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Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    12/12/2023, 15:13

General

  • Target

    tuc5.exe

  • Size

    7.2MB

  • MD5

    bedcb52d0e7989294eed27e5a020864a

  • SHA1

    23f359ac38b020713c26691f6808769d02327ce6

  • SHA256

    83ebc0522cc0f2c4541c38c6924781b38c3ce0cb8564874e2c195e725927a8fe

  • SHA512

    67c2d5445019574d6a70dee6b3a58cdb32d94ddd8267199cb32ed1ab41d1836b923a6f78f058dc14e630e14a84eb8045ceb8f3c8bffd391ee208bbcda532229c

  • SSDEEP

    196608:6xm5MctdEEAJTpMEa66Ey+/xwAB04awWOAQwlCkzj:ccjEEAJWEh65C30GW9lCkzj

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:460
    • C:\Users\Admin\AppData\Local\Temp\is-EVGRU.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-EVGRU.tmp\tuc5.tmp" /SL5="$90156,7269570,121856,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:2328
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:1944
        • C:\Program Files (x86)\numGIF\numgif.exe
          "C:\Program Files (x86)\numGIF\numgif.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2000
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 12
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:580
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 12
            4⤵
              PID:1356
          • C:\Program Files (x86)\numGIF\numgif.exe
            "C:\Program Files (x86)\numGIF\numgif.exe" -s
            3⤵
            • Executes dropped EXE
            PID:268

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        2.1MB

        MD5

        8a9a057f29c3f7f934daaf8b7908a5ad

        SHA1

        69ca85e99c34cdf88db6d9e3baaa7dcfca4477a0

        SHA256

        854e5a5613b69c1598cc9a60c1f01985173a43f9028a99aac95f5c5283b5b3eb

        SHA512

        3184473e21dfb21cd350be659549268d4a05f6e4f480ed2c1a5cb6ed4f875ee797e36af98c1b692eef8aa71531ffad45309dd6c09433d3c366a874e92a4ddef1

      • \Users\Admin\AppData\Local\Temp\is-7D5A3.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • \Users\Admin\AppData\Local\Temp\is-7D5A3.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • \Users\Admin\AppData\Local\Temp\is-7D5A3.tmp\_isetup\_shfoldr.dll

        Filesize

        22KB

        MD5

        92dc6ef532fbb4a5c3201469a5b5eb63

        SHA1

        3e89ff837147c16b4e41c30d6c796374e0b8e62c

        SHA256

        9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

        SHA512

        9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/268-191-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-198-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-216-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-214-0x00000000025D0000-0x000000000266E000-memory.dmp

        Filesize

        632KB

      • memory/268-213-0x00000000025D0000-0x000000000266E000-memory.dmp

        Filesize

        632KB

      • memory/268-210-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-207-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-160-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-162-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-204-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-201-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-197-0x00000000025D0000-0x000000000266E000-memory.dmp

        Filesize

        632KB

      • memory/268-194-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-167-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-170-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-171-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-174-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-175-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-178-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-181-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-184-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/268-186-0x00000000025D0000-0x000000000266E000-memory.dmp

        Filesize

        632KB

      • memory/460-1-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/460-163-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/2000-158-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2000-155-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2000-154-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2000-153-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2328-166-0x0000000003580000-0x00000000037A9000-memory.dmp

        Filesize

        2.2MB

      • memory/2328-165-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2328-8-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2328-164-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/2328-151-0x0000000003580000-0x00000000037A9000-memory.dmp

        Filesize

        2.2MB