Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    21-01-2021 10:15

General

  • Target

    SecuriteInfo.com.Generic.mg.3d63c204511f1851.31197.exe

  • Size

    1.3MB

  • MD5

    3d63c204511f18510049d2fba3047d8d

  • SHA1

    64aac8da141a21ddb1a66616764f9e15eb6d565f

  • SHA256

    33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

  • SHA512

    67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

Malware Config

Extracted

Family

remcos

C2

wedsazxcvfghyuiokjhbnvfcdsaweyplmhbvrtud.ydns.eu:1996

Signatures

  • Remcos

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 14 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Program crash 1 IoCs
  • Delays execution with timeout.exe 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 90 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Generic.mg.3d63c204511f1851.31197.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Generic.mg.3d63c204511f1851.31197.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1204
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2032
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:2044
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1252
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:2000
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1192
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:916
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Generic.mg.3d63c204511f1851.31197.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Generic.mg.3d63c204511f1851.31197.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:428
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1356
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\win.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:576
          • C:\Users\Admin\AppData\Roaming\win.exe
            C:\Users\Admin\AppData\Roaming\win.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:616
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1488
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:1592
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1108
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:2028
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
                PID:1540
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 1
                  7⤵
                  • Delays execution with timeout.exe
                  PID:1576
              • C:\Users\Admin\AppData\Roaming\win.exe
                "C:\Users\Admin\AppData\Roaming\win.exe"
                6⤵
                • Executes dropped EXE
                PID:508
              • C:\Users\Admin\AppData\Roaming\win.exe
                "C:\Users\Admin\AppData\Roaming\win.exe"
                6⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of SetWindowsHookEx
                PID:792
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1204 -s 948
        2⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:560

    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
      MD5

      4a74e626596d6e66b4bbc59ee6848f2d

      SHA1

      047849ac8735ecc0943428c7cd5e00b52eee06ed

      SHA256

      98bd6dc219a7a3e04d3d67bbec9f0b4d4640831a3a6be0a0078b050041088b0e

      SHA512

      1cd943482d0f1ce2ffaf6ee4a82895e4d57c52051bb14bbda0548cf072b4c5cbe719d2cdb549b5ae7c0241dd9c68dd9d1674acd26aed684b8145500079cc5403

    • C:\Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • C:\Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • C:\Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • C:\Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • \Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • \Users\Admin\AppData\Roaming\win.exe
      MD5

      3d63c204511f18510049d2fba3047d8d

      SHA1

      64aac8da141a21ddb1a66616764f9e15eb6d565f

      SHA256

      33cca7e1dc5f3871bdbaa2bd663671a8add0f46a6c56f5ff0b039e3cc0f41af5

      SHA512

      67209b1dbd84ead09ed19003dcb1d6be0665214c23eda836d3607a520b2f1b9efbaeb79bb7ad4ef5c34efeef23fedde670bf51ff4552ef077e20257d28145eaa

    • memory/428-21-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/428-14-0x0000000000413FA4-mapping.dmp
    • memory/428-13-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/428-15-0x00000000765E1000-0x00000000765E3000-memory.dmp
      Filesize

      8KB

    • memory/560-22-0x00000000002A0000-0x00000000002A1000-memory.dmp
      Filesize

      4KB

    • memory/560-16-0x0000000000000000-mapping.dmp
    • memory/560-18-0x0000000002070000-0x0000000002081000-memory.dmp
      Filesize

      68KB

    • memory/576-23-0x0000000000000000-mapping.dmp
    • memory/616-31-0x0000000000EB0000-0x0000000000EB1000-memory.dmp
      Filesize

      4KB

    • memory/616-28-0x0000000000000000-mapping.dmp
    • memory/616-36-0x0000000004DE0000-0x0000000004DE1000-memory.dmp
      Filesize

      4KB

    • memory/616-30-0x0000000074090000-0x000000007477E000-memory.dmp
      Filesize

      6.9MB

    • memory/792-46-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/792-43-0x0000000000413FA4-mapping.dmp
    • memory/916-12-0x0000000000000000-mapping.dmp
    • memory/1108-37-0x0000000000000000-mapping.dmp
    • memory/1192-11-0x0000000000000000-mapping.dmp
    • memory/1204-5-0x00000000001E0000-0x0000000000210000-memory.dmp
      Filesize

      192KB

    • memory/1204-2-0x0000000074090000-0x000000007477E000-memory.dmp
      Filesize

      6.9MB

    • memory/1204-3-0x0000000000860000-0x0000000000861000-memory.dmp
      Filesize

      4KB

    • memory/1204-6-0x0000000004D50000-0x0000000004D51000-memory.dmp
      Filesize

      4KB

    • memory/1252-9-0x0000000000000000-mapping.dmp
    • memory/1356-17-0x0000000000000000-mapping.dmp
    • memory/1356-24-0x00000000028A0000-0x00000000028A4000-memory.dmp
      Filesize

      16KB

    • memory/1488-34-0x0000000000000000-mapping.dmp
    • memory/1540-39-0x0000000000000000-mapping.dmp
    • memory/1576-40-0x0000000000000000-mapping.dmp
    • memory/1592-35-0x0000000000000000-mapping.dmp
    • memory/2000-10-0x0000000000000000-mapping.dmp
    • memory/2028-38-0x0000000000000000-mapping.dmp
    • memory/2032-7-0x0000000000000000-mapping.dmp
    • memory/2044-8-0x0000000000000000-mapping.dmp