ClickFix Campaign Abuses Mozilla Firefox Binary for DLL Sideloading

    Date: 08/13/2026

    Severity: High

    Summary

    Recent weeks have seen a rise in ClickFix social engineering campaigns delivering the KongTuke malware through DLL sideloading. The campaign abuses legitimate, digitally signed Mozilla Firefox binaries, while attackers rotate lure domains but reuse the same payload infrastructure and tools. The malicious DLLs are written in Rust and disguised as legitimate Firefox components. Three DLL variants were identified: mozglue.dll as the initial loader, firefoxupdate.dll for persistence, and xul.dll as the primary C2 implant. KongTuke uses a domain generation algorithm (DGA) to create C2 domains using infrastructure- and security-related words, numbers, and .com, .net, and .lol TLDs. The malware communicates with its C2 servers over HTTPS, beaconing approximately every 30 seconds; 128 unique malicious DLL samples were identified.

    Indicators of Compromise (IOC) List

    Domains/URLs

    appcert9869.net

    apihex6457.net

    authhash3580.lol

    authguard3329.com

    cloudpass7138.lol

    cloudupdate8155.com

    coretask8067.com

    datacast1282.com

    edgesign6542.net

    globalstore9455.lol

    loginpass4171.lol

    logintoken2318.net

    microcrypt1987.com

    netkey8407.lol

    nodemetrics9095.com

    nodetask5648.net

    oosterhout.click

    statrun3390.net

    telepass2968.com

    Hash

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    Filepaths 

    %LOCALAPPDATA%\Mozilla\Firefox\Updates\firefoxupdate.dll

    %LOCALAPPDATA%\Mozilla\Firefox\Updates\mozglue.dll

    %LOCALAPPDATA%\Mozilla\Firefox\Updates\xul.dll

    %LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe

    %LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe.local

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

    Detection Query 1 :

    domainname like "nodetask5648.net" or url like "nodetask5648.net" or siteurl like "nodetask5648.net" or domainname like "apihex6457.net" or url like "apihex6457.net" or siteurl like "apihex6457.net" or domainname like "globalstore9455.lol" or url like "globalstore9455.lol" or siteurl like "globalstore9455.lol" or domainname like "microcrypt1987.com" or url like "microcrypt1987.com" or siteurl like "microcrypt1987.com" or domainname like "appcert9869.net" or url like "appcert9869.net" or siteurl like "appcert9869.net" or domainname like "cloudpass7138.lol" or url like "cloudpass7138.lol" or siteurl like "cloudpass7138.lol" or domainname like "logintoken2318.net" or url like "logintoken2318.net" or siteurl like "logintoken2318.net" or domainname like "nodemetrics9095.com" or url like "nodemetrics9095.com" or siteurl like "nodemetrics9095.com" or domainname like "coretask8067.com" or url like "coretask8067.com" or siteurl like "coretask8067.com" or domainname like "telepass2968.com" or url like "telepass2968.com" or siteurl like "telepass2968.com" or domainname like "loginpass4171.lol" or url like "loginpass4171.lol" or siteurl like "loginpass4171.lol" or domainname like "authguard3329.com" or url like "authguard3329.com" or siteurl like "authguard3329.com" or domainname like "oosterhout.click" or url like "oosterhout.click" or siteurl like "oosterhout.click" or domainname like "cloudupdate8155.com" or url like "cloudupdate8155.com" or siteurl like "cloudupdate8155.com" or domainname like "datacast1282.com" or url like "datacast1282.com" or siteurl like "datacast1282.com" or domainname like "authhash3580.lol" or url like "authhash3580.lol" or siteurl like "authhash3580.lol" or domainname like "edgesign6542.net" or url like "edgesign6542.net" or siteurl like "edgesign6542.net" or domainname like "statrun3390.net" or url like "statrun3390.net" or siteurl like "statrun3390.net" or domainname like "netkey8407.lol" or url like "netkey8407.lol" or siteurl like "netkey8407.lol"

    Detection Query 2 :

    sha256hash IN ("8a4772d3f51dcd8e7620153a0587ffb68e9e6e0391c6d2f87d1d4ce36c296d1d","f6cfd352f28e759210dca7cafdc25a388c2f53c9d54159fe109f8e4d602f4758","b3825894e3ad20c6e5c374edddeaf9f3e0f431832c11fe1e450283cb2cbb0893","d2b39e52e1ebca82a3c0f2f45283cc11d983185cf7b63d636f23acbad971f4e4","6a3abac4674286acb454e3423bcd3cd3fac0e6568edaac801cc820f3819f818c","06c14bde9b55bef9fb44fb5d69831ee8128cbc49b522561f753418f314db9b33","5aa834962a21a5cee5fb9ce6895cc5050f8c26b3e4ed3501e5746b1b41877a6b","256b9df18cfd3824b9fe902a3735ee7a6b37c570487a17e0700415891e266948","23504c2440e6afccf4870edcae23dee9c0da1487deccb9daeca650a2143c965e","fcfbd0bdf05665f7a1e510e0ba0655f46cabca4b62d8f5208a5e1ad1564c85c0","d2045b8e693941c1997ccc36dd9fd139ab5793aa9c69960f2ffe77d57e777901","43127d9efe415b6d0329a97a719f7f5eeda45a1a5def69c763d1ef3ab9a6ec95","975b5d9d7c08ff5401690d64a5dc18929e571b97fbca676749ecc9e6393754c1","877a7c73ee8c08db7d2b0c62fe6c253c65726433310f1b8a82528f5a8854daa1","a9865f8d2976c403ce580ef392520f2ecc4701167638983cb70aaac8840f6c8f","e4f50783b002310de4c8262beba9e9d2e995b196b3e8970f60b2e8bf545e5257","fc15406249efda3972416625cebab46be623e6eb9c144f2a1ac13535cc2ee974","bcff465edf2038824e88093d0473a7adf6765115632833036bfa2be9e455cdd5","f0f2f3d690255ff4fcd40253b49b6a3f1f327728bb8c98b8a040ecbef5118a5e","8a9f995de70e8b23799685921a6e746f349b2ce4391ce5ece97c8727e3362a31","dbe175f53ab84dd0bb15a67973aa9aa26299392f4388a927a043a60a4dacd455","8cd8ccfa53a0eb7eb667b0c2a32bdc821b58cc5f91bc3e2b11e298b8dc49d743","a2d8696bb83ea30d2e7b8e8dff009459001c74eeabc12f92d19beb4210813efb","30b7c0e3f7d166bd5dc93f41b8b568757721692eede27a79851425e501a9f904","40a03d714c66d3c75c43d568e9c69ef2d4fd295215762c16bf82bf463926f1b2","42aca36b928855c676d44c92538427cd69fbbda89d950ba677677a435a8497b5","ac5cb834877da84cee93ca9802e5280e822d85d083bcf5d1fef464b243f53c06","52d34ab8e783ae72d7dd112087a04ffbeba8f7c793307cee7b0eb6af4fce8025","1b30f8365647b9d05c82f40d1becdc21f7348b17bc7dd1921d7db7351cf5113c","d7b3cd0e88b3e12ed5044fbab8729d8e9894178ade7e60bb969fa410f2408529","48ebb5877655eba88ea259ed3779a13f8ed9d5f27c8cd0b250c62674e0959745","762351828e4411d636a2836655f89878306bee3d0222910017b30339d69d30bf","e17e08710ab074618c381c49adfe56a49d50e74fb11d591de3d834dcb36ce292","42971cd3786fb75abda634addaca83b1ffe7dadcfe637634a2dd07ac3b7eedb6","7db9414d1fd40a55b9796fb95cd55aa6c284eef2392bcc7d4cdc37a3036d15d6","10d5e027a45233ff37fcca1c0f4d0788d131bb0f7f2b9e6577d00e3ed0144b41","b2cb64ebab2c6c3189504d8704e094f8e6f23eefd87d3569a86b5f40a176c6dd","33acf7b79c81cd3d24ceddd23f91488aa484794001e1325b4f36d0d51ff252d1","afe4ad8a3ba51b12352a3b188e2c8aa0388aefca5c506d7f3ea7f16476841f1e","49075bd5d9382369b66d4fad8c5482647d361d0250ccc1cb82b09ba455fc93ac","c15abedb5426e2417c8db34200169f95e6e1b468c9d6c345a0b4693bd3d52d78","1da7efbbdf7c49193f00716c23ffc6aa7bf95cf7a0592d043b87273deed403d3","07deee42951c53ff81881080a6c46f0986a461ba4f95cc7acbfe0c897054f651","4f50c30b1ff2658ffd38f33895e6bfb822d8149ceca2e34416d252d0be4ed9d4","2c73a08a8cce265c3186f02c988f39eccdecea8bc102304e8913e6312fd1b8be","b67193c84e807fb958cf13d33c62be76c06bb1073ba105ce5f2b32d55db49996","c5b7edfdeb623b43c3a54b8b73d6ad07595582b9f1373a16ff712b171f8a0687","1b7b3f1884ba49adaa96bde879ee5d76952659c3adfb4649d45ab10ab0aac673","d4cae14f5010e6c3826692fdfaf80c4bc0e5448982d31c91968188f4fbbd86d6","eac1e3e085ccd5bb755a85037e106136abab59df404274cf662623fa4b457fed","b851222b211fc8c7a4fbe0e7f9fad7c19249a10960b66f63b4d21bae248cc40c","44be324a882540831d0a6e4c2f8428dfb83767070d698ec912939327d0153526","a6f242703a710fa30b3087193f4f595779a0594a4ba02b5055709baa0a69e1f7","11491daa43f5c67d8b04575904c41a8ef72c2ad1ae087d47ed632e739ebe9175","634b91d328ef3287c9916f0a5003eb326f0e358267a65aa0c26838f0667c9701","495b05833f83e1b9b2b66b6d0cb4b1ba30792ab6896564a79fd873de40b2c40f","436f17eb5246432da1b848dc159df9f1067e6d52adc108f25b651280979e87d9","ec335926c09647775506d9d7931bf869272b94bd77b9123ac668ca0050432804","4ef606fca13098762921f9d66499fb60c043bf990942d8054dd80365bf5ab782","8d07f47e8b7452be4fed0ceec709d5688f82a04e731481e1ad3d88cf100dbb71","3ed67bfabc24e61177ac84f3159670b32a84d06bc9a561c7dd32ca021b7f84b3","40ee40aeccce6aead225d8fed2bed7380746fcdd4849d69687ddfa7f8836dbf7","b2f8101166f30744e754e2773f5eeeff9074898d06796d8628ccc52aa7fdb8d2","2f342120d9d68248e6bc17fd9953e3af8e5a7858f4a18e802c858cc9c74a1b58","62437c9dd9f67223a705213340ca67e34303428a52c4b0986af2ea3c563e4ded","98b39b8851ae90aba6a77157aedc7fdd7618c80195ced06de2d9e130acce1853","7a8c07ee3869f68ec91006e073b581358bd5df43e1a4c009d2dc64e87f138d7d","056a5cdabf72199382313b0966490d18b7d002ab1638c194a1325d9aaf7ce5dd","144fb57167d377175adfef53701f799efdbd9025b7fcc1ac417e5e2c3808b195","f9d378f5e6a0dbca15ae355190f58f66f2e33024a5216f9f0cc065f8c68a3cd0","cc0535ee561a750b1ab51fc661d8a836d3c8c91f0ddc4820a5a560460466fb53","455b1b2b1b69e01a36055c5af1ff279c3bd93e98ab9c39f2c6a94b57b373951c","919a8705ca4948c9709b7bcc5e4d1ea6538c57fad0e2e2017989b85756d2b135","ca514ad9c634a88cac0d3803f77b12d5cdecad3e7fb8a227dc63176a2a01e8c6","e8b9ecbfd99694bf745a78d13eee6d051d6c4803c84d3c162bed76690a83e742","da9dfbc674016ef7ea3f7a66784cff3a528588ecc7d3a4d5c4e50aec6118c61f","9f02b43df2715c3525002ecfd524b77c2e4098434467705865543c065b613700","0d2e98966b556694a8e37cbb15fd80e234de6b69b86ef138c6b94b642361ef79","4b4c960bde89451af10ab75fd21593901d174e99cc03ce30b757c536dabe55ba","837d58c74eabb57af392d0f5a6ee951002108990911f7cf46e4196601890d12a","52509442ddd3d7e4c808a0e95fba3429b04cc4f788319a909816fc3819de985e","8b76e15e2d19a3b42f5a32d84dbfd52432fe19587a9228a6b7d4480c02eebeda","f949c9e9a1afd6b803ab40c29308056d2cb70da3e15bbb7312bc1d9cfd6f33a0","93cf7719e664fd0c9507dd03059950f934b3e98d004677a1104fbd30a1b94047","e220cdfb485e601ea7c41e5643dae7519383923fe3643c5958f454f9034196a8","3437aaf76e6a2d86ceff6f8f97b0268d515405416b32ae6708aa67c29aca6200","a77e8d66cdd86e61cbea6772998e764be6078ec76c4c0b95f79a635815b18343","e8674b65cafed63da7ebd909dfb10a93c3de18e1b460c7a508173e6c315a936f","666da8a2a1be6d93617a9f0d5dea5e848d68b97cce68d6c9360697355a8aa10c","36bf4d1f0b7dd37d2c17ae2decd642c4f1c9d76248b891537de678c3ab8a4dfe","064190e0763f35bb09f6d958e74e8ec81f71d73c9c37c9d7b7bf5ad33b75272c","d07b5e707bed378b2f47d87ba0c9ebb33f21cc36558ccf050583d26a739c5fdc","fb5a8f751726e3fc9e9d7707e38603242e776f9d7c3d68107ca28ab28ed49ad9","0234f3afddedb16450e7f9c51ec55a3c935ce568806a7c1888aae048d44ae441","d50c16e1613a31d6a9fb6b79ad8f48abfdf9f0071fbf1b439dd8847a7924f216","b0ac32f1c4b1a1a961cc5a59237525c8bd70049046fabc9d47624985af26490e","f539cd08a7d398f61886da7e07c5d08e9b286bba049eff1ad5f7f0b8a604030c","e5c4703fbffce38c1d123f2b5bca7f6ab8a02ef0026bc7124d73de7025e27f91","28d2a13c2c0c533fa040133319bbac72014bdbb50d50d8bf49fe26fcffe1ea73","1980a537471f396648756cb0052e0316b0805f5cdcc7adf2fbe35c9ea8b0ddee","57f0589bad69a5bb620cced9e83b1fb0710332990571ab2a0d7435e3ebb7763b","aeabc537c6d2c3205496b75c26998e8594490c920ec92cf94d425065314a7654","3bbb61effd38ce0dd6b3c36c44363a8de11a389eb67af8f16ddeab90ace5dddf","1688a443eb441c5c824d8b71ef89e23222aa6a82d908ad05241a2702b25d1dfb","2dc4cd857195e02522a9a4c666c69c263517ded672775911241bdcb39af36b5a","19ebf9a37f53bf701ca99cd42e6cef4c0e3d702604bac259db359fb90e634f2f","baffd080e8341f15372f91d7c1d6d3e45771c7166d955cda95edeb9a7ecaae71","83ce22b18dbf947ac7ba134971fab753f4a4ecca85006784a9543adc46a2b69b","cca32312abd37aa680b42c285fdc872b55f121aaf3ce0c475c281351ae8b35d5","f61aa6f2f925900b119347aa8ea1a5fa15a13cd49686a3852a6f44396b0255f8","99cd699edcb762cc25cc3a4c31c429a9772fd2b1be4029372944e87e5c7e9ca9","db67096f70a4656b3616486bd7ab52f22bd5efe90b62f7c332472f26c7952282","0e0051287e704337fb9834706e194130de4b800f023501477919521abdd9a372","bd3876fbe91d5d1557baf04230ff69f0c0697e07f78b78b6d110a7bd683c2abe","3642cf0c279dea30171bd78564b15833f37aad953ae3e2e56a8d561e80e87c97","6e58929ff4c95c819e20b3ab4b179cbda4f556fe12b3003b9ac6961e516c4a7a","28976e498642e6b9900e8738022cece9e54db410e6a6671b3e55e92d7bf96696")

    Detection Query 3 :

    datasourcename = "Windows Security" and eventtype = "4663" and (objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\firefoxupdate.dll" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\mozglue.dll" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\xul.dll" or objectname like"%LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe.local")

    Detection Query 4 :

    technologygroup = "EDR" and (objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\firefoxupdate.dll" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\mozglue.dll" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\xul.dll" or objectname like"%LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe" or objectname like "%LOCALAPPDATA%\Mozilla\Firefox\Updates\plugin-container.exe.local")

    Reference:    

    https://github.com/PaloAltoNetworks/Unit42-timely-threat-intel/blob/main/2026-08-12-ClickFix-Campaign-Abuses-Mozilla-Firefox-Binary.txt                                  


    Tags

    MalwareKONGTUKEClickFixSocial EngineeringDLLSideLoadingRust MalwareLoader

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