Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    13-08-2024 16:58

General

  • Target

    Etkt9oJ08ZyhAlm.exe

  • Size

    910KB

  • MD5

    e93b72986bdf1856a3f407cbb948b5dd

  • SHA1

    3e546f719a8c752429382d7c78747bfe96ac6c42

  • SHA256

    51aa6be003977c67c7eaf393b81af1e5ff9ad99850ce86ba7c3dafe7e12728c6

  • SHA512

    7195283fdeec6479e6b0225a9ba3c95c430770173bf1148f1cd10f11a0183fe2082adf67849ceb2841f016bcf9af203268633295da8062ad18444a8b9c69ba9d

  • SSDEEP

    24576:rBuYiVAVhw4b8TrquAD+xCyUpoPNOUEqgkQt+wUcVWVD:rBuYIgnbWrCD+xCyhVSdVi

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.243.155:7643

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-C9YEJ8

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 5 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 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Etkt9oJ08ZyhAlm.exe
    "C:\Users\Admin\AppData\Local\Temp\Etkt9oJ08ZyhAlm.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Etkt9oJ08ZyhAlm.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2068
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\kFkVqvIpoatJkA.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2880
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kFkVqvIpoatJkA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp19C8.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2796
    • C:\Users\Admin\AppData\Local\Temp\Etkt9oJ08ZyhAlm.exe
      "C:\Users\Admin\AppData\Local\Temp\Etkt9oJ08ZyhAlm.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    ec7d6baf13657897e17554d5bf73cdd5

    SHA1

    0e2498172eecdde61ec79c43e96d9a215973e598

    SHA256

    594bf21f353e04e7c2275f1f0784ecba8486cbf8446184a04dfd276ef7b04301

    SHA512

    60e7b5fab26b81abf0780d0bf219031830f480aa6d4338cf462c8623d3cca74798e8d7b580f2e584e6e3ce26b3f9e1f5accd3dd4502a74aa1f89663e4fb9b5c9

  • C:\Users\Admin\AppData\Local\Temp\tmp19C8.tmp

    Filesize

    1KB

    MD5

    f2ca1a153462a0b973d7c326bfdc8c85

    SHA1

    5533cee0ebdcf401bb0559ac093906a8f50e85e3

    SHA256

    76272f3d0ef21313c44ea034d213cbb437334723cf018b5ebab7effb218d50b1

    SHA512

    59ca2b59c1d7f98f9aae03ca7518fdd91b8f4cc291e4659b713fd8184940ee6549295d57dcd9fe7477b73a1250ca045b221fd3c486dc9539e580a09f2cd0414d

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

    Filesize

    7KB

    MD5

    499a27bd5055a40ed8fbb11fd5f4c175

    SHA1

    6415caf276fcc63d2e35b5dcdd133f0b47d11039

    SHA256

    3bc32b41b98676dd9825659e2b41e1ec80f4e7ba458de0b8716cb9db467d84a8

    SHA512

    311cd0e4b1e358133ee8e7311aa159937d7ea6337f5ecd18182d81f45d9bc0140de9dfd92ad6c2c294cb93be70fc0e6d53590d7b860483492080710dd2318fc8

  • memory/2208-0-0x000000007443E000-0x000000007443F000-memory.dmp

    Filesize

    4KB

  • memory/2208-1-0x00000000002D0000-0x00000000003BA000-memory.dmp

    Filesize

    936KB

  • memory/2208-2-0x0000000074430000-0x0000000074B1E000-memory.dmp

    Filesize

    6.9MB

  • memory/2208-3-0x0000000000440000-0x000000000045E000-memory.dmp

    Filesize

    120KB

  • memory/2208-4-0x0000000000470000-0x0000000000486000-memory.dmp

    Filesize

    88KB

  • memory/2208-5-0x0000000005870000-0x0000000005930000-memory.dmp

    Filesize

    768KB

  • memory/2208-42-0x0000000074430000-0x0000000074B1E000-memory.dmp

    Filesize

    6.9MB

  • memory/2816-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-43-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-37-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-36-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2816-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-41-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-40-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-44-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-47-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-50-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-57-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-65-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-66-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-81-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2816-82-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB