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Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/12/2023, 14:04

General

  • Target

    tuc5.exe

  • Size

    6.9MB

  • MD5

    16de34a6ea50a8ff8cb6adfdc527bf4d

  • SHA1

    9e3c64178ccbcff51d8bbc8b01426d2224bf51fb

  • SHA256

    aef134c97f786b44321bc0f55d6509a3ce56eba367d925cc610ac6b6312f4f6b

  • SHA512

    8d519bfb9f26742185c687a82a190908841c4e96b60bd9eb58a9d4a45be9b03f51d043e47927d11110a3d7fcb609b1880a93688aab25f567eb39c259c88a2b77

  • SSDEEP

    196608:3xOlhkHxfDumIwWJfU1IzKkGjAqiuGIqOg9zj:kjkHxfKTnJjzKkRtF9zj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 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 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tuc5.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Users\Admin\AppData\Local\Temp\is-CSNS4.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-CSNS4.tmp\tuc5.tmp" /SL5="$50066,6950053,68096,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:3324
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:4772
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:4448
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
          3⤵
          • Executes dropped EXE
          PID:3020
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3852
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 11
            4⤵
              PID:1644

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        1004KB

        MD5

        7548ce108d191480194317a7106a3a08

        SHA1

        862bbc28f569d96c61bc5b4efd3d70961c79af87

        SHA256

        7ce4b863ae49f5c3eb8e600c597fb0dc58361414c18ac065993de85226c20f2c

        SHA512

        7ea603e6d55f90727ce014d5ab163a6cfa37dc4a6a5ddb322cf1984e3cd3dbf94672aec447bd65ea83f9965946c356ae37993cd7ec5013ace6abec108e6979b3

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

        Filesize

        1.2MB

        MD5

        dc338c278f52ede627a0969f2f400438

        SHA1

        c9f78355090db2494776099666cdbaa906719be2

        SHA256

        a6c803cfb3fcd85143ab076af610d8f76e508ba66eb5bada6202bf363eb303b4

        SHA512

        be693de4b27be42629d9472fb2cf63b6a6cc96ce251ba88af08ff01a6b4bbf2cb1995c8c92f603ed0ccf980d928f860438097d379d13d2c1e4eb8ccab4df3f5e

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

        Filesize

        419KB

        MD5

        24050462fb848899f4666bd93596c1e8

        SHA1

        3980a2659dc8d58064e9cff86558bc13a659fc23

        SHA256

        cae8f57dbedd18ab252b5ddebcad9993058c08c030187e9e17259fa3a39573d6

        SHA512

        cf7e614d85fb7edac3be65622740d02b0b91a6601b0ae187536fb8b228d94c4e73ecc15b2d79a5fd931f0cefc2dab8fb58c9acea59a7efbfd50ef354a36a4a70

      • C:\Users\Admin\AppData\Local\Temp\is-9LOBC.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • C:\Users\Admin\AppData\Local\Temp\is-9LOBC.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • C:\Users\Admin\AppData\Local\Temp\is-CSNS4.tmp\tuc5.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/2876-2-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2876-0-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2876-160-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/3020-159-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-192-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-195-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-201-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-157-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-189-0x0000000000830000-0x00000000008CE000-memory.dmp

        Filesize

        632KB

      • memory/3020-204-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-207-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-162-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-198-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-166-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-167-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-173-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-176-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-180-0x0000000000830000-0x00000000008CE000-memory.dmp

        Filesize

        632KB

      • memory/3020-179-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-185-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3020-188-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/3324-161-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/3324-163-0x0000000002230000-0x0000000002231000-memory.dmp

        Filesize

        4KB

      • memory/3324-13-0x0000000002230000-0x0000000002231000-memory.dmp

        Filesize

        4KB

      • memory/4448-155-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4448-154-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4448-152-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4448-151-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB