Analysis

  • max time kernel
    150s
  • 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
    26-09-2024 14:24

General

  • Target

    TNT invoice 9.26.2024 .exe

  • Size

    881KB

  • MD5

    7afd5be4b77090388ddecb8169cf0bc3

  • SHA1

    d3b6ba2e53aed1471c12196c577b7be56d14cf2f

  • SHA256

    68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

  • SHA512

    2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

  • SSDEEP

    24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb

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 3 IoCs
  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
    "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3176
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9431.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:516
    • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
      "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1112
      • 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:4216
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4920
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC9E7.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:3972
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:4668
        • 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:3480

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    fc9b799b1fd92b1e7f9c145ded0f9cae

    SHA1

    0c0082e9c142f8f5266094faace1a94c5165c7a8

    SHA256

    965841bc72460214d2cf77e46da9fc2ce97e1bc3390d2e6232bbb48e4ad84669

    SHA512

    06db99ad91bd5c8179d5bfd9f0e205d56a809adbbaa41926c740adad61db3a6c6af58b5bbc498c8c09936e3d9833c3ed8c53334075d972315c1cfdeff8495f32

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    881KB

    MD5

    7afd5be4b77090388ddecb8169cf0bc3

    SHA1

    d3b6ba2e53aed1471c12196c577b7be56d14cf2f

    SHA256

    68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

    SHA512

    2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

  • 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

    8eb8f5ae54e7dac105cdeb6de1bc71dc

    SHA1

    11578a98fc52b7c309fee12760ac210fe12303fd

    SHA256

    ce34ed10410e0d002d55fddd33785bb44dadf69dbe63616cb85f3621105ebfd7

    SHA512

    e0a51d6d7015c679551ec23a366e883470e31436c5d1124fd52526be02573a916bdf2f34c563e08c3b2c3863cf57f288cfa1731c76dc0085f63e131e8225297f

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cb14rfb2.dya.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp9431.tmp

    Filesize

    1KB

    MD5

    ec756958734c1538379ebefe0051326e

    SHA1

    4e68bcdd3a5ca64acad9f66155dfe8f0010dd6e9

    SHA256

    f71c296a6a4684db1b1861da235a6d3b9fc7d9160c9f2d1bd6c7f54d53e00b21

    SHA512

    3a1d5916de849ff8aad6f9e22d2653a99ecc9ec4a2a535137ed2459ad9ebd04ddba904770eac27a6e72f1e0e29d47f0c5f4fdadcedad34fc16ef1cb69a3160c2

  • memory/1112-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1112-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1112-21-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1112-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1112-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2164-5-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/2164-10-0x0000000008C60000-0x0000000008CFC000-memory.dmp

    Filesize

    624KB

  • memory/2164-9-0x00000000065B0000-0x0000000006670000-memory.dmp

    Filesize

    768KB

  • memory/2164-0-0x00000000748EE000-0x00000000748EF000-memory.dmp

    Filesize

    4KB

  • memory/2164-8-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/2164-7-0x00000000748EE000-0x00000000748EF000-memory.dmp

    Filesize

    4KB

  • memory/2164-6-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

    Filesize

    64KB

  • memory/2164-40-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/2164-4-0x0000000004BE0000-0x0000000004BEA000-memory.dmp

    Filesize

    40KB

  • memory/2164-3-0x0000000004B20000-0x0000000004BB2000-memory.dmp

    Filesize

    584KB

  • memory/2164-2-0x0000000004FD0000-0x0000000005574000-memory.dmp

    Filesize

    5.6MB

  • memory/2164-1-0x0000000000090000-0x0000000000172000-memory.dmp

    Filesize

    904KB

  • memory/3176-18-0x0000000005BE0000-0x0000000006208000-memory.dmp

    Filesize

    6.2MB

  • memory/3176-72-0x0000000007E40000-0x0000000007E4E000-memory.dmp

    Filesize

    56KB

  • memory/3176-39-0x00000000062F0000-0x0000000006644000-memory.dmp

    Filesize

    3.3MB

  • memory/3176-27-0x0000000006210000-0x0000000006276000-memory.dmp

    Filesize

    408KB

  • memory/3176-28-0x0000000006280000-0x00000000062E6000-memory.dmp

    Filesize

    408KB

  • memory/3176-20-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/3176-52-0x00000000068E0000-0x00000000068FE000-memory.dmp

    Filesize

    120KB

  • memory/3176-53-0x0000000006900000-0x000000000694C000-memory.dmp

    Filesize

    304KB

  • memory/3176-55-0x00000000710D0000-0x000000007111C000-memory.dmp

    Filesize

    304KB

  • memory/3176-54-0x00000000078D0000-0x0000000007902000-memory.dmp

    Filesize

    200KB

  • memory/3176-65-0x0000000007890000-0x00000000078AE000-memory.dmp

    Filesize

    120KB

  • memory/3176-66-0x0000000007910000-0x00000000079B3000-memory.dmp

    Filesize

    652KB

  • memory/3176-67-0x0000000008250000-0x00000000088CA000-memory.dmp

    Filesize

    6.5MB

  • memory/3176-68-0x0000000007C10000-0x0000000007C2A000-memory.dmp

    Filesize

    104KB

  • memory/3176-69-0x0000000007C80000-0x0000000007C8A000-memory.dmp

    Filesize

    40KB

  • memory/3176-70-0x0000000007E90000-0x0000000007F26000-memory.dmp

    Filesize

    600KB

  • memory/3176-71-0x0000000007E10000-0x0000000007E21000-memory.dmp

    Filesize

    68KB

  • memory/3176-23-0x0000000005A20000-0x0000000005A42000-memory.dmp

    Filesize

    136KB

  • memory/3176-73-0x0000000007E50000-0x0000000007E64000-memory.dmp

    Filesize

    80KB

  • memory/3176-74-0x0000000007F50000-0x0000000007F6A000-memory.dmp

    Filesize

    104KB

  • memory/3176-75-0x0000000007F30000-0x0000000007F38000-memory.dmp

    Filesize

    32KB

  • memory/3176-78-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/3176-19-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/3176-15-0x0000000002FB0000-0x0000000002FE6000-memory.dmp

    Filesize

    216KB

  • memory/3176-16-0x00000000748E0000-0x0000000075090000-memory.dmp

    Filesize

    7.7MB

  • memory/3480-97-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3480-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3480-96-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4920-102-0x0000000006570000-0x00000000065BC000-memory.dmp

    Filesize

    304KB

  • memory/4920-103-0x0000000075160000-0x00000000751AC000-memory.dmp

    Filesize

    304KB

  • memory/4920-113-0x0000000007770000-0x0000000007813000-memory.dmp

    Filesize

    652KB

  • memory/4920-114-0x0000000007A70000-0x0000000007A81000-memory.dmp

    Filesize

    68KB

  • memory/4920-115-0x0000000007AC0000-0x0000000007AD4000-memory.dmp

    Filesize

    80KB

  • memory/4920-91-0x00000000060A0000-0x00000000063F4000-memory.dmp

    Filesize

    3.3MB