Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    23-10-2020 10:24

General

  • Target

    Vidoe001mp4.scr signed FAT11 d.o.o.exe

  • Size

    1.2MB

  • MD5

    0d0c318096299a617f70ea57559c4f55

  • SHA1

    8199b12cc24d416cb8835b5e3d00b92339ad9b45

  • SHA256

    73feac20d7cdbe1e10ca26b196d60d68ea0c4e652ceacf534b1c549e4e597e74

  • SHA512

    b6cfc8df9556683cf4cbef46aa208081853d4132cee94fbcd0a6d9ee2ded5d6dd5987578093eae98c595776b51104613c5bc2e6e42bb543c2c59c2eafa012751

Malware Config

Extracted

Family

remcos

C2

108.174.197.5:5050

Signatures

  • Remcos

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

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 1 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6892 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 175 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Vidoe001mp4.scr signed FAT11 d.o.o.exe
    "C:\Users\Admin\AppData\Local\Temp\Vidoe001mp4.scr signed FAT11 d.o.o.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3920
    • C:\Windows\SysWOW64\ipconfig.exe
      "C:\Windows\system32\ipconfig.exe"
      2⤵
      • Gathers network information
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1148
      • C:\Users\Admin\AppData\Local\Temp\cmd.exe
        "C:\Users\Admin\AppData\Local\Temp\cmd.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Windows directory
        • Modifies Internet Explorer settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:2756
        • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
          "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
          4⤵
          • Executes dropped EXE
          PID:4032
        • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\2053331618.exe
          "2053331618.exe"
          4⤵
          • Executes dropped EXE
          PID:3792
        • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe
          "C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Modifies registry class
          PID:1188
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
            5⤵
              PID:2152
              • C:\Users\Admin\AppData\Local\Temp\cmd.exe
                "C:\Users\Admin\AppData\Local\Temp\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
                6⤵
                • Executes dropped EXE
                PID:784
                • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  7⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of SetWindowsHookEx
                  PID:2864

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      MD5

      b4cd27f2b37665f51eb9fe685ec1d373

      SHA1

      7f08febf0fdb7fc9f8bf35a10fb11e7de431abe0

      SHA256

      91f1023142b7babf6ff75dad984c2a35bde61dc9e61f45483f4b65008576d581

      SHA512

      e025f65224d78f5fd0abebe281ac0d44a385b2641e367cf39eed6aefada20a112ac47f94d7febc4424f1db6a6947bac16ff83ef93a8d745b3cddfdbe64c49a1e

    • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
      MD5

      b4cd27f2b37665f51eb9fe685ec1d373

      SHA1

      7f08febf0fdb7fc9f8bf35a10fb11e7de431abe0

      SHA256

      91f1023142b7babf6ff75dad984c2a35bde61dc9e61f45483f4b65008576d581

      SHA512

      e025f65224d78f5fd0abebe281ac0d44a385b2641e367cf39eed6aefada20a112ac47f94d7febc4424f1db6a6947bac16ff83ef93a8d745b3cddfdbe64c49a1e

    • C:\Users\Admin\AppData\Local\Temp\cmd.exe
      MD5

      50b930137463b14f73186c7c6767a2aa

      SHA1

      574f512a44097275658f9c304ef0b74029e9ea46

      SHA256

      eb51a0c96f7de6ce8bb0386429fff83bf95cb23fa61efe499b416f1cb0fc71c9

      SHA512

      7f09ca777189d95d7ca0665a29c800a5228a93437b1067d7276e05d6da07bc6adc9644f545dc35ea0267dd8e7e312b414c9a613001e4f1d600bb481d4cbff872

    • C:\Users\Admin\AppData\Local\Temp\cmd.exe
      MD5

      50b930137463b14f73186c7c6767a2aa

      SHA1

      574f512a44097275658f9c304ef0b74029e9ea46

      SHA256

      eb51a0c96f7de6ce8bb0386429fff83bf95cb23fa61efe499b416f1cb0fc71c9

      SHA512

      7f09ca777189d95d7ca0665a29c800a5228a93437b1067d7276e05d6da07bc6adc9644f545dc35ea0267dd8e7e312b414c9a613001e4f1d600bb481d4cbff872

    • C:\Users\Admin\AppData\Local\Temp\cmd.exe
      MD5

      50b930137463b14f73186c7c6767a2aa

      SHA1

      574f512a44097275658f9c304ef0b74029e9ea46

      SHA256

      eb51a0c96f7de6ce8bb0386429fff83bf95cb23fa61efe499b416f1cb0fc71c9

      SHA512

      7f09ca777189d95d7ca0665a29c800a5228a93437b1067d7276e05d6da07bc6adc9644f545dc35ea0267dd8e7e312b414c9a613001e4f1d600bb481d4cbff872

    • C:\Users\Admin\AppData\Local\Temp\install.vbs
      MD5

      b92d64fe5b1d1f59df4b738262aea8df

      SHA1

      c8fb1981759c2d9bb2ec91b705985fba5fc7af63

      SHA256

      fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

      SHA512

      2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

    • C:\Users\Admin\AppData\Local\Temp\x64btit.txt
      MD5

      039e8e14af27d9aeb4fec5da10f845cf

      SHA1

      da49507a82b0fcae40a18cf9fb6a51b480b79a42

      SHA256

      931bc5e71b050de0a5ce92d1b054c1ba1b66abebeb1df1c780adf91e1a59d232

      SHA512

      4e173054f936dd336cd912b816af6d9a953b498f36329d161af0874e242631af4318d2bcaf4c88577481c766902862088465bf74318a4de8dc6fc5229e87cfc6

    • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\2053331618.exe
      MD5

      9f385a9a69a4d9e18055743f0694976b

      SHA1

      2c2385ea964a33f803e96e364d4a05771c733921

      SHA256

      45f175bc165a3f8d9a05da48bdc4c1f234386588e0d003df094f72d019ae6216

      SHA512

      e9e78eb02bad22815648723138a7443da527779644ad9f9e776f91ba796b255c7556c5fe82ea526825c23ea376ed90d4dd5f31b026d2ff00605d8db9b0729c3c

    • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\2053331618.exe
      MD5

      9f385a9a69a4d9e18055743f0694976b

      SHA1

      2c2385ea964a33f803e96e364d4a05771c733921

      SHA256

      45f175bc165a3f8d9a05da48bdc4c1f234386588e0d003df094f72d019ae6216

      SHA512

      e9e78eb02bad22815648723138a7443da527779644ad9f9e776f91ba796b255c7556c5fe82ea526825c23ea376ed90d4dd5f31b026d2ff00605d8db9b0729c3c

    • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe
      MD5

      454fd4d559cd0f7f9939fad9044489f6

      SHA1

      9495fcfd817ca8871d8a0bef318ded1e0398ad81

      SHA256

      3e8b9218058a61526cb70c888b84984819d593b00fb89d56947ce81657dc62a7

      SHA512

      7a37f3749744f978c7c3d385f9349a1593ce6db839085f6f5110cafa0406ea0170bb321eb625b73828a0285d38cab732fe9c4466169ea9939094ad0570af1d23

    • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe
      MD5

      454fd4d559cd0f7f9939fad9044489f6

      SHA1

      9495fcfd817ca8871d8a0bef318ded1e0398ad81

      SHA256

      3e8b9218058a61526cb70c888b84984819d593b00fb89d56947ce81657dc62a7

      SHA512

      7a37f3749744f978c7c3d385f9349a1593ce6db839085f6f5110cafa0406ea0170bb321eb625b73828a0285d38cab732fe9c4466169ea9939094ad0570af1d23

    • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
      MD5

      454fd4d559cd0f7f9939fad9044489f6

      SHA1

      9495fcfd817ca8871d8a0bef318ded1e0398ad81

      SHA256

      3e8b9218058a61526cb70c888b84984819d593b00fb89d56947ce81657dc62a7

      SHA512

      7a37f3749744f978c7c3d385f9349a1593ce6db839085f6f5110cafa0406ea0170bb321eb625b73828a0285d38cab732fe9c4466169ea9939094ad0570af1d23

    • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
      MD5

      454fd4d559cd0f7f9939fad9044489f6

      SHA1

      9495fcfd817ca8871d8a0bef318ded1e0398ad81

      SHA256

      3e8b9218058a61526cb70c888b84984819d593b00fb89d56947ce81657dc62a7

      SHA512

      7a37f3749744f978c7c3d385f9349a1593ce6db839085f6f5110cafa0406ea0170bb321eb625b73828a0285d38cab732fe9c4466169ea9939094ad0570af1d23

    • \Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\264992817.dll
      MD5

      62cdc3a40d41de66201353fca4a24feb

      SHA1

      46ac41a725f669b0ca0a8fed7f3ccb6c190594f1

      SHA256

      6eb970a56420a3a3b101661ec5cdda5952cef5887f45a837d4a10db51930935c

      SHA512

      c046c9035ea542fed3789bc6c92712d4d59f32b7527df9cd53297cb8aab9bfc22a0666b590bbeb955fa2a3858d0d43588b76433796cc4d121bb07298c95dbd6f

    • memory/784-20-0x0000000000000000-mapping.dmp
    • memory/1148-0-0x0000000000000000-mapping.dmp
    • memory/1148-2-0x0000000006710000-0x00000000067AF000-memory.dmp
      Filesize

      636KB

    • memory/1148-1-0x00000000060B0000-0x0000000006132000-memory.dmp
      Filesize

      520KB

    • memory/1188-14-0x0000000000000000-mapping.dmp
    • memory/2152-17-0x0000000000000000-mapping.dmp
    • memory/2756-3-0x0000000000000000-mapping.dmp
    • memory/2756-5-0x0000000000400000-0x000000000049F000-memory.dmp
      Filesize

      636KB

    • memory/2864-22-0x0000000000000000-mapping.dmp
    • memory/3792-11-0x0000000000000000-mapping.dmp
    • memory/4032-6-0x0000000000000000-mapping.dmp