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Analysis

  • max time kernel
    150s
  • 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
    16/09/2024, 05:36

General

  • Target

    TNT INVOICE 9.16.2024.exe

  • Size

    874KB

  • MD5

    fa85476ee938c50ec297a18b6d84ad2d

  • SHA1

    24687b69c21fdcc298fbc977548fcd34f1e7d8ee

  • SHA256

    4dd5c06062753a3522e3a1bb4a10d29639b467599913a27d77af2866dd095a32

  • SHA512

    7a486263b9de67d94b7d90c2e60c285cceaa8bfa0fb825b6aee6eafe753178316bf051b877ee797509becf59617246cea5cbcba2804fbb7f1252248508121758

  • SSDEEP

    24576:OEqKo59aqP71pME/qVt4G0PWxxtO6rO69qCVJFOxGoF:OE38bPQRVatPAA6rO6Fb

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 10 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TNT INVOICE 9.16.2024.exe
    "C:\Users\Admin\AppData\Local\Temp\TNT INVOICE 9.16.2024.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4080
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fiCAFOzLq.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4188
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fiCAFOzLq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCB64.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1920
    • C:\Users\Admin\AppData\Local\Temp\TNT INVOICE 9.16.2024.exe
      "C:\Users\Admin\AppData\Local\Temp\TNT INVOICE 9.16.2024.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4696
      • 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 use of WriteProcessMemory
        PID:2780
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fiCAFOzLq.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4164
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fiCAFOzLq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp197.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:4840
        • 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:2592
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ssiiklxpfxoqeptdzkyztm"
            5⤵
            • Executes dropped EXE
            PID:4492
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ssiiklxpfxoqeptdzkyztm"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:4496
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dvnbceirsfgvgvphqvlbeqlbs"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:4480
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fpttdwslgnyzqbdlagxugdyksuoq"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2560

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    691637f5479264d8be4cb906d3843090

    SHA1

    05988dd72171be48dc72e6eff20e8c91568989a0

    SHA256

    c7f32cee57e257160dc0f2d650db44685e3e1144c206cedfc5d45e224ac6882a

    SHA512

    eb33e253d1ffda33ec42b9a997d9914c96f9a6a6d1534cf84f95e008e07f40f8650ab173c8cf43ebdf640e60cc3338682465325ca78ffa68bfccc7b0b189d67f

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    874KB

    MD5

    fa85476ee938c50ec297a18b6d84ad2d

    SHA1

    24687b69c21fdcc298fbc977548fcd34f1e7d8ee

    SHA256

    4dd5c06062753a3522e3a1bb4a10d29639b467599913a27d77af2866dd095a32

    SHA512

    7a486263b9de67d94b7d90c2e60c285cceaa8bfa0fb825b6aee6eafe753178316bf051b877ee797509becf59617246cea5cbcba2804fbb7f1252248508121758

  • 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

    946732c59836f5dbd830aece60dd496e

    SHA1

    0ab9b3b27532e6d92e118fd8c534367586b5dff9

    SHA256

    90facc99cb9e651e0a53bec46221301467eba7835327a75723c6af368346b9a8

    SHA512

    410550a6067f10fa66a0ca4c9016c03793ceaeb5b5df9feff563794fedb887e1dccecf1968791f5b0521f21e4fa9ef5a3af921fa6f4fbf6263f4178a2a19e3f7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5ynmfwl5.ion.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    2538ec9e8425a905937573069b77d4c2

    SHA1

    ad0c2b7aff4382e23444d26adac96d9697b849f3

    SHA256

    29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

    SHA512

    a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

  • C:\Users\Admin\AppData\Local\Temp\tmpCB64.tmp

    Filesize

    1KB

    MD5

    4e91c306616c581c813dfb7347d9b195

    SHA1

    dd60dc099a76f683a5fe2fecf11f88785072fea7

    SHA256

    eb2081a1f09bf2422095b3f7c3475da513be5c4f554b1e1096ee3675d6dd7913

    SHA512

    f03a83c21a8d5b371096efac21dcba905f7579d4fd1e9f222db6e6f2116c9a8a433317de093014a92b9ec150a194449770449517543d5bab96b440b6bc5944a5

  • memory/2560-135-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2560-137-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2560-138-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2592-120-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-178-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-153-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-152-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-150-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2592-151-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2592-147-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2592-161-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-127-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-126-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-122-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-177-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-170-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-169-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-154-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-119-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-117-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-162-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-102-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-86-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-89-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2592-116-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4080-9-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4080-5-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4080-10-0x00000000078B0000-0x0000000007970000-memory.dmp

    Filesize

    768KB

  • memory/4080-1-0x0000000000F40000-0x0000000001020000-memory.dmp

    Filesize

    896KB

  • memory/4080-2-0x0000000005FC0000-0x0000000006564000-memory.dmp

    Filesize

    5.6MB

  • memory/4080-3-0x0000000005A10000-0x0000000005AA2000-memory.dmp

    Filesize

    584KB

  • memory/4080-4-0x00000000059B0000-0x00000000059BA000-memory.dmp

    Filesize

    40KB

  • memory/4080-0-0x00000000745FE000-0x00000000745FF000-memory.dmp

    Filesize

    4KB

  • memory/4080-41-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4080-11-0x0000000009EF0000-0x0000000009F8C000-memory.dmp

    Filesize

    624KB

  • memory/4080-8-0x00000000745FE000-0x00000000745FF000-memory.dmp

    Filesize

    4KB

  • memory/4080-6-0x0000000007350000-0x0000000007424000-memory.dmp

    Filesize

    848KB

  • memory/4080-7-0x0000000005D80000-0x0000000005D8E000-memory.dmp

    Filesize

    56KB

  • memory/4164-103-0x0000000005D80000-0x0000000005DCC000-memory.dmp

    Filesize

    304KB

  • memory/4164-118-0x0000000007270000-0x0000000007284000-memory.dmp

    Filesize

    80KB

  • memory/4164-115-0x0000000007220000-0x0000000007231000-memory.dmp

    Filesize

    68KB

  • memory/4164-100-0x0000000005750000-0x0000000005AA4000-memory.dmp

    Filesize

    3.3MB

  • memory/4164-114-0x0000000006F90000-0x0000000007033000-memory.dmp

    Filesize

    652KB

  • memory/4164-104-0x00000000730C0000-0x000000007310C000-memory.dmp

    Filesize

    304KB

  • memory/4188-22-0x0000000005620000-0x0000000005686000-memory.dmp

    Filesize

    408KB

  • memory/4188-56-0x00000000709B0000-0x00000000709FC000-memory.dmp

    Filesize

    304KB

  • memory/4188-79-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4188-53-0x0000000006510000-0x000000000652E000-memory.dmp

    Filesize

    120KB

  • memory/4188-72-0x0000000007A50000-0x0000000007A61000-memory.dmp

    Filesize

    68KB

  • memory/4188-75-0x0000000007B90000-0x0000000007BAA000-memory.dmp

    Filesize

    104KB

  • memory/4188-54-0x0000000006540000-0x000000000658C000-memory.dmp

    Filesize

    304KB

  • memory/4188-74-0x0000000007A90000-0x0000000007AA4000-memory.dmp

    Filesize

    80KB

  • memory/4188-30-0x0000000005F30000-0x0000000006284000-memory.dmp

    Filesize

    3.3MB

  • memory/4188-21-0x0000000005580000-0x00000000055A2000-memory.dmp

    Filesize

    136KB

  • memory/4188-55-0x00000000074F0000-0x0000000007522000-memory.dmp

    Filesize

    200KB

  • memory/4188-23-0x0000000005E80000-0x0000000005EE6000-memory.dmp

    Filesize

    408KB

  • memory/4188-26-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4188-76-0x0000000007B70000-0x0000000007B78000-memory.dmp

    Filesize

    32KB

  • memory/4188-71-0x0000000007AD0000-0x0000000007B66000-memory.dmp

    Filesize

    600KB

  • memory/4188-67-0x0000000007730000-0x00000000077D3000-memory.dmp

    Filesize

    652KB

  • memory/4188-16-0x0000000004F80000-0x0000000004FB6000-memory.dmp

    Filesize

    216KB

  • memory/4188-73-0x0000000007A80000-0x0000000007A8E000-memory.dmp

    Filesize

    56KB

  • memory/4188-66-0x0000000006AD0000-0x0000000006AEE000-memory.dmp

    Filesize

    120KB

  • memory/4188-70-0x00000000078C0000-0x00000000078CA000-memory.dmp

    Filesize

    40KB

  • memory/4188-17-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4188-68-0x0000000007EA0000-0x000000000851A000-memory.dmp

    Filesize

    6.5MB

  • memory/4188-69-0x0000000007850000-0x000000000786A000-memory.dmp

    Filesize

    104KB

  • memory/4188-20-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4188-18-0x00000000056A0000-0x0000000005CC8000-memory.dmp

    Filesize

    6.2MB

  • memory/4480-131-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4480-134-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4480-140-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4496-129-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4496-139-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4496-133-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4696-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4696-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4696-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4696-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4696-27-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB