Overview

overview

10

Static

static

10

8bebd7cc51...71.exe

windows7-x64

10

8bebd7cc51...71.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 12:39

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General

  • Target

    8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71.exe

  • Size

    100KB

  • MD5

    a6a0219b8024a45895471d2373df0705

  • SHA1

    e59e9f9290097c827263db55b8896c0401234d1f

  • SHA256

    8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71

  • SHA512

    c1bd154651600eec5b9bb4bdd70b99fa3a6850139d7581ece14998b3a4c2228f8c20db294d2d2366fc18935ae2cf8adbcb561f4f280cf4d841cbd30b5c0b894c

  • SSDEEP

    3072:vhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+JP/P67ro:vhzOv2fM13jsIFSHNT7P/P63o

Score
10/10
remcoshostevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

185.241.208.113:2404

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    JavaUpdate.exe

  • copy_folder

    JavaUpdater

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Java

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_fcstxhoeka

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    Java Updater

  • 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
  • UAC bypass 3 TTPs 3 IoCs
    evasiontrojan
  • 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).

  • Modifies registry key 1 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71.exe
    "C:\Users\Admin\AppData\Local\Temp\8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies WinLogon
    • Suspicious use of WriteProcessMemory
    PID:4576
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3536
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • Modifies registry key
        PID:2740
    • 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:2924
      • C:\Windows\SysWOW64\PING.EXE
        PING 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1664
      • C:\Users\Admin\AppData\Roaming\JavaUpdater\JavaUpdate.exe
        "C:\Users\Admin\AppData\Roaming\JavaUpdater\JavaUpdate.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:1000
        • C:\Windows\SysWOW64\cmd.exe
          /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4124
          • C:\Windows\SysWOW64\reg.exe
            C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • UAC bypass
            • Modifies registry key
            PID:2152
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
          4⤵
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:3440
          • C:\Windows\SysWOW64\cmd.exe
            /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:4552
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • UAC bypass
              • Modifies registry key
              PID:3276

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

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Defense Evasion

Modify Registry

5
T1112

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

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

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Downloads

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

    218B

    MD5

    2ec57f4b54ce5465d19b056bf856fbd0

    SHA1

    589fcd5278b3875888764f2b718da6b5ed899d4c

    SHA256

    2ebe9e31b91bf05aee177a0c8927016b78004445fd581f45e916ffd2adf26753

    SHA512

    4242c08c6bb461f83c4d0e6cee120efc293e319ab720879ae269c776ed43452506838af76bbb174f24a643b26770729fb68f42ea231c14383537694435ec123d

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  • C:\Users\Admin\AppData\Roaming\JavaUpdater\JavaUpdate.exe
    Filesize

    100KB

    MD5

    a6a0219b8024a45895471d2373df0705

    SHA1

    e59e9f9290097c827263db55b8896c0401234d1f

    SHA256

    8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71

    SHA512

    c1bd154651600eec5b9bb4bdd70b99fa3a6850139d7581ece14998b3a4c2228f8c20db294d2d2366fc18935ae2cf8adbcb561f4f280cf4d841cbd30b5c0b894c

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  • memory/3440-9-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

    Download