Analysis

  • max time kernel
    72s
  • max time network
    76s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    21-11-2024 17:11

General

  • Target

    SteamSetup.exe

  • Size

    1.5MB

  • MD5

    81448c2e730b50b597bbd5e43007ce6a

  • SHA1

    4b1b85ec2499a4ce07c89609b256923a4fc479e5

  • SHA256

    3bc6942fe09f10ed3447bccdcf4a70ed369366fef6b2c7f43b541f1a3c5d1c51

  • SHA512

    c9125b79012e00fc9ee800592dece583a97756b5f4485c4649f3a11143afa673b4d386af256129032064f158186542bca7da70cd31770cd7eb4a3176c96e7124

  • SSDEEP

    24576:QDliBd5TyliR0gWwOvTCU1z3zk51iq449nkU0/1COmcrOqpXzzE2YeshfLKB7:QD8tylwXoTCWi1iq1nkU09lRENhJLKB7

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 20 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SteamSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\SteamSetup.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1180
    • C:\Program Files (x86)\Steam\bin\steamservice.exe
      "C:\Program Files (x86)\Steam\bin\steamservice.exe" /Install
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:3348
  • C:\Program Files (x86)\Steam\steam.exe
    "C:\Program Files (x86)\Steam\steam.exe"
    1⤵
    • Executes dropped EXE
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    PID:4196

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Steam\Steam.exe

    Filesize

    3.1MB

    MD5

    565d90cdc73f2cbc03d5c184c70fc524

    SHA1

    a676fab0be82968b922df4f611eda4dda63b7806

    SHA256

    70bde9e88aa386aa5139cac0c8a78b5576f1bed9e5f719c4e620d5c0cf7d5cbf

    SHA512

    7723098706d990259f6fcfc96c3dad15de951148b7122004b39e2e8c6db87f64d91cf45b693af88e1d0837824d96ec05dfba54ab7a02088a0b3f9052c2c335c2

  • C:\Program Files (x86)\Steam\bin\SteamService.exe

    Filesize

    1.6MB

    MD5

    3e654318b9c1203beb7f4aefb2f6d839

    SHA1

    5b147ca8d77e4985298c63d0ed09a217149fe665

    SHA256

    2cdb8a21456df3dbc46c23460be079bf285b1352bd6b131f572d4cb52bacf252

    SHA512

    0cde534c2f0d350c21b1ac994c9530e9692c9738921393c9c61ca7e1af8d8587fae7b8bfa1038fead9a630c0fc0a257967a962cbb55c6bfa776162b3b6678e6a

  • C:\Program Files (x86)\Steam\public\steambootstrapper_brazilian.txt

    Filesize

    7KB

    MD5

    0fad7d2f29c625003ff68e645593f27e

    SHA1

    6d0d40c62d68ba1fa54239db61a98ae75d615a98

    SHA256

    e4149f2d2e2fe362241717e161838e6177a1ccc522e1b95746fbd7d05bb0749f

    SHA512

    3ed6b85098fc71bde283e6462d483a05ea217387b3de0fbbefedad1b81ba1f71ab42d35462eb836dbcde06f05ba2da14a6283fddf45ce7fc58d1b7b1f8ba5801

  • C:\Program Files (x86)\Steam\public\steambootstrapper_bulgarian.txt

    Filesize

    9KB

    MD5

    84abaf1ca4bf7372acdc9f89d3b7592d

    SHA1

    e73b80ccb67610c4b2cfc1d7c308c836bc7ea08c

    SHA256

    8dd4d81cb374750de3d3df6ffd0cc238ec5d1e3946dfef4b4c8380bdd832d0fd

    SHA512

    a572f29bb203e590a3745c28084b20134b2e5159ce04b9177c4aa371f0b184e60c07d2bb39c1692d6040338014be77ae0464e31de40ffadc84808463aa9ddc70

  • C:\Program Files (x86)\Steam\public\steambootstrapper_czech.txt

    Filesize

    7KB

    MD5

    b02ddd5e3b43e43ee9e51e13968b7a21

    SHA1

    38e224214aca0cd6931cbe72035bc912d0403f41

    SHA256

    81a445a3ceb495564829cc7b0280fa993974b33476b85edcdf87f738ca82705b

    SHA512

    7a9b46a45dcb871dc81a5c316464e3f13f51a877003cab53b811ab6fa7fa5e69b867ddc4dc2228052558bcedc2b5c5437856c9fc53f290c4e74192b13b275209

  • C:\Program Files (x86)\Steam\public\steambootstrapper_danish.txt

    Filesize

    7KB

    MD5

    d01a820b7be78e208952a7bdea47e2a8

    SHA1

    170d1c12223470ffbc0b1e7c2cfd1edeec30cc7d

    SHA256

    a6ce02cd2a342a2e2e60b42b18417b006c681cf233877b51b59db44aea0ed620

    SHA512

    30e26e5341734070206c6058a66b1fc5e055dce8bb002ea37ee417eea30c49633cf13769f553f66a532a6398d071b2b79ee6e5199b6b8b9cc7af6b2aebd718ad

  • C:\Program Files (x86)\Steam\public\steambootstrapper_dutch.txt

    Filesize

    7KB

    MD5

    a24b4785c1da9b9838cca95099f973de

    SHA1

    73567a621fade953c308ac405a0bd9d0fc9bde08

    SHA256

    9c7b92b27cadcfe7ad1f47764cda4d6f5d9c64e30507463c277581e580858a43

    SHA512

    1b4dafe6a2ae68bb9469f1aaf20beb0b66aa3f1d0c8d548ff483fa30d1b419f75dbac2608a8dbc393e0e7dd84b72470e7146a3b518666f3cf9d6f952f912c8b2

  • C:\Program Files (x86)\Steam\public\steambootstrapper_english.txt

    Filesize

    3KB

    MD5

    6df4e3ebc6d7c96fe41c4c5213f17efa

    SHA1

    4dc2b996f828c1a1568a0f3a3fdfcbe5ca2fba2e

    SHA256

    6387f9aff0226a5226d5d4f0fbe77ac80797ca621f0892034f38f0bf2370e4e1

    SHA512

    e5eca80531c70d8c4ec7032885151dbc4072fa4a914a997796db8b62fcd27a42349987cd176bc5cc9ebf788ddcb125578b2306c02c1b27d44ac2dae0e2725aea

  • C:\Program Files (x86)\Steam\public\steambootstrapper_finnish.txt

    Filesize

    7KB

    MD5

    537fd7e53fd7c2c0bb5a2b26a0bf8867

    SHA1

    07d833c88ee67699c2d50cab18449621a545fed5

    SHA256

    fae3118f870c1adb564f641fee63ca1334a0f65213b16201511b343bbdaac544

    SHA512

    680b91571493813092f1b98e1ed03abe7f18af9639c7b3a2cc74ba968395994a96bcd9368020bf65f55729bb60214a676e27d6aa0bfb32de6b276499882e10ca

  • C:\Program Files (x86)\Steam\public\steambootstrapper_french.txt

    Filesize

    7KB

    MD5

    0182a05cf3aa48b0df12d899ee137ebd

    SHA1

    78ffdef2199e40fddfa253ff981c0602ae595b30

    SHA256

    46ce11c8add1fc89abe663b42a18e24c11ff8377a2ed2a4c35e835bb696701e1

    SHA512

    239e988e0020f4c3aec78932f865e1c7c21f68426e661e32386619b990b343065b46e023857c73f07d0c00410eedd5607427b67f32d483ced0b1be4a94778d1d

  • C:\Program Files (x86)\Steam\public\steambootstrapper_german.txt

    Filesize

    7KB

    MD5

    825465df8bd77c7e0aeb03736d1096c2

    SHA1

    c716ef125e014136ae3817babffc2b7de91b99da

    SHA256

    6925960062dce683a30621506b4da178054df17144fb18fff387230d561c46d1

    SHA512

    acaa8d94eb99835db1dce248c490049df26b31ce843d53f0d8afc8615930e0f0273a9baaabb02095510fbb01f984baca5897dd48fda33cdd6254b0a2afc963b0

  • C:\Program Files (x86)\Steam\public\steambootstrapper_greek.txt

    Filesize

    8KB

    MD5

    8bfaf948d2a968637202cfa810f6ff44

    SHA1

    d5c8f7c7ed891a7639148a91139fff69042785c6

    SHA256

    98205d4543eb8ea31dd97d6596d6d495b8b077c34ab3d2e525cdd3fd801f06be

    SHA512

    594e4f81f5037731b7e67b6b9232bab23a6318a155f2e587d7352fbb3ebf84785a7b8dc3856b3db2d8f6c94285bdec5596a9433a6aac54c03890183b2abb939b

  • C:\Program Files (x86)\Steam\public\steambootstrapper_hungarian.txt

    Filesize

    7KB

    MD5

    9f40b6b09785b41f1518c86e1101dcf3

    SHA1

    db36e656fc7487504f5ae8ddc3a33d34b278512b

    SHA256

    82d9da0c4f4f1971ad133e61238c4dbd946b9a58e766efd36a949f975b96ed8d

    SHA512

    66d3746e6be2b96041e7b95ae955b1bc052476752106062e26c241d3198da9e3631c7346dc5140f772dd61ffd3291b6e6ec787b09061c2f41f9c5b8cdd8cea1e

  • C:\Program Files (x86)\Steam\public\steambootstrapper_italian.txt

    Filesize

    7KB

    MD5

    153ab0f90e90e2db5d89d5223fa23d28

    SHA1

    ff009664e4e9982639c488fe9a3750e58caa1ae3

    SHA256

    f79ec156b7a205a8b34714fa32b1d5f7523cf738daf8b216100cb2cfe8489396

    SHA512

    da816b48f2489b1f0438253fb200e2b80fbb093491ea591d91c7677500ed71d23bc71eed93f4545b6cfa4ca2e37353c4d12ac2dc6c741b2641adba0e9b90b7f3

  • C:\Program Files (x86)\Steam\public\steambootstrapper_japanese.txt

    Filesize

    8KB

    MD5

    9c00f0cf5f52c9b6e1288abed68219b2

    SHA1

    f2381506a01c2d08532554de368be68b37c1bc05

    SHA256

    3e3cd5b49164d7fbfb16e1b0896955f2a8c50e1b1a0264f5b542df5be60d22ed

    SHA512

    ff92c247002cacd3c1b246320987ecdb398fce4bc84c2a26c2bf1c6d588b19d3f5a5a3c64655ae559aa0a369dc7470cde1a6e192c9185567e993c9222a1e49d4

  • C:\Program Files (x86)\Steam\public\steambootstrapper_koreana.txt

    Filesize

    7KB

    MD5

    ee823b913cae33aace5bde417e748c47

    SHA1

    f8c733ed0324898cbacff1920a86b99595f3736c

    SHA256

    b2b890baf9241a1e49adf9ba78bc70870265dbbc87d9523b47fa82da5238304d

    SHA512

    552a803802619039cc09e339f36708a3cbf78e16d1002c5e83522e6eaea10c04896d28d4b602b2226abc1cffb7f3fe96a68a2414c367a02729e573bcc0884894

  • C:\Program Files (x86)\Steam\public\steambootstrapper_norwegian.txt

    Filesize

    7KB

    MD5

    845a648a8042cbca41977824a4356feb

    SHA1

    05bcedd9ef743f92ec8563247f9e3c269fea1e88

    SHA256

    80ae7f593db16f9d5d33b75d19d43f3f3bbf0cfe017fdb0148c0eecb0aac0232

    SHA512

    9860ece0ee2221e463356c2c578c2df429f20c6ae56c475f9bb9999ed69ebd611ed101de2a054c495ea4e3bfb9184542f47968e80ed07f8a29e8186808fe89aa

  • C:\Program Files (x86)\Steam\public\steambootstrapper_polish.txt

    Filesize

    7KB

    MD5

    d0d360beca051a6150c638c814111884

    SHA1

    dfa0c223ff598095f1cd3b1bb31045c9474ee28f

    SHA256

    361fd526dee6c2f56084b6ca6079ca4ff1a52eea5878293d5dbcd8f7d6e9e2f1

    SHA512

    e92fe0abeaa21f662685658d1c4a02d50187d3fc55982567a8e39582ee1fbab57201bfa891bca6e76bd674f6daa51aa4fd5952f1e6a1d677fe6f0499e7f54909

  • C:\Program Files (x86)\Steam\public\steambootstrapper_portuguese.txt

    Filesize

    7KB

    MD5

    4a32371d0b6a48d7a43e5c1dec5c4f6c

    SHA1

    b51c36fabf2f605b7c69c42d03124d6b3172daa7

    SHA256

    cf9bbc83e6e80f288abce4b16f10d1bec89d7116695076a81150ee6578a53e37

    SHA512

    03617a9c386961f6ba05d922b708181117095fe342b5fd753278bcc7b91cf839135c7c9760040e707dc95cb5997bfe2e0c344b0b2be4def1c8d82ce1c068d67a

  • C:\Program Files (x86)\Steam\public\steambootstrapper_romanian.txt

    Filesize

    7KB

    MD5

    35f63d2eaf9c5031e0c38849e5e2846e

    SHA1

    150c6ec4f686f2611133a9451b829be2298d4235

    SHA256

    c1ae90b2b0eb2b6c0bdd18ee480ad8a55d48973f70577c7c6b387330b3aec0aa

    SHA512

    aa7508905f91ff69e1b9cdf16375309b038b0e864a04f0d1af19f28e44a0f31463202560f078b14eb61c88997dc540073c90a3bf5751a2fdeb7f065cf4327982

  • C:\Program Files (x86)\Steam\public\steambootstrapper_russian.txt

    Filesize

    8KB

    MD5

    71ad4a77bc487de7bad27a795a1d1523

    SHA1

    c179512988d6c241e4867a4725c448232208f8ef

    SHA256

    5afefcfa874796394cecf88dc82e6efbbb8c5d7c0337309b253494856c384659

    SHA512

    6ed41c9066fc433df7d96b9b9a38a5b170621eda3f84a0cf3f9b1f3e964cf510845e4bbcd07e73d404959ca213e35a90d443793fedaacf65b06e74f1878072ad

  • C:\Program Files (x86)\Steam\public\steambootstrapper_schinese.txt

    Filesize

    7KB

    MD5

    d8f7880a0ab573162d50fd41e7ede586

    SHA1

    7791ac9ffcfb3a4d78c362b0df78903f8380d7e1

    SHA256

    dc70b1acce126b30f4dc246444e0e599aa3c5285136a62d9636514d4e2db479f

    SHA512

    f1f5753a665e96b5bb00fec95986483c880516701993bde8be9111e093816863be0881ffd78c01811bf84bd50de00827340cd470629b4ea700ad614d996804d6

  • C:\Program Files (x86)\Steam\public\steambootstrapper_spanish.txt

    Filesize

    7KB

    MD5

    3b5f0ab6990fb39fa4215c4b55f7d8fc

    SHA1

    c9f2ae1fb72edbf42193da053a3afff4cf8daf6e

    SHA256

    278eecab7d6d7c8639f0114c382343067f19288fe0cd2778bbc9b3cec50d7da3

    SHA512

    3a94a213e3ca3ff0e4f0fa7e5108064e23011bb6e5d19a4581c901bdea31f3780a092f93bbf1059a91a73929728066ecb855dff402f2de5b8b514afbd446131f

  • C:\Program Files (x86)\Steam\public\steambootstrapper_swedish.txt

    Filesize

    7KB

    MD5

    47ec6fb3d98e01976d7aa81658789f6e

    SHA1

    dd0843152cfa3a6423852bab804c41fd9065a6fd

    SHA256

    c8a63c827f343a5851a9ceb352e2cb9d3ffe16797390c132c0951c53be1a91ed

    SHA512

    f41a40852ee05920165eec44fe8d69a9fddd6bc79f094a61ce33477d02088c8c051c7b636624d76d8f0d269e29fc3875c3de1557e0520b7189df47e6e32f6cc2

  • C:\Program Files (x86)\Steam\public\steambootstrapper_tchinese.txt

    Filesize

    7KB

    MD5

    b076ad87c690eeab567e54c0b8db299b

    SHA1

    56a60078bc7926702fc2ff2b98f688160d3ae0ae

    SHA256

    ce35fcd84c8f2b288de110dc74e45544a9b61bef98d29612518a41a4ee7b6d30

    SHA512

    b89b49c0d086aeb7ad7d2dcd43fd646eda47cd0dfef35f37610c0e3e7449fdfd4feebe6322174e08361521cb872ea1f9c6de53a81fa9af707f2aa8a7049a51e6

  • C:\Program Files (x86)\Steam\public\steambootstrapper_thai.txt

    Filesize

    9KB

    MD5

    1720daf2627ef4ad6626997665c74502

    SHA1

    2014ca6ab6473a9b2b95607189312e83aa493d09

    SHA256

    8eccfed053ba4881b6cd3ea518004ac98820eb6f049d9148fd74492d63d75095

    SHA512

    56808e7a542c6a414eabc2170846b6c4f13a3b54e1f73faa912d65c523b9fe7b5d36be9a6a81354a9329d4d70cc8d396c7bc9777c264dd7aa462328600e0a0e5

  • C:\Program Files (x86)\Steam\public\steambootstrapper_turkish.txt

    Filesize

    7KB

    MD5

    cc1a9b06de02d14dc28b5cb12fb805ad

    SHA1

    a2f2fd523ccb73833e41319a1305a26c82ee2e36

    SHA256

    70ddc7e39868e07b3737e648e279888865e8942c5736e7208d77597f96d8182b

    SHA512

    3aa0eb54a639032842f08f7a4a7dd933154f98ee84ca73b4d2cdb4e038a4a429b7307cfa4e1ce078318ff21710997e4d3311e5abd78caa000d1b130aa4ed9d12

  • C:\Program Files (x86)\Steam\public\steambootstrapper_ukrainian.txt

    Filesize

    8KB

    MD5

    f2ae05cc88dc6d7bc8e0e29a7622312e

    SHA1

    64366791878efac86ef7b5a4bea10a20daee45fa

    SHA256

    d1b6f19d7442784e3ea222e9506f0a45a9e981268a7035898d6c0e86932d3b9c

    SHA512

    309fa304e1b806fc17c2eceb97426b782c0194b607de4b1956b2bf2b0dfe3200cf39c077f349721f27811a978e44cad0fdba83e54672ee6c4d6bdc5106e1ce94

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\StdUtils.dll

    Filesize

    99KB

    MD5

    98a4efba4e4b566dc3d93d2d9bfcab58

    SHA1

    8c54ae9fcec30b2beea8b6af4ead0a76d634a536

    SHA256

    e2ad7736209d62909a356248fce8e554093339b18ef3e6a989a3c278f177ad48

    SHA512

    2dbc9a71e666ebf782607d3ca108fd47aa6bce1d0ac2a19183cc5187dd342307b64cb88906369784518922a54ac20f408d5a58f77c0ed410e2ccf98e4e9e39a0

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\System.dll

    Filesize

    11KB

    MD5

    a4dd044bcd94e9b3370ccf095b31f896

    SHA1

    17c78201323ab2095bc53184aa8267c9187d5173

    SHA256

    2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc

    SHA512

    87335a43b9ca13e1300c7c23e702e87c669e2bcf4f6065f0c684fc53165e9c1f091cc4d79a3eca3910f0518d3b647120ac0be1a68eaade2e75eaa64adfc92c5a

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\modern-wizard.bmp

    Filesize

    150KB

    MD5

    3614a4be6b610f1daf6c801574f161fe

    SHA1

    6edee98c0084a94caa1fe0124b4c19f42b4e7de6

    SHA256

    16e0edc9f47e6e95a9bcad15adbdc46be774fbcd045dd526fc16fc38fdc8d49b

    SHA512

    06e0eff28dfd9a428b31147b242f989ce3e92474a3f391ba62ac8d0d05f1a48f4cf82fd27171658acbd667eaffb94cb4e1baf17040dc3b6e8b27f39b843ca281

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\nsDialogs.dll

    Filesize

    9KB

    MD5

    0d45588070cf728359055f776af16ec4

    SHA1

    c4375ceb2883dee74632e81addbfa4e8b0c6d84a

    SHA256

    067c77d51df034b4a614f83803140fbf4cd2f8684b88ea8c8acdf163edad085a

    SHA512

    751ebf4c43f100b41f799d0fbf8db118ea8751df029c1f4c4b0daeb0fef200ddf2e41c1c9c55c2dc94f2c841cf6acb7df355e98a2e5877a7797f0f1d41a7e415

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\nsExec.dll

    Filesize

    6KB

    MD5

    c5b9fe538654a5a259cf64c2455c5426

    SHA1

    db45505fa041af025de53a0580758f3694b9444a

    SHA256

    7b51372117960e84d6f5eb3a26810cc044ff02283b3d656a0a456b0ab5cb8ea7

    SHA512

    f0f8a5570c01b16e54f47502e867ffbaf162b44a847c0ffc8062d20e9492114229de5d9d2a836da256fd3f9fb493536bdbf148d5308695b16c0e98d20d8926aa

  • C:\Users\Admin\AppData\Local\Temp\nsd8167.tmp\nsProcess.dll

    Filesize

    4KB

    MD5

    f0438a894f3a7e01a4aae8d1b5dd0289

    SHA1

    b058e3fcfb7b550041da16bf10d8837024c38bf6

    SHA256

    30c6c3dd3cc7fcea6e6081ce821adc7b2888542dae30bf00e881c0a105eb4d11

    SHA512

    f91fcea19cbddf8086affcb63fe599dc2b36351fc81ac144f58a80a524043ddeaa3943f36c86ebae45dd82e8faf622ea7b7c9b776e74c54b93df2963cfe66cc7