Analysis

  • max time kernel
    148s
  • max time network
    151s
  • 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) 28 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 7 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 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:2428
    • 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:2740
    • 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:2824
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7F0F.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2768
    • 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:2660
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\yvzuqpklixkokuan"
        3⤵
          PID:1924
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\yvzuqpklixkokuan"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1756
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\jxnnrzueefctmiwzycw"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1196
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\lrsyssfgsouyxokdpnjupc"
          3⤵
            PID:2044
          • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
            C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\lrsyssfgsouyxokdpnjupc"
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2528

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\ProgramData\remcos\logs.dat

              Filesize

              144B

              MD5

              a354f25a17731e4d999c05dc237d3153

              SHA1

              b83edc2ef8d0f5a7382f77460983dc9a3fd47536

              SHA256

              fd8643558eaaa90029a09aaa3406cb1275ee5b79857216bdb43b1da82c2f20fa

              SHA512

              75d4571bcfb45c5555b212a5d69a4acaa28de9338a1ea90f15cf1c51c594d5ec8b214b69e44911870883db58be613eaac55af9ee9a3d42fcecad6bd2764a8289

            • C:\Users\Admin\AppData\Local\Temp\tmp7F0F.tmp

              Filesize

              1KB

              MD5

              8232d57a32198dd1f7e4b5c48fd82a66

              SHA1

              9e4ce3eb703d0d101710e5041ffd83033c6a1d7a

              SHA256

              6c34bbf2e7bd6c43530959a0bc440b8f4a91c0eb6e8d768ea81daa30d6d71eb6

              SHA512

              7cb4c56df9f426c02c13f45d0f3f3cf68a4a40453d16a0a6ea644769d48220e52f11bde90a58f656e9d7cf0d9b344e4432fd5f38511a431b4845350ce40d5df2

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

              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

              e564bb764920de9fe93ce9b0e892e320

              SHA1

              57097b440a86f494b2c99345ad79867ce2c3e310

              SHA256

              35d8533a3686939d00cae31704f0802dfc5cbfed6520c519967e8a7ccec0cfb4

              SHA512

              8dc88f75b41e79136069d0908c2eac98fd8ea7360862ca8dcfc8d59ca42af1cf0c46f011a11a31eff12bc7cbf8541b6420f12530ee0cd616a786f93c4dad0b84

            • memory/1196-70-0x0000000000400000-0x0000000000457000-memory.dmp

              Filesize

              348KB

            • memory/1196-74-0x0000000000400000-0x0000000000457000-memory.dmp

              Filesize

              348KB

            • memory/1196-63-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1196-93-0x0000000000400000-0x0000000000457000-memory.dmp

              Filesize

              348KB

            • memory/1196-67-0x0000000000400000-0x0000000000457000-memory.dmp

              Filesize

              348KB

            • memory/1756-71-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/1756-62-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/1756-77-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/1756-88-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/2428-6-0x00000000083E0000-0x00000000084A6000-memory.dmp

              Filesize

              792KB

            • memory/2428-0-0x0000000000BD0000-0x0000000000CDA000-memory.dmp

              Filesize

              1.0MB

            • memory/2428-42-0x00000000748A0000-0x0000000074F8E000-memory.dmp

              Filesize

              6.9MB

            • memory/2428-5-0x0000000000500000-0x000000000050E000-memory.dmp

              Filesize

              56KB

            • memory/2428-4-0x00000000004F0000-0x00000000004FA000-memory.dmp

              Filesize

              40KB

            • memory/2428-3-0x00000000004C0000-0x00000000004D4000-memory.dmp

              Filesize

              80KB

            • memory/2428-2-0x0000000007160000-0x00000000071A0000-memory.dmp

              Filesize

              256KB

            • memory/2428-1-0x00000000748A0000-0x0000000074F8E000-memory.dmp

              Filesize

              6.9MB

            • memory/2528-82-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2528-81-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2528-80-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2528-78-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2528-83-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2660-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2660-37-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-119-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-112-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-51-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-53-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-111-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-54-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-55-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-56-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-57-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-58-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-59-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-108-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2660-64-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-46-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-40-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-45-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-19-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-105-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-39-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-48-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-33-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-31-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-29-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-27-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-25-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-23-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-91-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-94-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2660-97-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2660-21-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-98-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2660-99-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2660-100-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-101-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2660-102-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2740-41-0x000000006F3F0000-0x000000006F99B000-memory.dmp

              Filesize

              5.7MB

            • memory/2740-50-0x000000006F3F0000-0x000000006F99B000-memory.dmp

              Filesize

              5.7MB

            • memory/2740-49-0x0000000002490000-0x00000000024D0000-memory.dmp

              Filesize

              256KB

            • memory/2824-44-0x000000006F3F0000-0x000000006F99B000-memory.dmp

              Filesize

              5.7MB

            • memory/2824-47-0x000000006F3F0000-0x000000006F99B000-memory.dmp

              Filesize

              5.7MB

            • memory/2824-52-0x000000006F3F0000-0x000000006F99B000-memory.dmp

              Filesize

              5.7MB