Analysis

  • max time kernel
    113s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01-02-2023 08:22

General

  • Target

    Esuebxmhhntgos.exe

  • Size

    933KB

  • MD5

    04b9d6cc9e5af42ee32bc22863e01f7c

  • SHA1

    a65cd824d92c56ecfc95ba6c652846b716c73b72

  • SHA256

    1ba24f631c03782730c9bb139d724474cb415c545890cb52a61bf25892829655

  • SHA512

    dda49a38557bd030c14c44c9cc9cf9d4e46cf3d46927cbdb70349d3b9a5fb17a8ea13651d73728f853277929a22acfa87ddad28c2528b27b0a8f03241e0696de

  • SSDEEP

    12288:BENV/fB+g9GgglTA/CsFA4Mv5Eko1M+c/ibBdxQ7zPZ+mLJtzRq:Bo79CGPmtqc/i7IBnzRq

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

213.152.162.181:5129

184.75.221.171:5129

199.249.230.27:5129

185.103.96.143:5129

185.104.184.43:5129

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • 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). Likely ransomware behaviour.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Esuebxmhhntgos.exe
    "C:\Users\Admin\AppData\Local\Temp\Esuebxmhhntgos.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1404
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Public\Libraries\EsuebxmhO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:308
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
        3⤵
          PID:800
        • C:\Windows\SysWOW64\xcopy.exe
          xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
          3⤵
          • Enumerates system info in registry
          PID:752
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:688
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:1356
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:520
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:1612
            • C:\Windows \System32\easinvoker.exe
              "C:\Windows \System32\easinvoker.exe"
              3⤵
              • Executes dropped EXE
              PID:464
            • C:\Windows \System32\easinvoker.exe
              "C:\Windows \System32\easinvoker.exe"
              3⤵
              • Executes dropped EXE
              PID:2016
            • C:\Windows\SysWOW64\PING.EXE
              ping 127.0.0.1 -n 6
              3⤵
              • Runs ping.exe
              PID:1636
          • C:\Windows\SysWOW64\iexpress.exe
            C:\Windows\System32\iexpress.exe
            2⤵
              PID:112
          • C:\Windows\SysWOW64\DllHost.exe
            C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
            1⤵
            • Suspicious use of FindShellTrayWindow
            PID:2032

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Public\Libraries\EsuebxmhO.bat

            Filesize

            411B

            MD5

            55aba243e88f6a6813c117ffe1fa5979

            SHA1

            210b9b028a4b798c837a182321dbf2e50d112816

            SHA256

            5a11c5641c476891aa30e7ecfa57c2639f6827d8640061f73e9afec0adbbd7d2

            SHA512

            68009c4c9bbea75a3bfa9f79945d30957a95691ea405d031b4ca7f1cb47504bbc768fcae59173885743ad4d6cfdd2313c3fe0acb515e34e5c809ecdc7f45e307

          • C:\Users\Public\Libraries\KDECO.bat

            Filesize

            155B

            MD5

            213c60adf1c9ef88dc3c9b2d579959d2

            SHA1

            e4d2ad7b22b1a8b5b1f7a702b303c7364b0ee021

            SHA256

            37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e

            SHA512

            fe897d9caa306b0e761b2fd61bb5dc32a53bfaad1ce767c6860af4e3ad59c8f3257228a6e1072dab0f990cb51c59c648084ba419ac6bc5c0a99bdffa569217b7

          • C:\Users\Public\Libraries\easinvoker.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Users\Public\Libraries\netutils.dll

            Filesize

            110KB

            MD5

            b375e74a145c45d07190212e9157e5f8

            SHA1

            59d3de7748e1090ce95523601224ce5ab6cc4a3a

            SHA256

            6ec341496722bfdde504d430a7ece494701a9369b1fa5376ec488a77ab3c1744

            SHA512

            859737afb6108f131c0ac35560878359505c4f7fdd01ce468c04b15848df71f70987552a831a43ce948a37c9b1d6a434ff7f6fb5946f3730049b924d5b462ef0

          • C:\Users\Public\tnhhmxbeusE.png

            Filesize

            1KB

            MD5

            d9ae953da96f6c7261f47b6fdc6d2b7e

            SHA1

            561eb2a21d9898ca6ddf3fbf5eac0b493e32abe8

            SHA256

            137b50eb77d46c7b1b3a60adaf69980d03cb57771fe2628135da5b5deb6f3de7

            SHA512

            2b99fa91ffb39e30df0e6284c2ba9e9015dfd9b1ecdcddb31e0d988dce3d7b35167f651c4c832970eb2dc139bce810da259b9d8f3c0a46a8f714167b4a0fb254

          • C:\Windows \System32\KDECO.bat

            Filesize

            155B

            MD5

            213c60adf1c9ef88dc3c9b2d579959d2

            SHA1

            e4d2ad7b22b1a8b5b1f7a702b303c7364b0ee021

            SHA256

            37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e

            SHA512

            fe897d9caa306b0e761b2fd61bb5dc32a53bfaad1ce767c6860af4e3ad59c8f3257228a6e1072dab0f990cb51c59c648084ba419ac6bc5c0a99bdffa569217b7

          • C:\Windows \System32\easinvoker.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Windows \System32\easinvoker.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Windows \System32\easinvoker.exe

            Filesize

            128KB

            MD5

            231ce1e1d7d98b44371ffff407d68b59

            SHA1

            25510d0f6353dbf0c9f72fc880de7585e34b28ff

            SHA256

            30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

            SHA512

            520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

          • C:\Windows \System32\netutils.dll

            Filesize

            110KB

            MD5

            b375e74a145c45d07190212e9157e5f8

            SHA1

            59d3de7748e1090ce95523601224ce5ab6cc4a3a

            SHA256

            6ec341496722bfdde504d430a7ece494701a9369b1fa5376ec488a77ab3c1744

            SHA512

            859737afb6108f131c0ac35560878359505c4f7fdd01ce468c04b15848df71f70987552a831a43ce948a37c9b1d6a434ff7f6fb5946f3730049b924d5b462ef0

          • memory/112-81-0x0000000010530000-0x000000001054A000-memory.dmp

            Filesize

            104KB

          • memory/112-77-0x0000000000000000-mapping.dmp

          • memory/112-84-0x00000000007F0000-0x0000000000807000-memory.dmp

            Filesize

            92KB

          • memory/112-83-0x0000000010530000-0x000000001054A000-memory.dmp

            Filesize

            104KB

          • memory/308-58-0x0000000000000000-mapping.dmp

          • memory/520-66-0x0000000000000000-mapping.dmp

          • memory/688-63-0x0000000000000000-mapping.dmp

          • memory/752-61-0x0000000000000000-mapping.dmp

          • memory/800-60-0x0000000000000000-mapping.dmp

          • memory/1356-64-0x0000000000000000-mapping.dmp

          • memory/1404-54-0x0000000074F01000-0x0000000074F03000-memory.dmp

            Filesize

            8KB

          • memory/1404-79-0x0000000010530000-0x000000001054A000-memory.dmp

            Filesize

            104KB

          • memory/1404-80-0x0000000010530000-0x000000001054A000-memory.dmp

            Filesize

            104KB

          • memory/1404-55-0x00000000003A0000-0x00000000003CC000-memory.dmp

            Filesize

            176KB

          • memory/1612-67-0x0000000000000000-mapping.dmp

          • memory/1636-74-0x0000000000000000-mapping.dmp