Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    19-03-2024 15:05

General

  • Target

    ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe

  • Size

    1.3MB

  • MD5

    44aaef046aa99bfb6520d7b0b1fb758b

  • SHA1

    d9649c6a5eb45805ad1d21cca7bd3f05830c5235

  • SHA256

    ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350

  • SHA512

    919fb01b986172932e5d3f042450489535f9def2273a4f95c701306d44bbe2f6aea36a064366b3b5043b85f5b4b1b562c89e594bb3ba631081df889553f2c740

  • SSDEEP

    24576:EJWUid5kZHYX+fEHxniHBvag2ZCMVAgfM:EJ05aYt4dcsMVAgfM

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:47212

officerem.duckdns.org:47212

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-I8N3XG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • ModiLoader Second Stage 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of FindShellTrayWindow 30 IoCs
  • Suspicious use of SendNotifyMessage 30 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe
    "C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:2196
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:2464
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\8908085.exe"
          2⤵
            PID:3012
            • C:\Windows \System32\8908085.exe
              "C:\Windows \System32\8908085.exe"
              3⤵
              • Executes dropped EXE
              PID:328
            • C:\Windows \System32\8908085.exe
              "C:\Windows \System32\8908085.exe"
              3⤵
              • Executes dropped EXE
              PID:1296
          • C:\Windows\SysWOW64\extrac32.exe
            C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\ae13dba25a62c3ecaf7bf4629ed726dcbb8528f6b6c6a4c7c37efefc17d93350.exe C:\\Users\\Public\\Libraries\\Wcbdytqr.PIF
            2⤵
              PID:1736
            • C:\Windows\SysWOW64\SndVol.exe
              C:\Windows\System32\SndVol.exe
              2⤵
              • Suspicious use of SetWindowsHookEx
              PID:1644

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\remcos\logs.dat

            Filesize

            144B

            MD5

            b621a740f8341e67a046e52553e256b6

            SHA1

            ea2c80fd7b938509ce6d5713af39253d86f9c053

            SHA256

            8ece0481e839e7afe91b6d3230d93b935da0eb99350efa2105730105236592cd

            SHA512

            063a94f9bed12f39ff1217297a41d45520659cc9ef18694f78252d33b14bf652b8b4a1acf0b1b3ef6dc19ffc55b8ea38d61d3d421d71f0d29224e36b00f397f4

          • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

            Filesize

            67KB

            MD5

            753df6889fd7410a2e9fe333da83a429

            SHA1

            3c425f16e8267186061dd48ac1c77c122962456e

            SHA256

            b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78

            SHA512

            9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

          • C:\Users\Admin\AppData\Local\Temp\TarA58A.tmp

            Filesize

            175KB

            MD5

            dd73cead4b93366cf3465c8cd32e2796

            SHA1

            74546226dfe9ceb8184651e920d1dbfb432b314e

            SHA256

            a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

            SHA512

            ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

          • C:\Windows \System32\8908085.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Windows \System32\8908085.exe

            Filesize

            68KB

            MD5

            ed3540f212402b026170cadf5dce2da1

            SHA1

            5a66e9d91c626e4d22c1349352b7ef12bf464afe

            SHA256

            3f45a021b129cd4c3ec6fad0cb06275e0c6f6614e5a6023d3f7d2d3cbd5bbd10

            SHA512

            3acb6686b9c43b24dd1a9f3f12e065000b9150a7266beba7d0b17e10baf87981089fa9a993310320e8f046c6e8e0d72b6c1a7f8031923d07144502d78a963518

          • memory/1644-87-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-89-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-116-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-115-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-83-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-85-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-86-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-107-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-88-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-100-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-91-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-92-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-93-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-97-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/1644-99-0x0000000000410000-0x0000000001410000-memory.dmp

            Filesize

            16.0MB

          • memory/2380-4-0x0000000000400000-0x0000000000551000-memory.dmp

            Filesize

            1.3MB

          • memory/2380-1-0x00000000030A0000-0x00000000040A0000-memory.dmp

            Filesize

            16.0MB

          • memory/2380-0-0x0000000000240000-0x0000000000241000-memory.dmp

            Filesize

            4KB

          • memory/2380-2-0x00000000030A0000-0x00000000040A0000-memory.dmp

            Filesize

            16.0MB

          • memory/3012-67-0x0000000002250000-0x0000000002251000-memory.dmp

            Filesize

            4KB