Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    13/02/2024, 02:42

General

  • Target

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe

  • Size

    1.0MB

  • MD5

    e5d2981fd9c531b3cfb780cf781bac91

  • SHA1

    aaf7084c369138eb5588051eda8aec9aa3c4ac26

  • SHA256

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b

  • SHA512

    ec10e5de423564c17caac9e3c8a4ab2d1ed51882c9cfe145374d69e9f18382d7bd23d370f0389fb56c3b77073da11351978e803dc53c7135e618bbf0507be539

  • SSDEEP

    24576:Aazz87bccsW43UyDBU7RCFYK9i3iOpOnC+yqiQDi/DtS:AOz8732BdUCYK9i3X6CPqinDo

Malware Config

Extracted

Family

remcos

Botnet

P2-bin

C2

84.38.132.126:61445

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-ANE1CN

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 31 IoCs
  • Detects executables built or packed with MPress PE compressor 19 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
    "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2656
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3036
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bZurkfs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2684
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp40D7.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2620
    • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
      "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2512
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\bidyhhaquva"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1604
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\dcqrhalkidsvmc"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:1680
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\oewkiselvlkawiqvb"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1772

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          28ec68a2ae3b026a905c1b07804532ec

          SHA1

          4604b1e37eea34cbf15b4e3ff1637ea580cf4196

          SHA256

          7335578bd7ab36ddd24c503fea80b7ded086bf4a47063ff2662544bb6bfb6bfb

          SHA512

          a3518c46328b9fb071d68189357fc1d7acd587d6e26ddd8f8619b104515b0b4e865e33b5b625a62dd4ea487150fa0b6587c25460b3037b739e622e74b41c98b0

        • C:\Users\Admin\AppData\Local\Temp\bidyhhaquva

          Filesize

          2B

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • C:\Users\Admin\AppData\Local\Temp\tmp40D7.tmp

          Filesize

          1KB

          MD5

          8b7293738d19fa19094355c3a393e57d

          SHA1

          7d2fdba1e83a774fe5b88cfc879e571addeaa14e

          SHA256

          a79bae861944da9f2d4cfd0560d9021b6b77919dc42b4cc7eff3c046e1fa46c3

          SHA512

          5c83bb1b13907abbd128c0df33b6b89a728eb51116f73dc1348fe44d5957ba04f2d6c8050ef151248abbf650a77c5437f831324ed0596b49f7b6baf867d9d5fa

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

          Filesize

          7KB

          MD5

          702b5f9b6c94963b92232669b727fb1e

          SHA1

          b2d8b07207427bf0d38025342c315b8ade799fa7

          SHA256

          9ddbaeda51467f545e9092846dd00f534541213240e6ea79fff48d1effd347d4

          SHA512

          8b6f8c1e8d4ec35052b3a73cf4baebea9745551c392c36323b3aa1a9f97e58ad848c280980911db0f46b9158340de4f328aa001b7c0175efcc75396cc2443096

        • memory/1604-87-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1604-67-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1604-70-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1604-63-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1680-75-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1680-68-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1680-90-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1680-78-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1680-77-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/1772-79-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1772-74-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1772-82-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1772-80-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1772-81-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2512-32-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-96-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2512-133-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-34-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-132-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-125-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-124-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-39-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-37-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-117-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-41-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-116-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-109-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-108-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-105-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2512-100-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-99-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-97-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-91-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2512-51-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-52-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-53-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-55-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-54-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-57-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-59-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-60-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-26-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-27-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2512-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-25-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-23-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-21-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-19-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2512-94-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2512-95-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2656-1-0x00000000745E0000-0x0000000074CCE000-memory.dmp

          Filesize

          6.9MB

        • memory/2656-3-0x00000000005C0000-0x00000000005D4000-memory.dmp

          Filesize

          80KB

        • memory/2656-2-0x0000000000A80000-0x0000000000AC0000-memory.dmp

          Filesize

          256KB

        • memory/2656-5-0x00000000009F0000-0x00000000009FE000-memory.dmp

          Filesize

          56KB

        • memory/2656-33-0x00000000745E0000-0x0000000074CCE000-memory.dmp

          Filesize

          6.9MB

        • memory/2656-6-0x0000000007310000-0x00000000073D6000-memory.dmp

          Filesize

          792KB

        • memory/2656-0-0x0000000001000000-0x000000000110A000-memory.dmp

          Filesize

          1.0MB

        • memory/2656-4-0x0000000000960000-0x000000000096A000-memory.dmp

          Filesize

          40KB

        • memory/2684-45-0x0000000002A60000-0x0000000002AA0000-memory.dmp

          Filesize

          256KB

        • memory/2684-43-0x0000000002A60000-0x0000000002AA0000-memory.dmp

          Filesize

          256KB

        • memory/2684-42-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB

        • memory/2684-40-0x0000000002A60000-0x0000000002AA0000-memory.dmp

          Filesize

          256KB

        • memory/2684-36-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB

        • memory/2684-49-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB

        • memory/3036-48-0x0000000001CB0000-0x0000000001CF0000-memory.dmp

          Filesize

          256KB

        • memory/3036-47-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB

        • memory/3036-44-0x0000000001CB0000-0x0000000001CF0000-memory.dmp

          Filesize

          256KB

        • memory/3036-46-0x0000000001CB0000-0x0000000001CF0000-memory.dmp

          Filesize

          256KB

        • memory/3036-50-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB

        • memory/3036-38-0x000000006F450000-0x000000006F9FB000-memory.dmp

          Filesize

          5.7MB