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Analysis

  • max time kernel
    142s
  • max time network
    148s
  • 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, 20:42

General

  • Target

    tuc5.exe

  • Size

    6.9MB

  • MD5

    b4336ca6bab18f9d3521804993eeefd9

  • SHA1

    1f35615eef691d59ccdbde87bd02f7a6d5fc40c5

  • SHA256

    477959c8aecaf3cd9d0e105024d647b936d9595bf726a33d82f5df7990e36921

  • SHA512

    f3d8f4cf595273203a7d15f55d491af64d520bfefb020254b318eed657d9790c5308a32fb4624d23c2469da35358f9770d5a9f1c1f716fee8c2038fc3bec0222

  • SSDEEP

    196608:IxnTNzjsOzc7TGHscDgcXbIdslX38dgFYJzj:gNztzQlcDPXus98d9Jzj

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Unexpected DNS network traffic destination 1 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\tuc5.exe
    "C:\Users\Admin\AppData\Local\Temp\tuc5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1336
    • C:\Users\Admin\AppData\Local\Temp\is-N6TM3.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-N6TM3.tmp\tuc5.tmp" /SL5="$B0068,7025884,54272,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:4812
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:4024
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -i
          3⤵
          • Executes dropped EXE
          PID:2720
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -s
          3⤵
          • Executes dropped EXE
          PID:2012
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 10
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3900
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 10
            4⤵
              PID:2632

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\CRTGame\crtgame.exe

        Filesize

        983KB

        MD5

        b7a575b2b58ccb1ea74b32a5dc9054bb

        SHA1

        82565affb2bfe3998e6c8d0ac031a41029908f36

        SHA256

        d7c8e88962a7fffb8b23ec55f93426778b4f1843660b99c1f96faa5cd62e3298

        SHA512

        0934a3b76f4cb28287d0e6679fc75336868c4350b9f16d3ebc173a5fb0c243c09755d2d6d391bae9fa18036b04cfef1084838f3b14b00c9948d4e77a85bf4219

      • C:\Program Files (x86)\CRTGame\crtgame.exe

        Filesize

        469KB

        MD5

        909af50d0fec3e53df90b926aa2bb94f

        SHA1

        0968be2ad7318f3107d758812587e3d53a045431

        SHA256

        fb45e93379b11bd6a4d2f30da150a022c9f27e2885b9643f9f0f68dfc56aa92e

        SHA512

        ebb10b999e3b1d15d51cccff4603a2d336567c9c9a7ed0b7417efeb2e38d72f2f5d1c1c08a5721ed54fe3340f9bc88e322b5dd8a5074e781fa71bd0e015c55a4

      • C:\Program Files (x86)\CRTGame\crtgame.exe

        Filesize

        66KB

        MD5

        f9d5c330f7788511779e1858bd17b4c3

        SHA1

        a42c1631eab2b5dfbbd9d0874a7bf7a4c6d2b878

        SHA256

        8ed70a6fd15002aa541beba5e8f727ce113cc80601923c1c12373d604c8840d3

        SHA512

        5f0da88320d03215244d07e2f3f5828623a679a8e66854e3d22667a8ef00eac02f19b91b9e5ab3583df60ef8f64374307d9d1a48eba592c71fcb964cbcff17bc

      • C:\Users\Admin\AppData\Local\Temp\is-3TQ1A.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • C:\Users\Admin\AppData\Local\Temp\is-3TQ1A.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • C:\Users\Admin\AppData\Local\Temp\is-N6TM3.tmp\tuc5.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • C:\Users\Admin\AppData\Local\Temp\is-N6TM3.tmp\tuc5.tmp

        Filesize

        229KB

        MD5

        a23bd859f089dc69a73c6b4fc9d2fdae

        SHA1

        c4f905a54dbcd50821ec6eb0ceac909ad9a8bb78

        SHA256

        4d653d9a68479d5f935928ae90b349c1adbb6936b452d45a4f036d8e4d9f7955

        SHA512

        b4a358fd646b80d862d2ad3a5a44508c246413452156b6b3d03db89b4b5ac173553af41122352f44848aa6b3db90dd54afdb0c6568a9f668b151c17f66720db1

      • memory/1336-2-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/1336-0-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/1336-160-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/2012-185-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-189-0x0000000000780000-0x0000000000822000-memory.dmp

        Filesize

        648KB

      • memory/2012-208-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-157-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-205-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-159-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-201-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-198-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-162-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-195-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-166-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-167-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-170-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-173-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-176-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-179-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-180-0x0000000000780000-0x0000000000822000-memory.dmp

        Filesize

        648KB

      • memory/2012-192-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2012-188-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2720-155-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2720-151-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2720-152-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/2720-154-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4812-13-0x0000000000750000-0x0000000000751000-memory.dmp

        Filesize

        4KB

      • memory/4812-163-0x0000000000750000-0x0000000000751000-memory.dmp

        Filesize

        4KB

      • memory/4812-161-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB