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Analysis

  • max time kernel
    139s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    23/07/2024, 21:46

General

  • Target

    57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe

  • Size

    1.9MB

  • MD5

    a01fc27f1f56ee7a8803c9ec23516f76

  • SHA1

    5454698bd7f59b0bf6ada7c26e29fcea903caa2a

  • SHA256

    57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee

  • SHA512

    648a557b9f1bca784f3d046541f4f5102640d9ed2d87b854d2720fb35c83f22f0b924d0c71ed3fd8c929b9429fd092cf531e9f8d15be190850ffb63d939f4dee

  • SSDEEP

    24576:OD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYFES7Ns:Op7E+QrFUBgq2aa

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe
    "C:\Users\Admin\AppData\Local\Temp\57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2576
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2744
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:2640

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\CabC439.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

    Filesize

    1.9MB

    MD5

    83d91bc64d3c936e4fdc07e92ac56873

    SHA1

    964c5e5ed8c5dd54d3d22d80f6b991de629e6fb1

    SHA256

    f68ad43d2a8aba558d171b6aa36e9f7e0d98c9ce5f8c24f6f6cc5791fbd97d80

    SHA512

    4a25124ce980ed3b3920171024ec9057e9fd221e5408261cef127075e29eacbc9e13a0c528cd047c2d17781546404134075c8fb3e14b35b2782998ca722ad5b3

  • memory/2576-2-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2576-1-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2576-10-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2576-11-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2576-29-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2576-0-0x0000000074221000-0x0000000074222000-memory.dmp

    Filesize

    4KB

  • memory/2640-41-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-45-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-66-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-63-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-57-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-49-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-53-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-51-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2640-47-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-58-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-43-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-62-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2640-61-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-56-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2744-38-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2744-30-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2744-40-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB

  • memory/2744-39-0x0000000074220000-0x00000000747CB000-memory.dmp

    Filesize

    5.7MB