Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-09-2024 22:35

General

  • Target

    TNT invoice.exe

  • Size

    883KB

  • MD5

    054306ece8b6f161c94e7cb68d8bd9e6

  • SHA1

    5b49d309162f9308baa6aa4e85931c85ec3eb909

  • SHA256

    f9f95960ec195d7f883e4b3d5d75c26cd9f7dc7fbe8eef76d493ab6cc149e898

  • SHA512

    f1ee8d8f986ef4e5b30ac8f9b262243e93cade9267b3c024d2b5787d6c5bc87b8eadb5200c5f65959f969c57b735b2446093b8891da066042cd413f489e62ca6

  • SSDEEP

    24576:paUd4rdMqIdKWA5RUzENN1UcrZT216UHSF698lLUE7zvkE:TyrdlUzEjxZT2HIlLk

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.

  • 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 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 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.

  • 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 use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 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:3056
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\osuEcT.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:940
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\osuEcT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC544.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4624
    • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
      "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
      2⤵
        PID:1820
      • 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:1768
        • 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:1624
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\osuEcT.exe"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3340
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\osuEcT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFA8C.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:944
          • C:\ProgramData\Remcos\remcos.exe
            "C:\ProgramData\Remcos\remcos.exe"
            4⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:4352

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Remcos\logs.dat

      Filesize

      144B

      MD5

      00ae653464ad2bfa880a6ea27d000b2f

      SHA1

      17e781476c152699f709d30235fb859009180134

      SHA256

      1cfb0a978556246d9557e81ec58fb03de2fab0f06239a9519da65ff8c7756d34

      SHA512

      ac1da629994e0772ee5d7d0451d0d0006433102cd0aade7c4c04856a60cdec9e2f1f083fed65c6be317a70a05a815ae90070d3622e0a014bf63efc0dd1cc4757

    • C:\ProgramData\Remcos\remcos.exe

      Filesize

      883KB

      MD5

      054306ece8b6f161c94e7cb68d8bd9e6

      SHA1

      5b49d309162f9308baa6aa4e85931c85ec3eb909

      SHA256

      f9f95960ec195d7f883e4b3d5d75c26cd9f7dc7fbe8eef76d493ab6cc149e898

      SHA512

      f1ee8d8f986ef4e5b30ac8f9b262243e93cade9267b3c024d2b5787d6c5bc87b8eadb5200c5f65959f969c57b735b2446093b8891da066042cd413f489e62ca6

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

      Filesize

      2KB

      MD5

      3d086a433708053f9bf9523e1d87a4e8

      SHA1

      b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

      SHA256

      6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

      SHA512

      931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

      Filesize

      18KB

      MD5

      79e1b353fbf28c365b96cc6312bb80a9

      SHA1

      500ca4c1294b55b5dec6d23d1ea5e277279d1118

      SHA256

      d25aa3c1b3d0adc35ff88799d4da15b9d564ad624bff7e2a167c42f1eff2c2ba

      SHA512

      71278a08c65cee250eaa74f299fc66ff38884d19f81d57ec79dc5ee06210020e3f2e7334a0185a76b2f6ab4a15c818f59cf50933963b774da2969c9314137b58

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dycetodt.xg5.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmpC544.tmp

      Filesize

      1KB

      MD5

      906e16c922e7795c8b89c58d9ef60dd6

      SHA1

      963bf4974a443dc1af988e8a1de31388565ed4d0

      SHA256

      74efb381a30264c36946d743da5ea8302d6e2a2587cebe6c2931710fc627c892

      SHA512

      93f5119f69207d49f36970227e81f19d4ff54652a3cb5d8d248e4a51cec207a2413fd9e3c6bf71d92ccd395c1382c8f58cf59ae34beac027c9b7261278637a48

    • memory/940-73-0x0000000007060000-0x0000000007074000-memory.dmp

      Filesize

      80KB

    • memory/940-54-0x00000000060D0000-0x0000000006102000-memory.dmp

      Filesize

      200KB

    • memory/940-72-0x0000000007050000-0x000000000705E000-memory.dmp

      Filesize

      56KB

    • memory/940-71-0x0000000007020000-0x0000000007031000-memory.dmp

      Filesize

      68KB

    • memory/940-70-0x00000000070A0000-0x0000000007136000-memory.dmp

      Filesize

      600KB

    • memory/940-75-0x0000000007140000-0x0000000007148000-memory.dmp

      Filesize

      32KB

    • memory/940-15-0x0000000004530000-0x0000000004566000-memory.dmp

      Filesize

      216KB

    • memory/940-17-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/940-19-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/940-18-0x0000000004D00000-0x0000000005328000-memory.dmp

      Filesize

      6.2MB

    • memory/940-69-0x0000000006E90000-0x0000000006E9A000-memory.dmp

      Filesize

      40KB

    • memory/940-67-0x0000000007460000-0x0000000007ADA000-memory.dmp

      Filesize

      6.5MB

    • memory/940-68-0x0000000006E20000-0x0000000006E3A000-memory.dmp

      Filesize

      104KB

    • memory/940-55-0x0000000070DA0000-0x0000000070DEC000-memory.dmp

      Filesize

      304KB

    • memory/940-65-0x0000000006AC0000-0x0000000006ADE000-memory.dmp

      Filesize

      120KB

    • memory/940-74-0x0000000007160000-0x000000000717A000-memory.dmp

      Filesize

      104KB

    • memory/940-66-0x0000000006AF0000-0x0000000006B93000-memory.dmp

      Filesize

      652KB

    • memory/940-51-0x0000000005570000-0x00000000058C4000-memory.dmp

      Filesize

      3.3MB

    • memory/940-78-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/940-29-0x0000000005500000-0x0000000005566000-memory.dmp

      Filesize

      408KB

    • memory/940-28-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/940-27-0x0000000005490000-0x00000000054F6000-memory.dmp

      Filesize

      408KB

    • memory/940-26-0x00000000053F0000-0x0000000005412000-memory.dmp

      Filesize

      136KB

    • memory/940-52-0x0000000005AF0000-0x0000000005B0E000-memory.dmp

      Filesize

      120KB

    • memory/940-53-0x0000000005BA0000-0x0000000005BEC000-memory.dmp

      Filesize

      304KB

    • memory/1768-20-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1768-22-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1768-30-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1768-50-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1768-21-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3056-8-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/3056-25-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/3056-10-0x0000000009640000-0x00000000096DC000-memory.dmp

      Filesize

      624KB

    • memory/3056-9-0x0000000007040000-0x0000000007100000-memory.dmp

      Filesize

      768KB

    • memory/3056-2-0x0000000005DB0000-0x0000000006354000-memory.dmp

      Filesize

      5.6MB

    • memory/3056-7-0x00000000748CE000-0x00000000748CF000-memory.dmp

      Filesize

      4KB

    • memory/3056-6-0x0000000006ED0000-0x0000000006EE0000-memory.dmp

      Filesize

      64KB

    • memory/3056-5-0x0000000005950000-0x000000000595A000-memory.dmp

      Filesize

      40KB

    • memory/3056-4-0x00000000748C0000-0x0000000075070000-memory.dmp

      Filesize

      7.7MB

    • memory/3056-3-0x00000000058A0000-0x0000000005932000-memory.dmp

      Filesize

      584KB

    • memory/3056-1-0x0000000000DC0000-0x0000000000EA2000-memory.dmp

      Filesize

      904KB

    • memory/3056-0-0x00000000748CE000-0x00000000748CF000-memory.dmp

      Filesize

      4KB

    • memory/3340-102-0x0000000006A40000-0x0000000006A8C000-memory.dmp

      Filesize

      304KB

    • memory/3340-113-0x00000000079A0000-0x0000000007A43000-memory.dmp

      Filesize

      652KB

    • memory/3340-96-0x00000000062F0000-0x0000000006644000-memory.dmp

      Filesize

      3.3MB

    • memory/3340-115-0x0000000007F50000-0x0000000007F64000-memory.dmp

      Filesize

      80KB

    • memory/3340-114-0x0000000007F10000-0x0000000007F21000-memory.dmp

      Filesize

      68KB

    • memory/3340-103-0x0000000073390000-0x00000000733DC000-memory.dmp

      Filesize

      304KB

    • memory/4352-119-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-128-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-85-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-116-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-117-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-90-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-121-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-124-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-126-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-88-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-129-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-84-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-136-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-137-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-144-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-145-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-152-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4352-153-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB