Overview

overview

10

Static

static

3

nursultan_alpha.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    17s
  • max time network
    14s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-11-2024 12:15

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General

  • Target

    nursultan_alpha.exe

  • Size

    213KB

  • MD5

    2ce2e55b2b14a7191fc4fb3afe5b111b

  • SHA1

    2823a92731885550f3ef3592e6cd3a9d8dd463c9

  • SHA256

    2117a2ed185e31ac5ecd7c624aba8790ac58b1a19922ebc8e1f9d98b272c8557

  • SHA512

    f9bb14f35e35d320745e0d8e18a102b777945fe42da9e041f0afb4c3882d3be93ccd402d9461150a0d8d21a15e80b5aeccfbdb0c8f9c69fc24f234158c82990a

  • SSDEEP

    3072:/yD6vMr7B1bXOgy+Peamb+IutMR8rNaH19lv3+BSydcqgOgpzm2vi75ifDzVIII:qxcmmbutMbH19l0SyePpzfW5if

Score
10/10
remcossvchost.exediscoveryevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Botnet

svchost.exe

C2

schedule-lambda.gl.at.ply.gg:52195

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    svchost.exe

  • copy_folder

    svchost

  • delete_file

    true

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-T8EQ04

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Microsoft Systems inc.

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

    ratremcos
  • Remcos family
    remcos
  • UAC bypass 3 TTPs 2 IoCs
    evasiontrojan
  • Adds policy Run key to start application 2 TTPs 4 IoCs
    persistence
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\nursultan_alpha.exe
    "C:\Users\Admin\AppData\Local\Temp\nursultan_alpha.exe"
    1⤵
    • Adds policy Run key to start application
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2740
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3420
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3608
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3300
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3768
        • C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
          C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
          4⤵
          • Adds policy Run key to start application
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:2952
          • C:\Windows\SysWOW64\cmd.exe
            /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:2676
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • UAC bypass
              • System Location Discovery: System Language Discovery
              • Modifies registry key
              PID:4916
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
              PID:1700

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\install.vbs
      Filesize

      564B

      MD5

      cbd62b79334649b88bcf154ade604d4b

      SHA1

      8fa3d6a912ecfecc31ad8c472d791436d8835668

      SHA256

      1cdc85bf1fc49c2eeea23a69a5af61fb1f8766dadd3b967cdca9dbbc77d14436

      SHA512

      182109b4adfbc9ea87bfb6510b9f3148d05c41e9f07312a90ebe485b0fa3932b810c19e4b39cbd6c73b4cbb237ddf6aede32f030f378ef08cf67a6d80c3b2ab9

      Download Submit

    • C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
      Filesize

      213KB

      MD5

      2ce2e55b2b14a7191fc4fb3afe5b111b

      SHA1

      2823a92731885550f3ef3592e6cd3a9d8dd463c9

      SHA256

      2117a2ed185e31ac5ecd7c624aba8790ac58b1a19922ebc8e1f9d98b272c8557

      SHA512

      f9bb14f35e35d320745e0d8e18a102b777945fe42da9e041f0afb4c3882d3be93ccd402d9461150a0d8d21a15e80b5aeccfbdb0c8f9c69fc24f234158c82990a

      Download Submit

    • memory/1700-12-0x0000000000900000-0x0000000000985000-memory.dmp

      Filesize

      532KB

      Download

    • memory/2740-0-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

      Download

    • memory/2740-1-0x000000000047F000-0x0000000000480000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2740-7-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

      Download

    • memory/2952-14-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

      Download