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Overview

overview

7

Static

static

3

tuc4.exe

windows7-x64

7

tuc4.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/12/2023, 18:40

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General

  • Target

    tuc4.exe

  • Size

    6.9MB

  • MD5

    e5f9baf2d41dfedc6d946afef0bf4f2a

  • SHA1

    6c7790c9e79645be54a103918d62390589fab135

  • SHA256

    a16840fd50d21d9d6849db446ec7702e96f4f854c1efbf77d6b5698662e98750

  • SHA512

    e6cae330c88ad2b1695b7df3b140d823d2cda40e889c5f18a7ccd66d09a92353f088421476acfd37bb52134095557066d686d67a38d087bd5a41ec9ebac7c376

  • SSDEEP

    98304:KQ+Vxb2IGx8i09D7OWCLPMTeQm5MT1k/lmrpt9l4Rx2UXwDieSC0kWppgK6TrzuG:UVx6OdDqWwWeQm5+kYrMCUX6m7y5Trzj

Score
7/10
discovery

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • 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\tuc4.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2848
    • C:\Users\Admin\AppData\Local\Temp\is-JHKNV.tmp\tuc4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-JHKNV.tmp\tuc4.tmp" /SL5="$900B2,6990755,54272,C:\Users\Admin\AppData\Local\Temp\tuc4.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4044
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:5072
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -i
          3⤵
          • Executes dropped EXE
          PID:1604
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -s
          3⤵
          • Executes dropped EXE
          PID:4716
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 10
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3920
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 10
            4⤵
              PID:2796

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Program Files (x86)\CRTGame\crtgame.exe
        Filesize

        1.2MB

        MD5

        eff3707bae286ca2f766edfaa026173e

        SHA1

        48720215339fc7b5d3a6d13eb81ef99d34d915bf

        SHA256

        25b57b9d56eee0a63842a2410ffa26e64d2341749e01975eca8cb23afcfd3782

        SHA512

        fb60d07adbdb436f7ca748ffcad21dc89336d5ea95899cda28d35ed9c316c7b98c5cb47bf1e6d0f5e4cdb6d8a037b811e6bcc27185a3eed3aabecae8bf0074e6

        Download Submit

      • C:\Program Files (x86)\CRTGame\crtgame.exe
        Filesize

        1.2MB

        MD5

        03c49c98ae10d4ab2b70208f81d9716e

        SHA1

        2b9e144ca87f107879fa4347eb7fdd845056294c

        SHA256

        4f5dcfe26bc35d76942ea2b2ad325e96ddf8fe17d9f3b46bc6f038c93adac871

        SHA512

        03f879bf8b82ea4fca9d8f4072ffa41fc141a660316443d6c89b307cdbe81667e5a2dbc8c2b5354f570fa8ae8b51f6bd7281f1b4ab501aa78bcce06c9fdeafca

        Download Submit

      • C:\Program Files (x86)\CRTGame\crtgame.exe
        Filesize

        835KB

        MD5

        1e2cf1820de2ac3df794e624d23ad16b

        SHA1

        58e3b8df1e2866dd39c84b40bd74871be1e90553

        SHA256

        2a24bbf4f9b06c540e3dd2a37750052fb48ca74cc3857f6b239d58c33fdcc2ae

        SHA512

        2f26346ed2ba722142cad3f47dd923eb0e306810363855bf5f4f6a4fad6c641551ae89dbadf15fa45a8bb22eade69a5875852b664f569b27866fa38e33f59ed9

        Download Submit

      • C:\Users\Admin\AppData\Local\Temp\is-H6H7D.tmp\_isetup\_iscrypt.dll
        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        Download Submit

      • C:\Users\Admin\AppData\Local\Temp\is-H6H7D.tmp\_isetup\_isdecmp.dll
        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

        Download Submit

      • C:\Users\Admin\AppData\Local\Temp\is-JHKNV.tmp\tuc4.tmp
        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

        Download Submit

      • memory/1604-151-0x0000000000400000-0x000000000061B000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/1604-152-0x0000000000400000-0x000000000061B000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/1604-154-0x0000000000400000-0x000000000061B000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/1604-150-0x0000000000400000-0x000000000061B000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/2848-0-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

        Download

      • memory/2848-160-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

        Download

      • memory/4044-6-0x0000000002200000-0x0000000002201000-memory.dmp

        Filesize

        4KB

        Download

      • memory/4044-159-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

        Download

      • memory/4716-157-0x0000000000400000-0x000000000061B000-memory.dmp

        Filesize

        2.1MB

        Download