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Analysis

  • max time kernel
    58s
  • max time network
    41s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    27/08/2024, 21:32

General

  • Target

    2819ddc5b45aec8e553a8ba973a5e555d733dc45f38d3566dc2f0d1e7761ac32.docx

  • Size

    179KB

  • MD5

    dddc62fe7387455520e9eb696b4292fd

  • SHA1

    88f4353640f565178c8e4986d8cea7a03b1d14c4

  • SHA256

    2819ddc5b45aec8e553a8ba973a5e555d733dc45f38d3566dc2f0d1e7761ac32

  • SHA512

    e7334d487cd7137a1af8880c31086a9bb59b445ccd91346bc005ce7a5bd0026ab9a2854977463662eab7a148963376245b2917373a890a09ae5898999ebd1661

  • SSDEEP

    3072:aiY5rj1ATug+mhTZMxjcFQ9csn4qAzYjDp/shKuikycBSRjR/Vx7XUwV5h:w5r/g+qZMpcFSQzYHut4dNHh

Malware Config

Extracted

Family

remcos

Botnet

AUG 26

C2

sungito2.ddns.net:6509

154.216.19.222:5532

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-LXAZN2

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Blocklisted process makes network request 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Downloads MZ/PE file
  • Abuses OpenXML format to download file from external location
  • 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.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

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

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\2819ddc5b45aec8e553a8ba973a5e555d733dc45f38d3566dc2f0d1e7761ac32.docx"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3024
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1652
    • 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
      • System Location Discovery: System Language Discovery
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1256
      • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
        "C:\Users\Admin\AppData\Roaming\sinbless09185.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2364
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\sinbless09185.exe"
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2024
        • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
          "C:\Users\Admin\AppData\Roaming\sinbless09185.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2072
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\dlwifwadmgr"
            4⤵
            • Executes dropped EXE
            PID:1400
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\dlwifwadmgr"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1828
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\ngcafpkfaojppcu"
            4⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1936
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\qiplghdzowburiifxw"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:1856

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      328B

      MD5

      11ea9c4bc3cc128a893a8db682ff4da4

      SHA1

      2c20103254a6f72c92bb59a5c077f382a59672e4

      SHA256

      98dbc13169055cea8022d60f617ef1e91fbc6a9cf962983e02b6e3e5d824a0d5

      SHA512

      76014711d94d33eecbfc812aad25a2ac48fb05b988cda330a0ae497a7187859a10119db5e35c17136c57f89fcbd8c5f0ecc52f1418bd0b65688a4d1df28ff8dd

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\FSD-{3B464A4C-3823-486F-836C-1D86BB54A4AC}.FSD

      Filesize

      128KB

      MD5

      3dbdc98ed6cc655aa26b5db2d22b901d

      SHA1

      be25d714c26b0d03ec6e4e50ba13f3a21829699b

      SHA256

      19e3435602dd01b09491139797a19f421af7b40b70890ff4a49688eee2c86087

      SHA512

      d6d0160735de84516978d95ff29d53c184180c42112c3795a609ac1d89627fb9a7646f46c8b46058db9ac67d9eb8d97fb5e909af117925553a6adacf0dd8b453

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\LocalCacheFileEditManager\FSD-CNRY.FSD

      Filesize

      128KB

      MD5

      8c9ddb6b0924e8fce7d87f27b799ee62

      SHA1

      9d50074e832ed1b469d4d44a9a6411e74e53b8b9

      SHA256

      1a38dc6bd8eb723d6b731775669be3cc5cf54a19bf4f6989c7df57a34118eeca

      SHA512

      bd42085fa6751debe041118ef7574eb69c6e5a79e782d0cdbf69da8f430ebe531ab8607a98fc5f7c719f41c7af7daa5c0f854aa71c758975c08b992d15d69caa

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\LocalCacheFileEditManager\FSD-CNRY.FSD

      Filesize

      128KB

      MD5

      e1d25fe27dfa2e745cc7e74befbd9850

      SHA1

      e4dc99ade5b3b2e9f4dc1a6ab981289b6c02c127

      SHA256

      1bd0bf59e082895cd4f88c0aa58c3da2d9cce22233a58bd699ce4fc7fcb87526

      SHA512

      34dd549602ec92635a775aa9bbfd265fc4e36c8a74074c5c765bb67e64f69fc9491ea09f9e5397072c5f4408bdd840fefa74afd297ae49d6a5306756e86056b9

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\LocalCacheFileEditManager\FSD-{BB7CEC0D-4284-4DB8-A30B-4AB84EB9E012}.FSD

      Filesize

      128KB

      MD5

      26ee38954d84dec07d296514082bb731

      SHA1

      b80e8c355368946c52f860b405ce7a7923bce21b

      SHA256

      41c062f7859fb9ebdc72d2ae357aa4afda44509a3346c7493132f40efc237c29

      SHA512

      9db9d0429aaf8a40819cf5da56efcb68acdde766798c3bcdc323a53cc8aa690bde9cdc0bbd9d43dde8114a0d8455adc00bcbc8a731c973dea85c5883671246f0

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6XUZ2JLF\thrylPXnvfySmGN[1].doc

      Filesize

      766KB

      MD5

      c0d48716ea8eef0d46d77cc231fa5371

      SHA1

      1438d2234f6a36f27aa9b0c2465e71fd607a26c3

      SHA256

      6c98f35634c02c4cc1d7cbc628ba843c85e80559c1b1d51d44efb3e3bbfc40f6

      SHA512

      3fecda49692f47df4b3971d505b4a0920c6cff73433656e25144e87755b48f68d5b56aa087a1df204b46c1e8b312d580aef453cb3815377030e788047299e73b

    • C:\Users\Admin\AppData\Local\Temp\{9A59AC11-9E02-4FD1-871F-953ED7612D4B}

      Filesize

      128KB

      MD5

      79822ac1df8f0064fd25d7d1739fe480

      SHA1

      67297f78e4dc537cd74dfbce24e368bb3a280147

      SHA256

      60f6b8d81935a0b9fbff2ee7e1fc27757edf40fbecc6b5e5202640a0fa0be40d

      SHA512

      b444227058c03302e450e2788311964be949698ab61c299502418448b2e5b57e1f331f90150beb1579c374c12891786bf04b27d5c226b0272afdb9633f06c826

    • C:\Users\Admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0409.lex

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • \Users\Admin\AppData\Roaming\sinbless09185.exe

      Filesize

      928KB

      MD5

      04d4d4d83e1601d220f83f09ae16cd79

      SHA1

      4f0a7d8060399a7ae5029690bdee2bf3b2e3e395

      SHA256

      86b19710e100964d95cfa01201152d4e73f1297f7286207feeb01cdb7e55efc8

      SHA512

      87747374bd1c72c9d33d2af9e7456617c95e6c100788f16123bf15cb1c6748a13ad1ac9b5a967553fdf668ea226033a741c08f45febc2130a7e50ccabe69333c

    • memory/1828-146-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1828-152-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1828-155-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1828-147-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1856-159-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1856-160-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1856-157-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1936-153-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1936-154-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1936-150-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2072-122-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-132-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-129-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-126-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-124-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-176-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-120-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-118-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-116-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-136-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-139-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-140-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-141-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-142-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-144-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-131-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-135-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-128-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2072-112-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-115-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-177-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-172-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2072-170-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2072-171-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2072-167-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2364-94-0x0000000001380000-0x000000000146A000-memory.dmp

      Filesize

      936KB

    • memory/2364-100-0x0000000000950000-0x0000000000968000-memory.dmp

      Filesize

      96KB

    • memory/2364-111-0x0000000005BB0000-0x0000000005C70000-memory.dmp

      Filesize

      768KB

    • memory/3024-2-0x0000000070E8D000-0x0000000070E98000-memory.dmp

      Filesize

      44KB

    • memory/3024-110-0x0000000070E8D000-0x0000000070E98000-memory.dmp

      Filesize

      44KB

    • memory/3024-0-0x000000002FF81000-0x000000002FF82000-memory.dmp

      Filesize

      4KB

    • memory/3024-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB