Analysis

  • max time kernel
    149s
  • max time network
    147s
  • 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 04:39

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 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).

  • 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 14 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 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:4884
    • 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:4108
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA95F.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2692
    • 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:3540
      • 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:3504
        • 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:3160
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE0CB.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:4044
        • 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:2904
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dmrljfdebxkjapttuaztgxbnle"
            5⤵
            • Executes dropped EXE
            PID:3640
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dmrljfdebxkjapttuaztgxbnle"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:3728
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\nowdkxoxpfcocwhxdllnjkneusjecm"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1680
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\qibokqgzdnutmkdbvwyouwindzbnvxjnd"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    04bde61f1eeaafd832c2df5362f837e6

    SHA1

    fc6897769355da1ffd7450506e0db20c53cad449

    SHA256

    72406a585c64837528ba3a276a89d8743ea8a97868135f4e3da08458761b5203

    SHA512

    dec6f1f75e89f2ddeaa7aa9dcfcbb9e39c5e5ba57c6f453e71843e3edb05d96fc4083f1bd5d4102155673190aa9938dc0ffc82b7027672719e7b80468a3ce0e8

  • 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

    73f03782177f31a09af959a6c346bab3

    SHA1

    f18c7141a64cec0bd4963094e6e000a63becbccb

    SHA256

    f2139bda886896491667daefa4a2eca25725a9916fec1457e63a393204a3cd07

    SHA512

    e9d60899b910e4db7ea0f9a256b8accabf6aac17917338c08403311ac5fe041ed6d2f7458fd2c19424ea5d6e5091b6cfa30b251ed4b33f278b5e2307f700798a

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l4skhosf.pwd.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    16f4f7c4051f4bbdaa93a1ca80690065

    SHA1

    750cacbdd2d089a88119374560d6ac004954e90e

    SHA256

    6c4559e4413cccaeab73cad48ffd804506c95566e4d6a3f5ae64017a33ea6ec2

    SHA512

    cb0f68d393ad03a5c802a2978ff7b12e20911bac5e27200c2df16d5d3f63dfc2387c0cd1a9075d8e4ba9ae804a6b61225575e2f42b3ef024e863d5b172417964

  • C:\Users\Admin\AppData\Local\Temp\tmpA95F.tmp

    Filesize

    1KB

    MD5

    e525cdbae68260e7b8834df4b8664547

    SHA1

    166d89195d47afbd887972797f80d023479dd9ba

    SHA256

    03e9b007f2714ceef5cfe84ddcd45838056c87bcdb0f0aba563e17010ff6876f

    SHA512

    75c040e27e874318dfa659db606b08f536a7533da08677a72d2f988aac04aece09fc50a0a80a68af9f65aeb3c7b68582b874e1f701231c1637003bcfdce33c57

  • memory/1680-131-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1680-135-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1680-133-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2904-149-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2904-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-170-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-151-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-150-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2904-169-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-146-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2904-161-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-88-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-178-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-162-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-153-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-155-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-117-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-152-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-90-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-118-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-156-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-177-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-119-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-126-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2904-124-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3160-102-0x00000000068F0000-0x000000000693C000-memory.dmp

    Filesize

    304KB

  • memory/3160-100-0x0000000005EC0000-0x0000000006214000-memory.dmp

    Filesize

    3.3MB

  • memory/3160-113-0x00000000075B0000-0x0000000007653000-memory.dmp

    Filesize

    652KB

  • memory/3160-115-0x00000000078B0000-0x00000000078C4000-memory.dmp

    Filesize

    80KB

  • memory/3160-114-0x0000000007870000-0x0000000007881000-memory.dmp

    Filesize

    68KB

  • memory/3160-103-0x0000000071CF0000-0x0000000071D3C000-memory.dmp

    Filesize

    304KB

  • memory/3540-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3540-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3540-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3540-21-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3540-23-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3728-128-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3728-130-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3728-134-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4108-75-0x0000000007B20000-0x0000000007B28000-memory.dmp

    Filesize

    32KB

  • memory/4108-17-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4108-15-0x0000000002B90000-0x0000000002BC6000-memory.dmp

    Filesize

    216KB

  • memory/4108-74-0x0000000007B40000-0x0000000007B5A000-memory.dmp

    Filesize

    104KB

  • memory/4108-73-0x0000000007A40000-0x0000000007A54000-memory.dmp

    Filesize

    80KB

  • memory/4108-72-0x0000000007A30000-0x0000000007A3E000-memory.dmp

    Filesize

    56KB

  • memory/4108-71-0x0000000007A00000-0x0000000007A11000-memory.dmp

    Filesize

    68KB

  • memory/4108-70-0x0000000007A80000-0x0000000007B16000-memory.dmp

    Filesize

    600KB

  • memory/4108-69-0x0000000007870000-0x000000000787A000-memory.dmp

    Filesize

    40KB

  • memory/4108-68-0x0000000007800000-0x000000000781A000-memory.dmp

    Filesize

    104KB

  • memory/4108-67-0x0000000007E40000-0x00000000084BA000-memory.dmp

    Filesize

    6.5MB

  • memory/4108-66-0x00000000074D0000-0x0000000007573000-memory.dmp

    Filesize

    652KB

  • memory/4108-65-0x0000000006A80000-0x0000000006A9E000-memory.dmp

    Filesize

    120KB

  • memory/4108-55-0x0000000071D50000-0x0000000071D9C000-memory.dmp

    Filesize

    304KB

  • memory/4108-54-0x0000000007490000-0x00000000074C2000-memory.dmp

    Filesize

    200KB

  • memory/4108-25-0x0000000005520000-0x0000000005542000-memory.dmp

    Filesize

    136KB

  • memory/4108-26-0x0000000005640000-0x00000000056A6000-memory.dmp

    Filesize

    408KB

  • memory/4108-53-0x0000000006510000-0x000000000655C000-memory.dmp

    Filesize

    304KB

  • memory/4108-78-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4108-19-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4108-52-0x00000000064D0000-0x00000000064EE000-memory.dmp

    Filesize

    120KB

  • memory/4108-30-0x0000000005E50000-0x00000000061A4000-memory.dmp

    Filesize

    3.3MB

  • memory/4108-18-0x0000000005820000-0x0000000005E48000-memory.dmp

    Filesize

    6.2MB

  • memory/4108-20-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4108-27-0x0000000005760000-0x00000000057C6000-memory.dmp

    Filesize

    408KB

  • memory/4756-142-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4756-136-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4756-141-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4884-9-0x0000000007C30000-0x0000000007CF0000-memory.dmp

    Filesize

    768KB

  • memory/4884-0-0x000000007466E000-0x000000007466F000-memory.dmp

    Filesize

    4KB

  • memory/4884-10-0x000000000A360000-0x000000000A3FC000-memory.dmp

    Filesize

    624KB

  • memory/4884-31-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4884-8-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4884-7-0x000000007466E000-0x000000007466F000-memory.dmp

    Filesize

    4KB

  • memory/4884-6-0x00000000052C0000-0x00000000052D0000-memory.dmp

    Filesize

    64KB

  • memory/4884-5-0x0000000074660000-0x0000000074E10000-memory.dmp

    Filesize

    7.7MB

  • memory/4884-4-0x0000000004F90000-0x0000000004F9A000-memory.dmp

    Filesize

    40KB

  • memory/4884-3-0x0000000004E00000-0x0000000004E92000-memory.dmp

    Filesize

    584KB

  • memory/4884-2-0x00000000052D0000-0x0000000005874000-memory.dmp

    Filesize

    5.6MB

  • memory/4884-1-0x0000000000310000-0x0000000000406000-memory.dmp

    Filesize

    984KB