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Overview

overview

10

Static

static

5

55db3a5b67...a2.exe

windows7-x64

10

55db3a5b67...a2.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    151s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/12/2023, 04:54

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General

  • Target

    55db3a5b67a35d72f339a90d20c9e5a2.exe

  • Size

    512KB

  • MD5

    55db3a5b67a35d72f339a90d20c9e5a2

  • SHA1

    e0ae31b15dcac213218bda70a20fb41da712f3bd

  • SHA256

    609073641db5b2de72f72b83281e4ecedeb4969ae05836620a94b3f25c396ce3

  • SHA512

    8c110f58bef1d927e47fb7b262b3d41a37d1d683d8193d5b80946112c62ae9d8cf498c9498c079c0c83c414ab1251dc39ae25ed9084dc63cd8d53fcbaaac2c40

  • SSDEEP

    6144:1VY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bcodj6p:1gDhdkq5BCoC5LfWSLTUQpr2Zu19Qm5q

Score
10/10
evasionpersistencespywarestealertrojan

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
    evasion
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
    evasion
  • Windows security bypass 2 TTPs 5 IoCs
    evasiontrojan
  • Disables RegEdit via registry modification 1 IoCs
    evasion
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Windows security modification 2 TTPs 6 IoCs
    evasiontrojan
  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 64 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Modifies WinLogon 2 TTPs 2 IoCs
    persistence
  • AutoIT Executable 9 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 15 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
    adwarespyware
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 47 IoCs
  • Suspicious use of SendNotifyMessage 34 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\55db3a5b67a35d72f339a90d20c9e5a2.exe
    "C:\Users\Admin\AppData\Local\Temp\55db3a5b67a35d72f339a90d20c9e5a2.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1164
    • C:\Windows\SysWOW64\ypdxbmodzf.exe
      ypdxbmodzf.exe
      2⤵
      • Modifies visibility of file extensions in Explorer
      • Modifies visiblity of hidden/system files in Explorer
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Loads dropped DLL
      • Windows security modification
      • Enumerates connected drives
      • Modifies WinLogon
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2152
      • C:\Windows\SysWOW64\ywxifdfd.exe
        C:\Windows\system32\ywxifdfd.exe
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        PID:2868
    • C:\Windows\SysWOW64\prsavxsthzbfuwh.exe
      prsavxsthzbfuwh.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2752
    • C:\Windows\SysWOW64\zwwxlumxdhkis.exe
      zwwxlumxdhkis.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2916
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Windows\mydoc.rtf"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2560
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:1968
      • C:\Windows\SysWOW64\ywxifdfd.exe
        ywxifdfd.exe
        2⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2716
    • C:\Windows\explorer.exe
      explorer.exe
      1⤵
      • Modifies Installed Components in the registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2792

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\Program Files (x86)\Microsoft Office\Office14\1033\PROTTPLN.DOC.exe
      Filesize

      65KB

      MD5

      6b2d87c29e03c1669c86b13f0e329f27

      SHA1

      fc01a8091ad1488013e09ecabcbb34ebb2729a38

      SHA256

      6cb9102f5b672aa60bab941d44dfac6baa33354a6dbff3a6cf1b7e16f4e1c61c

      SHA512

      62a6d356d9d1393f780e7ebef155962a8261e76e5c6df375d5d35484702607996e9334a0a3788cde9ee44d7d6cbfbd284c2163ff4e9837884a0ae5712b1e0272

      Download Submit

    • C:\Windows\SysWOW64\prsavxsthzbfuwh.exe
      Filesize

      92KB

      MD5

      6662b185f19fbf697c56a25c92de7961

      SHA1

      0df0c0df0de3724258df2549c583e3c934aca726

      SHA256

      c11edb9e97848e20319fba876d9382c7193f68323eff1f7ed805bb04303bdc86

      SHA512

      c6e2cb83f68a63ca299dae843d2697d41dab8b565fb4005755b0d255b388779b6c1dad97375009c995f0a3d2e0acb4cc820090ca5dc24ee11e1a3de5b1a4921f

      Download Submit

    • C:\Windows\SysWOW64\ywxifdfd.exe
      Filesize

      381KB

      MD5

      30aec9e0b33fbd99234328357879f812

      SHA1

      3c9d37139d4ccfe2b694afba9633170d0f510a92

      SHA256

      15aad0daaaeea2f1eb8d19a8999f42844b2885d6bef949f6787feba7dad46563

      SHA512

      2060f2cc8c90181dd0a9965f0ff3a94aece08c82c4a68454846f66778bc60dade3ba5ddc38be57311ff4a7bd78217b89a9cd09837eee4b5d9893277299dad415

      Download Submit

    • C:\Windows\SysWOW64\ywxifdfd.exe
      Filesize

      512KB

      MD5

      60ae9f24edd1dc38608231d7a871aaab

      SHA1

      f7129d89466bd4298daec21754998c564e760594

      SHA256

      292d0946d1dd0a4a5a09ee800f51846798be42544c92a4b1ef714efe62309602

      SHA512

      d131c6673eaaddfb6807cdbeac9b5d1850fa333e71680d6d0b309cff50973ef9b05505c55d5503b6392ab4204b0ea62ddb2bb6b2b27b1a49b516627ffd71a8db

      Download Submit

    • C:\Windows\mydoc.rtf
      Filesize

      223B

      MD5

      06604e5941c126e2e7be02c5cd9f62ec

      SHA1

      4eb9fdf8ff4e1e539236002bd363b82c8f8930e1

      SHA256

      85f2405d1f67021a3206faa26f6887932fea71aea070df3efb2902902e2d03e2

      SHA512

      803f5f2fddbf29fef34de184eb35c2311b7a694740983ca10b54ef252dd26cda4987458d2569f441c6dedc3478bea12b45bfd3566f1b256504a0869ad3829df7

      Download Submit

    • \Windows\SysWOW64\prsavxsthzbfuwh.exe
      Filesize

      98KB

      MD5

      609af11fd29d08e54980de8c57a56b23

      SHA1

      e50dccaa3bd6cb5b4793d75239949664c7b7b85c

      SHA256

      263becbbaf456f58f41f0ac5b3d64a9146f02fe787e80917150392fa4b571274

      SHA512

      598fc2efae60327ed354d106300f79ddd327756e93b5afaa7178dde66f28b9326c31b553190840a55c1d1d3b027015fbfe7b8a004564aed9dc1b3ecb184f8586

      Download Submit

    • \Windows\SysWOW64\ypdxbmodzf.exe
      Filesize

      512KB

      MD5

      faa8d67c8537b4bda564b05eaf04d8cc

      SHA1

      c218d4e431fd0135599e24d74a697f54f9f1461e

      SHA256

      5f76ef502b5e3af398883fb49aba117b71e209a90dafbf59a52a4974f730d653

      SHA512

      b7991649f754c3a6e18c1674af29ece2c9c6f555de98e4f049cd97f5a52813827283e5a1284ead0eda8873ce3386c8ea5c692a2376bc0d87c4ee2748b38ab9b2

      Download Submit

    • \Windows\SysWOW64\ywxifdfd.exe
      Filesize

      344KB

      MD5

      1ca7a5979eff8f45ec81c7575be3fce6

      SHA1

      2dd4a286f049b9ef7f8500c6e902aa09fee9ab58

      SHA256

      e13e14a733859036868e9930397a05f08a77da07fca597becf545ad412dd7121

      SHA512

      afa721dd65a5b8bcba7dedb404ac7567062550e592e9f02c74922fef6a228a6ac7def654a802d7247454d0ab9fa86e1bf6b352b435f88cbf746db9754401628a

      Download Submit

    • memory/1164-0-0x0000000000400000-0x0000000000496000-memory.dmp

      Filesize

      600KB

      Download

    • memory/2560-47-0x0000000070F8D000-0x0000000070F98000-memory.dmp

      Filesize

      44KB

      Download

    • memory/2560-46-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2560-45-0x000000002FF91000-0x000000002FF92000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2560-77-0x0000000070F8D000-0x0000000070F98000-memory.dmp

      Filesize

      44KB

      Download

    • memory/2792-74-0x0000000004030000-0x0000000004031000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2792-78-0x0000000004030000-0x0000000004031000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2792-84-0x0000000002730000-0x0000000002740000-memory.dmp

      Filesize

      64KB

      Download