Overview

overview

7

Static

static

3

tuc4.exe

windows7-x64

7

tuc4.exe

windows10-2004-x64

7

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
    10/12/2023, 18:49

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General

  • Target
    tuc4.exe
  • Size 6.9MB
  • Sample231210-xgcejsbee8
  • SHA256 00fa2ef0c7b4728f5ccafbf5d122af1f6932f2160fca286f26cb20598fa54532
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10
discovery

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • 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\tuc4.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5092
    • C:\Users\Admin\AppData\Local\Temp\is-SIM35.tmp\tuc4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-SIM35.tmp\tuc4.tmp" /SL5="$601E6,6990755,54272,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:1616
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:2124
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -i
          3⤵
          • Executes dropped EXE
          PID:4296
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 10
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1996
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 10
            4⤵
              PID:1884
          • C:\Program Files (x86)\CRTGame\crtgame.exe
            "C:\Program Files (x86)\CRTGame\crtgame.exe" -s
            3⤵
            • Executes dropped EXE
            PID:2376

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            crtgame.exe
            • Path C:\Program Files (x86)\CRTGame\crtgame.exe
            • Size 163KB
            • SHA256 1923d3c183a6bb1b6d2949a3043353b9e2c90013f75313d9f2b5f999a28295c8
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            crtgame.exe
            • Path C:\Program Files (x86)\CRTGame\crtgame.exe
            • Size 346KB
            • SHA256 327cb30f9ded7e74c93b29aa60aa9ea274d946ac848a32de539a00b8c39fd1d2
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            crtgame.exe
            • Path C:\Program Files (x86)\CRTGame\crtgame.exe
            • Size 107KB
            • SHA256 c6460e65f3415d712143330d24666914c4ddaf60cb1a63fd8a336c9502b5d01b
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            _iscrypt.dll
            • Path C:\Users\Admin\AppData\Local\Temp\is-95A6A.tmp\_isetup\_iscrypt.dll
            • Size 2KB
            • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
            • MD5 SHA1 SHA512
            Submit Download

            _isdecmp.dll
            • Path C:\Users\Admin\AppData\Local\Temp\is-95A6A.tmp\_isetup\_isdecmp.dll
            • Size 19KB
            • SHA256 71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            tuc4.tmp
            • Path C:\Users\Admin\AppData\Local\Temp\is-SIM35.tmp\tuc4.tmp
            • Size 687KB
            • SHA256 7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            memory/1616-7-0x0000000000650000-0x0000000000651000-memory.dmp
            Download

            memory/1616-161-0x0000000000400000-0x00000000004BC000-memory.dmp
            Download

            memory/2376-158-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/2376-160-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/4296-152-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/4296-151-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/4296-154-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/4296-155-0x0000000000400000-0x000000000061B000-memory.dmp
            Download

            memory/5092-0-0x0000000000400000-0x0000000000414000-memory.dmp
            Download

            memory/5092-2-0x0000000000400000-0x0000000000414000-memory.dmp
            Download

            memory/5092-162-0x0000000000400000-0x0000000000414000-memory.dmp
            Download