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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • 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, 16:45

General

  • Target

    tuc3.exe

  • Size

    7.6MB

  • MD5

    1947966c5cb027a38004295386cb6e3c

  • SHA1

    d550431f0e529b2a2b289df4fbd1c28e77c080ed

  • SHA256

    271fbd21291bc0a1c9b2fd5a6d39628ccce6e4e588487c8124dc2f4f32232ad5

  • SHA512

    919b6b56f340c816903f07faf666bde51348afbd6a4a2582f85eb49a0c7d2691e84b84397390db0e75a287cf4203c2b4695a442fb6b8c227f40f307b4338dc73

  • SSDEEP

    196608:EnnY8NWvGpWTTlm0OxwW+nFnfZsMUdFt30Dzj:EnnY8NELTIrxwlxQWDzj

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:2160
    • C:\Users\Admin\AppData\Local\Temp\is-RV674.tmp\tuc3.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-RV674.tmp\tuc3.tmp" /SL5="$80068,7715663,68096,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:3612
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:744
        • C:\Program Files (x86)\PlayGIF\gifplayer.exe
          "C:\Program Files (x86)\PlayGIF\gifplayer.exe" -i
          3⤵
          • Executes dropped EXE
          PID:776
        • C:\Program Files (x86)\PlayGIF\gifplayer.exe
          "C:\Program Files (x86)\PlayGIF\gifplayer.exe" -s
          3⤵
          • Executes dropped EXE
          PID:3740
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 11
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4084
    • C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 helpmsg 11
      1⤵
        PID:2164

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\PlayGIF\gifplayer.exe

        Filesize

        181KB

        MD5

        0253e49e3740adea55c3377e9b00cdf6

        SHA1

        4d5c02a92b3077fec59c8de6efd5efc1378d4cce

        SHA256

        ddd55ada541730675731faf646488915dd136af7464a486447acde91c0b9c433

        SHA512

        4547887a2d28f897f6ebf19e06d1a34667f23542c22387aaf8c86afa159beedaa598191844d53b599baa0eca1d09559bcc413ad852c957554a6e24ad60541878

      • C:\Program Files (x86)\PlayGIF\gifplayer.exe

        Filesize

        73KB

        MD5

        c446d3474da1cd1ccd88cef37713df02

        SHA1

        9a3e2ddcc3502472fa5547c71bc6da9ebdd89c84

        SHA256

        1f91d7f56a37a743b4e20db7568eae8658930e6d41408fc3c96fdc2f366623c7

        SHA512

        f2b265501477435f84b6a38ab5bdea5f4a9590b1d652df519de04e102299575ef37d600b78cc1e487054a3b913a3e0e62cf845748941730a46b0cb8c10f53fde

      • C:\Program Files (x86)\PlayGIF\gifplayer.exe

        Filesize

        139KB

        MD5

        4064a314e05c499463afc3c49cf8c2bc

        SHA1

        b9e7c541a89ece7a7524bb8ba95d5ba443b46e96

        SHA256

        babfef71b2ee1d79efa4becfa51e58a199915c3ae3254a16aa80dcbf2340db36

        SHA512

        e3ca0cbd24acaba5ffcf48cde654621459b72894d194ed9998d405863ea66c341f770cc107189074dd744204b793befa0e3e9718730a32bc42767b0f6649af2a

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

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • C:\Users\Admin\AppData\Local\Temp\is-RV674.tmp\tuc3.tmp

        Filesize

        616KB

        MD5

        bc249e7afa940b52e2066cb686d0d638

        SHA1

        4c9e9494cb7f256e62fc60d7a5adc8e63fb77414

        SHA256

        6f4078e9154e13a8c00eaebd2dae222e384a0e5456b63f53ac6bf2791818c0c5

        SHA512

        68948d6f8237ea1babff856d0f7167cce7be171266f16dd1d81742b69478732530233b4a4640472884aa85cecc4b292806e4af2121753b221bd1167208a69316

      • C:\Users\Admin\AppData\Local\Temp\is-RV674.tmp\tuc3.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • memory/776-150-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/776-151-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/776-153-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/2160-0-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/2160-158-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/3612-159-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/3612-161-0x0000000000650000-0x0000000000651000-memory.dmp

        Filesize

        4KB

      • memory/3612-10-0x0000000000650000-0x0000000000651000-memory.dmp

        Filesize

        4KB

      • memory/3740-160-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-178-0x0000000000890000-0x000000000092E000-memory.dmp

        Filesize

        632KB

      • memory/3740-156-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-164-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-165-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-168-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-171-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-174-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-177-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-157-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-183-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-186-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-187-0x0000000000890000-0x000000000092E000-memory.dmp

        Filesize

        632KB

      • memory/3740-190-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-193-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-196-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-199-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-202-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB

      • memory/3740-205-0x0000000000400000-0x000000000068F000-memory.dmp

        Filesize

        2.6MB