Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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.

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 2 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 8 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
    "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2276
    • 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:2964
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCBA8.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2536
    • C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe
      "C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • 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:2648
        • 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:316
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFDEE.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1612
        • 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:340
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygbdgssuimrqkwkix"
            5⤵
            • Executes dropped EXE
            PID:1520
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygbdgssuimrqkwkix"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:3044
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\jjhohldnwujvucymoqid"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:828
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ldugadwpscbawquqxbvezait"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    18015d8c9da0a1966db656d4de9bd1cc

    SHA1

    345e1a17ef670ca173fbf5eb2b315f14aaf5d557

    SHA256

    e69359c19c0dcb4ce51149c8a0116a4db228fc5312bb4953582fcb4e1697ef30

    SHA512

    718bf9d6aa18b8f7089ca5a2ef413fa6fe31a245399e7a92f60bf10c0ac3c1a1f821b843e978ce2db84e2f5b8b331415543d6751d2fdf4ee005b528ffb843696

  • C:\Users\Admin\AppData\Local\Temp\tmpCBA8.tmp

    Filesize

    1KB

    MD5

    54823fba084d011bb0634ff5e49ba459

    SHA1

    c7f415aa06a1f3d6bdf01d6f8ccd1a1c04d7d9d0

    SHA256

    bb43787dacfa80f088c78098d2a21869b4c382e944055c664ab48e8da00335e0

    SHA512

    9304332b3d8710acb75590212b1ff3e801b21f64708edc3c6280c82c9d0d62cd8235633850754016860f676891e43a62b254e26400e75387763bcf25516addab

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    eada1c0263836d986d66438b65881663

    SHA1

    611b5345ffa58a1b70d3697606833c5a0753c4e5

    SHA256

    932f8be51405cc61c6617850b6e13acae00e0606319245c2a23f64e3ae545bce

    SHA512

    8811416c671c3392aa7ba34e4d5b0858e35020a205c174f92b1f5856432d068cb9cedb94151b058b5d1d71635ac0538a75c5d669f9b41f83dc3220779d3bb4f1

  • \ProgramData\Remcos\remcos.exe

    Filesize

    962KB

    MD5

    36a61907068929b0cea9cfad4bb45b5f

    SHA1

    564d7d74f94fe07b5590a6c17b0caad3536c61c6

    SHA256

    b041b54fdd8bac5ca781c5b064235a29cc29480edb623a216a2a3d8aef71ea16

    SHA512

    6e3f7cc4d0995c7937049cde030f983ca0d80afdf08dfa3defb14a6778349ae8296ee950407f5f0a1e42eb32122aa8a9b104a40a4f7171fd2c6c162896e2fc1d

  • memory/340-87-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-88-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-83-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-81-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-80-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-79-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-63-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/340-66-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-72-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/340-67-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/440-102-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/440-104-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/440-100-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/828-97-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/828-103-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/828-95-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1948-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1948-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-12-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1948-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2276-0-0x00000000747EE000-0x00000000747EF000-memory.dmp

    Filesize

    4KB

  • memory/2276-3-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB

  • memory/2276-4-0x00000000747EE000-0x00000000747EF000-memory.dmp

    Filesize

    4KB

  • memory/2276-1-0x0000000000B90000-0x0000000000C86000-memory.dmp

    Filesize

    984KB

  • memory/2276-5-0x00000000747E0000-0x0000000074ECE000-memory.dmp

    Filesize

    6.9MB

  • memory/2276-6-0x0000000006120000-0x00000000061E0000-memory.dmp

    Filesize

    768KB

  • memory/2276-41-0x00000000747E0000-0x0000000074ECE000-memory.dmp

    Filesize

    6.9MB

  • memory/2276-2-0x00000000747E0000-0x0000000074ECE000-memory.dmp

    Filesize

    6.9MB

  • memory/2648-44-0x0000000000AA0000-0x0000000000B96000-memory.dmp

    Filesize

    984KB

  • memory/3044-93-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3044-90-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/3044-91-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3044-98-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB