Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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 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 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:1048
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 7 > 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:1284
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 7
        3⤵
        • Runs ping.exe
        PID:1004
      • 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:1708
    • 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⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:772
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 9
        3⤵
        • Runs ping.exe
        PID:1944
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 9
        3⤵
        • Runs ping.exe
        PID:316
      • 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:1248
        • 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:1820
          • 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\dtlrgitodanwjkkyuwgezebkxaapt"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1600
          • 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\ovrkhaeirifblqycehsgkrwtghryuyrtl"
            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\ypeuh"
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1760
        • 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
          • Suspicious use of WriteProcessMemory
          PID:1496
          • 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:624

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

    dffb1d7b769d6bf08834d09bcf3691c4

    SHA1

    deba945ca3d66fe6d8d0f57576106dddd493c27c

    SHA256

    6dd30a533e073ce29213abc5c0d5fd9426ff9784bcfacadbc279935b047edd6d

    SHA512

    ddb4b305ccff7a47b3ea404d44d1e5f8b36253f5c5450b25b610ec9836e2f421e89335a488823ab4dbd58ccd09f16c5c80285cc2a15b157a2c0dde5b59e6bbea

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

    56B

    MD5

    0762b57b129b6f609006846041fcf41d

    SHA1

    f553de9bedf9e34c94e29f16d45af85e089c3468

    SHA256

    adf850d6eaa74ae3166ae7bfd520a0c579a67cb079dff1e4eab01b89dc2e4fd3

    SHA512

    d99ff0067160847b9db070fccda7ae6fe84464914a90ecf42613bb8ff85975c878ae94f71c2a13e0632dde4c6bbae2486cd40baac03a81d88808b4cc67054f85

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

    55B

    MD5

    bf8a773c55bb66b15054d54f2e88017b

    SHA1

    b8b408c9d49e569501052c2782aa7a4cbc10f494

    SHA256

    4fec57cd5500be4a29b398d60957e33fdd2390be0bab103d900fb776b2dcc019

    SHA512

    806a4003405df5c335624405f05560a5599dcda5a5163ddbd8846c5063b0e92c05315192cf4afbce1166aa1beabe794302066192eee0230bd34f5af98c960459

  • C:\Users\Admin\AppData\Local\Temp\dtlrgitodanwjkkyuwgezebkxaapt
    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/316-63-0x0000000000000000-mapping.dmp
  • memory/624-108-0x0000000000000000-mapping.dmp
  • memory/772-60-0x0000000000000000-mapping.dmp
  • memory/1004-59-0x0000000000000000-mapping.dmp
  • memory/1048-54-0x0000000001340000-0x0000000001460000-memory.dmp
    Filesize

    1.1MB

  • memory/1048-57-0x0000000000B00000-0x0000000000B18000-memory.dmp
    Filesize

    96KB

  • memory/1048-56-0x0000000000500000-0x0000000000530000-memory.dmp
    Filesize

    192KB

  • memory/1048-55-0x0000000076171000-0x0000000076173000-memory.dmp
    Filesize

    8KB

  • memory/1248-65-0x0000000000000000-mapping.dmp
  • memory/1248-71-0x0000000000CE0000-0x0000000000CE6000-memory.dmp
    Filesize

    24KB

  • memory/1248-68-0x00000000010B0000-0x00000000011D0000-memory.dmp
    Filesize

    1.1MB

  • memory/1248-70-0x0000000000C30000-0x0000000000C4A000-memory.dmp
    Filesize

    104KB

  • memory/1284-58-0x0000000000000000-mapping.dmp
  • memory/1496-98-0x0000000000000000-mapping.dmp
  • memory/1496-101-0x0000000000070000-0x000000000008A000-memory.dmp
    Filesize

    104KB

  • memory/1600-102-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/1600-90-0x0000000000476274-mapping.dmp
  • memory/1708-62-0x0000000000000000-mapping.dmp
  • memory/1760-96-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/1760-94-0x0000000000422206-mapping.dmp
  • memory/1820-73-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-72-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-75-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-78-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-85-0x00000000004327A4-mapping.dmp
  • memory/1820-77-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-89-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-79-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-84-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-113-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-82-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-80-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1820-88-0x0000000000400000-0x000000000047F000-memory.dmp
    Filesize

    508KB

  • memory/1944-61-0x0000000000000000-mapping.dmp
  • memory/1968-91-0x0000000000455238-mapping.dmp
  • memory/1968-112-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB

  • memory/1968-106-0x0000000000400000-0x0000000000457000-memory.dmp
    Filesize

    348KB