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Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows10-1703_x64
  • resource
    win10-20231129-en
  • resource tags

    arch:x64arch:x86image:win10-20231129-enlocale:en-usos:windows10-1703-x64system
  • submitted
    11/12/2023, 12:22

General

  • Target

    b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.exe

  • Size

    6.9MB

  • MD5

    62a63b889cb0b92d26e811fd4dceb348

  • SHA1

    0640d4933562f0fec6b23d84a2dce74bdb5532be

  • SHA256

    b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d

  • SHA512

    1796051b0166962e809a2f81601ec472bb1d2b80ffda4ef6a81d5b3a37562813bf336f068d779407534fff41630838263b3f94c3eb771616fb521f53fdba6d52

  • SSDEEP

    196608:ReusL5Sg97UrK5EvfjuiKsrGugWn7juD9k3Ozj:EVsg95KnxLrGufn765k+zj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • 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 63 IoCs
  • Runs net.exe
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.exe
    "C:\Users\Admin\AppData\Local\Temp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4308
    • C:\Users\Admin\AppData\Local\Temp\is-VF1FS.tmp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VF1FS.tmp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.tmp" /SL5="$50214,6944675,68096,C:\Users\Admin\AppData\Local\Temp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2068
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:4448
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:4140
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
          3⤵
          • Executes dropped EXE
          PID:2980
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3548
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 11
            4⤵
              PID:4988

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe

        Filesize

        87KB

        MD5

        f50221ce18b98113c82351189bb26c97

        SHA1

        aa3ac190642edacd2f568ee7d2f5b537abb4d964

        SHA256

        642cbfbb1f603bc4626a14d8df84d14ed7a16732622a783c4a122bfd79450fae

        SHA512

        d0e2c0bde830e403304df7262f154279c067a9d5d4f51747c56880c454d3e0f4ea0fa168df1fabc144ba7a682744584139153b2b54da158e9fc425cd3272800e

      • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe

        Filesize

        103KB

        MD5

        5f194ed0a365165582f9f51a4a617a6f

        SHA1

        f56a3202e52c15aeb54d44481f859161a6f7cc79

        SHA256

        fd99468add55714d1bd1f02a75bc5d6baf8e7e3250a76c9fa337ae2086df80d2

        SHA512

        6692aa866ed97886958c1e0f39add059d8428ffe55edfb485d42fae24c92d93d69108c73c6c02f98d01adb7834496267845bd23383da8c56a2329ee7337c11ce

      • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe

        Filesize

        982KB

        MD5

        8127cb76edad3ba073c23f8edc77a053

        SHA1

        61210eb9d4721a7bd15d57d2bf2872d47b95959d

        SHA256

        5dd663218b838f9a798ecf8c6eb25710001f17dbdb35cd13cf53f0a31f510ec1

        SHA512

        8c7ff9f36459b40032f5d8f24569e7b054f8b360fe527458dc730b419f4ffa45fe394371ddeb8dd2e845e17dab5b061852daa08950d2833006b2eda22b37b208

      • C:\Users\Admin\AppData\Local\Temp\is-VF1FS.tmp\b3cbc36890f58e9e9a7a245e22247e0a8a56e1b4cdc66bd50d039c98a7ca127d.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • \Users\Admin\AppData\Local\Temp\is-CTHJ9.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • \Users\Admin\AppData\Local\Temp\is-CTHJ9.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • memory/2068-163-0x00000000001F0000-0x00000000001F1000-memory.dmp

        Filesize

        4KB

      • memory/2068-7-0x00000000001F0000-0x00000000001F1000-memory.dmp

        Filesize

        4KB

      • memory/2068-161-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/2980-186-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-189-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-209-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-206-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-158-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-159-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-203-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-199-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-162-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-196-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-166-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-167-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-173-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-176-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-179-0x0000000000750000-0x00000000007EE000-memory.dmp

        Filesize

        632KB

      • memory/2980-182-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-183-0x0000000000750000-0x00000000007EE000-memory.dmp

        Filesize

        632KB

      • memory/2980-193-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2980-190-0x0000000000750000-0x00000000007EE000-memory.dmp

        Filesize

        632KB

      • memory/4140-155-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4140-151-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4140-152-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4140-154-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4308-0-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/4308-2-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/4308-160-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB