Analysis

  • max time kernel
    73s
  • max time network
    77s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/09/2024, 18:16

Errors

Reason
Machine shutdown

General

  • Target

    Trisha 2023 OrganizerPDF.exe

  • Size

    6.1MB

  • MD5

    4864a55cff27f686023456a22371e790

  • SHA1

    6ed30c0371fe167d38411bfa6d720fcdcacc4f4c

  • SHA256

    08c7fb6067acc8ac207d28ab616c9ea5bc0d394956455d6a3eecb73f8010f7a2

  • SHA512

    4bd3a16435cca6ce7a7aa829eb967619a8b7c02598474e634442cffc55935870d54d844a04496bf9c7e8c29c40fae59ac6eb39c8550c091d06a28211491d0bfb

  • SSDEEP

    98304:VZQIM+/nv/CDoAkYwpAa5ge1zZ/jtdZwUkQ:bJCKlA2VKUz

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

privmerkt.com:3903

nwemarkets.com:3727

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-NOOI58

  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 15 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 28 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe
    "C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Users\Admin\AppData\Local\Temp\build.exe
        "C:\Users\Admin\AppData\Local\Temp\build.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2624
        • C:\Users\Admin\AppData\Local\Temp\build.exe
          "C:\Users\Admin\AppData\Local\Temp\build.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:4396
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*UpdaterCisco" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\CiscoUpdater000_PARTIAL.dll",EntryPoint /f & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2472
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*UpdaterCisco" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\CiscoUpdater000_PARTIAL.dll",EntryPoint /f
        3⤵
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        PID:1572
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:3144
    • C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe"
      1⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3264
      • C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe
        "C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe"
        2⤵
        • System Location Discovery: System Language Discovery
        PID:4692
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*UpdaterCisco" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\CiscoUpdater000_PARTIAL.dll",EntryPoint /f & exit
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2664
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*UpdaterCisco" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\CiscoUpdater000_PARTIAL.dll",EntryPoint /f
          3⤵
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:3052
    • C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe
      "C:\Users\Admin\AppData\Local\Temp\Trisha 2023 OrganizerPDF.exe"
      1⤵
      • System Location Discovery: System Language Discovery
      PID:3956
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2412
      • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe
        "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\W2 PDF"
        2⤵
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Suspicious use of SetWindowsHookEx
        PID:996
    • C:\Windows\system32\LogonUI.exe
      "LogonUI.exe" /flags:0x4 /state0:0xa39a5055 /state1:0x41c64e6d
      1⤵
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:4572

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\build.exe

      Filesize

      1.8MB

      MD5

      cbacc158e69f7fefb0f469ddf785698b

      SHA1

      a5edae4b2d1531338f9bb43d4795180555a67327

      SHA256

      5cf31c39a21d82668216c8530facec42939660961ae34a5d0afd4fbd9a2a7b6d

      SHA512

      cdf2a76d0df19a1b1be5f4b3f72b640ca9445a8f506c6d61646aa04c2afe1ed2ebf2ebe61ac433bfc0bc87ee39af2d896b46a0fc3a5634572f0fa87beecb5016

    • C:\Users\Admin\Documents\CiscoUpdater000_PARTIAL.dll

      Filesize

      406.5MB

      MD5

      9901ddcd051035087ee1818ac5b3b88c

      SHA1

      d3d99f1821663907432a094410043251afaa6b08

      SHA256

      36d935384caca6942ea3eda9996b1ca46420a47b3cbc70893cf530653072b97f

      SHA512

      e0491c94caad36c9c41e90d8cd7f2119b763bfe2e8f0651cde3ca7931682ed6ff12a383028e4e65e51bbabfc5c3298451491e8aa25e903d0ae02e5182c6eaab1

    • memory/2272-27-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-39-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-75-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-13-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-15-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-16-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-14-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-17-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-8-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-41-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-40-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-19-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-76-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-77-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-25-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-21-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-22-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-24-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-20-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2272-26-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/2624-45-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/2624-44-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/2624-43-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/2624-49-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/2624-47-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/2624-42-0x0000000000400000-0x00000000005CB000-memory.dmp

      Filesize

      1.8MB

    • memory/3012-0-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-9-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-1-0x000000001017D000-0x0000000010188000-memory.dmp

      Filesize

      44KB

    • memory/3012-4-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-3-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-7-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-6-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3012-18-0x000000001017D000-0x0000000010188000-memory.dmp

      Filesize

      44KB

    • memory/3012-12-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-60-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-67-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-68-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-61-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-63-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/3264-62-0x0000000010000000-0x00000000101F4000-memory.dmp

      Filesize

      2.0MB

    • memory/4396-58-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-59-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-55-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-53-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-54-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-51-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-52-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-50-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-46-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4396-79-0x00000000005D0000-0x0000000000652000-memory.dmp

      Filesize

      520KB

    • memory/4692-74-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/4692-73-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB

    • memory/4692-71-0x0000000000A30000-0x0000000000AB2000-memory.dmp

      Filesize

      520KB