Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-11-2022 09:23

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 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 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 40 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 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:5060
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 9 > 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:4292
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 9
        3⤵
        • Runs ping.exe
        PID:1756
      • 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:4620
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 14 > 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 14 > nul && "C:\Users\Admin\AppData\Roaming\mnvcbn .exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:228
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 14
        3⤵
        • Runs ping.exe
        PID:4752
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 14
        3⤵
        • Runs ping.exe
        PID:5108
      • 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:824
        • 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:1312
          • 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\opoqrmkcrlctddbejblrsuohjdbztdmvwf"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1404
          • 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\yjtasf"
            5⤵
            • Accesses Microsoft Outlook accounts
            PID:3108
          • 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\jeztsxfxab"
            5⤵
              PID:3120
            • 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\jeztsxfxab"
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1180
          • 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
            • Suspicious use of WriteProcessMemory
            PID:4708
            • 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:2336

    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\Microsoft\CLR_v4.0_32\UsageLogs\ mnvcbnqa.exe.log
      Filesize

      1KB

      MD5

      7dca233df92b3884663fa5a40db8d49c

      SHA1

      208b8f27b708c4e06ac37f974471cc7b29c29b60

      SHA256

      90c83311e35da0b5f8aa65aa2109745feb68ee9540e863f4ed909872e9c6a84c

      SHA512

      d134b96fd33c79c85407608f76afc5a9f937bff453b1c90727a3ed992006c7d4c8329be6a2b5ba6b11da1a32f7cd60e9bc380be388b586d6cd5c2e6b1f57bd07

    • 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

      55B

      MD5

      0d4be69e23481f66ccfb524b19e49110

      SHA1

      d0affa7b27ce733f750ad166923781d91e1f8301

      SHA256

      9a972a92bd4f4c47894ae41b508c5f008d9c50706be23f487962b37c714550f9

      SHA512

      14f9a2f37968effac6302e03bc37bab85ea31d2c33b0c24b624624c265bb4b1b1d88856feec73d8f70772a0bff13103cf1931e5e1082cf9ae9406657343b8ba5

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

      55B

      MD5

      01b44c164c9767b828d54085d4188ea6

      SHA1

      3ca5dae75746aef1628ab9e543934ba2384bae5a

      SHA256

      a78acd10811e4ca50a5d621ef0a6ef2df9cfec3597232225b69c9b6c1a7359ae

      SHA512

      d27b5bb9935375dc34a4ca22e332904d6ce17b649b038bd4939108f7a7c37bc5c410f015a7b4f84c14edf86e82ae16d2948a7b83f289190838d0f2034e356b8c

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

      55B

      MD5

      01b44c164c9767b828d54085d4188ea6

      SHA1

      3ca5dae75746aef1628ab9e543934ba2384bae5a

      SHA256

      a78acd10811e4ca50a5d621ef0a6ef2df9cfec3597232225b69c9b6c1a7359ae

      SHA512

      d27b5bb9935375dc34a4ca22e332904d6ce17b649b038bd4939108f7a7c37bc5c410f015a7b4f84c14edf86e82ae16d2948a7b83f289190838d0f2034e356b8c

    • C:\Users\Admin\AppData\Local\Temp\opoqrmkcrlctddbejblrsuohjdbztdmvwf
      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/228-139-0x0000000000000000-mapping.dmp
    • memory/824-146-0x0000000000860000-0x0000000000980000-memory.dmp
      Filesize

      1.1MB

    • memory/824-143-0x0000000000000000-mapping.dmp
    • memory/1180-155-0x0000000000000000-mapping.dmp
    • memory/1180-157-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/1312-170-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1312-147-0x0000000000000000-mapping.dmp
    • memory/1312-148-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1312-149-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1312-150-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1312-151-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1404-152-0x0000000000000000-mapping.dmp
    • memory/1404-158-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/1756-138-0x0000000000000000-mapping.dmp
    • memory/2336-165-0x0000000000000000-mapping.dmp
    • memory/3108-153-0x0000000000000000-mapping.dmp
    • memory/3108-156-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/3120-154-0x0000000000000000-mapping.dmp
    • memory/4292-137-0x0000000000000000-mapping.dmp
    • memory/4620-141-0x0000000000000000-mapping.dmp
    • memory/4708-162-0x00000000004E0000-0x00000000004FA000-memory.dmp
      Filesize

      104KB

    • memory/4708-159-0x0000000000000000-mapping.dmp
    • memory/4752-140-0x0000000000000000-mapping.dmp
    • memory/5060-132-0x0000000000170000-0x0000000000290000-memory.dmp
      Filesize

      1.1MB

    • memory/5060-136-0x0000000005F50000-0x0000000005F5A000-memory.dmp
      Filesize

      40KB

    • memory/5060-135-0x0000000004B50000-0x0000000004BEC000-memory.dmp
      Filesize

      624KB

    • memory/5060-134-0x0000000004A50000-0x0000000004AE2000-memory.dmp
      Filesize

      584KB

    • memory/5060-133-0x0000000005100000-0x00000000056A4000-memory.dmp
      Filesize

      5.6MB

    • memory/5108-142-0x0000000000000000-mapping.dmp