Analysis

  • max time kernel
    152s
  • max time network
    137s
  • platform
    windows10-1703_x64
  • resource
    win10-20220901-en
  • resource tags

    arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
  • submitted
    22-10-2022 04:43

General

  • Target

    be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968.exe

  • Size

    1.1MB

  • MD5

    b4b5917ae4c8231d912bd02bfccfe11a

  • SHA1

    c8d19594e9800f9a5a0c8126ce2514d6f8f9d45b

  • SHA256

    be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968

  • SHA512

    c6928b42412d84d686e47dcd7915f2f165dd81284cdd1b0b55d309b8552d6e1a867fb1838fbd44c47881fca7b9b371e723dcbffb39c14f02e3748968a1d8ae8f

  • SSDEEP

    24576:sQkTuE0RAaMZqeaZWFJQEgwSdqZC62+cN2qd9H+fPpLnSlF:sBEeXqeaZWFJQtdqEF9HsnkF

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    oos.exe

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Remcos-MMP2I7

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    kkl

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968.exe
    "C:\Users\Admin\AppData\Local\Temp\be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4792
    • C:\Users\Admin\AppData\Local\Temp\be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968.exe
      "C:\Users\Admin\AppData\Local\Temp\be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968.exe"
      2⤵
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:5080
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3864
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4528
          • C:\Users\Admin\AppData\Roaming\oos.exe
            C:\Users\Admin\AppData\Roaming\oos.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4392
            • C:\Users\Admin\AppData\Roaming\oos.exe
              "C:\Users\Admin\AppData\Roaming\oos.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of SetWindowsHookEx
              PID:188

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.vbs
    Filesize

    398B

    MD5

    a5d3440f90cbfae712166e20870eaed7

    SHA1

    cc1e1a2945eb2ad475234344f7527ad9e9873647

    SHA256

    960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

    SHA512

    d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

  • C:\Users\Admin\AppData\Roaming\oos.exe
    Filesize

    1.1MB

    MD5

    b4b5917ae4c8231d912bd02bfccfe11a

    SHA1

    c8d19594e9800f9a5a0c8126ce2514d6f8f9d45b

    SHA256

    be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968

    SHA512

    c6928b42412d84d686e47dcd7915f2f165dd81284cdd1b0b55d309b8552d6e1a867fb1838fbd44c47881fca7b9b371e723dcbffb39c14f02e3748968a1d8ae8f

  • C:\Users\Admin\AppData\Roaming\oos.exe
    Filesize

    1.1MB

    MD5

    b4b5917ae4c8231d912bd02bfccfe11a

    SHA1

    c8d19594e9800f9a5a0c8126ce2514d6f8f9d45b

    SHA256

    be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968

    SHA512

    c6928b42412d84d686e47dcd7915f2f165dd81284cdd1b0b55d309b8552d6e1a867fb1838fbd44c47881fca7b9b371e723dcbffb39c14f02e3748968a1d8ae8f

  • C:\Users\Admin\AppData\Roaming\oos.exe
    Filesize

    1.1MB

    MD5

    b4b5917ae4c8231d912bd02bfccfe11a

    SHA1

    c8d19594e9800f9a5a0c8126ce2514d6f8f9d45b

    SHA256

    be9fe1cd741c239b0ce1b3edc3fb8f87445acf71ab2fb5346197e50c2da66968

    SHA512

    c6928b42412d84d686e47dcd7915f2f165dd81284cdd1b0b55d309b8552d6e1a867fb1838fbd44c47881fca7b9b371e723dcbffb39c14f02e3748968a1d8ae8f

  • memory/188-447-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/188-440-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/188-389-0x000000000043168C-mapping.dmp
  • memory/3864-243-0x0000000000000000-mapping.dmp
  • memory/4392-324-0x0000000000000000-mapping.dmp
  • memory/4528-311-0x0000000000000000-mapping.dmp
  • memory/4792-157-0x0000000005890000-0x0000000005D8E000-memory.dmp
    Filesize

    5.0MB

  • memory/4792-162-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-127-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-128-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-129-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-130-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-131-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-132-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-133-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-134-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-135-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-136-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-137-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-138-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-139-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-140-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-141-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-142-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-143-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-144-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-145-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-146-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-147-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-148-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-149-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-150-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-151-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-152-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-153-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-154-0x0000000000B10000-0x0000000000C24000-memory.dmp
    Filesize

    1.1MB

  • memory/4792-155-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-156-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-125-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-158-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-159-0x0000000005470000-0x0000000005502000-memory.dmp
    Filesize

    584KB

  • memory/4792-160-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-161-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-126-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-163-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-164-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-165-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-166-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-168-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-167-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-169-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-170-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-171-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-172-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-173-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-174-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-175-0x0000000005450000-0x000000000545A000-memory.dmp
    Filesize

    40KB

  • memory/4792-176-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-177-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-178-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-179-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-180-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-181-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-182-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-183-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-184-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-185-0x00000000079A0000-0x00000000079B6000-memory.dmp
    Filesize

    88KB

  • memory/4792-186-0x0000000008B20000-0x0000000008BBC000-memory.dmp
    Filesize

    624KB

  • memory/4792-187-0x0000000008C90000-0x0000000008D60000-memory.dmp
    Filesize

    832KB

  • memory/4792-188-0x0000000008DE0000-0x0000000008E46000-memory.dmp
    Filesize

    408KB

  • memory/4792-189-0x0000000008E50000-0x0000000008ECA000-memory.dmp
    Filesize

    488KB

  • memory/4792-120-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-121-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-124-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-123-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/4792-122-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/5080-191-0x000000000043168C-mapping.dmp
  • memory/5080-190-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/5080-192-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/5080-193-0x0000000076F80000-0x000000007710E000-memory.dmp
    Filesize

    1.6MB

  • memory/5080-239-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/5080-250-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB