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Trojan.Siggen31.36727

Added to the Dr.Web virus database: 2025-07-03

Virus description added:

Technical Information

Malicious functions
To complicate detection of its presence in the operating system,
modifies the following system settings:
  • DNS server to '<DNS_SERVER>'
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system
Creates the following files
  • %TEMP%\e7d88.tmp
  • %TEMP%\e8066.tmp
  • %TEMP%\e8299.tmp
  • %WINDIR%\syswow64\shan.bat
  • <Current directory>\updata.bat
  • <Current directory>\dl9q.mir
  • %TEMP%\ea5df.tmp
  • %TEMP%\ea757.tmp
  • %TEMP%\ea813.tmp
  • %TEMP%\etilqs_fu41uiobha9pasq
  • %TEMP%\etilqs_urxo3j7bdltby4s
  • %TEMP%\etilqs_hwkpojgwc3lpgjd
  • %TEMP%\etilqs_w2evfhtbioulmbh
  • %TEMP%\etilqs_eyeoofe8bifrnsi
  • %TEMP%\etilqs_qcesmacxmmfa7nb
  • %TEMP%\etilqs_ekw9gw1mn2tinch
  • %TEMP%\etilqs_zairxupotq3mzlf
  • %TEMP%\etilqs_1nyrqhfo3q80j9t
  • %TEMP%\etilqs_24tlxzwv4mupnvz
Sets the 'hidden' attribute to the following files
  • <Current directory>\updata.bat
Deletes the following files
  • %TEMP%\e7d88.tmp
  • %TEMP%\e8066.tmp
  • %TEMP%\e8299.tmp
  • <DRIVERS>\etc\hosts
  • <Current directory>\updata.bat
  • %TEMP%\ea5df.tmp
  • %TEMP%\ea757.tmp
  • %TEMP%\ea813.tmp
Substitutes the following files
  • <Current directory>\updata.bat
Network activity
Connects to
  • 'localhost':80
  • 'google.com':80
  • 'au######te.geo.opera.com':80
  • 'se####.yahoo.com':80
  • 'du###uckgo.com':443
  • 'am##on.com':80
  • 'bing.com':80
  • 'en.###ipedia.org':80
  • 'au######te.geo.opera.com':443
  • 'am##on.com':443
  • 'se####.yahoo.com':443
  • 'en.###ipedia.org':443
  • 'si#####ck2.opera.com':80
  • 'pk#.goog':80
  • 're###.opera.com':80
  • 'fa###ook.com':80
  • 'bl#####st.rkn.gov.ru':80
  • 'bl#####st.rkn.gov.ru':443
TCP
HTTP GET requests
  • http://www.google.com/favicon.ico
  • http://au######te.geo.opera.com/geolocation/
  • http://se####.yahoo.com/favicon.ico
  • http://www.am##on.com/favicon.ico
  • http://www.bing.com/s/a/bing_p.ico
  • http://en.###ipedia.org/favicon.ico
  • http://si#####ck2.opera.com/?ho###################################################
  • http://pk#.goog/gsr1/gsr1.crt
  • http://re###.opera.com/www.opera.com/firstrun/
  • http://si#####ck2.opera.com/?ho######################################################
  • http://re###.opera.com/speeddials/partner/facebook
  • http://www.fa###ook.com/campaign/landing.php?ca#########################
  • http://bl#####st.rkn.gov.ru/
  • http://bl#####st.rkn.gov.ru/DDoS01/36fd25b6/
Other
  • '<DNS_SERVER>':53
  • 'du###uckgo.com':443
  • 'am##on.com':443
  • 'au######te.geo.opera.com':443
  • 'se####.yahoo.com':443
  • 'en.###ipedia.org':443
  • 'bl#####st.rkn.gov.ru':443
UDP
  • DNS ASK 1.######heng.sinaapp.com
  • DNS ASK 52##zu.com
  • DNS ASK microsoft.com
  • DNS ASK google.com
  • DNS ASK au######te.geo.opera.com
  • DNS ASK se####.yahoo.com
  • DNS ASK du###uckgo.com
  • DNS ASK am##on.com
  • DNS ASK bi##.#ikimedia.org
  • DNS ASK bing.com
  • DNS ASK en.###ipedia.org
  • DNS ASK si#####ck2.opera.com
  • DNS ASK pk#.goog
  • DNS ASK re###.opera.com
  • DNS ASK ww##.#opojie.com
  • DNS ASK fa###ook.com
  • DNS ASK bl#####st.rkn.gov.ru
Miscellaneous
Searches for the following windows
  • ClassName: 'Opera_MessageWindow' WindowName: '%APPDATA%\Opera Software\Opera Stable'
Creates and executes the following
  • '<Current directory>\dl9q.mir'
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c <SYSTEM32>\shan.bat
  • '%WINDIR%\syswow64\cmd.exe' /c ipconfig |findstr /r "▒╛"
  • '%WINDIR%\syswow64\ipconfig.exe'
  • '%WINDIR%\syswow64\findstr.exe' /r "▒╛"
  • '%WINDIR%\syswow64\netsh.exe' interface ip set dns name="" source=static addr=11#.#14.114.114
  • '%WINDIR%\syswow64\cmd.exe' /c <Current directory>\updata.bat
  • '%ProgramFiles(x86)%\opera\launcher.exe' -noautoupdate -- "http://www1.sopojie.com/"
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' -noautoupdate --ran-launcher -- http://www1.sopojie.com/
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera_crashreporter.exe' -noautoupdate --ran-launcher -- http://www1.sopojie.com/ /crash-reporter-parent-id=1156
  • '%WINDIR%\syswow64\netsh.exe' interface ip add dns "" 8.#.8.8 index=2
  • '%WINDIR%\syswow64\icacls.exe' <DRIVERS>\etc /t /grant:r everyone:f
  • '%WINDIR%\syswow64\icacls.exe' <DRIVERS>\etc\hosts /t /grant:r everyone:f
  • '%WINDIR%\syswow64\icacls.exe' <DRIVERS>\etc\hosts.ics /t /grant:r everyone:f
  • '%WINDIR%\syswow64\cmd.exe' /S /D /c" echo y"
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc /g everyone:f
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /g everyone:f
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts.ics /g everyone:f
  • '%WINDIR%\syswow64\attrib.exe' <DRIVERS>\etc\hosts.ics -h -r
  • '%WINDIR%\syswow64\attrib.exe' <DRIVERS>\etc\hosts -h -r
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=gpu-process --channel="1156.0.1620424543\1660038044" --enable-proprietary-media-types-playback --supports-dual-gpus=false --gpu-driver-bug-workarounds=1,19,42 --gpu-vendor-id=0x0000 --gp...
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=renderer --alt-high-dpi-setting=96 --disable-direct-npapi-requests --enable-deferred-image-decoding --lang=en-US --enable-proprietary-media-types-playback --disable-client-side-phishing-...
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=renderer --alt-high-dpi-setting=96 --disable-direct-npapi-requests --enable-deferred-image-decoding --lang=en-US --enable-proprietary-media-types-playback --extension-process --enable-we...
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.4.541873357\1199309080" --lang=en-US --no-sandbox --enable-proprietary-media-types-playback /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.5.1200751303\1618716808" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.6.101620980\1734876741" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.7.1543597399\1517566847" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera_crashreporter.exe' --type=utility --channel="1156.4.541873357\1199309080" --lang=en-US --no-sandbox --enable-proprietary-media-types-playback /prefetch:-645351001 /crash-reporter-parent-id=328
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.8.882809990\951945598" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.9.746569051\1468960161" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.10.1344060668\1713546261" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.11.1530959001\758816303" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.12.454302633\993930" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%ProgramFiles(x86)%\opera\29.0.1795.47\opera.exe' --type=utility --channel="1156.15.1546804062\1066417757" --lang=en-US --enable-proprietary-media-types-playback --ignored=" --type=renderer " /prefetch:-645351001
  • '%WINDIR%\syswow64\cmd.exe' /c <SYSTEM32>\shan.bat' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c <Current directory>\updata.bat' (with hidden window)

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

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