Analysis

  • max time kernel
    151s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    13-01-2021 06:20

General

  • Target

    2021 NEW PURCHASE REQUIREMENT.xlsx

  • Size

    1.4MB

  • MD5

    c12a39b32626cd2b4ca80d41ffa7a24c

  • SHA1

    2105a2bc2161e9adfa0d3e087e43a466b9f5df58

  • SHA256

    baac57b1f64f5d6e9eeadc84424db056fe253119f0f1bf4b2f2b55f940bce4ab

  • SHA512

    f9a0ed261feea72e6bc128475db4ae5f239ade26937f1b5a645ad5c8d7face344c8ba3a90fbed5679bcd19207e66a52e2cebd5ed210b82d6590eb10a7486ea22

Score
10/10

Malware Config

Extracted

Family

remcos

C2

swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu:2017

Signatures

  • Remcos

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

  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 6 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 14 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Delays execution with timeout.exe 6 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 86 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\2021 NEW PURCHASE REQUIREMENT.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1424
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:1976
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1636
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout 1
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1952
        • C:\Windows\SysWOW64\timeout.exe
          timeout 1
          4⤵
          • Delays execution with timeout.exe
          PID:708
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout 1
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:672
        • C:\Windows\SysWOW64\timeout.exe
          timeout 1
          4⤵
          • Delays execution with timeout.exe
          PID:1240
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout 1
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1624
        • C:\Windows\SysWOW64\timeout.exe
          timeout 1
          4⤵
          • Delays execution with timeout.exe
          PID:1700
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:1292
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1720
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc.exe"
            5⤵
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:1168
            • C:\Users\Admin\AppData\Roaming\vlc.exe
              C:\Users\Admin\AppData\Roaming\vlc.exe
              6⤵
              • Executes dropped EXE
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1124
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout 1
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1196
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 1
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1036
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout 1
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1768
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 1
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1712
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout 1
                7⤵
                  PID:1608
                  • C:\Windows\SysWOW64\timeout.exe
                    timeout 1
                    8⤵
                    • Delays execution with timeout.exe
                    PID:2032
                • C:\Users\Admin\AppData\Roaming\vlc.exe
                  "C:\Users\Admin\AppData\Roaming\vlc.exe"
                  7⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of SetWindowsHookEx
                  PID:1484

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      MD5

      0fd303b21c1a43c6a9078e6f5280ca85

      SHA1

      0db8f1ae34f4e2e72184e337951fde826c0bd26f

      SHA256

      5d8c6cfdf8fc198c4fd279487e5c1620ece89e39781c6337f4cb5e111e606ddc

      SHA512

      be4cdd48940bead0274c7cf08abd9bc75b5db468159cbf883198712d0bb15ad81a069638c628eba62237cfa0a197f845c0d9e1f4727c9608a8d642f7aba38671

    • C:\Users\Admin\AppData\Roaming\vlc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • C:\Users\Admin\AppData\Roaming\vlc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • C:\Users\Admin\AppData\Roaming\vlc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • C:\Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • C:\Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • C:\Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Admin\AppData\Roaming\vlc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Admin\AppData\Roaming\vlc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • \Users\Public\vbc.exe

      MD5

      75288df36386c8ce9ad16ff78d6cf3ca

      SHA1

      3f8553a2bfeac57bb76cb4e2050d3aa7fa0a111a

      SHA256

      86c9b8f7003a77106c1746a855da645783d6ed30fffa45350554ab2edd0e1290

      SHA512

      7701c1630fa0c19afb98321dc9af635e64080dcbefb356f95051165e84dd27405a919a8ae77e5d38a568a7ce24b9977cd61c45920315c82a73b760080704b0f6

    • memory/672-16-0x0000000000000000-mapping.dmp

    • memory/708-15-0x0000000000000000-mapping.dmp

    • memory/1036-39-0x0000000000000000-mapping.dmp

    • memory/1124-34-0x000000006B6D0000-0x000000006BDBE000-memory.dmp

      Filesize

      6.9MB

    • memory/1124-32-0x0000000000000000-mapping.dmp

    • memory/1124-35-0x0000000000030000-0x0000000000031000-memory.dmp

      Filesize

      4KB

    • memory/1168-27-0x0000000000000000-mapping.dmp

    • memory/1196-38-0x0000000000000000-mapping.dmp

    • memory/1240-17-0x0000000000000000-mapping.dmp

    • memory/1292-24-0x0000000000400000-0x0000000000421000-memory.dmp

      Filesize

      132KB

    • memory/1292-21-0x0000000000413FA4-mapping.dmp

    • memory/1292-20-0x0000000000400000-0x0000000000421000-memory.dmp

      Filesize

      132KB

    • memory/1484-45-0x0000000000413FA4-mapping.dmp

    • memory/1484-47-0x0000000000400000-0x0000000000421000-memory.dmp

      Filesize

      132KB

    • memory/1608-42-0x0000000000000000-mapping.dmp

    • memory/1624-18-0x0000000000000000-mapping.dmp

    • memory/1636-13-0x00000000002E0000-0x000000000030F000-memory.dmp

      Filesize

      188KB

    • memory/1636-11-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

      Filesize

      4KB

    • memory/1636-10-0x000000006BDC0000-0x000000006C4AE000-memory.dmp

      Filesize

      6.9MB

    • memory/1636-7-0x0000000000000000-mapping.dmp

    • memory/1700-19-0x0000000000000000-mapping.dmp

    • memory/1712-41-0x0000000000000000-mapping.dmp

    • memory/1720-25-0x0000000000000000-mapping.dmp

    • memory/1720-28-0x0000000002690000-0x0000000002694000-memory.dmp

      Filesize

      16KB

    • memory/1732-2-0x000007FEF61D0000-0x000007FEF644A000-memory.dmp

      Filesize

      2.5MB

    • memory/1768-40-0x0000000000000000-mapping.dmp

    • memory/1952-14-0x0000000000000000-mapping.dmp

    • memory/2032-43-0x0000000000000000-mapping.dmp