Analysis

  • max time kernel
    150s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250502-en
  • resource tags

    arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    28/05/2025, 07:08

General

  • Target
    3140fba8ad677a9f7cce3fa4a3dd64585c190170ba1254597834a39c733c95e3.exe
  • Size 80KB
  • Sample250528-hyn3catrs7
  • SHA256 3140fba8ad677a9f7cce3fa4a3dd64585c190170ba1254597834a39c733c95e3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 1 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (5544) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • 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.

  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3140fba8ad677a9f7cce3fa4a3dd64585c190170ba1254597834a39c733c95e3.exe
    "C:\Users\Admin\AppData\Local\Temp\3140fba8ad677a9f7cce3fa4a3dd64585c190170ba1254597834a39c733c95e3.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1788
    • C:\Users\Admin\AppData\Local\Temp\_desktop.ini.exe
      "_desktop.ini.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:3836
    • C:\Windows\SysWOW64\Zombie.exe
      "C:\Windows\system32\Zombie.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:3924

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.exe.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-330179853-1108322181-418488014-1000\desktop.ini.exe.tmp
        • Size 81KB
        • SHA256 cb8848bee7b3065f873b1a048d35778e23609bba7ce175a6e4a47245f625527d
        • MD5 SHA1 SHA512 SSDEEP

        desktop.ini.tmp

        • Path C:\$Recycle.Bin\S-1-5-21-330179853-1108322181-418488014-1000\desktop.ini.tmp
        • Size 40KB
        • SHA256 14346b78c70c01d56cf5a217cd96af7d26e13b55b68721dc20f885cb66064219
        • MD5 SHA1 SHA512 SSDEEP

        2010_x64.log.html.exe

        • Path C:\3465ddb0bcbae00cf09b71154c\2010_x64.log.html.exe
        • Size 126KB
        • SHA256 551bcac17feac39c9b42addacfc4ad02abe84861b76f63a195a2ac47cb3aa077
        • MD5 SHA1 SHA512 SSDEEP

        7-zip.chm.exe

        • Path C:\Program Files\7-Zip\7-zip.chm.exe
        • Size 157KB
        • SHA256 3bd54f922f92137e752fb866a6e2743ea0bc90da848c031d4ef3a3cc903f67db
        • MD5 SHA1 SHA512 SSDEEP

        7z.dll.tmp

        • Path C:\Program Files\7-Zip\7z.dll.tmp
        • Size 876KB
        • SHA256 550de16e874b1696bc6f623a4dd1ccd3268babe290fc0055fc30309fa8bbda66
        • MD5 SHA1 SHA512 SSDEEP

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 589KB
        • SHA256 a01a08353145cd381df3125c7eb73c88737cef31192dd6a59ff3d1fbcf79dd33
        • MD5 SHA1 SHA512 SSDEEP

        7z.sfx.tmp

        • Path C:\Program Files\7-Zip\7z.sfx.tmp
        • Size 251KB
        • SHA256 1ac990c46d3c207ed0d69f502700ffb9ca6892db3373fbdc54083b23c8b82396
        • MD5 SHA1 SHA512 SSDEEP

        7zCon.sfx.tmp

        • Path C:\Program Files\7-Zip\7zCon.sfx.tmp
        • Size 230KB
        • SHA256 be6c51328986b862e80d787af365ec56a6e310adf5591c177ffd6b83fdf5ed5c
        • MD5 SHA1 SHA512 SSDEEP

        7zFM.exe.tmp

        • Path C:\Program Files\7-Zip\7zFM.exe.tmp
        • Size 1004KB
        • SHA256 7fc613fac89dd5b2baff3332d0d78f2362227f99358f41ed65b3ccb7c062f9a9
        • MD5 SHA1 SHA512 SSDEEP

        7zG.exe.tmp

        • Path C:\Program Files\7-Zip\7zG.exe.tmp
        • Size 360KB
        • SHA256 4a184ec757b4e67df23bc1c0838c15a85d3e036035c5e9206a4a0c41c7a771c6
        • MD5 SHA1 SHA512 SSDEEP

        7zG.exe.tmp

        • Path C:\Program Files\7-Zip\7zG.exe.tmp
        • Size 732KB
        • SHA256 df784999a52737a6aeb3a8d032c02948419acad5de68ba27be0bfc6e1d2056ed
        • MD5 SHA1 SHA512 SSDEEP

        af.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\af.txt.tmp
        • Size 49KB
        • SHA256 e7d2f30feaf6a89c65a33733b246cff8932c7ca10f86e9e25d75ad6d3c366e34
        • MD5 SHA1 SHA512 SSDEEP

        an.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\an.txt.tmp
        • Size 48KB
        • SHA256 8952f2fc4856b8a2fbdca143a79d17679fd018bb1fb8ed45211aae455f35e51e
        • MD5 SHA1 SHA512 SSDEEP

        ar.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ar.txt.tmp
        • Size 52KB
        • SHA256 d9d3ed1738d845d46e6ffc65dc3f80bf8538d4f81ac5c2c5145adacacc75d046
        • MD5 SHA1 SHA512 SSDEEP

        ast.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ast.txt.tmp
        • Size 40KB
        • SHA256 55f2bf2871c23b5fdfac16c18ab8485cc6a4788460aa720366b0bcaa537faa26
        • MD5 SHA1 SHA512 SSDEEP

        az.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\az.txt.tmp
        • Size 50KB
        • SHA256 11945f061b6e78c4a0490b35573e408143ff5af04fe3739a43abe95382687c84
        • MD5 SHA1 SHA512 SSDEEP

        be.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\be.txt.tmp
        • Size 52KB
        • SHA256 23e59376b9d3cf27d204ef800473efcf6903a22716e7e26db82a31292ffdf76d
        • MD5 SHA1 SHA512 SSDEEP

        bn.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\bn.txt.tmp
        • Size 55KB
        • SHA256 df45f4b72a0ea9e84b971d24849c5bb40a66a5a20eed8e2c19ea85252dafc0a7
        • MD5 SHA1 SHA512 SSDEEP

        br.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\br.txt.tmp
        • Size 50KB
        • SHA256 89801c0ddae35e96903f8ffe67cfb15e0d0bb978efc56146f75d1896209bca68
        • MD5 SHA1 SHA512 SSDEEP

        ca.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ca.txt.tmp
        • Size 49KB
        • SHA256 d80c3705511168193bc7230ed585aceb1655df2ec91436b429e2831a57f307aa
        • MD5 SHA1 SHA512 SSDEEP

        cs.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\cs.txt.tmp
        • Size 50KB
        • SHA256 303ef3cab552a38ced31f8e0cd8e9035e277a9957e3044e3f8246b9cdb575af0
        • MD5 SHA1 SHA512 SSDEEP

        cy.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\cy.txt.tmp
        • Size 50KB
        • SHA256 b4c86fcb7c1096454de8688efe596e51990287035215c4801f2194ef8c002732
        • MD5 SHA1 SHA512 SSDEEP

        da.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\da.txt.tmp
        • Size 47KB
        • SHA256 a0ed1e72b5024adc7490738e518fdbd8e6c260ff083fe7eee1a2abf910b1fd8f
        • MD5 SHA1 SHA512 SSDEEP

        el.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\el.txt.tmp
        • Size 58KB
        • SHA256 64c5031513c8aa69d2eecb7f18668581054eacdfe1ed480c3ceb9d346e38d0d2
        • MD5 SHA1 SHA512 SSDEEP

        en.ttt.tmp

        • Path C:\Program Files\7-Zip\Lang\en.ttt.tmp
        • Size 48KB
        • SHA256 53fd8a18b83e683d9f5ef62fb626b9830b6e2c2b2b1237f39ee260250edf8b92
        • MD5 SHA1 SHA512 SSDEEP

        et.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\et.txt.tmp
        • Size 47KB
        • SHA256 e025627e94c57ad585d87f01f31607889cbec03c9cb19b0ecc5e024654a97378
        • MD5 SHA1 SHA512 SSDEEP

        ext.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ext.txt.tmp
        • Size 48KB
        • SHA256 111eebaf53869f6dcfec22e6b9273c0c8d9ff9561c31e1615db231d55ee98e78
        • MD5 SHA1 SHA512 SSDEEP

        fa.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\fa.txt.tmp
        • Size 53KB
        • SHA256 fcbece40c00963aea230361ec95bbc54b8eeb8b93516e806821c54db6ebd149e
        • MD5 SHA1 SHA512 SSDEEP

        ga.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ga.txt.tmp
        • Size 48KB
        • SHA256 a0a99aa735dedffdd9b6a71eedd031cafc9fcebbd4199023b16dc2815c2a0f39
        • MD5 SHA1 SHA512 SSDEEP

        gu.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\gu.txt.tmp
        • Size 57KB
        • SHA256 b788e76542786a41e60b61b3c45ceaafaebb3e88a392276bbb29bbbdc435048d
        • MD5 SHA1 SHA512 SSDEEP

        hi.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\hi.txt.tmp
        • Size 57KB
        • SHA256 97a6db1672f3a54f577aaa7c52e7e59401a27b35295b94ddb678a49396ddc2ac
        • MD5 SHA1 SHA512 SSDEEP

        hr.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\hr.txt.tmp
        • Size 48KB
        • SHA256 8ec5656ba28190de022d6f050eea3314ee639852864ebb192abb8e9301a9b49c
        • MD5 SHA1 SHA512 SSDEEP

        hu.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\hu.txt.tmp
        • Size 50KB
        • SHA256 c08766ea1f54a46cb4811e1e4cec1ef3c9173ed190bd739986a9b6adfe6f5903
        • MD5 SHA1 SHA512 SSDEEP

        hy.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\hy.txt.tmp
        • Size 53KB
        • SHA256 b47988022dab7b5f6932de5c335ca2f4a06b0fd0861d32edd7f2ffc0b483c3ee
        • MD5 SHA1 SHA512 SSDEEP

        io.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\io.txt.tmp
        • Size 49KB
        • SHA256 1777716b2cd29e4ad56278e40b47567500cdb9228ca4aced503d2bda2253d5cd
        • MD5 SHA1 SHA512 SSDEEP

        is.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\is.txt.tmp
        • Size 48KB
        • SHA256 612e542526086be66c3b7a23c36416350a296a6220851d7fe1750fb6be154052
        • MD5 SHA1 SHA512 SSDEEP

        it.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\it.txt.tmp
        • Size 50KB
        • SHA256 73e808f14e2c94c42ec713ca32b634be55a21cad346e755504c73ad7e5216f69
        • MD5 SHA1 SHA512 SSDEEP

        ja.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ja.txt.tmp
        • Size 52KB
        • SHA256 762a7eea940a544ea23ccd0198eeb03ef72d679df4b74dee72f0449d30c28f42
        • MD5 SHA1 SHA512 SSDEEP

        kaa.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\kaa.txt.tmp
        • Size 48KB
        • SHA256 76900e92c8a4e74881fe84ba05a0fb86a30c9e572b990adc9d0f074f72c7a6c1
        • MD5 SHA1 SHA512 SSDEEP

        kk.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\kk.txt.tmp
        • Size 50KB
        • SHA256 5ccb8bf5266d959024e64e545dc99ec32d01c5ce62cb99a3c024bb90ae7e6009
        • MD5 SHA1 SHA512 SSDEEP

        ku-ckb.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ku-ckb.txt.tmp
        • Size 52KB
        • SHA256 ed6c460a01bfaab911592dc7abe1d14c02e9bd2940c53aa8e184f94d3dd16727
        • MD5 SHA1 SHA512 SSDEEP

        ky.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ky.txt.tmp
        • Size 51KB
        • SHA256 674a735057043f8b7a1f1d5be156d960d47124de4ae2e64411b85bf49315a326
        • MD5 SHA1 SHA512 SSDEEP

        lij.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\lij.txt.tmp
        • Size 47KB
        • SHA256 157bce0559c2dce042fc9bd098fb25d25a9ad0bf05e6e66893652a24cbdfa186
        • MD5 SHA1 SHA512 SSDEEP

        lv.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\lv.txt.tmp
        • Size 50KB
        • SHA256 70a37ad17627b3c914f4caa3b56b3ed5b5ac5e446de1c9b91ff770e5c49f3e33
        • MD5 SHA1 SHA512 SSDEEP

        mn.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\mn.txt.tmp
        • Size 48KB
        • SHA256 748703a097aaab16602ecdde1c83bdc16800b1f8b3d14b5b36c61e045fc65af4
        • MD5 SHA1 SHA512 SSDEEP

        mng.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\mng.txt.tmp
        • Size 60KB
        • SHA256 dd374a8c860973dc3482c21a63249e0b75505696a29149c877a033f838a6fbf2
        • MD5 SHA1 SHA512 SSDEEP

        mr.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\mr.txt.tmp
        • Size 50KB
        • SHA256 efbd30b7796d822e7666d946463c38281dcf2bdfa2e68e54b55688c4911750ba
        • MD5 SHA1 SHA512 SSDEEP

        pa-in.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\pa-in.txt.tmp
        • Size 53KB
        • SHA256 fd769d257647ba90bb62d8c893bff8165c0071ebb9a75bf205674a38d98e0728
        • MD5 SHA1 SHA512 SSDEEP

        pl.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\pl.txt.tmp
        • Size 49KB
        • SHA256 0e45e180be29340a2e1348935d075931f2da23bac73e9c241e5fc49d7342d885
        • MD5 SHA1 SHA512 SSDEEP

        ps.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\ps.txt.tmp
        • Size 48KB
        • SHA256 8bc935a19cbe2dfdceb0111387f3eb6ce251e4dd6b4967e3ee40cb6f5a1dacfa
        • MD5 SHA1 SHA512 SSDEEP

        pt-br.txt.tmp

        • Path C:\Program Files\7-Zip\Lang\pt-br.txt.tmp
        • Size 49KB
        • SHA256 3d20808e66a33808143c7b806344071e32dfffc0e2a86fcba11a11d45c2c310b
        • MD5 SHA1 SHA512 SSDEEP

        descript.ion.tmp

        • Path C:\Program Files\7-Zip\descript.ion.tmp
        • Size 41KB
        • SHA256 8d93843e6da19b8741039562e47159f27860edbcc1d6b0ea4f2b7d81b2ab9bbb
        • MD5 SHA1 SHA512 SSDEEP

        System.Threading.Timer.dll.tmp

        • Path C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.Timer.dll.tmp
        • Size 55KB
        • SHA256 16c480ecd546deb72b56c833cfb55dfa45e2216679ac09560bc1b3998ef4c3d8
        • MD5 SHA1 SHA512 SSDEEP

        _desktop.ini.exe

        • Path C:\Users\Admin\AppData\Local\Temp\_desktop.ini.exe
        • Size 40KB
        • SHA256 cf64715935007034bd8f5c6b7ed1666fa6f52b4ea86e9d0922eb67d87342b958
        • MD5 SHA1 SHA512 SSDEEP

        Zombie.exe

        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 40KB
        • SHA256 3b8b78f032b05f8b7c48663fb5d96df9ecf491a74c23bfd354558fd42b9e42e6
        • MD5 SHA1 SHA512 SSDEEP

        2010_x86.log.html.exe

        • Path C:\b5678467481f56688dc2ce816954\2010_x86.log.html.exe
        • Size 121KB
        • SHA256 6de506b9fcbfa5e413946e517240c3dc0240379f185ee75f1405b54e15f35a0a
        • MD5 SHA1 SHA512 SSDEEP

        memory/1788-1696-0x0000000000400000-0x0000000000407000-memory.dmp