Analysis

  • max time kernel
    149s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-11-2022 05:19

General

  • Target

    2022-11-4 报价请求.PDF.exe

  • Size

    1.1MB

  • MD5

    b80414e3202a808673a8254aec607a12

  • SHA1

    fef5c52c3af36689f3c794ce586d83b0a458afa5

  • SHA256

    5c09c1cfdc80893c1a64a68ed969bd26c929c78fb125747ad01064c5b237ad7b

  • SHA512

    3e1a4e4918b2b64238403811348248ff5955793cf405087edaac332461c74ee3d26b21f814565d22ae4f30cc4436821ac7f9fcdc61cae38d1ce8adf3ff2609b3

  • SSDEEP

    24576:ZH14Ct7BwWTmQHsOzj4j85M1hUQDAxzJX4K4hGxosG:ZHGW7BwWtsOzj4jGM1aK4FX3

Malware Config

Extracted

Family

remcos

Botnet

NEW REM STUB

C2

valvesco.duckdns.org:5050

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-48V73L

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Remcos

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

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2022-11-4 报价请求.PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\2022-11-4 报价请求.PDF.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3736
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 8 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\mnvcbn .exe,"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4616
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 8
        3⤵
        • Runs ping.exe
        PID:4380
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\mnvcbn .exe,"
        3⤵
        • Modifies WinLogon for persistence
        PID:672
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 9 > nul && copy "C:\Users\Admin\AppData\Local\Temp\2022-11-4 报价请求.PDF.exe" "C:\Users\Admin\AppData\Roaming\mnvcbn .exe" && ping 127.0.0.1 -n 9 > nul && "C:\Users\Admin\AppData\Roaming\mnvcbn .exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5040
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 9
        3⤵
        • Runs ping.exe
        PID:340
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 9
        3⤵
        • Runs ping.exe
        PID:3008
      • C:\Users\Admin\AppData\Roaming\mnvcbn .exe
        "C:\Users\Admin\AppData\Roaming\mnvcbn .exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1512
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
            PID:2492
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
            4⤵
              PID:1944
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
              4⤵
              • Suspicious use of SetThreadContext
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2112
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\kprosxw"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:4060
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\mswhthgkrc"
                5⤵
                • Accesses Microsoft Outlook accounts
                PID:3912
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\xmbslarefkvyb"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4348
            • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
              "C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe"
              4⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1956
              • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
                "C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3188

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Winlogon Helper DLL

      1
      T1004

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Remote System Discovery

      1
      T1018

      Collection

      Email Collection

      1
      T1114

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
        Filesize

        76KB

        MD5

        0e362e7005823d0bec3719b902ed6d62

        SHA1

        590d860b909804349e0cdc2f1662b37bd62f7463

        SHA256

        2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

        SHA512

        518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
        Filesize

        76KB

        MD5

        0e362e7005823d0bec3719b902ed6d62

        SHA1

        590d860b909804349e0cdc2f1662b37bd62f7463

        SHA256

        2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

        SHA512

        518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
        Filesize

        76KB

        MD5

        0e362e7005823d0bec3719b902ed6d62

        SHA1

        590d860b909804349e0cdc2f1662b37bd62f7463

        SHA256

        2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

        SHA512

        518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.txt
        Filesize

        53B

        MD5

        50aaa7473bd9e87e1b4559dffe46e809

        SHA1

        27e70af43475f3bf81ddd5946c0b05231116a9c8

        SHA256

        ff3eda208bdc684f706cc06cc0bb747b2bb29114355d0010682e10caad2620c1

        SHA512

        b7a7acad4c66e2fc059361dec972e211d609287f88709581d563f288b1ee986982689312f9648890676017315758cbb6102769324b9303f03606ee6e3c6c98f0

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.txt
        Filesize

        56B

        MD5

        2f01d3b243e93fe409fcfaacf3f5a331

        SHA1

        f0660148ffa8f896361a8ef829e16c00a63edc01

        SHA256

        0cb008e9cb404de59223092fb8e0dfbd55c433afb0ed5ecf63818a756f7fc724

        SHA512

        417ff80b446411e352cb40982ed0163663275d569a29d39588f48485de19aff0bed87c745f77182c643ee63a95acb48a697de61ac1aedf190912d7148c8cdba5

      • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.txt
        Filesize

        56B

        MD5

        2f01d3b243e93fe409fcfaacf3f5a331

        SHA1

        f0660148ffa8f896361a8ef829e16c00a63edc01

        SHA256

        0cb008e9cb404de59223092fb8e0dfbd55c433afb0ed5ecf63818a756f7fc724

        SHA512

        417ff80b446411e352cb40982ed0163663275d569a29d39588f48485de19aff0bed87c745f77182c643ee63a95acb48a697de61ac1aedf190912d7148c8cdba5

      • C:\Users\Admin\AppData\Local\Temp\kprosxw
        Filesize

        4KB

        MD5

        952a930b9fe70f809a67cb4e765c9448

        SHA1

        7e6c235246cc1be14d8a01ee7688a2a2471d44c9

        SHA256

        bd8156713974af3003c418302d3647fa84f62836fe83613c05e8bc40cb06a867

        SHA512

        10d12f2412fd2cb9ecf47cccd0261b17d9a3323957602c06795c4b2244306837d0a979ec6e552dc023ee81719ebcb9455bdb6f9d44f07788664994d1498452fb

      • C:\Users\Admin\AppData\Roaming\mnvcbn .exe
        Filesize

        1.1MB

        MD5

        b80414e3202a808673a8254aec607a12

        SHA1

        fef5c52c3af36689f3c794ce586d83b0a458afa5

        SHA256

        5c09c1cfdc80893c1a64a68ed969bd26c929c78fb125747ad01064c5b237ad7b

        SHA512

        3e1a4e4918b2b64238403811348248ff5955793cf405087edaac332461c74ee3d26b21f814565d22ae4f30cc4436821ac7f9fcdc61cae38d1ce8adf3ff2609b3

      • C:\Users\Admin\AppData\Roaming\mnvcbn .exe
        Filesize

        1.1MB

        MD5

        b80414e3202a808673a8254aec607a12

        SHA1

        fef5c52c3af36689f3c794ce586d83b0a458afa5

        SHA256

        5c09c1cfdc80893c1a64a68ed969bd26c929c78fb125747ad01064c5b237ad7b

        SHA512

        3e1a4e4918b2b64238403811348248ff5955793cf405087edaac332461c74ee3d26b21f814565d22ae4f30cc4436821ac7f9fcdc61cae38d1ce8adf3ff2609b3

      • memory/340-140-0x0000000000000000-mapping.dmp
      • memory/672-141-0x0000000000000000-mapping.dmp
      • memory/1512-143-0x0000000000000000-mapping.dmp
      • memory/1512-146-0x0000000000120000-0x0000000000240000-memory.dmp
        Filesize

        1.1MB

      • memory/1944-148-0x0000000000000000-mapping.dmp
      • memory/1956-162-0x0000000000000000-mapping.dmp
      • memory/1956-165-0x0000000000F30000-0x0000000000F4A000-memory.dmp
        Filesize

        104KB

      • memory/2112-152-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2112-149-0x0000000000000000-mapping.dmp
      • memory/2112-150-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2112-151-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2112-153-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2112-171-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2492-147-0x0000000000000000-mapping.dmp
      • memory/3008-142-0x0000000000000000-mapping.dmp
      • memory/3188-167-0x0000000000000000-mapping.dmp
      • memory/3736-134-0x0000000005830000-0x00000000058C2000-memory.dmp
        Filesize

        584KB

      • memory/3736-136-0x0000000006D20000-0x0000000006D2A000-memory.dmp
        Filesize

        40KB

      • memory/3736-135-0x00000000058D0000-0x000000000596C000-memory.dmp
        Filesize

        624KB

      • memory/3736-133-0x0000000005DE0000-0x0000000006384000-memory.dmp
        Filesize

        5.6MB

      • memory/3736-132-0x00000000000E0000-0x0000000000200000-memory.dmp
        Filesize

        1.1MB

      • memory/3912-158-0x0000000000400000-0x0000000000457000-memory.dmp
        Filesize

        348KB

      • memory/3912-155-0x0000000000000000-mapping.dmp
      • memory/4060-159-0x0000000000400000-0x0000000000478000-memory.dmp
        Filesize

        480KB

      • memory/4060-160-0x0000000000400000-0x0000000000478000-memory.dmp
        Filesize

        480KB

      • memory/4060-154-0x0000000000000000-mapping.dmp
      • memory/4348-157-0x0000000000400000-0x0000000000424000-memory.dmp
        Filesize

        144KB

      • memory/4348-156-0x0000000000000000-mapping.dmp
      • memory/4380-138-0x0000000000000000-mapping.dmp
      • memory/4616-137-0x0000000000000000-mapping.dmp
      • memory/5040-139-0x0000000000000000-mapping.dmp