Overview

overview

10

Static

static

10

Backdoor.exe

windows7-x64

10

Backdoor.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2024 12:31

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    Backdoor.exe

  • Size

    92KB

  • MD5

    a772f5389d801f4357b55f5b37c535b7

  • SHA1

    0dceee73824ced52e7b629bb71bdb600ff40d9b1

  • SHA256

    7fd4efb371a7d50d723f7dcda4f4d177482eb703fc94664b53dff7bd3f9293ea

  • SHA512

    9b2904f48ea3ba475db2847190e3d106344db4b75abf388db1ebb2bdb3227565c9b36e35d387e3785bf5aebb1bfa657215ad3a09e96e64c03f8072f87cded0f8

  • SSDEEP

    1536:4hhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6Erm:ehzYTGWVvJ8f2v1TbPzuMsIFSHNThy+C

Score
10/10
remcoshostpersistencerat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

26.210.140.6:5552

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

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_fwolaheltvnuwks

  • 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

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
    persistence
  • Remcos

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

    ratremcos
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

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

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Backdoor.exe
    "C:\Users\Admin\AppData\Local\Temp\Backdoor.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies WinLogon
    • Suspicious use of WriteProcessMemory
    PID:4888
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1184
      • C:\Windows\SysWOW64\PING.EXE
        PING 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:3992
      • C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Executes dropped EXE
        • Adds Run key to start application
        • Modifies WinLogon
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3704
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
          4⤵
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          PID:872

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Defense Evasion

Modify Registry

3
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.bat
    Filesize

    99B

    MD5

    76c1687d97dfdbcea62ef1490bec5001

    SHA1

    5f4d1aeafa7d840cde67b76f97416dd68efd1bed

    SHA256

    79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

    SHA512

    da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

    Download Submit
  • C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
    Filesize

    92KB

    MD5

    a772f5389d801f4357b55f5b37c535b7

    SHA1

    0dceee73824ced52e7b629bb71bdb600ff40d9b1

    SHA256

    7fd4efb371a7d50d723f7dcda4f4d177482eb703fc94664b53dff7bd3f9293ea

    SHA512

    9b2904f48ea3ba475db2847190e3d106344db4b75abf388db1ebb2bdb3227565c9b36e35d387e3785bf5aebb1bfa657215ad3a09e96e64c03f8072f87cded0f8

    Download Submit
  • memory/872-8-0x0000000000400000-0x0000000000417000-memory.dmp
    Filesize

    92KB

    Download