removable media

<Drive name for removable media>:\us11b.exe
<Drive name for removable media>:\indogerman2010.pptx.lnk
<Drive name for removable media>:\gruenspecht_02172016.pptx.lnk
<Drive name for removable media>:\waterresourcesag.pptx.lnk
<Drive name for removable media>:\stoc13_ml_quoc_le.pptx.lnk
<Drive name for removable media>:\ksearch_esa_talk.ppt.lnk
<Drive name for removable media>:\ppswamp.ppt.lnk
<Drive name for removable media>:\metac.ppt.lnk
<Drive name for removable media>:\proposaltemplates.ppt.lnk
<Drive name for removable media>:\arrow-down.png.lnk
<Drive name for removable media>:\calibre.png.lnk
<Drive name for removable media>:\block.png.lnk
<Drive name for removable media>:\cbz.png.lnk
<Drive name for removable media>:\breakpoint.png.lnk
<Drive name for removable media>:\delongcacert.pem.lnk
<Drive name for removable media>:\server.pem.lnk
<Drive name for removable media>:\dualectls.pdf.lnk
<Drive name for removable media>:\ff_ot_user_guide.pdf.lnk
<Drive name for removable media>:\spib_pima.pdf.lnk
<Drive name for removable media>:\7790_preview.pdf.lnk
<Drive name for removable media>:\51.mp4.lnk
<Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4.lnk
<Drive name for removable media>:\hypothyroidism_slides.pptx.lnk
<Drive name for removable media>:\asaprojectcompetition.pptx.lnk
<Drive name for removable media>:\roozenedowebinar.pptx.lnk
<Drive name for removable media>:\digest.rdf.lnk
<Drive name for removable media>:\calculatorworksheet.zip.lnk
<Drive name for removable media>:\price030215.zip.lnk
<Drive name for removable media>:\al.xlsx.lnk
<Drive name for removable media>:\applicant.xlsx.lnk
<Drive name for removable media>:\highly_cited_2001.xlsx.lnk
<Drive name for removable media>:\2013_smccc_competition_points_jul2013.xlsx.lnk
<Drive name for removable media>:\trtf_matrix2012_oct.xlsx.lnk
<Drive name for removable media>:\suspendedcompanies.xlsx.lnk
<Drive name for removable media>:\national_autism_preparation_programs.xlsx.lnk
<Drive name for removable media>:\excel_example.xls.lnk
<Drive name for removable media>:\contractualdeadlines.xls.lnk
<Drive name for removable media>:\guide_reorganization_mapping.xls.lnk
<Drive name for removable media>:\subjectclassification.xls.lnk
<Drive name for removable media>:\fiche_inscription_2015.xls.lnk
<Drive name for removable media>:\testwmv.wmv.lnk
<Drive name for removable media>:\flower_trans_matte.wmv.lnk
<Drive name for removable media>:\passport_pal.wmv.lnk
<Drive name for removable media>:\router_manual.rtf.lnk
<Drive name for removable media>:\pandp.rtf.lnk
<Drive name for removable media>:\krsweden.rtf.lnk
<Drive name for removable media>:\military_callsigns_0311.rtf.lnk
<Drive name for removable media>:\20140114.rdf.lnk
<Drive name for removable media>:\fiche_inscription_2015.zip.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>:\etc6_m_1.mov.lnk
<Drive name for removable media>:\hadac_newsletter_july_2010_final.docx.lnk
<Drive name for removable media>:\aoc_saq_d_v3_merchant.docx.lnk
<Drive name for removable media>:\adhd_and_obesity.docx.lnk
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\applicantform_en.doc.lnk
<Drive name for removable media>:\fi51.doc.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
<Drive name for removable media>:\weeklysheet1215.doc.lnk
<Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.lnk
<Drive name for removable media>:\contosoroot_1.cer.lnk
<Drive name for removable media>:\testee.cer.lnk
<Drive name for removable media>:\sdksampleprivdeveloper.cer.lnk
<Drive name for removable media>:\contoso.cer.lnk
<Drive name for removable media>:\sdkfailsafeemulator.cer.lnk
<Drive name for removable media>:\coffee.bmp.lnk
<Drive name for removable media>:\tileimage.bmp.lnk
<Drive name for removable media>:\dashborder_144.bmp.lnk
<Drive name for removable media>:\default.bmp.lnk
<Drive name for removable media>:\join.avi.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\glidescope_review_rev_010.docx.lnk
<Drive name for removable media>:\calc.exe.lnk
<Drive name for removable media>:\skypesetup.exe.lnk
<Drive name for removable media>:\utorrent.exe.lnk
<Drive name for removable media>:\2.jpg.lnk
<Drive name for removable media>:\1189.jpg.lnk
<Drive name for removable media>:\3.jpg.lnk
<Drive name for removable media>:\parnas_01.jpeg.lnk
<Drive name for removable media>:\pushkin.jpeg.lnk
<Drive name for removable media>:\2.jpeg.lnk
<Drive name for removable media>:\3.jpeg.lnk
<Drive name for removable media>:\adadsi.html.lnk
<Drive name for removable media>:\browse.html.lnk
<Drive name for removable media>:\about.html.lnk
<Drive name for removable media>:\trivial-merge.html.lnk
<Drive name for removable media>:\api-hashmap.html.lnk
<Drive name for removable media>:\64bit_notes.htm.lnk
<Drive name for removable media>:\alert.htm.lnk
<Drive name for removable media>:\advice_process.htm.lnk
<Drive name for removable media>:\browse.htm.lnk
<Drive name for removable media>:\tree_view.htm.lnk
<Drive name for removable media>:\garden.htm.lnk
<Drive name for removable media>:\ituneshelpunavailable.htm.lnk
<Drive name for removable media>:\wrar520.exe.lnk
<Drive name for removable media>:\dotnetfx45_full_setup.exe.lnk
<Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe.lnk
<Drive name for removable media>:\scan.mov.lnk
<Drive name for removable media>:\excel_example.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 '%TEMP%\sms5521.tmp'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sms5521.tmp'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%APPDATA%\sms5521.tmp'

Modifies file system

Creates the following files

%TEMP%\sms5521.tmp
%APPDATA%\sms5521.tmp

Sets the 'hidden' attribute to the following files

<Drive name for removable media>:\us11b.exe

Deletes the following files

%APPDATA%\sms5521.tmp

Substitutes the following files

%APPDATA%\sms5521.tmp

Network activity

Connects to

'ip##pi.com':80

TCP

HTTP GET requests

http://ip##pi.com/line/?fi############

UDP

DNS ASK ip##pi.com

Miscellaneous

Creates and executes the following

'%TEMP%\sms5521.tmp'

Executes the following

'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "sms5521" /tr "%APPDATA%\sms5521.tmp"
'<SYSTEM32>\taskeng.exe' {25F85A78-D528-40DF-9973-1C370A12EF3C} S-1-5-21-3691498038-2086406363-2140527554-1000:xrtxtgqsmvcc\user:Interactive:[1]
'%TEMP%\sms5521.tmp' ' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%TEMP%\sms5521.tmp'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sms5521.tmp'' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%APPDATA%\sms5521.tmp'' (with hidden window)
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "sms5521" /tr "%APPDATA%\sms5521.tmp"' (with hidden window)
'%APPDATA%\sms5521.tmp' ' (with hidden window)

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