Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    28-08-2024 14:54

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 3 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 AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2492
    • 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:2692
      • 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:1476
        • 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:2012
        • 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:1192
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\xmxdwisraxfodqllhuccqdtakay"
            4⤵
            • Executes dropped EXE
            PID:532
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\xmxdwisraxfodqllhuccqdtakay"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2444
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\hodnxsdsofxtfwhpyfpwtifrthhqtey"
            4⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:2436
          • C:\Users\Admin\AppData\Roaming\sinbless09185.exe
            C:\Users\Admin\AppData\Roaming\sinbless09185.exe /stext "C:\Users\Admin\AppData\Local\Temp\sjqgykomcnpgqcvthqjxeuaicvzzuhpkwh"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:1468

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      328B

      MD5

      f7790e32d22dd2d75d70b8612680e47a

      SHA1

      33abfb6d7b35f843d1a72983a9d5b2cc07bd0c1d

      SHA256

      89dffb9f82e95cc9aff6c6df87a7aba02940431768e55e3b36de9e3fa5a095b2

      SHA512

      880889d6b7d2ed3acd152d0c9bb725b4df3048716263e79e31004d8ea212c840852c80c56a7560c9dd17a858bf37b345bf85f53991fc51b65e112e696145db40

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

      Filesize

      128KB

      MD5

      01af936877608305a374174233de4916

      SHA1

      4ffcc809b08a4fb45c71c098d35204abcce2b88c

      SHA256

      4f4d3b83e9e519730c7c21761058bed0186c209717efc05006646c93d2ee0dd5

      SHA512

      a734a78f6058f8c1ab083eb300fce83bfc37da8761ff49cb222dbf12d243c39d59ea550e4826f9371e2d50b03a51dff8d4c543a61b60e9484fed76af72246ab9

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\FSD-{753C3525-B62A-4A14-9CB1-215C7D3F1F91}.FSD

      Filesize

      128KB

      MD5

      e9cab2cd3f37f89e13f6a1ca1ba2a569

      SHA1

      d3ca0ee368523d0d8bb028cd57c3f6b2864e68b7

      SHA256

      a4b975948badcbea0451be16ca4512e5372844a2b71f6ef6c32c75ad0d52db00

      SHA512

      3bad81452d1d773bec4ea95c779dd3ad82abf46774699744949d997dd655981250b3499526c2a9898a58abbb8e86f67127923e56512c15aec788173c89b69077

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

      Filesize

      128KB

      MD5

      2f67bd991de48f4ef8f670264b814472

      SHA1

      e584951f598a6e15d492251b1098b3bf98da1b43

      SHA256

      4952b0dc4b2274ccf0871e703db28c9cb7a479e16840801107132346f60d100b

      SHA512

      a34ad8ba14b0937a36cf163ee7684aa5786909bff160cacd39986dcaf8642ca6834c5ef76e9aa3ae2071f3dac2f8c494a67cfa2112a9ffd3dcd9768273d200ee

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\LocalCacheFileEditManager\FSD-{80EDDE46-99A9-43B4-9D89-D7F1A21FC70A}.FSD

      Filesize

      128KB

      MD5

      cf709e39fdec182e4624abd89d366929

      SHA1

      b498404db10c8ad108b476463384d6cb4682630a

      SHA256

      e2320357682f016716ca7fcfec23bcb5ebf3f7c84ba723a3d8ff128eb8265b4d

      SHA512

      deba414fc026f1a2cdb860e932e8079447313c73a55f9b311a3454797b3571903a38a900b425aa5b6d46b73a50e515dfe460008dc172be0d50651857d1aa8c8d

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\5J67VDZD\thrylPXnvfySmGN[1].doc

      Filesize

      766KB

      MD5

      c0d48716ea8eef0d46d77cc231fa5371

      SHA1

      1438d2234f6a36f27aa9b0c2465e71fd607a26c3

      SHA256

      6c98f35634c02c4cc1d7cbc628ba843c85e80559c1b1d51d44efb3e3bbfc40f6

      SHA512

      3fecda49692f47df4b3971d505b4a0920c6cff73433656e25144e87755b48f68d5b56aa087a1df204b46c1e8b312d580aef453cb3815377030e788047299e73b

    • C:\Users\Admin\AppData\Local\Temp\{E6F6E894-856C-48E6-A7F0-D4C3AB7EF0F2}

      Filesize

      128KB

      MD5

      dd4f9c3376949ead924d38190a9d90dd

      SHA1

      0a8995b4def44d439dd583575aa8d44d8e4bbf66

      SHA256

      22581454e11995f2ac52bc607449f29194224daab9b10ace7f0c8ca64f043657

      SHA512

      21ecc83d0244388b499cc1773e788b332d77c32f3bb74ce3ca8abafb6af493959790729a87226b865c60ff47b42815cf3d3715869c123200567ba6c10431f59f

    • C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat

      Filesize

      381B

      MD5

      762ed5436895d3295ad0898ffe4ea523

      SHA1

      fe4684b89b82792b9775ec2de5a5fd3e4de46dab

      SHA256

      e714f67206eea7b9d6a69d9c7f2552b722cd8db84c25891bb9f4849a83c1a831

      SHA512

      abcdad2c5a37e0ee38c24cc6aacb7a704d455b998e6c303145d3404e1a4e768d666b4746d0423e7be0c32a5e7f90a027909d51d28bf8598a088419d76fdb5d0e

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

      Filesize

      19KB

      MD5

      6c8d629657bfd0f8201d1f08fe7c5824

      SHA1

      a0189ba9eec11108112cc565ab241684ed3c2d84

      SHA256

      b0c7dfd3ffbe7970f672fe75ae024e6e7a0be20132ccdd2d17976be4481ed4f7

      SHA512

      148ca71c3075d8ebb491a6cde8012391828ccc91a737f64d55118da3615bb67f3a78c742e31304ffd4fcf265392fd450da49f4e2f2e2699f849993c7f4b38ebf

    • 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/1192-139-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-146-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-230-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-229-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-221-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-112-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-114-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-116-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-136-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-135-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-132-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-131-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-129-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-128-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1192-126-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-124-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-122-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-120-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-118-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-222-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-140-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-141-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-142-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-144-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-147-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-190-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-189-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-182-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-181-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-175-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1192-173-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1192-174-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1192-170-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1468-162-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1468-160-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1468-163-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1476-94-0x0000000000F20000-0x000000000100A000-memory.dmp

      Filesize

      936KB

    • memory/1476-111-0x0000000004F10000-0x0000000004FD0000-memory.dmp

      Filesize

      768KB

    • memory/1476-100-0x00000000004E0000-0x00000000004F8000-memory.dmp

      Filesize

      96KB

    • memory/2436-153-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2436-156-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2436-158-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2444-150-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2444-157-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2444-155-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2460-2-0x0000000070FCD000-0x0000000070FD8000-memory.dmp

      Filesize

      44KB

    • memory/2460-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2460-216-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2460-217-0x0000000070FCD000-0x0000000070FD8000-memory.dmp

      Filesize

      44KB

    • memory/2460-0-0x000000002FEA1000-0x000000002FEA2000-memory.dmp

      Filesize

      4KB

    • memory/2460-101-0x0000000070FCD000-0x0000000070FD8000-memory.dmp

      Filesize

      44KB