CSuite Targets US and EU Organizations with Device-Code Phishing and Remote Access

    Date: 09/23/2026

    Severity: High

    Summary

    CSuite is a multi-stage phishing and remote-access operation targeting organizations across the US and Europe, with 60% of identified victims based in the US. Attackers use trusted lures such as Adobe, DocuSign, Zoom, SharePoint, and Microsoft 365 voicemail to steal credentials and hijack Microsoft 365 sessions through device-code authentication. The campaign also deploys legitimate remote-management tools such as ScreenConnect, Action1, Atera, Syncro, and PDQ Connect to gain endpoint access while blending into normal business activity. 

    Indicators of Compromise (IOC) List

    Domains/URLs

    gddfzxa.online

    gddfzxa.online

    ghs.coorpes.com

    greaterheights.sbs

    mmswerod.sbs

    greenbullet.ba

    emsafetoproceedtaward.top

    maillive.sbs

    arubanetworks-inc.com

    sharepointer-dr.com

    stubborn-academy.icu

    corporate-sync-gate.net

    legacy-bridge-node.net

    conferenceuniverses.buzz

    zerichoproject.org

    pdfsecurtoview.sbs

    pdfsecurtoview.cfd

    pdfsecurtoview.info

    pdfsecurtoview365.sbs

    pdfsecurtoview365.cfd

    pdfsecurtoviewsuite.sbs

    pdfsecurtoviewothers.sbs

    pdfsecurtoviewothers.cfd

    docsendsr.online

    docseed.online

    docseedn.online

    documentsonitustechnologies.sbs

    downloaddocumentcontechbuilding.sbs

    documentationreviewdocument2026review.sbs

    selectivelife01.sbs

    pikecac.cfd

    qrcoderuser.cfd

    fincapitalxcom.cfd

    allshore-io.cam

    sharerpoint.cam

    voicermailsmessager.cam

    keepsecurepasserword.cam

    giiro.net

    expressdocumentdelivery.org

    aviationpioneers.info

    ambitiousaboutautismorguk.com

    solarengyloanfunds.com

    checkingweb.net

    cellumbio.com

    mail.wirsann.com

    mail.boratlongyear.com

    sqrd.m365.sharedfile.online

    sqrd.m36s.sharedfile.tech

    shared.file.nn365.cloud

    shared.note.nn365.cloud

    shared.file.cnrv.tech

    file.shared.cnrv.tech

    loq.file.cnrv.online

    m36nx.file.cnrv.online

    file.shared.m36s.site

    file.shared.myscript.sbs

    usoffweb69.top

    netcoxweb.top

    coxnetwork.top

    doc.lauraice.xyz

    docuread.im

    docusign.web-viewww.es

    https://localcontex.online/AdobecloudReader/pdf_Reader_en_install.msi

    https://localcontex.online/review.signal-doc.cloud/.DocuSign/

    IP Address

    207.189.19.40

    185.174.102.34

    190.123.46.122

    188.127.227.18

    141.133.174.208

    91.92.41.114

    212.189.40.73

    155.254.26.180

    64.204.180.203

    31.57.147.133

    31.57.38.60

    102.67.5.132

    191.101.130.42

    102.88.167.38

    Hash

    ae7af8159f06a059411411e5e816b415e32213371fb085ced1dc5679a0112c48 

    b59e7cb539c0b81a58f60d5ca0ed3df62d1856b29076720efbb7dd9411d99eec 

    9a03a0b65b2a2d27b348e583237d512a55f3f8287989abf7ffca0285d5f8e43d 

    a89a31ec605c0ed9cd263cbdea6ee4a2c6502ec81e5b3e8a3c9fb3de945405f9 

    842f0236ea2c2b7773054920e7a870e07869c4e99f84bd31ccfd215781b4f267 

    07682ca34a9bf18beb664088e55035a83306b95b31d4aaba242e9d67f8c378a3 

    e769b2b4463e7d39320b65a49183ce4ff8c20459fa183e7b03f02e1b44420eb0 

    41734f8e6cc75b66f51638b76780f61a0b21ad9f77586e2665b7ab8d7e131936 

    eb9274a1fb6064e784f9c0ce95c78007efcadc279d4ffcac13998a45ebf7b49f 

    3a8daf4e992ea34b71b259af85d4d12ca52d80b9e2b262bd5aa5922a5a955f9f 

    c0eb04dcfa745653c466c34978a1f3b4e5041f526be8c2e46b8c722498ca746a 

    74e306072561731adf55afd4de461ec0736ca22c0b458a78e7512b2701341f28 

    394d7be5ecbe326062c1de1fb674bdcbb4dbe3ce03b4227994607047b832debd 

    c5f7083722fc5bee4e7a7109495348d3731e6b077919a6b679b9f5af885923cd 

    fd98c6881cadc47e7d425bbd4b992237a832e69fdfe872a90ba567ed58a148ad 

    375e49680fe4b4a62320bdcfd16b7bd75f6223a15d620c475c6988803b67d416 

    fdd171cc26704218b0762a33650c0d1246c42cbe583a858684e1b6ac12b9bbe7 

    2b89225801591cd223e0cf0b1faa8e7b12e88d6b6bc6ec9f5e715171137553ac 

    7b03111fa24ce01054332f013b3fe8189d2b61897e7306666c73b086588a64a5 

    0d6b451bd58b904e7dd15ce3e28ea129f7f95c9d248944fbdacdf6fb1d2adc99 

    aac51e4016c50a705a26bd56435f0fd9685e53d6bc0cc6034b7370e76d7cb376 

    aefd71902453cc83104aa963d8d9051c875d93ddf40680616e8fa5e68565ea69 

    6f62a8380eb5038e253772033c0ebc1ddb951a042c4a1a90ba8755819dc74e53 

    d995ea6f1621c29cdd4353cfb8b36cd1336b34bc8b180b73ce52cd939060bf0f 

    463786717f51b710dbbb013437141e416b98d810dfaa9f4de90a4c4939bc66b9 

    90f8e6259ce27592c460d235aff104d7507dfff4e7889c34ab714cdb19944473 

    38ba6bfe0cc2b7c5ff38f1f698e2c9bfdb52dd7937111967fddf785ba001e1f2 

    a450a84a60ce6646596feb2d6bea4c89a1b5b4e7d6325d5b7c2000982987411c 

    b1e55c9679f9aca94d66fdb08195cf8752f69f1d6896a5b2e60d979fca5a4036 

    Gurucul Threat Detection and Incident Response (TDIR) Queries for Detection

    Detection Query 1 :

    domainname like "voicermailsmessager.cam" or url like "voicermailsmessager.cam" or siteurl like "voicermailsmessager.cam" or domainname like "pdfsecurtoviewothers.sbs" or url like "pdfsecurtoviewothers.sbs" or siteurl like "pdfsecurtoviewothers.sbs" or domainname like "https://localcontex.online/AdobecloudReader/pdf_Reader_en_install.msi" or url like "https://localcontex.online/AdobecloudReader/pdf_Reader_en_install.msi" or siteurl like "https://localcontex.online/AdobecloudReader/pdf_Reader_en_install.msi" or domainname like "legacy-bridge-node.net" or url like "legacy-bridge-node.net" or siteurl like "legacy-bridge-node.net" or domainname like "usoffweb69.top" or url like "usoffweb69.top" or siteurl like "usoffweb69.top" or domainname like "sharerpoint.cam" or url like "sharerpoint.cam" or siteurl like "sharerpoint.cam" or domainname like "m36nx.file.cnrv.online" or url like "m36nx.file.cnrv.online" or siteurl like "m36nx.file.cnrv.online" or domainname like "coxnetwork.top" or url like "coxnetwork.top" or siteurl like "coxnetwork.top" or domainname like "pdfsecurtoview365.sbs" or url like "pdfsecurtoview365.sbs" or siteurl like "pdfsecurtoview365.sbs" or domainname like "emsafetoproceedtaward.top" or url like "emsafetoproceedtaward.top" or siteurl like "emsafetoproceedtaward.top" or domainname like "greaterheights.sbs" or url like "greaterheights.sbs" or siteurl like "greaterheights.sbs" or domainname like "mail.wirsann.com" or url like "mail.wirsann.com" or siteurl like "mail.wirsann.com" or domainname like "shared.note.nn365.cloud" or url like "shared.note.nn365.cloud" or siteurl like "shared.note.nn365.cloud" or domainname like "pdfsecurtoview.sbs" or url like "pdfsecurtoview.sbs" or siteurl like "pdfsecurtoview.sbs" or domainname like "aviationpioneers.info" or url like "aviationpioneers.info" or siteurl like "aviationpioneers.info" or domainname like "selectivelife01.sbs" or url like "selectivelife01.sbs" or siteurl like "selectivelife01.sbs" or domainname like "qrcoderuser.cfd" or url like "qrcoderuser.cfd" or siteurl like "qrcoderuser.cfd" or domainname like "mail.boratlongyear.com" or url like "mail.boratlongyear.com" or siteurl like "mail.boratlongyear.com" or domainname like "sqrd.m36s.sharedfile.tech" or url like "sqrd.m36s.sharedfile.tech" or siteurl like "sqrd.m36s.sharedfile.tech" or domainname like "shared.file.nn365.cloud" or url like "shared.file.nn365.cloud" or siteurl like "shared.file.nn365.cloud" or domainname like "docusign.web-viewww.es" or url like "docusign.web-viewww.es" or siteurl like "docusign.web-viewww.es" or domainname like "maillive.sbs" or url like "maillive.sbs" or siteurl like "maillive.sbs" or domainname like "arubanetworks-inc.com" or url like "arubanetworks-inc.com" or siteurl like "arubanetworks-inc.com" or domainname like "corporate-sync-gate.net" or url like "corporate-sync-gate.net" or siteurl like "corporate-sync-gate.net" or domainname like "checkingweb.net" or url like "checkingweb.net" or siteurl like "checkingweb.net" or domainname like "pikecac.cfd" or url like "pikecac.cfd" or siteurl like "pikecac.cfd" or domainname like "netcoxweb.top" or url like "netcoxweb.top" or siteurl like "netcoxweb.top" or domainname like "docseedn.online" or url like "docseedn.online" or siteurl like "docseedn.online" or domainname like "fincapitalxcom.cfd" or url like "fincapitalxcom.cfd" or siteurl like "fincapitalxcom.cfd" or domainname like "doc.lauraice.xyz" or url like "doc.lauraice.xyz" or siteurl like "doc.lauraice.xyz" or domainname like "giiro.net" or url like "giiro.net" or siteurl like "giiro.net" or domainname like "conferenceuniverses.buzz" or url like "conferenceuniverses.buzz" or siteurl like "conferenceuniverses.buzz" or domainname like "pdfsecurtoviewothers.cfd" or url like "pdfsecurtoviewothers.cfd" or siteurl like "pdfsecurtoviewothers.cfd" or domainname like "file.shared.cnrv.tech" or url like "file.shared.cnrv.tech" or siteurl like "file.shared.cnrv.tech" or domainname like "shared.file.cnrv.tech" or url like "shared.file.cnrv.tech" or siteurl like "shared.file.cnrv.tech" or domainname like "loq.file.cnrv.online" or url like "loq.file.cnrv.online" or siteurl like "loq.file.cnrv.online" or domainname like "expressdocumentdelivery.org" or url like "expressdocumentdelivery.org" or siteurl like "expressdocumentdelivery.org" or domainname like "docseed.online" or url like "docseed.online" or siteurl like "docseed.online" or domainname like "sqrd.m365.sharedfile.online" or url like "sqrd.m365.sharedfile.online" or siteurl like "sqrd.m365.sharedfile.online" or domainname like "pdfsecurtoviewsuite.sbs" or url like "pdfsecurtoviewsuite.sbs" or siteurl like "pdfsecurtoviewsuite.sbs" or domainname like "documentsonitustechnologies.sbs" or url like "documentsonitustechnologies.sbs" or siteurl like "documentsonitustechnologies.sbs" or domainname like "docsendsr.online" or url like "docsendsr.online" or siteurl like "docsendsr.online" or domainname like "keepsecurepasserword.cam" or url like "keepsecurepasserword.cam" or siteurl like "keepsecurepasserword.cam" or domainname like "greenbullet.ba" or url like "greenbullet.ba" or siteurl like "greenbullet.ba" or domainname like "sharepointer-dr.com" or url like "sharepointer-dr.com" or siteurl like "sharepointer-dr.com" or domainname like "downloaddocumentcontechbuilding.sbs" or url like "downloaddocumentcontechbuilding.sbs" or siteurl like "downloaddocumentcontechbuilding.sbs" or domainname like "zerichoproject.org" or url like "zerichoproject.org" or siteurl like "zerichoproject.org" or domainname like "ghs.coorpes.com" or url like "ghs.coorpes.com" or siteurl like "ghs.coorpes.com" or domainname like "documentationreviewdocument2026review.sbs" or url like "documentationreviewdocument2026review.sbs" or siteurl like "documentationreviewdocument2026review.sbs" or domainname like "solarengyloanfunds.com" or url like "solarengyloanfunds.com" or siteurl like "solarengyloanfunds.com" or domainname like "cellumbio.com" or url like "cellumbio.com" or siteurl like "cellumbio.com" or domainname like "pdfsecurtoview365.cfd" or url like "pdfsecurtoview365.cfd" or siteurl like "pdfsecurtoview365.cfd" or domainname like "allshore-io.cam" or url like "allshore-io.cam" or siteurl like "allshore-io.cam" or domainname like "pdfsecurtoview.cfd" or url like "pdfsecurtoview.cfd" or siteurl like "pdfsecurtoview.cfd" or domainname like "ambitiousaboutautismorguk.com" or url like "ambitiousaboutautismorguk.com" or siteurl like "ambitiousaboutautismorguk.com" or domainname like "file.shared.m36s.site" or url like "file.shared.m36s.site" or siteurl like "file.shared.m36s.site" or domainname like "pdfsecurtoview.info" or url like "pdfsecurtoview.info" or siteurl like "pdfsecurtoview.info" or domainname like "mmswerod.sbs" or url like "mmswerod.sbs" or siteurl like "mmswerod.sbs" or domainname like "docuread.im" or url like "docuread.im" or siteurl like "docuread.im" or domainname like "file.shared.myscript.sbs" or url like "file.shared.myscript.sbs" or siteurl like "file.shared.myscript.sbs" or domainname like "https://localcontex.online/review.signal-doc.cloud/.DocuSign/" or url like "https://localcontex.online/review.signal-doc.cloud/.DocuSign/" or siteurl like "https://localcontex.online/review.signal-doc.cloud/.DocuSign/" or domainname like "stubborn-academy.icu" or url like "stubborn-academy.icu" or siteurl like "stubborn-academy.icu" or domainname like "gddfzxa.online" or url like "gddfzxa.online" or siteurl like "gddfzxa.online"

    Detection Query 2 :

    dstipaddress IN ("188.127.227.18","64.204.180.203","190.123.46.122","31.57.38.60","207.189.19.40","212.189.40.73","155.254.26.180","141.133.174.208","31.57.147.133","102.67.5.132","185.174.102.34","191.101.130.42","91.92.41.114","102.88.167.38") or srcipaddress IN ("188.127.227.18","64.204.180.203","190.123.46.122","31.57.38.60","207.189.19.40","212.189.40.73","155.254.26.180","141.133.174.208","31.57.147.133","102.67.5.132","185.174.102.34","191.101.130.42","91.92.41.114","102.88.167.38")

    Detection Query 3 :

    sha256hash IN ("394d7be5ecbe326062c1de1fb674bdcbb4dbe3ce03b4227994607047b832debd","c0eb04dcfa745653c466c34978a1f3b4e5041f526be8c2e46b8c722498ca746a","463786717f51b710dbbb013437141e416b98d810dfaa9f4de90a4c4939bc66b9","a89a31ec605c0ed9cd263cbdea6ee4a2c6502ec81e5b3e8a3c9fb3de945405f9","d995ea6f1621c29cdd4353cfb8b36cd1336b34bc8b180b73ce52cd939060bf0f","aac51e4016c50a705a26bd56435f0fd9685e53d6bc0cc6034b7370e76d7cb376","74e306072561731adf55afd4de461ec0736ca22c0b458a78e7512b2701341f28","ae7af8159f06a059411411e5e816b415e32213371fb085ced1dc5679a0112c48","b59e7cb539c0b81a58f60d5ca0ed3df62d1856b29076720efbb7dd9411d99eec","9a03a0b65b2a2d27b348e583237d512a55f3f8287989abf7ffca0285d5f8e43d","842f0236ea2c2b7773054920e7a870e07869c4e99f84bd31ccfd215781b4f267","07682ca34a9bf18beb664088e55035a83306b95b31d4aaba242e9d67f8c378a3","e769b2b4463e7d39320b65a49183ce4ff8c20459fa183e7b03f02e1b44420eb0","41734f8e6cc75b66f51638b76780f61a0b21ad9f77586e2665b7ab8d7e131936","eb9274a1fb6064e784f9c0ce95c78007efcadc279d4ffcac13998a45ebf7b49f","3a8daf4e992ea34b71b259af85d4d12ca52d80b9e2b262bd5aa5922a5a955f9f","c5f7083722fc5bee4e7a7109495348d3731e6b077919a6b679b9f5af885923cd","fd98c6881cadc47e7d425bbd4b992237a832e69fdfe872a90ba567ed58a148ad","375e49680fe4b4a62320bdcfd16b7bd75f6223a15d620c475c6988803b67d416","fdd171cc26704218b0762a33650c0d1246c42cbe583a858684e1b6ac12b9bbe7","2b89225801591cd223e0cf0b1faa8e7b12e88d6b6bc6ec9f5e715171137553ac","7b03111fa24ce01054332f013b3fe8189d2b61897e7306666c73b086588a64a5","0d6b451bd58b904e7dd15ce3e28ea129f7f95c9d248944fbdacdf6fb1d2adc99","aefd71902453cc83104aa963d8d9051c875d93ddf40680616e8fa5e68565ea69","6f62a8380eb5038e253772033c0ebc1ddb951a042c4a1a90ba8755819dc74e53","90f8e6259ce27592c460d235aff104d7507dfff4e7889c34ab714cdb19944473","38ba6bfe0cc2b7c5ff38f1f698e2c9bfdb52dd7937111967fddf785ba001e1f2","a450a84a60ce6646596feb2d6bea4c89a1b5b4e7d6325d5b7c2000982987411c","b1e55c9679f9aca94d66fdb08195cf8752f69f1d6896a5b2e60d979fca5a4036")

    Reference:    

    https://any.run/cybersecurity-blog/csuite-attack-analysis/#iocs--23219                                                  


    Tags

    MalwarePhishingUnited StatesEuropeMicrosoftSharePointCredential HarvestingScreenConnect

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