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Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20231201-en
  • resource tags

    arch:x64arch:x86image:win7-20231201-enlocale:en-usos:windows7-x64system
  • submitted
    11/12/2023, 15:16

General

  • Target

    tuc5.exe

  • Size

    6.9MB

  • MD5

    97e9aebfe6bcde4f4be6f58a57176337

  • SHA1

    63dfb53e24ebde8b259ce5ce1a4b2984bad007a8

  • SHA256

    080c6c9c6949ba1071c0983d7debdb64edb8c029c12c91037d8d54c1656ee0a9

  • SHA512

    42e1b90162757b06406882c0ec370a91881a0d70d490f77bd4859d87169379ddb1eb1f735a0d219601caaab2d11bff4539476c17e804a64a4f18de84a863c463

  • SSDEEP

    196608:lxOlhkHxfDumIwWJfU1IzKkGjAqiuGIqOg9zj:2jkHxfKTnJjzKkRtF9zj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 IoCs
  • Unexpected DNS network traffic destination 3 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 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tuc5.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc5.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Users\Admin\AppData\Local\Temp\is-AHCI3.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-AHCI3.tmp\tuc5.tmp" /SL5="$40016,6950053,68096,C:\Users\Admin\AppData\Local\Temp\tuc5.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:1452
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:1500
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
          3⤵
          • Executes dropped EXE
          PID:1164
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1224
    • C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 helpmsg 11
      1⤵
        PID:1252

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        476KB

        MD5

        e937d4a0f403cfff0517099b95192e3f

        SHA1

        ff1836566f3662d9af6773221fc1cefcad925e85

        SHA256

        8cf8f58e2627f4ae5aff0bfd1102580bb556016fedc9128d3653b54a7209d7fe

        SHA512

        d3dade5cb67353d4cca65582f34bcb6e6d016e470b12148a7f8e21d57d7411d0e3caf90923ed40009f82043c1dd99c9d79f76b47271579e1508269e8683349fd

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

        Filesize

        408KB

        MD5

        0ad03b17038c67f87bb33378fbbc0e5c

        SHA1

        fa7eb0d5644cc48c694fe48daf4d81395f77b8f0

        SHA256

        2a1f56be9df6c178ac6b6bfa6eb987d366a7b7654a8d135ecaf5eab9c5e2948c

        SHA512

        7679c9e6c165147ffb12f556708625c497548322a9428d1720bd6b865ede687dc7d9f6d936f9bed1751ff93c98977cc928a551b62f7478db00a3cd9108327aa4

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

        Filesize

        238KB

        MD5

        51606d33e9f47ce9ccf6aba662a7662c

        SHA1

        b5031c32c7c4700a8375f98997288a944e96d87b

        SHA256

        1133b1a036dc6a2fd3a4931ca9f3606f9291aa49a4486078e2a20f14ec7809ed

        SHA512

        43cc506b97b87b1def123c9c755a089ac5ed1dbbd27ca153fec691347fdd56384c57adfe80f6b5ac029cd0ee6e4a72c882c823bc52ecfcbbbaa3bebebc41ae54

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

        Filesize

        1.5MB

        MD5

        d799b624816f1e7d077e7fea7cf8aa61

        SHA1

        35ecde90987376fcaa1b3f1c4433ffd19607b6f9

        SHA256

        397300c9a91de79d4a2e0a02fdd01fdd46d805192b29a980143e438d478c9c3c

        SHA512

        b87763ee29578fdc51d9bda9fe5ff7ae9c3900543ef89b7457c432f975c428d969cb94e2ef6ee1a34b828b12bdf1ce170ec4962c7f671c28f12e794d3de5d656

      • \Users\Admin\AppData\Local\Temp\is-8PKHM.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • \Users\Admin\AppData\Local\Temp\is-8PKHM.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • \Users\Admin\AppData\Local\Temp\is-8PKHM.tmp\_isetup\_shfoldr.dll

        Filesize

        22KB

        MD5

        92dc6ef532fbb4a5c3201469a5b5eb63

        SHA1

        3e89ff837147c16b4e41c30d6c796374e0b8e62c

        SHA256

        9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

        SHA512

        9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

      • \Users\Admin\AppData\Local\Temp\is-AHCI3.tmp\tuc5.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/1164-177-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-194-0x0000000002940000-0x00000000029DE000-memory.dmp

        Filesize

        632KB

      • memory/1164-203-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-209-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-197-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-212-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-200-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-160-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-162-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-206-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-193-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-165-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-190-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-187-0x0000000002940000-0x00000000029DE000-memory.dmp

        Filesize

        632KB

      • memory/1164-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-171-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-174-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-184-0x0000000002940000-0x00000000029DE000-memory.dmp

        Filesize

        632KB

      • memory/1164-180-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1164-183-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1500-153-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1500-154-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1500-157-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1500-158-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1988-163-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1988-1-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2748-167-0x0000000003850000-0x0000000003A1F000-memory.dmp

        Filesize

        1.8MB

      • memory/2748-166-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2748-164-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/2748-151-0x0000000003850000-0x0000000003A1F000-memory.dmp

        Filesize

        1.8MB

      • memory/2748-8-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB