Analysis

  • max time kernel
    104s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/04/2025, 11:02

General

  • Target

    remcos.exe

  • Size

    1.6MB

  • MD5

    d8a9c29e11551ed7cd75a7647b60f390

  • SHA1

    969dbab818aea458ff5c4537c017ce04a5e568d0

  • SHA256

    512a5c196625c71b99037ea18a34b29e620ecd72e81073cc3143396bf43b5d61

  • SHA512

    0023ff145b5fc82792c689510b96a81598754d13d170a3948c5fc7fd485ac5a31dceb3e729674abc51cc8a6f71e986d1158ce3e69b154036debb5d39a7164261

  • SSDEEP

    24576:OkCIwKMTJndSh1pBOzgqDx/u09mxzy8DfrKwUaYJ4PGd77iSI2grsZnbdWy8stfG:OkCzgUHDYuhJ4Ox7iS3grsBbdiw

Malware Config

Signatures

  • ModiLoader, DBatLoader

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

  • Modiloader family
  • ModiLoader Second Stage 61 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 5 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\remcos.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4956
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\\ProgramData\\5932.cmd
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3200
      • C:\Windows\SysWOW64\esentutl.exe
        C:\\Windows\\System32\\esentutl /y C:\\Windows\\System32\\cmd.exe /d C:\\Users\\Public\\alpha.pif /o
        3⤵
          PID:1768
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c mkdir "\\?\C:\Windows "
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:844
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c mkdir "\\?\C:\Windows \SysWOW64"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:3032
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\\ProgramData\\10666.cmd
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4516
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 10
          3⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:4496
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\\ProgramData\\597.cmd
        2⤵
        • System Location Discovery: System Language Discovery
        PID:2488
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        2⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2416
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\chrome\remcos.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3024
          • C:\ProgramData\chrome\remcos.exe
            C:\ProgramData\chrome\remcos.exe
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:3948
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 1112
              5⤵
              • Program crash
              PID:1876
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c "C:\ProgramData\chrome\remcos.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:928
      • C:\ProgramData\chrome\remcos.exe
        C:\ProgramData\chrome\remcos.exe
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4844
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4844 -s 1152
          3⤵
          • Program crash
          PID:4600
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c "C:\ProgramData\chrome\remcos.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\ProgramData\chrome\remcos.exe
        C:\ProgramData\chrome\remcos.exe
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1552
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1552 -s 1176
          3⤵
          • Program crash
          PID:3328
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4844 -ip 4844
      1⤵
        PID:3972
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1552 -ip 1552
        1⤵
          PID:2060
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3948 -ip 3948
          1⤵
            PID:4316

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\10666.cmd

            Filesize

            2KB

            MD5

            9a020804eba1ffac2928d7c795144bbf

            SHA1

            61fdc4135afdc99e106912aeafeac9c8a967becc

            SHA256

            a86c6c7a2bf9e12c45275a5e7ebebd5e6d2ba302fe0a12600b7c9fdf283d9e63

            SHA512

            42f6d754f1bdbeb6e4cc7aeb57ff4c4d126944f950d260a0839911e576ad16002c16122f81c1d39fa529432dca0a48c9acfbb18804ca9044425c8e424a5518be

          • C:\ProgramData\5932.cmd

            Filesize

            19KB

            MD5

            1df650cca01129127d30063634ab5c03

            SHA1

            bc7172dec0b12b05f2247bd5e17751eb33474d4e

            SHA256

            edd4094e7a82a6ff8be65d6b075e9513bd15a6b74f8032b5c10ce18f7191fa60

            SHA512

            0bddf9ecaaedb0c30103a1fbfb644d6d4f7608bd596403307ed89b2390568c3a29e2cf55d10e2eadbfc407ede52eaf9a4f2321ba5f37e358a1039f73c7688fbd

          • C:\ProgramData\chrome\remcos.exe

            Filesize

            1.6MB

            MD5

            d8a9c29e11551ed7cd75a7647b60f390

            SHA1

            969dbab818aea458ff5c4537c017ce04a5e568d0

            SHA256

            512a5c196625c71b99037ea18a34b29e620ecd72e81073cc3143396bf43b5d61

            SHA512

            0023ff145b5fc82792c689510b96a81598754d13d170a3948c5fc7fd485ac5a31dceb3e729674abc51cc8a6f71e986d1158ce3e69b154036debb5d39a7164261

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

            Filesize

            386B

            MD5

            36c0472fa5b6e3249bf55ea66ec0cbbc

            SHA1

            568644a942fe7837a173971fc95ab09e2af33b34

            SHA256

            1c681529ceff5af8e35a75c3b4390dd51eafe48873e7c13bb1524aa304ac0781

            SHA512

            bba4f04a01a89469d978e3a1a32090daf835f3abd27bb3d4127aaa2ad42017d8174a9f2c1f9593ad3097212f5a9e055d3c8b721fb136e797bb0c15eea18fee17

          • C:\Users\Public\alpha.pif

            Filesize

            231KB

            MD5

            d0fce3afa6aa1d58ce9fa336cc2b675b

            SHA1

            4048488de6ba4bfef9edf103755519f1f762668f

            SHA256

            4d89fc34d5f0f9babd022271c585a9477bf41e834e46b991deaa0530fdb25e22

            SHA512

            80e127ef81752cd50f9ea2d662dc4d3bf8db8d29680e75fa5fc406ca22cafa5c4d89ef2eac65b486413d3cdd57a2c12a1cb75f65d1e312a717d262265736d1c2

          • memory/4956-42-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-36-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-2-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-5-0x0000000002470000-0x0000000002471000-memory.dmp

            Filesize

            4KB

          • memory/4956-4-0x0000000000400000-0x00000000005A3000-memory.dmp

            Filesize

            1.6MB

          • memory/4956-6-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-8-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-25-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-56-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-65-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-64-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-63-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-62-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-60-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-59-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-58-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-57-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-55-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-54-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-53-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-52-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-50-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-49-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-48-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-47-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-46-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-45-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-44-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-43-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-0-0x0000000002470000-0x0000000002471000-memory.dmp

            Filesize

            4KB

          • memory/4956-41-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-39-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-1-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-35-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-37-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-34-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-33-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-32-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-31-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-30-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-28-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-61-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-26-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-24-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-51-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-23-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-21-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-18-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-40-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-17-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-38-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-29-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-27-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-10-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-22-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-20-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-9-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-19-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-16-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-15-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-14-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-13-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-7-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-12-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB

          • memory/4956-11-0x0000000002A20000-0x0000000003A20000-memory.dmp

            Filesize

            16.0MB