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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, 18:56

General

  • Target

    tuc5.exe

  • Size

    6.9MB

  • MD5

    023c01c7c2241e8314ad80e9ee83c19e

  • SHA1

    755ed5d54d67f4b10998fd4d8d1f5c31d1ac187f

  • SHA256

    56ab874cd97a0ad96c97d66f3eb45a58cc2135607df463231d5e44ece00ecbe1

  • SHA512

    545be8f43f569defb2f961113e7cd9efacbff4a3eb49735a9a226119ecd8b55ed909061dfbce56765f8882d8b74428e4168455ff836a768e31a3ab2151ace963

  • SSDEEP

    196608:rxnTNzjsOzc7TGHscDgcXbIdslX38dgFYJzj:BNztzQlcDPXus98d9Jzj

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:4828
    • C:\Users\Admin\AppData\Local\Temp\is-F5SS8.tmp\tuc5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-F5SS8.tmp\tuc5.tmp" /SL5="$D0030,7025884,54272,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:4640
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\system32\schtasks.exe" /Query
        3⤵
          PID:5100
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -i
          3⤵
          • Executes dropped EXE
          PID:3472
        • C:\Program Files (x86)\CRTGame\crtgame.exe
          "C:\Program Files (x86)\CRTGame\crtgame.exe" -s
          3⤵
          • Executes dropped EXE
          PID:4168
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" helpmsg 10
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:5116
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 helpmsg 10
            4⤵
              PID:2244

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        1.1MB

        MD5

        b3846cd01146bebce4a252663ddafa91

        SHA1

        88be480b2a95390c6d6beb56006ea11deeb551f3

        SHA256

        b816b287ed2cc3891828848ec1a26559f6b24b0de8bd438a7d716d94aaf7505d

        SHA512

        5e46c77f8dcb05429d05aaf8edb44df36ed71fe00cccc8e02cfed542d9ee8bbde22294f120fd176b9f05e7ff7e0d1654076346d0bde5bed9bc174b3b46bfcbbf

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

        Filesize

        832KB

        MD5

        bbe02efbfa5df6a7246ea5779bbd0cd2

        SHA1

        317603475650d65091cd1efff32c786c7f3a0a60

        SHA256

        edb66d143cf84c600f28bf96fbcb007e46c81ccece10db2a5affe8475d78d391

        SHA512

        57a63fc340070c4fdd1237f7e7db1cb67d65ef7336e0a7b191290398a601bce3f9b65908d1aae024a73104ec661a1f49c1e0f826be585f7fd1c0ecce6487a6ef

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

        Filesize

        1.0MB

        MD5

        8b27669804775e844d9817f5141f59fe

        SHA1

        7ff3330af35668bf341731e140db4f0082df74db

        SHA256

        9f332057d46d0c4c65311d71a7ddffb6a8cfb4ad803e4e1c9a228a5e98c76dcb

        SHA512

        e72f433b0bd05f6bef4124cac7702076b7ca6e70b3c423ac5a1b331da02195faaa74c75260f8b6c3b7230f5968b7872f2f35a9511fcd3963d979e74b068381df

      • C:\Users\Admin\AppData\Local\Temp\is-F5SS8.tmp\tuc5.tmp

        Filesize

        687KB

        MD5

        f448d7f4b76e5c9c3a4eaff16a8b9b73

        SHA1

        31808f1ffa84c954376975b7cdb0007e6b762488

        SHA256

        7233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49

        SHA512

        f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4

      • C:\Users\Admin\AppData\Local\Temp\is-RSP7F.tmp\_isetup\_iscrypt.dll

        Filesize

        2KB

        MD5

        a69559718ab506675e907fe49deb71e9

        SHA1

        bc8f404ffdb1960b50c12ff9413c893b56f2e36f

        SHA256

        2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

        SHA512

        e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

      • C:\Users\Admin\AppData\Local\Temp\is-RSP7F.tmp\_isetup\_isdecmp.dll

        Filesize

        19KB

        MD5

        3adaa386b671c2df3bae5b39dc093008

        SHA1

        067cf95fbdb922d81db58432c46930f86d23dded

        SHA256

        71cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38

        SHA512

        bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303

      • memory/3472-154-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/3472-155-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/3472-151-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/3472-152-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-161-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-192-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-208-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-158-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-205-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-201-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-198-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-195-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-165-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-166-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-169-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-172-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-175-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-182-0x0000000002810000-0x00000000028B2000-memory.dmp

        Filesize

        648KB

      • memory/4168-181-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-178-0x0000000002810000-0x00000000028B2000-memory.dmp

        Filesize

        648KB

      • memory/4168-185-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-188-0x0000000000400000-0x000000000061E000-memory.dmp

        Filesize

        2.1MB

      • memory/4168-189-0x0000000002810000-0x00000000028B2000-memory.dmp

        Filesize

        648KB

      • memory/4640-13-0x0000000000650000-0x0000000000651000-memory.dmp

        Filesize

        4KB

      • memory/4640-162-0x0000000000650000-0x0000000000651000-memory.dmp

        Filesize

        4KB

      • memory/4640-160-0x0000000000400000-0x00000000004BC000-memory.dmp

        Filesize

        752KB

      • memory/4828-0-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/4828-159-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/4828-2-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB