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Analysis

  • max time kernel
    147s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-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 6 IoCs
  • Unexpected DNS network traffic destination 1 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\tuc3.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc3.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2384
    • C:\Users\Admin\AppData\Local\Temp\is-VTSI1.tmp\tuc3.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VTSI1.tmp\tuc3.tmp" /SL5="$70122,6973457,68096,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:2756
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:1632
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:1616
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1696
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 11
            4⤵
              PID:2116
          • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
            "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
            3⤵
            • Executes dropped EXE
            PID:2120

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        646KB

        MD5

        7d97c14bba81563ad3d642078d1398be

        SHA1

        90ee5f381d9df36b10c941d14b028ec8d28f22f7

        SHA256

        2d21a3f2f4c57e9bb59175bee00f990250390dbff8b8a04e6360659553bb25b1

        SHA512

        178546f5a254ed0cc3530d22a22faa601aa3cef40ec6c045ce48f57137f9abb33bd723d98fa4d1dab31bb431afb6150087f33a1960fc8d750564a8318a91b696

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

        Filesize

        172KB

        MD5

        f715f0ad46ac916f2231f636204358e2

        SHA1

        da32e8fc9a5e9710de82cd488522ecb39ade5164

        SHA256

        bc968f6a8836675377bb047e4e5d6a08fee44ad865b87c36851effbd59c06469

        SHA512

        1cdeb447152284c508581669dd561dde84fcf5f1a6e7cc0fdde7c6e8d0d881b535f97b283ab451f898a4638a780454874ddc74ac9a0d4b5c8af59029ce25f487

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

        Filesize

        20KB

        MD5

        55290823c1e6bfc943b2b1ef445bd8e8

        SHA1

        a84fc932657799498110f9812bfa54978c97ce42

        SHA256

        592e0ec55b5df99a9e9930fc567fd67acaeda76d1836b5837d916fea0463ca37

        SHA512

        ff6cf08fe86a09214a9747842a5be99641203d4a080d991ff263ed4b7e0963be137b1fff0780b15737aaeb108137128ac4eaa4e6c17c301c6ed700d57b258256

      • C:\Users\Admin\AppData\Local\Temp\is-VTSI1.tmp\tuc3.tmp

        Filesize

        290KB

        MD5

        da0eaff9516582ff2a05892a094da2d5

        SHA1

        69a063c8241f240def851f2ef9d7e77ffaea8212

        SHA256

        27f7819a6e6959d2b758511e8c5b5489a38f2ab2507f0abc056873b448aeaa4f

        SHA512

        7b06d21cb8037ec64361bfb6c3753cb76f1c7f84e96890f92a5dbc17a632b692ee1eeecbee70542cad0df9919000314c0babb09e22af5786e9a75af5c1bd692a

      • C:\Users\Admin\AppData\Local\Temp\is-VTSI1.tmp\tuc3.tmp

        Filesize

        437KB

        MD5

        79ab60af5394bf9644120a2bc0244181

        SHA1

        50eea82ec5c0c6aaf8d967c675474e8c0c62fcb6

        SHA256

        df99695210a23d4d82d71610428129d19a664061911db2efb8ea1d6bfb9fdbac

        SHA512

        781cde3b5f3593c6c6d1a5fc0b942a2a04705c1a22cd3329c4bb1fbca8ed1c8b91ee8eb437b9b9c227bd1e183b1aca387ea989c457ee8dd4c6b4a39809c2d037

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

        Filesize

        291KB

        MD5

        eea411e371a4290c3ccb31747761a1db

        SHA1

        f13de829cbe21badad9b29683551c42c87a613dd

        SHA256

        2d367c933d4c4e9b2818a24704b5a60dfafa8dd4ea3a1b8769c5a2db4fdf5f01

        SHA512

        601484668208c648f03e592dd1cf52a0e337e7dfa0f4f792a0e438f363270e86cc721f6a10b5950924a16cba582bfa86ff846d5f494c8d3dccbe4fc1da8e6ef6

      • \Users\Admin\AppData\Local\Temp\is-BC44T.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • \Users\Admin\AppData\Local\Temp\is-BC44T.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • \Users\Admin\AppData\Local\Temp\is-BC44T.tmp\_isetup\_shfoldr.dll

        Filesize

        22KB

        MD5

        92dc6ef532fbb4a5c3201469a5b5eb63

        SHA1

        3e89ff837147c16b4e41c30d6c796374e0b8e62c

        SHA256

        9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

        SHA512

        9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

      • \Users\Admin\AppData\Local\Temp\is-VTSI1.tmp\tuc3.tmp

        Filesize

        569KB

        MD5

        b97067a8c84a7349719f37e2bdaf9cb8

        SHA1

        be426c08beff3484395de9df71a65c8b66ffb55d

        SHA256

        b3e18fe0ab1f82e7057bc8a642f42c376f4c6706aa3caeca48d8d96eb8136c90

        SHA512

        f2e98131b1716c116440454b5657c84e00efc528b9ba025290cdf24a16d307a672ea50d96245963649e0964e742827784ff97ec31b5baa4d997368fe9e996d62

      • memory/1616-152-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1616-157-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1616-153-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/1616-156-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-183-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-192-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-211-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-159-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-161-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-208-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-205-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-202-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-199-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-166-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-169-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-173-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-174-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-177-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-180-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-196-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-184-0x00000000025E0000-0x000000000267E000-memory.dmp

        Filesize

        632KB

      • memory/2120-189-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2120-195-0x00000000025E0000-0x000000000267E000-memory.dmp

        Filesize

        632KB

      • memory/2384-0-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2384-162-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2756-151-0x0000000003520000-0x00000000036EF000-memory.dmp

        Filesize

        1.8MB

      • memory/2756-165-0x0000000003520000-0x00000000036EF000-memory.dmp

        Filesize

        1.8MB

      • memory/2756-164-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2756-163-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/2756-10-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB