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Analysis

  • max time kernel
    150s
  • max time network
    121s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/09/2024, 04:17

General

  • Target

    NtOl.exe

  • Size

    1.0MB

  • MD5

    6aa8b2797c962a2bfbed78a30afa3f4a

  • SHA1

    1c76e253db167d7c6a685282973c1bc80bbe8e5e

  • SHA256

    cda34c7ddc45a0ac67f0f3745b91686c285bc86f108c5c2deb36c1c3a0fb5a4f

  • SHA512

    ce9ba1c1282e0d87665bbe27749106de3c42ee7b2bc9e741586ad643129c01f2c7421d1afc98b599568c4fd1e229fcf08d19503426b6507db6f45e222903b145

  • SSDEEP

    24576:0HH6h1OoaYANm0loL58KwewFARcqlE3r9HMQKw:k8t0loL58KwLgQ7lMQKw

Malware Config

Extracted

Family

remcos

Botnet

Aug 19.2

C2

method8888.ddns.net:6902

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-U6KI2M

  • 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.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 2 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
    "C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2292
    • 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\NtOl.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4924
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GIxoePCFR.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2456
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GIxoePCFR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3FC3.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1580
    • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
      "C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
      2⤵
        PID:2420
      • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
        "C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
        2⤵
          PID:2468
        • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
          "C:\Users\Admin\AppData\Local\Temp\NtOl.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4988
          • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
            C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\bzroaqqbrwaxnp"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:4344
          • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
            C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\lcxhbjjvfeskqwdgh"
            3⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:3040
          • C:\Users\Admin\AppData\Local\Temp\NtOl.exe
            C:\Users\Admin\AppData\Local\Temp\NtOl.exe /stext "C:\Users\Admin\AppData\Local\Temp\vwkzcbtwbnkpakrsqdsb"
            3⤵
            • Suspicious use of UnmapMainImage
            PID:2088
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2088 -s 12
              4⤵
              • Program crash
              PID:1540
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2088 -ip 2088
        1⤵
          PID:2408

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          d200cdf41699ebd1bc88f073d120c382

          SHA1

          490d76489d4755dc675b8de883d95922597b6628

          SHA256

          ee5507cef51639979224c6f151baa27aca788f806e7b85a4bd18e092cd9132b1

          SHA512

          306fe4027001693bebc782f75f5023903c303f9fa1a8b06d3dfa4096d6b9c91771e2c1a932e46c48289a6250d68aeb6fa669f6d238f184c53fdf2e62add921a0

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

          Filesize

          2KB

          MD5

          3d086a433708053f9bf9523e1d87a4e8

          SHA1

          b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

          SHA256

          6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

          SHA512

          931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          18KB

          MD5

          9581198cddf948918fc148c7f5b03555

          SHA1

          58702ec558fde24017ce2876fc45b95d39cd1d97

          SHA256

          a869d5a14c77b0ada0e583a69d804fafb1e3bdf8b533ac38af26e6caed0db77a

          SHA512

          a5d6b71930063e39298ec86ae2da3b14f23439ac8110cb3e139ff4a595dce50e7ad7b7db757af1591038c2d9d9743ade83b1d4c514705a7e9d6c68c21d0466c6

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dspgiiyb.gxa.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

          Filesize

          4KB

          MD5

          ea01dd92b15d2f570f6b167dad2d1fd0

          SHA1

          7b89141d4c3eb2f29d096f28a9bfe66eb006224a

          SHA256

          0515f49138d74283f9ac1042fd1a384f715b74c2b99193454dbb0cd585097727

          SHA512

          0e7695aea30250a41829fa4abb681b8c3ed4c0955e18f1f9f3a5456bfb3a76f016f538e557bf29b99ab6ab48c846f9fa3c4bccd8cb5fe73099a81b5946029ec8

        • C:\Users\Admin\AppData\Local\Temp\tmp3FC3.tmp

          Filesize

          1KB

          MD5

          3257b91df60c5853f4b79efda3c790b9

          SHA1

          b7b140f599200ef777d02b00b9213b065c0f756b

          SHA256

          65c5ae25ffabc137028bc63a2a093304d46f25b7e9423ed6ef5f493c7a8e8efd

          SHA512

          1f24cb23f45d3f4af0ed2e96c69db64f3ce7c11c46ba262a09e305b9a3bc70dfab38b1e542497079b435e9befc0390cfe10ed2c9442f765bfd5141ecc775b29b

        • memory/2088-92-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2292-10-0x0000000006B30000-0x0000000006BF0000-memory.dmp

          Filesize

          768KB

        • memory/2292-8-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/2292-9-0x0000000006590000-0x00000000065A0000-memory.dmp

          Filesize

          64KB

        • memory/2292-52-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/2292-11-0x00000000066E0000-0x000000000677C000-memory.dmp

          Filesize

          624KB

        • memory/2292-7-0x000000007507E000-0x000000007507F000-memory.dmp

          Filesize

          4KB

        • memory/2292-6-0x00000000059D0000-0x00000000059E2000-memory.dmp

          Filesize

          72KB

        • memory/2292-4-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/2292-0-0x000000007507E000-0x000000007507F000-memory.dmp

          Filesize

          4KB

        • memory/2292-5-0x00000000053E0000-0x00000000053EA000-memory.dmp

          Filesize

          40KB

        • memory/2292-3-0x0000000005330000-0x00000000053C2000-memory.dmp

          Filesize

          584KB

        • memory/2292-2-0x00000000059E0000-0x0000000005F84000-memory.dmp

          Filesize

          5.6MB

        • memory/2292-1-0x0000000000840000-0x0000000000948000-memory.dmp

          Filesize

          1.0MB

        • memory/2456-102-0x0000000007DD0000-0x0000000007DDE000-memory.dmp

          Filesize

          56KB

        • memory/2456-51-0x0000000006390000-0x00000000066E4000-memory.dmp

          Filesize

          3.3MB

        • memory/2456-111-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/2456-103-0x0000000007DE0000-0x0000000007DF4000-memory.dmp

          Filesize

          80KB

        • memory/2456-20-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/2456-98-0x0000000007E20000-0x0000000007EB6000-memory.dmp

          Filesize

          600KB

        • memory/2456-78-0x0000000073B40000-0x0000000073B8C000-memory.dmp

          Filesize

          304KB

        • memory/2456-97-0x0000000007C10000-0x0000000007C1A000-memory.dmp

          Filesize

          40KB

        • memory/2456-21-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/3040-93-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/3040-80-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/3040-94-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/4344-77-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4344-76-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4344-75-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4924-17-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/4924-19-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/4924-73-0x0000000006220000-0x000000000623E000-memory.dmp

          Filesize

          120KB

        • memory/4924-63-0x0000000073B40000-0x0000000073B8C000-memory.dmp

          Filesize

          304KB

        • memory/4924-74-0x0000000006F80000-0x0000000007023000-memory.dmp

          Filesize

          652KB

        • memory/4924-16-0x0000000002410000-0x0000000002446000-memory.dmp

          Filesize

          216KB

        • memory/4924-112-0x0000000075070000-0x0000000075820000-memory.dmp

          Filesize

          7.7MB

        • memory/4924-18-0x00000000050A0000-0x00000000056C8000-memory.dmp

          Filesize

          6.2MB

        • memory/4924-105-0x0000000007360000-0x0000000007368000-memory.dmp

          Filesize

          32KB

        • memory/4924-96-0x0000000007050000-0x000000000706A000-memory.dmp

          Filesize

          104KB

        • memory/4924-95-0x00000000076B0000-0x0000000007D2A000-memory.dmp

          Filesize

          6.5MB

        • memory/4924-55-0x0000000006240000-0x000000000628C000-memory.dmp

          Filesize

          304KB

        • memory/4924-31-0x00000000057B0000-0x0000000005816000-memory.dmp

          Filesize

          408KB

        • memory/4924-54-0x0000000005D10000-0x0000000005D2E000-memory.dmp

          Filesize

          120KB

        • memory/4924-30-0x0000000005740000-0x00000000057A6000-memory.dmp

          Filesize

          408KB

        • memory/4924-28-0x0000000004F50000-0x0000000004F72000-memory.dmp

          Filesize

          136KB

        • memory/4924-62-0x00000000062C0000-0x00000000062F2000-memory.dmp

          Filesize

          200KB

        • memory/4924-104-0x0000000007380000-0x000000000739A000-memory.dmp

          Filesize

          104KB

        • memory/4924-100-0x0000000007240000-0x0000000007251000-memory.dmp

          Filesize

          68KB

        • memory/4988-44-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-115-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4988-50-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-53-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-57-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-45-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-58-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-47-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-61-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-119-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4988-118-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4988-120-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-123-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-124-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-59-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-131-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-132-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-140-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4988-139-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB