Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-09-2024 07:35

General

  • Target

    TNT invoice.exe

  • Size

    962KB

  • MD5

    36a61907068929b0cea9cfad4bb45b5f

  • SHA1

    564d7d74f94fe07b5590a6c17b0caad3536c61c6

  • SHA256

    b041b54fdd8bac5ca781c5b064235a29cc29480edb623a216a2a3d8aef71ea16

  • SHA512

    6e3f7cc4d0995c7937049cde030f983ca0d80afdf08dfa3defb14a6778349ae8296ee950407f5f0a1e42eb32122aa8a9b104a40a4f7171fd2c6c162896e2fc1d

  • SSDEEP

    24576:OkGY2eTMCq/oDIALSR7mD60noFfzE5BG:PAeTw/oDnWoD6GoBE5E

Malware Config

Extracted

Family

remcos

Botnet

IRN

C2

irnserv1.ddns.net:4424

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

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-CA8761

  • 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 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 5 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).

  • System Location Discovery: System Language Discovery 1 TTPs 11 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
    "C:\Users\Admin\AppData\Local\Temp\TNT invoice.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:4732
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GpYKIf.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4960
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9683.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4428
    • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
      "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
      2⤵
        PID:3212
      • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
        "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
        2⤵
          PID:1704
        • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
          "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
          2⤵
          • Checks computer location settings
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2800
          • C:\ProgramData\Remcos\remcos.exe
            "C:\ProgramData\Remcos\remcos.exe"
            3⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:5040
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GpYKIf.exe"
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3048
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCBFB.tmp"
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:3488
            • C:\ProgramData\Remcos\remcos.exe
              "C:\ProgramData\Remcos\remcos.exe"
              4⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4464
              • C:\ProgramData\Remcos\remcos.exe
                C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\bwobud"
                5⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                PID:1296
              • C:\ProgramData\Remcos\remcos.exe
                C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dqtuuwrfh"
                5⤵
                • Executes dropped EXE
                • Accesses Microsoft Outlook accounts
                • System Location Discovery: System Language Discovery
                PID:1904
              • C:\ProgramData\Remcos\remcos.exe
                C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\oshfvobgvjjt"
                5⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2688

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\Remcos\logs.dat

        Filesize

        144B

        MD5

        116dbcc8376a60cf3ba9128894aefca9

        SHA1

        6a5321d8d207d130b1c2946948d9b0ab45f758d8

        SHA256

        5d12679a84bba444611de8f9e3fada24175e16c4a2e8ce42ed37ab09569316af

        SHA512

        a1d115db1d2ac3ea4b932fd6825c555c3f7b3cf01cd857f959886403260aebbb6d4c963e8642b885fd79dc14e4839d93a1a15fa7dd7c9ba4baa46a48b58a6f05

      • C:\ProgramData\Remcos\remcos.exe

        Filesize

        962KB

        MD5

        36a61907068929b0cea9cfad4bb45b5f

        SHA1

        564d7d74f94fe07b5590a6c17b0caad3536c61c6

        SHA256

        b041b54fdd8bac5ca781c5b064235a29cc29480edb623a216a2a3d8aef71ea16

        SHA512

        6e3f7cc4d0995c7937049cde030f983ca0d80afdf08dfa3defb14a6778349ae8296ee950407f5f0a1e42eb32122aa8a9b104a40a4f7171fd2c6c162896e2fc1d

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

        Filesize

        2KB

        MD5

        968cb9309758126772781b83adb8a28f

        SHA1

        8da30e71accf186b2ba11da1797cf67f8f78b47c

        SHA256

        92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

        SHA512

        4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

        Filesize

        18KB

        MD5

        9d9c26b9fe217b1fd1108d64b17a874c

        SHA1

        9895586a5dd085b8e35e5c1ae5a1fa59a5ec9b59

        SHA256

        c4dc04e35c67aaf0fd67d1bf094872c60b72db98c3a285b7fd88d5663ac1d107

        SHA512

        e3edb95ebd33ce25e2c96d43221b3a4972827242aafe93146ebdaa3bba913ed1487aee6f1a3207a30ba663e88362609f8ae6a634f06b685d87fe86bc37a1a5df

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gwxoafvt.0sc.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        4KB

        MD5

        ea01dd92b15d2f570f6b167dad2d1fd0

        SHA1

        7b89141d4c3eb2f29d096f28a9bfe66eb006224a

        SHA256

        0515f49138d74283f9ac1042fd1a384f715b74c2b99193454dbb0cd585097727

        SHA512

        0e7695aea30250a41829fa4abb681b8c3ed4c0955e18f1f9f3a5456bfb3a76f016f538e557bf29b99ab6ab48c846f9fa3c4bccd8cb5fe73099a81b5946029ec8

      • C:\Users\Admin\AppData\Local\Temp\tmp9683.tmp

        Filesize

        1KB

        MD5

        28f89cf850ff05ea427da37a2da82d2e

        SHA1

        58f6e7a8d896067c8199e35e29d2f1307052ef84

        SHA256

        503748d3b2076f1eee498609d2c280ed46b89866552e3a2dc8e696365cea0f39

        SHA512

        fbf799e9136067985329b698c22f0908ce3c5706d62606fea58c80f88ccd8a8067973a1ca054c30b1f3ec310a2f81ed6ccbeaae52cc73fd16837a2bde6ce2657

      • memory/1296-134-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/1296-127-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/1296-131-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/1904-132-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/1904-129-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/1904-133-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2688-137-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2688-141-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2688-135-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2800-25-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2800-52-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2800-27-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2800-28-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2800-20-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/3048-102-0x00000000069A0000-0x00000000069EC000-memory.dmp

        Filesize

        304KB

      • memory/3048-117-0x0000000007A60000-0x0000000007A74000-memory.dmp

        Filesize

        80KB

      • memory/3048-114-0x0000000007A20000-0x0000000007A31000-memory.dmp

        Filesize

        68KB

      • memory/3048-113-0x0000000007720000-0x00000000077C3000-memory.dmp

        Filesize

        652KB

      • memory/3048-103-0x00000000713D0000-0x000000007141C000-memory.dmp

        Filesize

        304KB

      • memory/3048-100-0x0000000005F90000-0x00000000062E4000-memory.dmp

        Filesize

        3.3MB

      • memory/4464-149-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4464-145-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4464-148-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4464-150-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-154-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-126-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-125-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-124-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-122-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-120-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-121-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-119-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-155-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-116-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-115-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-162-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-163-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-170-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-171-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-88-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-84-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-85-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-90-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-178-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4464-179-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/4732-35-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4732-9-0x00000000086E0000-0x00000000087A0000-memory.dmp

        Filesize

        768KB

      • memory/4732-1-0x0000000000DA0000-0x0000000000E96000-memory.dmp

        Filesize

        984KB

      • memory/4732-2-0x0000000005F90000-0x0000000006534000-memory.dmp

        Filesize

        5.6MB

      • memory/4732-3-0x00000000058A0000-0x0000000005932000-memory.dmp

        Filesize

        584KB

      • memory/4732-4-0x0000000005890000-0x000000000589A000-memory.dmp

        Filesize

        40KB

      • memory/4732-5-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4732-6-0x0000000005F50000-0x0000000005F60000-memory.dmp

        Filesize

        64KB

      • memory/4732-7-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

        Filesize

        4KB

      • memory/4732-8-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4732-10-0x000000000AE00000-0x000000000AE9C000-memory.dmp

        Filesize

        624KB

      • memory/4732-0-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

        Filesize

        4KB

      • memory/4960-65-0x0000000006980000-0x000000000699E000-memory.dmp

        Filesize

        120KB

      • memory/4960-55-0x0000000070F40000-0x0000000070F8C000-memory.dmp

        Filesize

        304KB

      • memory/4960-54-0x0000000006920000-0x0000000006952000-memory.dmp

        Filesize

        200KB

      • memory/4960-53-0x0000000006380000-0x00000000063CC000-memory.dmp

        Filesize

        304KB

      • memory/4960-51-0x0000000006330000-0x000000000634E000-memory.dmp

        Filesize

        120KB

      • memory/4960-23-0x0000000005C70000-0x0000000005CD6000-memory.dmp

        Filesize

        408KB

      • memory/4960-40-0x0000000005D50000-0x00000000060A4000-memory.dmp

        Filesize

        3.3MB

      • memory/4960-66-0x0000000007540000-0x00000000075E3000-memory.dmp

        Filesize

        652KB

      • memory/4960-24-0x0000000005CE0000-0x0000000005D46000-memory.dmp

        Filesize

        408KB

      • memory/4960-22-0x0000000005480000-0x00000000054A2000-memory.dmp

        Filesize

        136KB

      • memory/4960-21-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4960-19-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4960-16-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4960-17-0x00000000054D0000-0x0000000005AF8000-memory.dmp

        Filesize

        6.2MB

      • memory/4960-15-0x0000000004DA0000-0x0000000004DD6000-memory.dmp

        Filesize

        216KB

      • memory/4960-67-0x0000000007CC0000-0x000000000833A000-memory.dmp

        Filesize

        6.5MB

      • memory/4960-78-0x0000000074C00000-0x00000000753B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4960-68-0x0000000007680000-0x000000000769A000-memory.dmp

        Filesize

        104KB

      • memory/4960-69-0x00000000076F0000-0x00000000076FA000-memory.dmp

        Filesize

        40KB

      • memory/4960-70-0x0000000007900000-0x0000000007996000-memory.dmp

        Filesize

        600KB

      • memory/4960-71-0x0000000007880000-0x0000000007891000-memory.dmp

        Filesize

        68KB

      • memory/4960-72-0x00000000078B0000-0x00000000078BE000-memory.dmp

        Filesize

        56KB

      • memory/4960-73-0x00000000078C0000-0x00000000078D4000-memory.dmp

        Filesize

        80KB

      • memory/4960-74-0x00000000079C0000-0x00000000079DA000-memory.dmp

        Filesize

        104KB

      • memory/4960-75-0x00000000079A0000-0x00000000079A8000-memory.dmp

        Filesize

        32KB