Overview

overview

10

Static

static

1

doc2023020...99.exe

windows7-x64

10

doc2023020...99.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    193s
  • max time network
    198s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/02/2023, 00:31

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General

  • Target
    doc202302089901039991999.exe
  • Size 525KB
  • Sample230211-at2tmsfa74
  • SHA256 4a2002d591a7957dbe2cc2a3b6a8e40ab667966497ddda2c8038ec58233b1fd9
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
remcosremotehostpersistencerat

Malware Config

Extracted

Family

  • remcos

Botnet

  • RemoteHost

C2

  • report1.duckdns.org:5890

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-O5GSXS

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

    ratremcos
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\doc202302089901039991999.exe
    "C:\Users\Admin\AppData\Local\Temp\doc202302089901039991999.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4872
    • C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe
      "C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe" C:\Users\Admin\AppData\Local\Temp\ypdusghagxa.oau
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:4268
      • C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe
        "C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:4768

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        ffbeplfp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe
        • Size 120KB
        • SHA256 a3cdb290594438c7fbbf06625fbacd4fd8e6b889c218ccb0247f2b5a67cb1e12
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        ffbeplfp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe
        • Size 120KB
        • SHA256 a3cdb290594438c7fbbf06625fbacd4fd8e6b889c218ccb0247f2b5a67cb1e12
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        ffbeplfp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ffbeplfp.exe
        • Size 120KB
        • SHA256 a3cdb290594438c7fbbf06625fbacd4fd8e6b889c218ccb0247f2b5a67cb1e12
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        fmyckagre.gfw
        • Path C:\Users\Admin\AppData\Local\Temp\fmyckagre.gfw
        • Size 495KB
        • SHA256 afc5229fd7d4753b9dcb41cd8cad681b5e740b765d3617b8c4f1f9b0881ab92f
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        ypdusghagxa.oau
        • Path C:\Users\Admin\AppData\Local\Temp\ypdusghagxa.oau
        • Size 7KB
        • SHA256 866dc992eaf8c8cbaaccebaa93e06c2c272079aa902caf59b1ba919118949b10
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/4768-139-0x0000000000400000-0x0000000000480000-memory.dmp
        Download

        memory/4768-140-0x0000000000400000-0x0000000000480000-memory.dmp
        Download