Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-04-2024 02:54

General

  • Target

    f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe

  • Size

    1.6MB

  • MD5

    eac95a52ac634d3ea75387201a2c749c

  • SHA1

    e808ef56d1b382b1e01e16af299a548cb038f52c

  • SHA256

    f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63

  • SHA512

    6ae5883a1cb8aaa42abc0c8bbfeba2715086ec39ad2028937600b2c925b3093070a72531e4e5abf2d4dafb00bcbab8c2fd5f97aae590dd87645befc27701d346

  • SSDEEP

    49152:ay6imwGhfj4GBT2z95Zw/L+gwnzFnwyuPTh:azimw4f8iSuD+g

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:45671

127.0.0.1:55677

192.3.101.8:55677

192.3.101.8:45671

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-2P1XPK

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

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

  • Remcos

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

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 19 IoCs
  • Detects executables built or packed with MPress PE compressor 19 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
  • ModiLoader Second Stage 1 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Executes dropped EXE 1 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe
    "C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3008
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c mkdir "\\?\C:\Windows "
      2⤵
        PID:4060
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows \System32"
        2⤵
          PID:3468
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c "C:\Windows \System32\8346219.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3176
          • C:\Windows \System32\8346219.exe
            "C:\Windows \System32\8346219.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:4132
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:1564
              • C:\Windows\system32\cmd.exe
                cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:4988
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                  6⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2216
        • C:\Windows\SysWOW64\extrac32.exe
          C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe C:\\Users\\Public\\Libraries\\Dkesuvii.PIF
          2⤵
            PID:1552
          • C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe
            C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe /stext "C:\Users\Admin\AppData\Local\Temp\sthfwhutkfvrplkwmdpxzxvepeo"
            2⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4272
          • C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe
            C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe /stext "C:\Users\Admin\AppData\Local\Temp\dvnyxafngnnwsryadncrkcqnylfkxz"
            2⤵
            • Accesses Microsoft Outlook accounts
            PID:1928
          • C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe
            C:\Users\Admin\AppData\Local\Temp\f7f1798e3d66880f2cb35f6764a1c32902abb3ce7ceafe0bc049496ca9161e63.exe /stext "C:\Users\Admin\AppData\Local\Temp\nqsjxsqouvfbcxvmmypsvpkezzplykujhy"
            2⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4704

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Persistence

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Privilege Escalation

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Defense Evasion

        Modify Registry

        1
        T1112

        Credential Access

        Unsecured Credentials

        1
        T1552

        Credentials In Files

        1
        T1552.001

        Collection

        Data from Local System

        1
        T1005

        Email Collection

        1
        T1114

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat
          Filesize

          144B

          MD5

          eb4e1b254ae1b542a4fd49dce9f6e965

          SHA1

          ecd318fc3e43ae0b440578387024bc8af97ddaef

          SHA256

          710ba06a079e4e480ef37053731acd79fbf9c136b5a954216752bd3dd55bfb58

          SHA512

          7b009bf15449a1717577cdc687a4d6d1b7bf7d4318507b9f98fbee14daa83fb2c75dc5740b4df14e495d157ef1e97a2c3e6215e9ecd6f1de0c6d1b225066440e

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wwhtumin.feb.ps1
          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\sthfwhutkfvrplkwmdpxzxvepeo
          Filesize

          4KB

          MD5

          32a7b06ba8a0426235849b55b563b06b

          SHA1

          47157e4608ac7375544e6a59c7353f5bea8167f5

          SHA256

          14bb01cde2127abdc8cbef51092d1327d4fc63d40b47ca4621947c0dd8475e52

          SHA512

          0a610acf3ee1abcbb198d0d52de567d8c40d3460897ad9cb53d1a9cc463935b13c13e880b23716a429d8680794d24e1d1ecfce2f386e3861798bd03bbf1f8cf6

        • C:\Windows \System32\8346219.exe
          Filesize

          128KB

          MD5

          231ce1e1d7d98b44371ffff407d68b59

          SHA1

          25510d0f6353dbf0c9f72fc880de7585e34b28ff

          SHA256

          30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

          SHA512

          520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

        • C:\Windows \System32\netutils.dll
          Filesize

          112KB

          MD5

          8541304aadba4ae8620bb2699f6e0437

          SHA1

          e0b28a6ecd32d3789433217364c1006de9892df8

          SHA256

          50573c81e5773c13a5411e8446d7fb17956865675782239818f7affd40a2fecb

          SHA512

          c18b1233c138229705242e1cdc00970e45e414d8da9c643b1196ec9de261ae18076e22bed6fcc48c07d1f0e851469db9147f083f3c3c76a26b75994419392455

        • C:\windows \system32\KDECO.bat
          Filesize

          11KB

          MD5

          c545650595b479c81ad6b9d8882aae39

          SHA1

          7a98aa2e6eee23b3c1bba876955d525bc618b3f0

          SHA256

          a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9

          SHA512

          85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3

        • memory/1928-60-0x0000000000400000-0x0000000000462000-memory.dmp
          Filesize

          392KB

        • memory/1928-72-0x0000000000400000-0x0000000000462000-memory.dmp
          Filesize

          392KB

        • memory/1928-76-0x0000000000400000-0x0000000000462000-memory.dmp
          Filesize

          392KB

        • memory/1928-69-0x0000000000400000-0x0000000000462000-memory.dmp
          Filesize

          392KB

        • memory/2216-26-0x0000019734880000-0x00000197348A2000-memory.dmp
          Filesize

          136KB

        • memory/2216-27-0x00007FF8403A0000-0x00007FF840E61000-memory.dmp
          Filesize

          10.8MB

        • memory/2216-28-0x00000197326D0000-0x00000197326E0000-memory.dmp
          Filesize

          64KB

        • memory/2216-32-0x00000197326D0000-0x00000197326E0000-memory.dmp
          Filesize

          64KB

        • memory/2216-30-0x00000197326D0000-0x00000197326E0000-memory.dmp
          Filesize

          64KB

        • memory/2216-33-0x00007FF8403A0000-0x00007FF840E61000-memory.dmp
          Filesize

          10.8MB

        • memory/3008-92-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/3008-99-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-44-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-46-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-48-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-52-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-53-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-54-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-55-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-57-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-43-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-42-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-133-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-132-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-40-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-96-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/3008-4-0x0000000000400000-0x00000000005AF000-memory.dmp
          Filesize

          1.7MB

        • memory/3008-121-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-111-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-110-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-106-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/3008-1-0x0000000002AD0000-0x0000000003AD0000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-95-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-98-0x0000000015190000-0x0000000016190000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-2-0x0000000002AD0000-0x0000000003AD0000-memory.dmp
          Filesize

          16.0MB

        • memory/3008-89-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/3008-0-0x0000000000AB0000-0x0000000000AB1000-memory.dmp
          Filesize

          4KB

        • memory/3008-94-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/3008-93-0x0000000033DD0000-0x0000000033DE9000-memory.dmp
          Filesize

          100KB

        • memory/4132-16-0x00000000613C0000-0x00000000613E3000-memory.dmp
          Filesize

          140KB

        • memory/4272-59-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/4272-86-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/4272-73-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/4272-67-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/4272-65-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/4704-66-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/4704-75-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/4704-84-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/4704-83-0x0000000000430000-0x00000000004F9000-memory.dmp
          Filesize

          804KB

        • memory/4704-82-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB