Analysis

  • max time kernel
    149s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • 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 14 IoCs
  • Suspicious behavior: MapViewOfSection 4 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:1884
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 10 > 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:1976
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • Runs ping.exe
        PID:1960
      • 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:1028
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 18 > 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 18 > nul && "C:\Users\Admin\AppData\Roaming\mnvcbn .exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:584
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 18
        3⤵
        • Runs ping.exe
        PID:1432
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 18
        3⤵
        • Runs ping.exe
        PID:1328
      • C:\Users\Admin\AppData\Roaming\mnvcbn .exe
        "C:\Users\Admin\AppData\Roaming\mnvcbn .exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2012
        • 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:640
          • 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\skxolfphrjvjjiwf"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:316
          • 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\vmkhmxabfrnomoljsnc"
            5⤵
            • Accesses Microsoft Outlook accounts
            PID:1968
          • 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\fhprnqkctzfawuhnbywfsx"
            5⤵
              PID:1932
            • 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\fhprnqkctzfawuhnbywfsx"
              5⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2020
          • C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe
            "C:\Users\Admin\AppData\Local\Temp\ mnvcbnqa.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1076
            • 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:1640

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    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

      ba828a567383f2bdd58824f26781e12e

      SHA1

      ba9c7e1a71ef97b683b6ec44c95e0be0bcbec742

      SHA256

      cfee7a1c39db26367884703541b45e711ed6c9e4a790c30a410eed459c2793bd

      SHA512

      8ee9a49acbd5bb9f09fb59277ed2bafafa893abfa2727dd7b44ad77bfd79145b0fb31d24eaade3cc9ca7e98397ea9476eb94775aae5bea8ae5211fa420f31f2f

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

      56B

      MD5

      c5b0a3039c2a3911f4825991f45e6df3

      SHA1

      d8a94a86b30f7d4b4568acd814d20020f2da8b66

      SHA256

      586fbeacd6f5c76b0ebb081f552b7b438e782475abef3ee4f17423c652ed123d

      SHA512

      54f489deca2817f5f5871bec733061f575fae207e6cd14658b5912db374ad326053a61df737ac138c3f51940129f8abb99cfba667c8483678d8beb643d2de912

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

      56B

      MD5

      c5b0a3039c2a3911f4825991f45e6df3

      SHA1

      d8a94a86b30f7d4b4568acd814d20020f2da8b66

      SHA256

      586fbeacd6f5c76b0ebb081f552b7b438e782475abef3ee4f17423c652ed123d

      SHA512

      54f489deca2817f5f5871bec733061f575fae207e6cd14658b5912db374ad326053a61df737ac138c3f51940129f8abb99cfba667c8483678d8beb643d2de912

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

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • 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

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

      76KB

      MD5

      0e362e7005823d0bec3719b902ed6d62

      SHA1

      590d860b909804349e0cdc2f1662b37bd62f7463

      SHA256

      2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

      SHA512

      518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

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

      76KB

      MD5

      0e362e7005823d0bec3719b902ed6d62

      SHA1

      590d860b909804349e0cdc2f1662b37bd62f7463

      SHA256

      2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

      SHA512

      518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

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

      1.1MB

      MD5

      b80414e3202a808673a8254aec607a12

      SHA1

      fef5c52c3af36689f3c794ce586d83b0a458afa5

      SHA256

      5c09c1cfdc80893c1a64a68ed969bd26c929c78fb125747ad01064c5b237ad7b

      SHA512

      3e1a4e4918b2b64238403811348248ff5955793cf405087edaac332461c74ee3d26b21f814565d22ae4f30cc4436821ac7f9fcdc61cae38d1ce8adf3ff2609b3

    • memory/316-90-0x0000000000476274-mapping.dmp
    • memory/316-101-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/584-60-0x0000000000000000-mapping.dmp
    • memory/640-89-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-85-0x00000000004327A4-mapping.dmp
    • memory/640-72-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-73-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-75-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-77-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-78-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-80-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-79-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-82-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-84-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-113-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/640-88-0x0000000000400000-0x000000000047F000-memory.dmp
      Filesize

      508KB

    • memory/1028-62-0x0000000000000000-mapping.dmp
    • memory/1076-98-0x0000000000000000-mapping.dmp
    • memory/1076-102-0x0000000001000000-0x000000000101A000-memory.dmp
      Filesize

      104KB

    • memory/1328-63-0x0000000000000000-mapping.dmp
    • memory/1432-61-0x0000000000000000-mapping.dmp
    • memory/1640-107-0x0000000000000000-mapping.dmp
    • memory/1884-55-0x0000000075571000-0x0000000075573000-memory.dmp
      Filesize

      8KB

    • memory/1884-56-0x00000000004C0000-0x00000000004F0000-memory.dmp
      Filesize

      192KB

    • memory/1884-57-0x0000000000AF0000-0x0000000000B08000-memory.dmp
      Filesize

      96KB

    • memory/1884-54-0x0000000000E70000-0x0000000000F90000-memory.dmp
      Filesize

      1.1MB

    • memory/1960-59-0x0000000000000000-mapping.dmp
    • memory/1968-105-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/1968-91-0x0000000000455238-mapping.dmp
    • memory/1968-112-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/1976-58-0x0000000000000000-mapping.dmp
    • memory/2012-71-0x00000000006A0000-0x00000000006A6000-memory.dmp
      Filesize

      24KB

    • memory/2012-65-0x0000000000000000-mapping.dmp
    • memory/2012-68-0x0000000001320000-0x0000000001440000-memory.dmp
      Filesize

      1.1MB

    • memory/2012-70-0x0000000000680000-0x000000000069A000-memory.dmp
      Filesize

      104KB

    • memory/2020-96-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/2020-94-0x0000000000422206-mapping.dmp