Analysis

  • max time kernel
    147s
  • max time network
    151s
  • 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, 14:22

General

  • Target

    tuc3.exe

  • Size

    6.9MB

  • MD5

    93a061a4bbab4efd27c7e47d09629eac

  • SHA1

    3ffbc7263d8039202ea372ad956dd7187e138c56

  • SHA256

    46ff17be11d368e4fee688bc6fbc6dcd33cf794408d39605cf343556810a9b09

  • SHA512

    604061374154814aea69bcef4a1e687dd4d152293fd650100d1e6ba297a4796fb019db908e85823b457fdab845fa9117a07942abd85e2e97903bdf68c47e0271

  • SSDEEP

    196608:gW0fKLtr95HARqIrmVY8S50UL8Kj8yTwHvWY3Nzj:gtO/hAPmVNyEWeNzj

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\tuc3.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2256
    • C:\Users\Admin\AppData\Local\Temp\is-H2HDP.tmp\tuc3.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-H2HDP.tmp\tuc3.tmp" /SL5="$110092,6973457,68096,C:\Users\Admin\AppData\Local\Temp\tuc3.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:432
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:5092
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2172
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
          3⤵
          • Executes dropped EXE
          PID:4188
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1240
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 11
            4⤵
              PID:3872

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        1.0MB

        MD5

        bb5f3686ecf860d379f1ed8f5fcf6ef6

        SHA1

        e6a59412fbc7ef390ea987a7528cbab9da01e546

        SHA256

        51b3c30daf3e112435a0664a9382c0219291fb334aad21773657ed5f2c2bb05d

        SHA512

        3a82a9a4c9c498bc25ab62a9313e6cd08f9e603bd6b2d2f908b9c458c4a2bdba237d96501206f0ed14469a7e70752f35af5d266bc8ddd18151f70c11a9e0d46d

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

        Filesize

        1.0MB

        MD5

        cced716efbee87668a97b876b93aafed

        SHA1

        31574d88978912bf835a096afc436ff70f4d36ce

        SHA256

        a0713a4294b34e87610a5444e79d924de04158d6b5995f9e00e4f12067269111

        SHA512

        e0a702c43bcf61dc60bc8d120d34529fa8e8b3dfa1efcedd91788552f1aa9968ab2a4dadd420513f403cd492f64a34b9649ec79f7c19fddae77c72151fc69760

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

        Filesize

        235KB

        MD5

        b6bc84e44476ef95eace852529371a20

        SHA1

        5132e8c4ceda48fbd8861ba9ebfd2419302b94ac

        SHA256

        422786052e7a275004eb51eac7c4ff9d555d1e3004552e85f9cb223da51621ac

        SHA512

        76e2f9081a9bcca87263703ffe3e79b0d38c3f16b5cdd867db9b8bc3a0661e5ce40dc8ef52ae8f295beb5c835ccb3a67eda596e2c6778117165cd3642bf9b4ac

      • C:\Users\Admin\AppData\Local\Temp\is-ENDT7.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • C:\Users\Admin\AppData\Local\Temp\is-ENDT7.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • C:\Users\Admin\AppData\Local\Temp\is-H2HDP.tmp\tuc3.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/432-7-0x0000000000640000-0x0000000000641000-memory.dmp

        Filesize

        4KB

      • memory/432-161-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/432-163-0x0000000000640000-0x0000000000641000-memory.dmp

        Filesize

        4KB

      • memory/2172-152-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2172-151-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2172-154-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2256-2-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2256-0-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2256-160-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/4188-162-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-182-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-157-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-166-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-167-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-173-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-176-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-178-0x00000000007F0000-0x000000000088E000-memory.dmp

        Filesize

        632KB

      • memory/4188-159-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-183-0x00000000007F0000-0x000000000088E000-memory.dmp

        Filesize

        632KB

      • memory/4188-186-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-189-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-190-0x00000000007F0000-0x000000000088E000-memory.dmp

        Filesize

        632KB

      • memory/4188-193-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-196-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-199-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-202-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-205-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/4188-208-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB