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Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231130-en
  • resource tags

    arch:x64arch:x86image:win7-20231130-enlocale:en-usos:windows7-x64system
  • submitted
    11/12/2023, 14:54

General

  • Target

    tuc5.exe

  • Size

    6.9MB

  • MD5

    b9f70e3b68dbd26c2f8a39735532e39f

  • SHA1

    a11081efd75976cd69dd5de50450f659db838ba5

  • SHA256

    6d3d179cfe96e51c906509d7d4c593eacb89e629a74f004092531a07de934841

  • SHA512

    43920312ab8a9fbce0761205bb9a3eea4bcb81fed16ee3cb178de738c761d972408ca64c87e88131808de43ec2854b3ad193ac8de5a3d7a7932be954b9c561da

  • SSDEEP

    196608:6xOlhkHxfDumIwWJfU1IzKkGjAqiuGIqOg9zj:pjkHxfKTnJjzKkRtF9zj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 IoCs
  • Unexpected DNS network traffic destination 2 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\tuc5.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc5.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2552
    • C:\Users\Admin\AppData\Local\Temp\is-K3P6U.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-K3P6U.tmp\tuc5.tmp" /SL5="$3012E,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:2948
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:2700
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2832
        • C:\Program Files (x86)\ConvertWMA\wmaconvert.exe
          "C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s
          3⤵
          • Executes dropped EXE
          PID:2792
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1540
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 11
            4⤵
              PID:2332

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        1.1MB

        MD5

        8b090ab5ca38506103b72bab2d69ee8c

        SHA1

        284b903cda467ff7d16e098dcd87aee88a21050a

        SHA256

        0ca881146bc2e19707a33b344d25a78f414dc2bac52f0425bac04dc3fbee8018

        SHA512

        944b8295dd8f559cd8afb2bf8b101669d36fe6b174690be45b46676723d1d4d3d4790518fd5f1b976dd6fcc9a28f4bc5242738fc78ba43d314642e02fec16c21

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

        Filesize

        864KB

        MD5

        34368818c44159905dd0e44994e19cb0

        SHA1

        97b9a52a1c8c43338abdbedffdde897f9f24f8b9

        SHA256

        1563665a193c826c214846e7e1446f7a881cd57ccba927476ee2ea5b3b178828

        SHA512

        31d55bc7a250f35066be5224db86be64746a3d733b4b92cab0ef67a51fd0ca377eb7041138102b9ba30e7c19a4fa41117bad8a7906c138c7221db626613adc06

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

        Filesize

        1.8MB

        MD5

        31a67cb10577d20a96937eec6a9b99bd

        SHA1

        a861888ce00888370a85dc2c7925fb4178aa7a2c

        SHA256

        3db1a59d28b184bacc5ac11a362e5c5293118f5bc7948d51def377474def7ff4

        SHA512

        0ca7b34bdee6a0a12feed7be7bf11cca882233353ae382d221a856007d3a396e73d95f230eab7fb2e1e4e361caee8c6b09cf9a3dd5007b732869f8f63f2b8839

      • \Users\Admin\AppData\Local\Temp\is-2E5AH.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • \Users\Admin\AppData\Local\Temp\is-2E5AH.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • \Users\Admin\AppData\Local\Temp\is-2E5AH.tmp\_isetup\_shfoldr.dll

        Filesize

        22KB

        MD5

        92dc6ef532fbb4a5c3201469a5b5eb63

        SHA1

        3e89ff837147c16b4e41c30d6c796374e0b8e62c

        SHA256

        9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

        SHA512

        9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

      • \Users\Admin\AppData\Local\Temp\is-K3P6U.tmp\tuc5.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/2552-1-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2552-163-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2792-188-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-191-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-210-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-207-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-204-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-160-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-162-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-201-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-198-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-165-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-195-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-169-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-170-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-173-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-176-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-179-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-182-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2792-183-0x0000000002950000-0x00000000029EE000-memory.dmp

        Filesize

        632KB

      • memory/2792-192-0x0000000002950000-0x00000000029EE000-memory.dmp

        Filesize

        632KB

      • memory/2832-154-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2832-153-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2832-158-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2832-157-0x0000000000400000-0x00000000005CF000-memory.dmp

        Filesize

        1.8MB

      • memory/2948-11-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2948-166-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2948-152-0x00000000038F0000-0x0000000003ABF000-memory.dmp

        Filesize

        1.8MB

      • memory/2948-164-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB