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Analysis

  • max time kernel
    150s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    28/12/2023, 20:58

General

  • Target

    f7b84056010c17b76758baae378231a5.exe

  • Size

    512KB

  • MD5

    f7b84056010c17b76758baae378231a5

  • SHA1

    df1f5295f8af8e8fcdfc5b011949023e90b90a29

  • SHA256

    34dca36204a623fccda55c58c323819633dc0b99e1f887bc06594de5d101519e

  • SHA512

    30df6c409c049b0e79a14cc2b1f6194374a620b3ffb7318b2eb2d4836b02d894f7a0a83d9fdee6130988d446affabc89ec5e506d4323565dd3e991ded20f5ddd

  • SSDEEP

    6144:1VY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bcodj6E:1gDhdkq5BCoC5LfWSLTUQpr2Zu19Qm5X

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 5 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
  • 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.

  • Windows security modification 2 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • 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
  • AutoIT Executable 9 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 14 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
  • 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 37 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\f7b84056010c17b76758baae378231a5.exe
    "C:\Users\Admin\AppData\Local\Temp\f7b84056010c17b76758baae378231a5.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:1728
    • C:\Windows\SysWOW64\twciyzcuvg.exe
      twciyzcuvg.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:1832
      • C:\Windows\SysWOW64\lmjmreyd.exe
        C:\Windows\system32\lmjmreyd.exe
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2592
    • C:\Windows\SysWOW64\wwkpierwqsljfjc.exe
      wwkpierwqsljfjc.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2152
    • C:\Windows\SysWOW64\lmjmreyd.exe
      lmjmreyd.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:1516
    • 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
      PID:2860
    • C:\Windows\SysWOW64\jstbzfqkjhtbt.exe
      jstbzfqkjhtbt.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2680
  • 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:2032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\Documents\InvokeUndo.doc.exe

    Filesize

    512KB

    MD5

    5b6b929fc08d001a1e0d4cb58561604c

    SHA1

    5f4d2cbd8b7519107e11f4f8419f63e4bc5fb4a0

    SHA256

    090c132657b88459cc618674eb4d4a955b7006fa6404b195da956916c35780d7

    SHA512

    32e31dd82d068842b975b79ec0dc7b651be0f0d319c72f9637d7e67ea9bb9d2143d65af21ccb6ab591af80b89fbde5f4dcb27a96b8ec8a59b8dab9a1f78080e2

  • C:\Users\Admin\Downloads\BlockReset.doc.exe

    Filesize

    512KB

    MD5

    43f17f4f04252253c6c1d2ea3133a5fd

    SHA1

    b737b70e21df824c66b5b7b006d310f5dd8b0250

    SHA256

    187164914f3be5030f6767620bb837443b3d69230ce68c1d1a0673c6ab89ba4f

    SHA512

    edc0c36006375af2dc3953db4b0273aa3695f6edc281e34ac2e8ba86595239d0ff350fb8af65d82c3aecf80ce6f7466cad7f7c3f3ccb9c99317bb54e5313bdc2

  • C:\Windows\SysWOW64\lmjmreyd.exe

    Filesize

    92KB

    MD5

    6662b185f19fbf697c56a25c92de7961

    SHA1

    0df0c0df0de3724258df2549c583e3c934aca726

    SHA256

    c11edb9e97848e20319fba876d9382c7193f68323eff1f7ed805bb04303bdc86

    SHA512

    c6e2cb83f68a63ca299dae843d2697d41dab8b565fb4005755b0d255b388779b6c1dad97375009c995f0a3d2e0acb4cc820090ca5dc24ee11e1a3de5b1a4921f

  • C:\Windows\SysWOW64\lmjmreyd.exe

    Filesize

    384KB

    MD5

    0e151ec3919b72f9a6c7fe60d10f4ea0

    SHA1

    91fb01badc6db9808233ff95abf39c37982a8c85

    SHA256

    f644299fe8f10c5f3e24c1943fc808270b5d4f853e2316abf091c8d18344193c

    SHA512

    41d25f82ce04a14c21d19a9ad2d12663714221b6ecb1c3ee579a4a134949de0bfb3e6212e9acf97d0659d50e7a034dcdc103ecbedd8a71fbfefdc30f5728c12b

  • C:\Windows\SysWOW64\wwkpierwqsljfjc.exe

    Filesize

    512KB

    MD5

    145ffcc242c6c09dd37bea274aeb4f93

    SHA1

    c5e4da2c92b1cd4ad2bf2bf6094a86606b75d5ee

    SHA256

    b0bc123e5daa989684aa5ca35e9fea6c1a644dc9bcdc73fd73ec28a240452dbf

    SHA512

    efbc9d644ce71544a6bcf5e0b7376cbce2cfbbcbfac909fbe4ba4fe2fad641835a6fa14d44874ae49074a69df261c879395bcaeec7addc76a985015fb1db05f7

  • C:\Windows\mydoc.rtf

    Filesize

    223B

    MD5

    06604e5941c126e2e7be02c5cd9f62ec

    SHA1

    4eb9fdf8ff4e1e539236002bd363b82c8f8930e1

    SHA256

    85f2405d1f67021a3206faa26f6887932fea71aea070df3efb2902902e2d03e2

    SHA512

    803f5f2fddbf29fef34de184eb35c2311b7a694740983ca10b54ef252dd26cda4987458d2569f441c6dedc3478bea12b45bfd3566f1b256504a0869ad3829df7

  • \Windows\SysWOW64\jstbzfqkjhtbt.exe

    Filesize

    93KB

    MD5

    257f28bd5bdc2b725434b7ab570814e7

    SHA1

    972446e0f8d210c5d6f42a57a921391a236d564d

    SHA256

    d80f45a5995ba038d69dbe87f7c12827ffa2b53e79beedb0bc6ee91c10a61688

    SHA512

    c27aa91c3c3605941a1a121021c840fc7886cf27d43e9d6b2c371888a276d9dfd39135600a4f933f62dfa3d46cb6e12de6e31b3f8b939676701ff37f8cc61575

  • \Windows\SysWOW64\lmjmreyd.exe

    Filesize

    512KB

    MD5

    179592d22754b738100e7d85a21a43e3

    SHA1

    b67a1f547cc79e2ef6e122620756e4040a5e4fea

    SHA256

    10b0eca2bd9b173c3ebbed3b8ceacd8c1f8b03f3a9139eef6e841e0c08825dfa

    SHA512

    e5aca4667657c7fff1565c7204d24647b4ac3524789beeb9e0e09ed43cb5338bbda758cbfd04177317608c923b08f55acb43b71ae5e1736e742e29883da8b9af

  • \Windows\SysWOW64\twciyzcuvg.exe

    Filesize

    512KB

    MD5

    d119633b956c11fa20339c4e9af2e295

    SHA1

    2a7d4fd9e2091c356179ef5b9499e8ec74e996b9

    SHA256

    494823ba9996374acac91b701ad875ce84f276b5b04ac5cba950728285d0618b

    SHA512

    ff1d19cecf82cf25fb39ad0dcba3012c5310b3f5a02cae139b22417df1f4fc3f4d6a517e85140fd3ace9d86e02815b367ab664a789e467614744c4fb5a25b7ed

  • memory/1728-0-0x0000000000400000-0x0000000000496000-memory.dmp

    Filesize

    600KB

  • memory/2032-83-0x00000000041E0000-0x00000000041E1000-memory.dmp

    Filesize

    4KB

  • memory/2032-91-0x0000000002AF0000-0x0000000002B00000-memory.dmp

    Filesize

    64KB

  • memory/2032-85-0x00000000041E0000-0x00000000041E1000-memory.dmp

    Filesize

    4KB

  • memory/2860-45-0x000000002FD11000-0x000000002FD12000-memory.dmp

    Filesize

    4KB

  • memory/2860-84-0x0000000070ECD000-0x0000000070ED8000-memory.dmp

    Filesize

    44KB

  • memory/2860-46-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/2860-47-0x0000000070ECD000-0x0000000070ED8000-memory.dmp

    Filesize

    44KB