Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    13/02/2024, 02:39

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) 29 IoCs
  • Detects executables built or packed with MPress PE compressor 15 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 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:2148
    • 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:2776
    • 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:2672
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7C22.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2556
    • 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:2560
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\kxfykdhiffnkal"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:464
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\urlrkosbtofpkzpsn"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:436
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\etqblgddhwxunflefcytm"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1332

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          ccb863db75bac689b16b827d2512c3d1

          SHA1

          fe6196f165412aa8a7b44badb84365695ea5fc78

          SHA256

          a07fc9e200be45febc30025ac544359b0e62dc8ae3cd699d365b1d016df0fe64

          SHA512

          a75b68a8ba6f9cc68a5d93702ebcb312e433eb50df6467324eb2e3a0465f004efa98d848c0b007f424f15e9815e9248f0be7f18d0c2c529f5e0bfcf08f08154f

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

          Filesize

          2B

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • C:\Users\Admin\AppData\Local\Temp\tmp7C22.tmp

          Filesize

          1KB

          MD5

          8232d57a32198dd1f7e4b5c48fd82a66

          SHA1

          9e4ce3eb703d0d101710e5041ffd83033c6a1d7a

          SHA256

          6c34bbf2e7bd6c43530959a0bc440b8f4a91c0eb6e8d768ea81daa30d6d71eb6

          SHA512

          7cb4c56df9f426c02c13f45d0f3f3cf68a4a40453d16a0a6ea644769d48220e52f11bde90a58f656e9d7cf0d9b344e4432fd5f38511a431b4845350ce40d5df2

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\JLEH0XOANW3TPI11A8GB.temp

          Filesize

          7KB

          MD5

          41fd422e2756825d3be207a486e80fa6

          SHA1

          48af8d614900d5fc4ad261a1f3100010afc7b4e5

          SHA256

          6bb7f029a9dccdbd4761bf5efbfaf09d1a4f05962c06a0cb583c022376cf9dee

          SHA512

          83f135c79116b16f2449f084cb938a64589f6563edd9f9d2497bd99498539fc20bcaedb163567b8d3f728f9f810ba28faf70835ed8ec0a96645578305e224b01

        • memory/436-74-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/436-72-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/436-69-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/436-90-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/464-85-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/464-64-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/464-67-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/464-70-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1332-73-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/1332-80-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1332-79-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1332-78-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1332-76-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2148-0-0x00000000011A0000-0x00000000012AA000-memory.dmp

          Filesize

          1.0MB

        • memory/2148-3-0x0000000000410000-0x0000000000424000-memory.dmp

          Filesize

          80KB

        • memory/2148-2-0x0000000007130000-0x0000000007170000-memory.dmp

          Filesize

          256KB

        • memory/2148-1-0x0000000074DA0000-0x000000007548E000-memory.dmp

          Filesize

          6.9MB

        • memory/2148-6-0x0000000008360000-0x0000000008426000-memory.dmp

          Filesize

          792KB

        • memory/2148-4-0x0000000000440000-0x000000000044A000-memory.dmp

          Filesize

          40KB

        • memory/2148-37-0x0000000074DA0000-0x000000007548E000-memory.dmp

          Filesize

          6.9MB

        • memory/2148-5-0x0000000000450000-0x000000000045E000-memory.dmp

          Filesize

          56KB

        • memory/2560-31-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2560-35-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-121-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-120-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-45-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-113-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-112-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-49-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-50-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-51-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-52-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-53-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-54-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-57-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-105-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-104-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-60-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-42-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-19-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-38-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-97-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-96-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-43-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-33-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-28-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-26-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-21-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-20-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2560-88-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2560-92-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2560-93-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2560-94-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2672-39-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2672-58-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2672-48-0x0000000002180000-0x00000000021C0000-memory.dmp

          Filesize

          256KB

        • memory/2672-44-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2776-36-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2776-41-0x00000000023D0000-0x0000000002410000-memory.dmp

          Filesize

          256KB

        • memory/2776-59-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2776-47-0x00000000023D0000-0x0000000002410000-memory.dmp

          Filesize

          256KB

        • memory/2776-46-0x000000006FC10000-0x00000000701BB000-memory.dmp

          Filesize

          5.7MB