Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-08-2024 14:19

General

  • Target

    PURCHASEORDER03.05.2024.PDF.exe

  • Size

    626KB

  • MD5

    9be2bb8f46192a7cf7006587c0e95d54

  • SHA1

    9e31f25cd0c0cf37a92a61ebd87293b519da5534

  • SHA256

    4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940

  • SHA512

    76140dd7bcfdb778b70c4864934016b9cbc60b4f36ece6aa671c6556f1504d38e3428102663c47ffa8346e2201078a28443a0b42be0c6b7e820f6823cab4810b

  • SSDEEP

    12288:naxvaBAHu5sn0ulSRNQeILTPNRLZi8s7exFe2WM:a9aBAObRNVI/PNxzxFMM

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

103.67.162.233:9462

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-GRR4WM

  • 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 3 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 1 IoCs

    Run Powershell and hide display window.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Drops file in Windows directory 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 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PURCHASEORDER03.05.2024.PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\PURCHASEORDER03.05.2024.PDF.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4068
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -windowstyle hidden "$Afmatningens=Get-Content 'C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys';$Unsucculent=$Afmatningens.SubString(619,3);.$Unsucculent($Afmatningens)"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4596
      • C:\Program Files (x86)\windows mail\wab.exe
        "C:\Program Files (x86)\windows mail\wab.exe"
        3⤵
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4504
        • C:\Program Files (x86)\windows mail\wab.exe
          "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wupimsllurmcduxhxqbsvgrxzsdnatth"
          4⤵
            PID:4736
          • C:\Program Files (x86)\windows mail\wab.exe
            "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wupimsllurmcduxhxqbsvgrxzsdnatth"
            4⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2016
          • C:\Program Files (x86)\windows mail\wab.exe
            "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\gwua"
            4⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:4700
          • C:\Program Files (x86)\windows mail\wab.exe
            "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\iqilodg"
            4⤵
              PID:4556
            • C:\Program Files (x86)\windows mail\wab.exe
              "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\iqilodg"
              4⤵
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1444

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\logs.dat

        Filesize

        144B

        MD5

        9fb8a91c90ddca094a77ae065990f806

        SHA1

        dc7ca9e8e88a50e59b33c102d8f3c52e146ab6e3

        SHA256

        0ba07473305da5211191a9a981b9eec3431fbb8d02b08efd0e836203afd0fb98

        SHA512

        6f8ed1b8476e5e5b76ad35bd77c8d66d69ff9d748737eb5f981286114d98c7a1f99db31394da6aa49b1e6976c12e677b99c88d568443ae051e77700210c3414d

      • C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys

        Filesize

        52KB

        MD5

        d9a344e48210c5d555312be94347270a

        SHA1

        8e1957cb5f8e181411781bca9fa72f57e8d0d2b1

        SHA256

        e31954e86c5fadd5da5409be4c6266ac0740652f25073eb29f87d6727d0668b6

        SHA512

        ed1c9a1ce86f20c3eb860079067a7476b8e543c212b0fccd1e73183b6535dec74f34ece8b0225f10fd2f211af68bac6d7302c3b91e1a88d30285ad202854d853

      • C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Sacrificed.Guf

        Filesize

        310KB

        MD5

        e5923d356c8ca6e039eb3c12c3f8ce7a

        SHA1

        b920b2490fb5bbcefb281df27180eaa4f81825fc

        SHA256

        a3761e7a154e7defc78d9be7e003d327de84520afe5d8adc90074822ade75b65

        SHA512

        41af37685e04e272fe7b0b4e0dcb93b0ca6e33f930dc362ba82f93fa428ba0664ce06699c21ccb55a84c5e927d30415fe110cb6f35b1028d46f97d2f7ec95f4f

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fsz0gudm.r0p.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        4KB

        MD5

        1891919175c888ce82e9bd8a047b01ad

        SHA1

        502a6892a5d27ecb791ac5aa6d8586944f540453

        SHA256

        a6c43b4e4b8681cf0ef56c49c730fa77e34dc82db0260253a3ba75039030b9ec

        SHA512

        8bb940050b1abf6c27db133ed446f41e108f670f361ed5102408832ce33d9b87cd0880723441f1632292eeeb0a319c4e0fac0ea659eb55ebe1130cc3e6c776a3

      • memory/1444-67-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/1444-68-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/1444-65-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2016-61-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2016-66-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2016-63-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/4504-83-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-89-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-78-0x0000000022FE0000-0x0000000022FF9000-memory.dmp

        Filesize

        100KB

      • memory/4504-79-0x0000000022FE0000-0x0000000022FF9000-memory.dmp

        Filesize

        100KB

      • memory/4504-80-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-45-0x0000000077981000-0x0000000077AA1000-memory.dmp

        Filesize

        1.1MB

      • memory/4504-86-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-75-0x0000000022FE0000-0x0000000022FF9000-memory.dmp

        Filesize

        100KB

      • memory/4504-92-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-95-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-98-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-58-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-50-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-48-0x0000000001400000-0x0000000002654000-memory.dmp

        Filesize

        18.3MB

      • memory/4504-46-0x0000000077A08000-0x0000000077A09000-memory.dmp

        Filesize

        4KB

      • memory/4504-47-0x0000000077981000-0x0000000077AA1000-memory.dmp

        Filesize

        1.1MB

      • memory/4596-26-0x00000000061F0000-0x000000000620A000-memory.dmp

        Filesize

        104KB

      • memory/4596-23-0x0000000005CE0000-0x0000000005CFE000-memory.dmp

        Filesize

        120KB

      • memory/4596-44-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-41-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-40-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-39-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-38-0x0000000008790000-0x000000000D605000-memory.dmp

        Filesize

        78.5MB

      • memory/4596-37-0x0000000073F3E000-0x0000000073F3F000-memory.dmp

        Filesize

        4KB

      • memory/4596-55-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-36-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-34-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-6-0x00000000026F0000-0x0000000002726000-memory.dmp

        Filesize

        216KB

      • memory/4596-8-0x0000000004FC0000-0x00000000055E8000-memory.dmp

        Filesize

        6.2MB

      • memory/4596-33-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-32-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-7-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-30-0x0000000008110000-0x000000000878A000-memory.dmp

        Filesize

        6.5MB

      • memory/4596-28-0x00000000074E0000-0x0000000007A84000-memory.dmp

        Filesize

        5.6MB

      • memory/4596-5-0x0000000073F3E000-0x0000000073F3F000-memory.dmp

        Filesize

        4KB

      • memory/4596-27-0x0000000006240000-0x0000000006262000-memory.dmp

        Filesize

        136KB

      • memory/4596-25-0x0000000006C90000-0x0000000006D26000-memory.dmp

        Filesize

        600KB

      • memory/4596-24-0x0000000005D10000-0x0000000005D5C000-memory.dmp

        Filesize

        304KB

      • memory/4596-43-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4596-18-0x00000000056F0000-0x0000000005A44000-memory.dmp

        Filesize

        3.3MB

      • memory/4596-12-0x0000000004E90000-0x0000000004EF6000-memory.dmp

        Filesize

        408KB

      • memory/4596-11-0x0000000004DB0000-0x0000000004E16000-memory.dmp

        Filesize

        408KB

      • memory/4596-10-0x0000000004D00000-0x0000000004D22000-memory.dmp

        Filesize

        136KB

      • memory/4596-9-0x0000000073F30000-0x00000000746E0000-memory.dmp

        Filesize

        7.7MB

      • memory/4700-69-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/4700-64-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/4700-62-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB