Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 13:20

General

  • Target
    472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe
  • Size 1.1MB
  • Sample240524-qljabsff38
  • SHA256 472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 45.95.169.137:2404

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

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NG20QI

  • 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.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • 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 3 IoCs

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

  • Executes dropped EXE 6 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 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe
    "C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4916
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GxGUIRTmI.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3396
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7D1F.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:964
    • C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe
      "C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe"
      2⤵
        PID:4228
      • C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe
        "C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe"
        2⤵
          PID:1152
        • C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe
          "C:\Users\Admin\AppData\Local\Temp\472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1.exe"
          2⤵
          • Checks computer location settings
          • Adds Run key to start application
          • Suspicious use of WriteProcessMemory
          PID:2848
          • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
            "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
            3⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3032
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GxGUIRTmI.exe"
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1632
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAAD6.tmp"
              4⤵
              • Creates scheduled task(s)
              PID:3584
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
              4⤵
              • Executes dropped EXE
              PID:3056
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
              4⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of SetThreadContext
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of WriteProcessMemory
              PID:3604
              • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\lefkxkakaaqdjolovkwcl"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                PID:4936
              • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\vhldyclmoiiqtczsmvjdowpg"
                5⤵
                • Executes dropped EXE
                • Accesses Microsoft Outlook accounts
                PID:804
              • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\xbqvzuvfkqavwivwwgwxzjjpaaq"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2396

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            powershell.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
            • Size 2KB
            • SHA256 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
            • MD5 SHA1 SHA512

            StartupProfileData-NonInteractive

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
            • Size 18KB
            • SHA256 a4120d537af21eb447de8a4e3bd26f4aa24a444f0ae2a9ac0e7bd37200eb0456
            • MD5 SHA1 SHA512 SSDEEP

            __PSScriptPolicyTest_w2315gnf.1h4.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w2315gnf.1h4.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            lefkxkakaaqdjolovkwcl

            • Path C:\Users\Admin\AppData\Local\Temp\lefkxkakaaqdjolovkwcl
            • Size 4KB
            • SHA256 41fcf3117cab8796adc9854cf66a6533fc2766f0e36abdaf04ce5fd7c13f5a50
            • MD5 SHA1 SHA512 SSDEEP

            tmp7D1F.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmp7D1F.tmp
            • Size 1KB
            • SHA256 ac367c619196cb70ffbd63177fd7727a0cf65438ed0a2696a9a5907752580a34
            • MD5 SHA1 SHA512

            remcos.exe

            • Path C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
            • Size 1.1MB
            • SHA256 472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1
            • MD5 SHA1 SHA512 SSDEEP

            memory/804-127-0x0000000000400000-0x0000000000462000-memory.dmp

            memory/804-126-0x0000000000400000-0x0000000000462000-memory.dmp

            memory/804-123-0x0000000000400000-0x0000000000462000-memory.dmp

            memory/1632-119-0x0000000007E90000-0x0000000007EA4000-memory.dmp

            memory/1632-110-0x00000000078F0000-0x0000000007993000-memory.dmp

            memory/1632-100-0x0000000073D70000-0x0000000073DBC000-memory.dmp

            memory/1632-99-0x0000000006970000-0x00000000069BC000-memory.dmp

            memory/1632-97-0x0000000006470000-0x00000000067C4000-memory.dmp

            memory/2396-135-0x0000000000400000-0x0000000000424000-memory.dmp

            memory/2396-132-0x0000000000400000-0x0000000000424000-memory.dmp

            memory/2396-129-0x0000000000400000-0x0000000000424000-memory.dmp

            memory/2848-21-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/2848-22-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/2848-20-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/2848-25-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/2848-50-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3396-18-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/3396-17-0x0000000005160000-0x0000000005788000-memory.dmp

            memory/3396-49-0x00000000059F0000-0x0000000005D44000-memory.dmp

            memory/3396-34-0x0000000005870000-0x00000000058D6000-memory.dmp

            memory/3396-28-0x0000000005800000-0x0000000005866000-memory.dmp

            memory/3396-27-0x0000000005120000-0x0000000005142000-memory.dmp

            memory/3396-51-0x0000000005ED0000-0x0000000005EEE000-memory.dmp

            memory/3396-52-0x0000000005F80000-0x0000000005FCC000-memory.dmp

            memory/3396-53-0x0000000006EA0000-0x0000000006ED2000-memory.dmp

            memory/3396-54-0x0000000071A50000-0x0000000071A9C000-memory.dmp

            memory/3396-64-0x0000000006480000-0x000000000649E000-memory.dmp

            memory/3396-65-0x0000000006EE0000-0x0000000006F83000-memory.dmp

            memory/3396-66-0x0000000007840000-0x0000000007EBA000-memory.dmp

            memory/3396-67-0x0000000007200000-0x000000000721A000-memory.dmp

            memory/3396-68-0x0000000007270000-0x000000000727A000-memory.dmp

            memory/3396-69-0x0000000007480000-0x0000000007516000-memory.dmp

            memory/3396-70-0x0000000007400000-0x0000000007411000-memory.dmp

            memory/3396-71-0x0000000007430000-0x000000000743E000-memory.dmp

            memory/3396-72-0x0000000007440000-0x0000000007454000-memory.dmp

            memory/3396-73-0x0000000007540000-0x000000000755A000-memory.dmp

            memory/3396-74-0x0000000007520000-0x0000000007528000-memory.dmp

            memory/3396-77-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/3396-19-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/3396-14-0x00000000025C0000-0x00000000025F6000-memory.dmp

            memory/3396-15-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/3604-112-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-117-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-84-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-86-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-85-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-151-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-111-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-150-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-114-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-113-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-115-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-138-0x0000000010000000-0x0000000010019000-memory.dmp

            memory/3604-118-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-148-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-149-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-147-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-146-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-144-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-145-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-143-0x0000000000400000-0x0000000000482000-memory.dmp

            memory/3604-141-0x0000000010000000-0x0000000010019000-memory.dmp

            memory/3604-142-0x0000000010000000-0x0000000010019000-memory.dmp

            memory/4916-4-0x0000000004F20000-0x0000000004F2A000-memory.dmp

            memory/4916-7-0x0000000004F10000-0x0000000004F20000-memory.dmp

            memory/4916-2-0x0000000005610000-0x0000000005BB4000-memory.dmp

            memory/4916-1-0x0000000000400000-0x0000000000524000-memory.dmp

            memory/4916-9-0x0000000008360000-0x00000000083FC000-memory.dmp

            memory/4916-0-0x00000000752AE000-0x00000000752AF000-memory.dmp

            memory/4916-3-0x0000000004F70000-0x0000000005002000-memory.dmp

            memory/4916-26-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/4916-5-0x00000000752A0000-0x0000000075A50000-memory.dmp

            memory/4916-6-0x0000000004F30000-0x0000000004F4A000-memory.dmp

            memory/4916-8-0x0000000005D50000-0x0000000005E10000-memory.dmp

            memory/4936-120-0x0000000000400000-0x0000000000478000-memory.dmp

            memory/4936-128-0x0000000000400000-0x0000000000478000-memory.dmp

            memory/4936-125-0x0000000000400000-0x0000000000478000-memory.dmp