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Analysis

  • max time kernel
    146s
  • 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
    12/12/2023, 14:48

General

  • Target

    tuc4.exe

  • Size

    7.1MB

  • MD5

    8c7f92f96f4e26620c1b114ef9a0132f

  • SHA1

    a758538ae1eb4dffcc7ef97186b8468871a41b92

  • SHA256

    398d131ce73ad5291e6fb7f732ee44e8eb1fea05f93f5e421885abe8a54ea18a

  • SHA512

    cde65f7d14b39d80b8b37fea3fb82e7998be09b5aa907d6a8b69d8b62a84e5f955c5c8ae371841a58f2d8ed4ce5b42ee68ab47d41042a3f3dbe3ff6e861eb9e8

  • SSDEEP

    196608:zxm5D5YUyRe7VvZKwamjGKAVW7R+gSoASGm8PvsLMwzj:HRepZKwaS79SoASGDP0Qwzj

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\tuc4.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3732
    • C:\Users\Admin\AppData\Local\Temp\is-DTG34.tmp\tuc4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-DTG34.tmp\tuc4.tmp" /SL5="$6020A,7235080,121856,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:2452
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:3396
        • C:\Program Files (x86)\numGIF\numgif.exe
          "C:\Program Files (x86)\numGIF\numgif.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2300
        • C:\Program Files (x86)\numGIF\numgif.exe
          "C:\Program Files (x86)\numGIF\numgif.exe" -s
          3⤵
          • Executes dropped EXE
          PID:5028
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 12
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4048
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 12
            4⤵
              PID:3208

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Program Files (x86)\numGIF\numgif.exe

        Filesize

        1.9MB

        MD5

        cb1849ffab0ad7ce949f314fd2436f4b

        SHA1

        712478d32d3387b567bab9baa63b660082681722

        SHA256

        179221bda47bc5a97a7ec6accb39baa10715457c6009e769afd79c139712cbde

        SHA512

        dde4c0aa7f2eb4a7aed9db9b40e4c560e18e3d4666849a8f7c40bef9bc1ebe93b7eee79fded6ee09806a1b8f8b9a21511f3d22a4910ab11e07dff22f6a957a28

      • C:\Program Files (x86)\numGIF\numgif.exe

        Filesize

        1.8MB

        MD5

        536507553acd1d52d4672c1a01378500

        SHA1

        ef32954b0c10b7ddaaf75edcef1bdbbdf7d9917c

        SHA256

        7393d1b4167d89d9826f086f79f72b3414209890f40eeeb14032a0bb2733990d

        SHA512

        984ba1a3b1548c9ef20fdb041de28ea799ac5e69a455cc406f5262ecb6cd3ae6266d695710f5f8b732441075e446d97fc93a3199b2c3efbcc179e2487f6bed0d

      • C:\Program Files (x86)\numGIF\numgif.exe

        Filesize

        461KB

        MD5

        3713b67501baa02cc326a6c9e67d37d9

        SHA1

        133d5ff100f70b397f7eefbae69d8b1a6c485f01

        SHA256

        e3967647c8e2732e6d33420c27178e514f2f9a177de833fd5f0c711d83c1f770

        SHA512

        17c9da6c550dbfd5bd3d24d9948ec64cf2c43e6f40cb4a60ddfdfa214a6c0a07478b0dc44e2fd303563ad9cbab484a17291f059318302d52848d7ef102b1b2a4

      • C:\Users\Admin\AppData\Local\Temp\is-9MCA4.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • C:\Users\Admin\AppData\Local\Temp\is-9MCA4.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • C:\Users\Admin\AppData\Local\Temp\is-DTG34.tmp\tuc4.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/2300-154-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2300-155-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2300-151-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2300-152-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2452-163-0x00000000005C0000-0x00000000005C1000-memory.dmp

        Filesize

        4KB

      • memory/2452-161-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/2452-7-0x00000000005C0000-0x00000000005C1000-memory.dmp

        Filesize

        4KB

      • memory/3732-2-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/3732-0-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/3732-160-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/5028-176-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-183-0x0000000000830000-0x00000000008CE000-memory.dmp

        Filesize

        632KB

      • memory/5028-159-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-166-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-167-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-170-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-173-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-157-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-180-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-162-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-179-0x0000000000830000-0x00000000008CE000-memory.dmp

        Filesize

        632KB

      • memory/5028-186-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-189-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-190-0x0000000000830000-0x00000000008CE000-memory.dmp

        Filesize

        632KB

      • memory/5028-193-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-196-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-199-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-202-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-205-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/5028-208-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB