Analysis

  • max time kernel
    140s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-01-2025 01:18

General

  • Target

    9d8ae49163d35db4d97847daffced4f391beccc963eb052420602dceb7edbb45.exe

  • Size

    1.4MB

  • MD5

    ea80486d454b54f865101542a8829201

  • SHA1

    8fae0f5f19bd77d18a123897c929efcee4b5f290

  • SHA256

    9d8ae49163d35db4d97847daffced4f391beccc963eb052420602dceb7edbb45

  • SHA512

    1cb99bc32bc52d7b814833cac5a8b11749e5174668dd18a4488db44fe968df58018f1f84c89b8262d37a8a6234c56b1e2b13f7d61892e11ee0d4f587cda99f34

  • SSDEEP

    24576:vD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJlH8:vF+QrFUBgq25eK/8

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.

  • Remcos family
  • 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\9d8ae49163d35db4d97847daffced4f391beccc963eb052420602dceb7edbb45.exe
    "C:\Users\Admin\AppData\Local\Temp\9d8ae49163d35db4d97847daffced4f391beccc963eb052420602dceb7edbb45.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:2716
    • 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:2648
      • 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:628

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    342B

    MD5

    772fdc78d358c3ed23195d017cba57d6

    SHA1

    db8c9a02788255ca6f588414bc0898fd49127934

    SHA256

    13bdc155d1d389df618938fb47d42815cdaa4f0aa38988073678c3ff62662ff4

    SHA512

    a33a2c7382e5ceaae0205abec4c245573084b593323b36198118b5b0ac82eadb8a2d6fba812163657fd5c3ffa30aa0d95c41ff242b82483f3bad66a79aaceb6c

  • C:\Users\Admin\AppData\Local\Temp\Cab7B29.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

    Filesize

    1.4MB

    MD5

    4f564370501ccc25538bb90137e58021

    SHA1

    66ac6ac7d5d0d0f951719581d98a04c592fc5aa9

    SHA256

    4d91925400a6196c61cf0f4a391af526a08e641bcf7509b03ab328574169c081

    SHA512

    6caf5f42dafa36403ae1ea6c953aba3ddebde3e68f605f8ee139eed802a682e0d313c9c37413beb94efa65e5a73b74673cc36f6af172aa1e2f2e3f7b1b42514e

  • memory/628-58-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-57-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-45-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-47-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-52-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/628-48-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-61-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-62-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-50-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-51-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/628-54-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2648-43-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2648-44-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2648-33-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2648-34-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2648-63-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-0-0x0000000074081000-0x0000000074082000-memory.dmp

    Filesize

    4KB

  • memory/2716-32-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-25-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-13-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-12-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-2-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB

  • memory/2716-1-0x0000000074080000-0x000000007462B000-memory.dmp

    Filesize

    5.7MB