Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    13/02/2024, 02:26

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 18 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 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:2220
    • 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:2844
    • 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:3012
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA4A8.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2992
    • 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:2664
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\vdvtgixvtdoriwzinkvefkibeoynoqipho"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:932
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\qzgwhlsqvt"
        3⤵
          PID:2868
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\qzgwhlsqvt"
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2880
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\ffbdgti"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1664

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\remcos\logs.dat

            Filesize

            144B

            MD5

            eaeb48c3a8cb766cb146d01b56b3bfcc

            SHA1

            001bd5a939da2d9c10cb3fdb1ab30b72306c0bac

            SHA256

            b3d6bed9864c6d092a09cdea7d8a2488cb489301d9179faedbafc10fb5b69eeb

            SHA512

            202b671c50f0d4b421731f948305d457c761cf0408270e15198cb1b7c206ae0c2ee2370bc34873ef9cf7c7980fe55d71f9ea9c845f0042e8522b433657f84618

          • C:\Users\Admin\AppData\Local\Temp\tmpA4A8.tmp

            Filesize

            1KB

            MD5

            34f577ba603d0f7aaaaa466639a07062

            SHA1

            1de580c95370e08f23d5fae216f3abf4d19fae58

            SHA256

            5a57e1256539693891aea24d930b229d59b2a8af73e382158213818d298c88ca

            SHA512

            460042470c0eb76b019aa6b8c0bd9be88e74afdca23456646d50769e29a5a9bd338cb1290690a5d5430be3ee9be98011c7da0775a9a6b07e24c870a155d3eb90

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

            Filesize

            2B

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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

            Filesize

            7KB

            MD5

            8c3d78a8472c5c4ae81d94a5e1427855

            SHA1

            4615126e60bfb670eabb79ae284f26f6a124c1a7

            SHA256

            1e5542b2ed2aef299f629a23e04775d284cfc817b2ad0fb53a8fe779d4eb96c8

            SHA512

            79c20f0a10342fb4d7c7e46cc8a98caaca724f52504783b3a3fcd2b112bcb13fcac39d71e7a3d005a31104a8b707ea64b2d7b93cee0fabc21eee6fbde49e1625

          • memory/932-59-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/932-64-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/932-61-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/932-86-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/1664-89-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/1664-72-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/1664-69-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/1664-66-0x0000000000400000-0x0000000000457000-memory.dmp

            Filesize

            348KB

          • memory/2220-6-0x0000000007200000-0x00000000072C6000-memory.dmp

            Filesize

            792KB

          • memory/2220-35-0x0000000074550000-0x0000000074C3E000-memory.dmp

            Filesize

            6.9MB

          • memory/2220-5-0x0000000000A20000-0x0000000000A2E000-memory.dmp

            Filesize

            56KB

          • memory/2220-4-0x0000000000A10000-0x0000000000A1A000-memory.dmp

            Filesize

            40KB

          • memory/2220-3-0x00000000009E0000-0x00000000009F4000-memory.dmp

            Filesize

            80KB

          • memory/2220-2-0x00000000071C0000-0x0000000007200000-memory.dmp

            Filesize

            256KB

          • memory/2220-1-0x0000000074550000-0x0000000074C3E000-memory.dmp

            Filesize

            6.9MB

          • memory/2220-0-0x0000000001300000-0x000000000140A000-memory.dmp

            Filesize

            1.0MB

          • memory/2664-52-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-25-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-36-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-37-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-38-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-127-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-126-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-119-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-118-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-111-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-110-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-45-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-47-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-103-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2664-49-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-51-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-32-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-102-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-101-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-53-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-55-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-56-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-30-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2664-27-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-65-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-26-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-33-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-24-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-19-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-96-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-95-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2664-94-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2664-93-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2664-92-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2664-23-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-21-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-22-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2664-88-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2844-46-0x0000000001DC0000-0x0000000001E00000-memory.dmp

            Filesize

            256KB

          • memory/2844-44-0x0000000001DC0000-0x0000000001E00000-memory.dmp

            Filesize

            256KB

          • memory/2844-40-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB

          • memory/2844-80-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB

          • memory/2844-42-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB

          • memory/2844-50-0x0000000001DC0000-0x0000000001E00000-memory.dmp

            Filesize

            256KB

          • memory/2880-79-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2880-75-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2880-77-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2880-73-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/3012-43-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB

          • memory/3012-48-0x00000000025C0000-0x0000000002600000-memory.dmp

            Filesize

            256KB

          • memory/3012-78-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB

          • memory/3012-41-0x00000000025C0000-0x0000000002600000-memory.dmp

            Filesize

            256KB

          • memory/3012-39-0x000000006F1A0000-0x000000006F74B000-memory.dmp

            Filesize

            5.7MB