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Trojan.DownLoader29.52257

Added to the Dr.Web virus database: 2019-08-01

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\System\CurrentControlSet\Services\nnrtiira] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\nnrtiira] 'ImagePath' = '<SYSTEM32>\nnrtiira\erfikkiv.exe /d"<Full path to file>"'
  • [<HKLM>\SYSTEM\CurrentControlSet\services\nnrtiira] 'ImagePath' = '<SYSTEM32>\nnrtiira\erfikkiv.exe'
Malicious functions
Injects code into
the following system processes:
  • <SYSTEM32>\svchost.exe
Modifies file system
Creates the following files
  • %TEMP%\erfikkiv.exe
  • C:\documents and settings\localservice:.repos
Moves the following files
  • from %TEMP%\erfikkiv.exe to <SYSTEM32>\nnrtiira\erfikkiv.exe
Deletes itself.
Network activity
Connects to
  • 'mi##########m.mail.protection.outlook.com':25
  • 'nw#######il-lapp03.apple.com':25
  • 'alt1.aspmx.l.google.com':25
  • 'ma##.##gerstownmd.org':25
  • 'sm#####.stmaryscu.org':25
  • 'na#.###.#rotection.outlook.com':25
  • 'mx#.#omcast.net':25
  • 'mx#.#harter.net':25
  • 'eu#.###.#rotection.outlook.com':25
  • 'ma###.omh.ca':25
  • 'we##.####.exch026.serverdata.net':25
  • 'mx#######b01.gslb.pphosted.com':25
  • 'mx###t1.uic.edu':25
  • 'sb####.chem.sunysb.edu':25
  • 'mx#######f01.gslb.pphosted.com':25
  • 'et###.#ail.tiscali.it':25
  • 'MX##.tcu.edu':25
  • 'sm##.##hnshopkins.edu':25
  • 'mx####.gatech.edu':25
  • 'gmail-smtp-in.l.google.com':25
  • 'tn#####gw-02.telenor.no':25
  • 'pp#######rod-06.uit.tufts.edu':25
  • 'ASPMX.L.GOOGLE.com':25
  • 'ff######x-vip2.prodigy.net':25
  • 'in#######relays.illinois.edu':25
  • 'mx#######501.gslb.pphosted.com':25
  • 'vi#####br-mx.terra.com':25
  • 'ms#####.##c.protection.outlook.com':25
  • 'mx#######d03.gslb.pphosted.com':25
  • 'mx#.##c.iphmx.com':25
  • 'mx#######201.gslb.pphosted.com':25
  • '17#.#11.49.43':420
  • '43.#31.4.7':443
  • '14#.#6.108.92':484
  • 'alt2.aspmx.l.google.com':25
  • 'ho#########.olc.protection.outlook.com':25
  • 'mx#.###.#ailpod4-cph3.one.com':25
  • 'sm##.##broadband.co.uk':25
  • 'mt##.##0.yahoodns.net':25
  • 'mx######64701.pphosted.com':25
  • 'sm##.##b.shawcable.net':25
  • 'mx#######801.gslb.pphosted.com':25
  • 'mx#######001.gslb.pphosted.com':25
  • 'mx#.#anmail.net':25
  • 'de#######.#ail.protection.outlook.com':25
  • 'ba####.beta-inter.net':25
  • 'mx###.##il.am0.yahoodns.net':25
  • 'mt#.inet.fi':25
  • 'd1######.#ss.barracudanetworks.com':25
  • 'sm####n.orange.fr':25
  • 'ma##.##oupemarcelle.com':25
  • 'sm######.mc.a.cloudfilter.net':25
  • 'EM####03.saic.com':25
  • 'mx#.##ailsrvr.com':25
  • 'ma##.#tlanticbb.net':25
  • 'mx######b2d01.pphosted.com':25
  • '14#.#6.199.43':420
  • '14#.#6.199.2':420
  • '85.##.119.25':420
  • '46.#.52.109':420
  • 'mx####.##il.gm0.yahoodns.net':25
UDP
  • DNS ASK mi##########m.mail.protection.outlook.com
  • DNS ASK mx###t1.uic.edu
  • DNS ASK pl###iew.com
  • DNS ASK ib#.com
  • DNS ASK ru###r.csub.edu
  • DNS ASK mc###.med.umich.edu
  • DNS ASK sb####.sunysb.edu
  • DNS ASK tr###world.edu
  • DNS ASK xr###.#hem.sunysb.edu
  • DNS ASK mo####gefamily.com
  • DNS ASK mx#######f01.gslb.pphosted.com
  • DNS ASK ti##ali.it
  • DNS ASK et###.#ail.tiscali.it
  • DNS ASK ma##.mcg.edu
  • DNS ASK tc#.edu
  • DNS ASK we##.####.exch026.serverdata.net
  • DNS ASK ui#.edu
  • DNS ASK sb####.chem.sunysb.edu
  • DNS ASK MX##.tcu.edu
  • DNS ASK mo####lmotors.com
  • DNS ASK sm#####.stmaryscu.org
  • DNS ASK ha####townmd.org
  • DNS ASK ma##.##gerstownmd.org
  • DNS ASK we##v.net
  • DNS ASK na#.###.#rotection.outlook.com
  • DNS ASK co##ast.net
  • DNS ASK mx#.#omcast.net
  • DNS ASK ch##ter.net
  • DNS ASK mx#.#harter.net
  • DNS ASK om#.ca
  • DNS ASK ma###.omh.ca
  • DNS ASK li#e.fr
  • DNS ASK eu#.###.#rotection.outlook.com
  • DNS ASK mx#######b01.gslb.pphosted.com
  • DNS ASK ez#.net
  • DNS ASK co###ctpr.com
  • DNS ASK sa####e.heald.edu
  • DNS ASK jh##.jhmi.edu
  • DNS ASK te##r.com
  • DNS ASK ps####atry.uc.edu
  • DNS ASK mu.edu
  • DNS ASK te###.com.br
  • DNS ASK vi#####br-mx.terra.com
  • DNS ASK ma##.atu.edu
  • DNS ASK ms#.com
  • DNS ASK sm##.##hnshopkins.edu
  • DNS ASK ms#####.##c.protection.outlook.com
  • DNS ASK mx#.##c.iphmx.com
  • DNS ASK ya###.com.au
  • DNS ASK co###serve.com
  • DNS ASK mx####.##il.gm0.yahoodns.net
  • DNS ASK un###nnex.com
  • DNS ASK in#######relays.illinois.edu
  • DNS ASK ui##.edu
  • DNS ASK mx#######501.gslb.pphosted.com
  • DNS ASK ff######x-vip2.prodigy.net
  • DNS ASK am###tech.net
  • DNS ASK ho##ail.fr
  • DNS ASK ec#.#atech.edu
  • DNS ASK mx####.gatech.edu
  • DNS ASK ya##o.fr
  • DNS ASK us####strust.org
  • DNS ASK gm##l.com
  • DNS ASK alt1.aspmx.l.google.com
  • DNS ASK gmail-smtp-in.l.google.com
  • DNS ASK st###yscu.org
  • DNS ASK tn#####gw-02.telenor.no
  • DNS ASK pp#######rod-06.uit.tufts.edu
  • DNS ASK co###bluth.com
  • DNS ASK ASPMX.L.GOOGLE.com
  • DNS ASK bl#####pitalcorp.com
  • DNS ASK ma###ette.edu
  • DNS ASK ca###digital.no
  • DNS ASK we#####nk.welch.jhu.edu
  • DNS ASK tu##s.edu
  • DNS ASK ap#.edu
  • DNS ASK nw#######il-lapp03.apple.com
  • DNS ASK ap##e.com
  • DNS ASK mx#######001.gslb.pphosted.com
  • DNS ASK ms#.edu
  • DNS ASK mx#######801.gslb.pphosted.com
  • DNS ASK ya##o.ca
  • DNS ASK ha##ail.net
  • DNS ASK mx#.#anmail.net
  • DNS ASK uo##sc.edu
  • DNS ASK uo########.mail.protection.outlook.com
  • DNS ASK de##a.edu
  • DNS ASK de#######.#ail.protection.outlook.com
  • DNS ASK bl##mail.dk
  • DNS ASK ba####.beta-inter.net
  • DNS ASK ya##o.es
  • DNS ASK sh#w.ca
  • DNS ASK mx######64701.pphosted.com
  • DNS ASK ou##c.edu
  • DNS ASK mx###.##il.am0.yahoodns.net
  • DNS ASK mt##.##0.yahoodns.net
  • DNS ASK wo###ster.edu
  • DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
  • DNS ASK 19#.###.#11.95.bl.spamcop.net
  • DNS ASK 19#.###.#11.95.zen.spamhaus.org
  • DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
  • DNS ASK 19#.###.#11.95.cbl.abuseat.org
  • DNS ASK ma###ndale.com
  • DNS ASK alt2.aspmx.l.google.com
  • DNS ASK si####ipi.inet.fi
  • DNS ASK ho##ail.com
  • DNS ASK ho####hansen.com
  • DNS ASK mx#.###.#ailpod4-cph3.one.com
  • DNS ASK my####office.co.uk
  • DNS ASK sm##.##broadband.co.uk
  • DNS ASK ya##o.com
  • DNS ASK us#.edu
  • DNS ASK 19#.###.211.95.in-addr.arpa
  • DNS ASK ho#########.olc.protection.outlook.com
  • DNS ASK cl#####ntmckenna.edu
  • DNS ASK ro####nnerjeans.com
  • DNS ASK or##ge.fr
  • DNS ASK us.#bm.com
  • DNS ASK ma##.#tlanticbb.net
  • DNS ASK mx######b2d01.pphosted.com
  • DNS ASK lk####.wednet.edu
  • DNS ASK mx#.##ailsrvr.com
  • DNS ASK sm##.##b.shawcable.net
  • DNS ASK ma##.##neric.wednet.edu
  • DNS ASK um###.#ontevallo.edu
  • DNS ASK aa##hic.com
  • DNS ASK ft.com
  • DNS ASK st###ord.edu
  • DNS ASK mx#######d03.gslb.pphosted.com
  • DNS ASK tk#.edu
  • DNS ASK tr##.net
  • DNS ASK mx#######201.gslb.pphosted.com
  • DNS ASK at###ticbb.net
  • DNS ASK my###.tnstate.edu
  • DNS ASK mt#.inet.fi
  • DNS ASK si###nownw.com
  • DNS ASK sm####n.orange.fr
  • DNS ASK li###atier.com
  • DNS ASK ma##.##oupemarcelle.com
  • DNS ASK br##n.edu
  • DNS ASK mc##i.com
  • DNS ASK sm######.mc.a.cloudfilter.net
  • DNS ASK lm##.ucsb.edu
  • DNS ASK so####rivein.com
  • DNS ASK sc##or.com
  • DNS ASK mu#.edu
  • DNS ASK bu###r.uu.edu
  • DNS ASK ta##cd.edu
  • DNS ASK lo####ar.utsa.edu
  • DNS ASK pt##ma.edu
  • DNS ASK d1######.#ss.barracudanetworks.com
  • DNS ASK sa##uan.edu
  • DNS ASK EM####03.saic.com
  • '<DNS_SERVER>':53
Miscellaneous
Creates and executes the following
  • '<SYSTEM32>\nnrtiira\erfikkiv.exe' /d"<Full path to file>"
  • '<SYSTEM32>\cmd.exe' /C mkdir <SYSTEM32>\nnrtiira\' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C move /Y "%TEMP%\erfikkiv.exe" <SYSTEM32>\nnrtiira\' (with hidden window)
  • '<SYSTEM32>\sc.exe' create nnrtiira binPath= "<SYSTEM32>\nnrtiira\erfikkiv.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
  • '<SYSTEM32>\sc.exe' description nnrtiira "wifi internet conection"' (with hidden window)
  • '<SYSTEM32>\sc.exe' start nnrtiira' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /C mkdir <SYSTEM32>\nnrtiira\
  • '<SYSTEM32>\cmd.exe' /C move /Y "%TEMP%\erfikkiv.exe" <SYSTEM32>\nnrtiira\
  • '<SYSTEM32>\sc.exe' create nnrtiira binPath= "<SYSTEM32>\nnrtiira\erfikkiv.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
  • '<SYSTEM32>\sc.exe' description nnrtiira "wifi internet conection"
  • '<SYSTEM32>\sc.exe' start nnrtiira
  • '<SYSTEM32>\svchost.exe'

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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