Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-09-2024 22:24

General

  • Target

    68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.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 2 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
    "C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1404
    • 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:3740
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEDEA.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3124
    • C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
      "C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3356
      • 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:4420
        • 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:2252
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp27C7.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1480
        • 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:3616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    76dda4d274eabfa9bd1327f06f729125

    SHA1

    569446050c373ad435e1a4e0950c2cb67c040ff1

    SHA256

    5f458522a1f44a46fe88426600823ae61f2cc0ef75052f1796470c13a9d46a79

    SHA512

    5f1ba2d6e9f8668f731024a692243f846d3ed3ff4277f1ba754f1ba106edd3171df32366143ff39d26cdeaaafa1f828faa92a19149f683cb59ef20bc49c9a96b

  • 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

    ca4ac8f09b15e04ced69891bc205818b

    SHA1

    7dd3545b37d88ce85fb6ed858ae97065c62243fd

    SHA256

    63837b073477cf098c1ffb56136a5a4f30c8ecef9ca3016d165c7eac91d98306

    SHA512

    804b2da03c86e48e5e3d9b182c7fffe55a4b719245c1354ce1e158caf3fbdddef243d80d412c95cf70acb0f4fb5d645a536bf0bd7ac9af58e8ad6fd08dca21a7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ivx5vrtw.kwv.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    1KB

    MD5

    f144ee6238f7890a5170a059bc27222e

    SHA1

    31a21e04e5b55fb898df07226ce4f2667c7cd876

    SHA256

    ba60a13244c125e9dd2a27207f757d3ce40ca054866c801d0d8cbcd7e532a31f

    SHA512

    2a0fdae6a4e0054e07d95103077bb706c71211d6e534032531f9f0640bfa2d32b303b1e647a5cc20c8e9b0922c92c82e11af099c2ca10aecd715f61506d8f0c9

  • memory/1404-25-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/1404-4-0x0000000004DD0000-0x0000000004DDA000-memory.dmp

    Filesize

    40KB

  • memory/1404-8-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/1404-9-0x0000000006910000-0x00000000069D0000-memory.dmp

    Filesize

    768KB

  • memory/1404-10-0x0000000008FC0000-0x000000000905C000-memory.dmp

    Filesize

    624KB

  • memory/1404-6-0x00000000050B0000-0x00000000050C0000-memory.dmp

    Filesize

    64KB

  • memory/1404-1-0x00000000002F0000-0x00000000003D2000-memory.dmp

    Filesize

    904KB

  • memory/1404-7-0x000000007528E000-0x000000007528F000-memory.dmp

    Filesize

    4KB

  • memory/1404-5-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/1404-0-0x000000007528E000-0x000000007528F000-memory.dmp

    Filesize

    4KB

  • memory/1404-2-0x0000000005420000-0x00000000059C4000-memory.dmp

    Filesize

    5.6MB

  • memory/1404-3-0x0000000004E70000-0x0000000004F02000-memory.dmp

    Filesize

    584KB

  • memory/2252-113-0x0000000007600000-0x0000000007611000-memory.dmp

    Filesize

    68KB

  • memory/2252-114-0x0000000007640000-0x0000000007654000-memory.dmp

    Filesize

    80KB

  • memory/2252-112-0x0000000007350000-0x00000000073F3000-memory.dmp

    Filesize

    652KB

  • memory/2252-101-0x0000000006650000-0x000000000669C000-memory.dmp

    Filesize

    304KB

  • memory/2252-102-0x0000000071A70000-0x0000000071ABC000-memory.dmp

    Filesize

    304KB

  • memory/2252-99-0x0000000005B10000-0x0000000005E64000-memory.dmp

    Filesize

    3.3MB

  • memory/3356-21-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3356-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3356-41-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3356-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3356-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3616-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3616-89-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3616-86-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3740-42-0x00000000061A0000-0x00000000064F4000-memory.dmp

    Filesize

    3.3MB

  • memory/3740-65-0x0000000006E10000-0x0000000006E2E000-memory.dmp

    Filesize

    120KB

  • memory/3740-66-0x0000000007A40000-0x0000000007AE3000-memory.dmp

    Filesize

    652KB

  • memory/3740-67-0x00000000081C0000-0x000000000883A000-memory.dmp

    Filesize

    6.5MB

  • memory/3740-68-0x0000000007B80000-0x0000000007B9A000-memory.dmp

    Filesize

    104KB

  • memory/3740-69-0x0000000007BF0000-0x0000000007BFA000-memory.dmp

    Filesize

    40KB

  • memory/3740-70-0x0000000007E00000-0x0000000007E96000-memory.dmp

    Filesize

    600KB

  • memory/3740-71-0x0000000007D80000-0x0000000007D91000-memory.dmp

    Filesize

    68KB

  • memory/3740-72-0x0000000007DB0000-0x0000000007DBE000-memory.dmp

    Filesize

    56KB

  • memory/3740-73-0x0000000007DC0000-0x0000000007DD4000-memory.dmp

    Filesize

    80KB

  • memory/3740-74-0x0000000007EC0000-0x0000000007EDA000-memory.dmp

    Filesize

    104KB

  • memory/3740-75-0x0000000007EA0000-0x0000000007EA8000-memory.dmp

    Filesize

    32KB

  • memory/3740-78-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/3740-55-0x00000000716E0000-0x000000007172C000-memory.dmp

    Filesize

    304KB

  • memory/3740-54-0x0000000006E30000-0x0000000006E62000-memory.dmp

    Filesize

    200KB

  • memory/3740-53-0x00000000068F0000-0x000000000693C000-memory.dmp

    Filesize

    304KB

  • memory/3740-52-0x0000000006860000-0x000000000687E000-memory.dmp

    Filesize

    120KB

  • memory/3740-28-0x0000000005F00000-0x0000000005F66000-memory.dmp

    Filesize

    408KB

  • memory/3740-29-0x0000000006070000-0x00000000060D6000-memory.dmp

    Filesize

    408KB

  • memory/3740-27-0x0000000005830000-0x0000000005852000-memory.dmp

    Filesize

    136KB

  • memory/3740-20-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/3740-19-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/3740-18-0x00000000058D0000-0x0000000005EF8000-memory.dmp

    Filesize

    6.2MB

  • memory/3740-17-0x0000000075280000-0x0000000075A30000-memory.dmp

    Filesize

    7.7MB

  • memory/3740-15-0x0000000005260000-0x0000000005296000-memory.dmp

    Filesize

    216KB