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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231201-en
  • resource tags

    arch:x64arch:x86image:win7-20231201-enlocale:en-usos:windows7-x64system
  • submitted
    12/12/2023, 17:17

General

  • Target

    tuc4.exe

  • Size

    7.1MB

  • MD5

    add86d51b036db3566dd0b43e0c09a6d

  • SHA1

    51e42c7982d846b90619fb8b41b1855802def854

  • SHA256

    9adc96b2873039384b1c7cebdfa9f92d09786c2c4a0386cac0444980c784281a

  • SHA512

    d8087e242e230e15bf88b84095e07bdebec46cab95df35f4f5791e3bb6c8bb060d7ff5768f5d28dd03ce23061b0abcf87b1f0ed1edde1b731e5ba48392d7e033

  • SSDEEP

    196608:Kxm5D5YUyRe7VvZKwamjGKAVW7R+gSoASGm8PvsLMwzj:MRepZKwaS79SoASGDP0Qwzj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 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 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tuc4.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc4.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2052
    • C:\Users\Admin\AppData\Local\Temp\is-T31RF.tmp\tuc4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-T31RF.tmp\tuc4.tmp" /SL5="$30136,7235080,121856,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:1304
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:1856
        • C:\Program Files (x86)\numGIF\numgif.exe
          "C:\Program Files (x86)\numGIF\numgif.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2236
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 12
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1680
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 12
            4⤵
              PID:1640
          • C:\Program Files (x86)\numGIF\numgif.exe
            "C:\Program Files (x86)\numGIF\numgif.exe" -s
            3⤵
            • Executes dropped EXE
            PID:1592

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        808KB

        MD5

        66ce1a334fa7ccdc1635f2bb30fcad1d

        SHA1

        383c500c197ace6675aaaa28b6c7a9d527b92dd2

        SHA256

        4d3770b4e7aa8f2f36dd1955b54271df0da0c8d7ac8b7c5c8ffeb4fed16e60a1

        SHA512

        7fd1820f14c1d152983825c7cc6f218f796ec9343b05c2027e1dc921e92946dade757136ed55e2e9334ab6991498efe907b5a430f3219d2db2ce3c39045c6541

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

        Filesize

        325KB

        MD5

        e51684fd134ddc0a14beaa42b2eefe81

        SHA1

        4a77d677637b434fc4c42cd10faf9d6d8ff6c7a9

        SHA256

        fab02508a2a5f705f544ef055a66299a1423c4d5f5d34dcab2ee57efc35eca51

        SHA512

        4df4ae780dda70f453ad9963a8167a94b9742cd23f03ca82798826f85739798750626f207bf625b299e2154aefc7ab829998317074526ed48fb7dd0440f5c728

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

        Filesize

        143KB

        MD5

        faeb382473ce3ad54e8fcfb7d19752f3

        SHA1

        480f9c7545a1583b6ae24b3b58dea0a6e20fa754

        SHA256

        28f3b5f86169e559250fdb0936801c855b434c9ff65f189dbc15dcbc85c855cb

        SHA512

        e578dfc211b3d84b3f0faeb473cb14e26822cb4d4a5720b23e118dfa9a3b1f76cab57597decb4f78f8ffa7d554cd19b21a316916e20ff999bbe6453a4d44c6e5

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

        Filesize

        1.7MB

        MD5

        e0b7778112e8ccbe497ca913b0ea310a

        SHA1

        b75663eed3050517563a3a1581a13689f886f912

        SHA256

        4839219158e83fc36dd8ef1e9aea4b9195b4d4dcd4ee84850a42628dbc5a57b2

        SHA512

        137a9e71216c4cd1042399efa49fc54e697be6f880306a854b37cb6c26abf8b1b71cfaaa915deaa3e191559d059697933f6335f0b48372fb1baa0e56125f6d53

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

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

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

        Filesize

        22KB

        MD5

        92dc6ef532fbb4a5c3201469a5b5eb63

        SHA1

        3e89ff837147c16b4e41c30d6c796374e0b8e62c

        SHA256

        9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

        SHA512

        9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

      • \Users\Admin\AppData\Local\Temp\is-T31RF.tmp\tuc4.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/1304-11-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/1304-152-0x0000000003760000-0x0000000003989000-memory.dmp

        Filesize

        2.2MB

      • memory/1304-167-0x0000000003760000-0x0000000003989000-memory.dmp

        Filesize

        2.2MB

      • memory/1304-166-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/1304-164-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/1592-162-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-170-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-202-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-196-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-205-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-199-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-165-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-208-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-211-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-160-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-171-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-174-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-177-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-180-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-183-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-184-0x0000000002680000-0x000000000271E000-memory.dmp

        Filesize

        632KB

      • memory/1592-189-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-192-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/1592-193-0x0000000002680000-0x000000000271E000-memory.dmp

        Filesize

        632KB

      • memory/2052-163-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/2052-1-0x0000000000400000-0x0000000000425000-memory.dmp

        Filesize

        148KB

      • memory/2236-158-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2236-157-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2236-154-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB

      • memory/2236-153-0x0000000000400000-0x0000000000629000-memory.dmp

        Filesize

        2.2MB