Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    12-07-2024 13:45

General

  • Target

    Quotation-15-02-2021_PDF.exe

  • Size

    234KB

  • MD5

    2021fec8feb356edbcea0588a270cb6b

  • SHA1

    2e1ff93fe5da8c89508ff5f1aa44d641e25b6823

  • SHA256

    918dede163276d652ee3fc92b2ec93733850b27a31339e6e972536d168990506

  • SHA512

    2598edb08e125bea4016c44385b29c244f24914fdcdc07546c599e3caf68346bd511853ca1422d4ba9019c21c16ccc33201f6495b9c4a22769df1ff33d4d82c2

  • SSDEEP

    3072:yBkfJpRXATwMdFCcM6FbyDiEDlL1UPhrXiTWddkDdvXIYCZ9gn/TOnG7kUeOp+L2:yqjIGQyDid5ryTWdAIRrgrlk++LbH9Et

Malware Config

Extracted

Family

remcos

Version

2.7.2 Pro

Botnet

Excel-logs

C2

103.114.106.35:20987

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Excel.exe

  • copy_folder

    Excel

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Excel

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Excel-KW0C5C

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Excel

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    wikipedia;solitaire;

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quotation-15-02-2021_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\Quotation-15-02-2021_PDF.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:672
    • C:\Users\Admin\AppData\Local\Temp\Quotation-15-02-2021_PDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Quotation-15-02-2021_PDF.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2972
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2736
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Excel\Excel.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:2556
          • C:\Users\Admin\AppData\Roaming\Excel\Excel.exe
            C:\Users\Admin\AppData\Roaming\Excel\Excel.exe
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2624
            • C:\Users\Admin\AppData\Roaming\Excel\Excel.exe
              C:\Users\Admin\AppData\Roaming\Excel\Excel.exe
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of SetWindowsHookEx
              PID:344

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.vbs

    Filesize

    414B

    MD5

    53c0ff348853d6380df0b8c16a03d762

    SHA1

    eda6327849c2c83520e527241156fad9fa634b4a

    SHA256

    358585a15d72ce0478be92c97b940accf7f7717bf77c29967d4a6fa853f879b2

    SHA512

    925c2286fd0a370afa3d91d94b503ed01f77467fd2a13edca2e940ee4e8f9420193c9a70a3af0a8b26e62e6c2bd7cf1911059c273f16dc4bf261d54b0f840737

  • C:\Users\Admin\AppData\Local\Temp\zskwxxud.ket

    Filesize

    128KB

    MD5

    ee820258379f0db08160ef97b38096c3

    SHA1

    faba7ae96beb0df20306e19498ed9b86dd60f17a

    SHA256

    66974e8127fd27bfeefc3d23b8534f394fb9e9b3a7c1d1e1db9081445ff10c6c

    SHA512

    023a6a3420ec43088c692c9d45c7a788560db74c794e869994155761f4c8b6b7ed9f0c1b775eaff7bea17941b11fe251f0d458418e05fe43fb787d782768ea75

  • C:\Users\Admin\AppData\Roaming\Excel\logs.dat

    Filesize

    74B

    MD5

    6f723ee8e9a2a775772dc395c18742e7

    SHA1

    7493aef74cfd13434f36c0545e20f0117ee6fd15

    SHA256

    01d8938d4fc536a152371e07eb6c4ae5e00958460920bca192526f2856c1e53c

    SHA512

    d1df252b7b93d68d3db6a2ec58fbe18e958faa3b9d62c1c354ded44c008ad307c790b6cbf75e0a06c0a5474e6dd32b60c866262e359e3240213ab9db85d59744

  • \Users\Admin\AppData\Local\Temp\0jxlr2n3sx9a9r.dll

    Filesize

    13KB

    MD5

    9ec36c1f7989533c81de064104ea35ab

    SHA1

    9a9f608e7bf4e4f06e4804f7b132939d3ee5654d

    SHA256

    238727a5364853abf73decbd56c4c1e3f3906060e802352b547a296e34dd3646

    SHA512

    bfb31fd814d2069cf529297c9c4ec4b8d6480012ccbc8f0ea013ce750705d953e47f00f6fa625b95c94c1bcde6763612a6055f91a35428eed0f1e16c6b1bb2e7

  • \Users\Admin\AppData\Local\Temp\nso2BB3.tmp\System.dll

    Filesize

    11KB

    MD5

    fccff8cb7a1067e23fd2e2b63971a8e1

    SHA1

    30e2a9e137c1223a78a0f7b0bf96a1c361976d91

    SHA256

    6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

    SHA512

    f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

  • \Users\Admin\AppData\Roaming\Excel\Excel.exe

    Filesize

    234KB

    MD5

    2021fec8feb356edbcea0588a270cb6b

    SHA1

    2e1ff93fe5da8c89508ff5f1aa44d641e25b6823

    SHA256

    918dede163276d652ee3fc92b2ec93733850b27a31339e6e972536d168990506

    SHA512

    2598edb08e125bea4016c44385b29c244f24914fdcdc07546c599e3caf68346bd511853ca1422d4ba9019c21c16ccc33201f6495b9c4a22769df1ff33d4d82c2

  • memory/344-50-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-63-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-81-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-75-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-71-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-66-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-59-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-53-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-55-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/344-48-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/672-11-0x0000000074220000-0x0000000074228000-memory.dmp

    Filesize

    32KB

  • memory/672-16-0x0000000074220000-0x0000000074228000-memory.dmp

    Filesize

    32KB

  • memory/2624-49-0x0000000074200000-0x0000000074208000-memory.dmp

    Filesize

    32KB

  • memory/2624-44-0x0000000074200000-0x0000000074208000-memory.dmp

    Filesize

    32KB

  • memory/2972-14-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/2972-25-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/2972-17-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/2972-20-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB