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Analysis

  • max time kernel
    139s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05/10/2024, 02:57

General

  • Target

    c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe

  • Size

    2.2MB

  • MD5

    4cc37ec50a6261f3a3165bf88fd8c4c4

  • SHA1

    471b3058cc49aad6189323676472deae6dee1170

  • SHA256

    c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4

  • SHA512

    99c52e6263afe7960bc59ed56a60ffa248524798338ff61010619129ad17237a9d8402f1b93fce824c9c5f23b0b39ba19db5926dd6bc31634f0c761256fd2e29

  • SSDEEP

    24576:YD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRHM:Yp7E+QrFUBgq2SnJM

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.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 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\c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
    "C:\Users\Admin\AppData\Local\Temp\c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.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:2172
    • 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:2132
      • 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:2848

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\CabEC62.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

    Filesize

    2.2MB

    MD5

    bc47400c3143e985a8116e1e6ddec0f6

    SHA1

    97eeb9328bdcb9d3e550410718a10bec64f61dde

    SHA256

    fbfd6435abad80d06638708316e19dabcc39ba932e161eaf863e158817a02518

    SHA512

    3c17b3920074d4735a678ffe98f93ec89f84c65aa5666fa2d2e14aa985b2f4c35ee581a0c4498f836b3f8d1c4a9aa8aa1ea3f19b8038e5440ae922497e4a8b6f

  • memory/2132-55-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2132-39-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2132-38-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2132-29-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2132-30-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2172-0-0x0000000074DE1000-0x0000000074DE2000-memory.dmp

    Filesize

    4KB

  • memory/2172-10-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2172-28-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2172-9-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2172-1-0x0000000074DE0000-0x000000007538B000-memory.dmp

    Filesize

    5.7MB

  • memory/2848-44-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2848-40-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-46-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-48-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-42-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-52-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-56-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-61-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-57-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-62-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2848-65-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB