Analysis

  • max time kernel
    147s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    24-08-2024 01:23

General

  • Target

    9a045c9c991d1d135687931fd936236135a9d812a9b1029284114a661f44a2a7.exe

  • Size

    1.1MB

  • MD5

    b11bbc6c3ae4709fa22dd8d9a33bfeac

  • SHA1

    fcbda98feb1d419e0a34b7cb048952a83517e6a3

  • SHA256

    9a045c9c991d1d135687931fd936236135a9d812a9b1029284114a661f44a2a7

  • SHA512

    332afde29fab387fc0bb3036d77aacd80dfb2f75d466e9e882ea3ea499f36282dff668cb0e3d000c7ec79bf8c7cdef1ac472b652e24ab070d6cafa0f91bc6c93

  • SSDEEP

    24576:Rw/vqi/VUNCMyv976OS3Aq3BT6nbvNox4vrY1rbpps8Gs:Rw7VDLXSwsBT6nbVols8Gs

Malware Config

Extracted

Family

remcos

Botnet

YAKI

C2

newsletter208.home-webserver.de:3942

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-4CS32L

  • 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.

  • 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.

  • ModiLoader Second Stage 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Executes dropped EXE 9 IoCs
  • Loads dropped DLL 4 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 13 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Script User-Agent 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a045c9c991d1d135687931fd936236135a9d812a9b1029284114a661f44a2a7.exe
    "C:\Users\Admin\AppData\Local\Temp\9a045c9c991d1d135687931fd936236135a9d812a9b1029284114a661f44a2a7.exe"
    1⤵
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Public\Libraries\bsracnnA.cmd" "
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2888
      • C:\Windows\SysWOW64\esentutl.exe
        C:\\Windows\\System32\\esentutl /y C:\\Windows\\System32\\cmd.exe /d C:\\Users\\Public\\alpha.pif /o
        3⤵
          PID:2288
        • C:\Windows\SysWOW64\esentutl.exe
          C:\\Windows\\System32\\esentutl /y C:\\Windows\\System32\\ping.exe /d C:\\Users\\Public\\xpha.pif /o
          3⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          PID:1852
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c mkdir "\\?\C:\Windows "
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2744
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c mkdir "\\?\C:\Windows \SysWOW64"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2804
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c C:\\Users\\Public\\xpha.pif 127.0.0.1 -n 10
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2872
          • C:\Users\Public\xpha.pif
            C:\\Users\\Public\\xpha.pif 127.0.0.1 -n 10
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:2748
        • C:\Windows \SysWOW64\per.exe
          "C:\\Windows \\SysWOW64\\per.exe
          3⤵
          • Executes dropped EXE
          PID:2656
        • C:\Windows \SysWOW64\per.exe
          "C:\Windows \SysWOW64\per.exe"
          3⤵
          • Executes dropped EXE
          PID:2844
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c del "C:\Users\Public\xpha.pif"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2836
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c rmdir "C:\Windows \SysWOW64
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:3028
        • C:\Users\Public\alpha.pif
          C:\\Users\\Public\\alpha.pif /c rmdir "C:\Windows \"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2084
      • C:\Windows\SysWOW64\esentutl.exe
        C:\\Windows\\System32\\esentutl.exe /y C:\Users\Admin\AppData\Local\Temp\9a045c9c991d1d135687931fd936236135a9d812a9b1029284114a661f44a2a7.exe /d C:\\Users\\Public\\Libraries\\Anncarsb.PIF /o
        2⤵
          PID:3040
        • C:\Windows\SysWOW64\colorcpl.exe
          C:\Windows\System32\colorcpl.exe
          2⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2548
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\ybroojwsnafbukjfdahxwytjm"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2496
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\bvxhpbhmbixgwyxjulczzlgauumns"
            3⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:2332
          • C:\Windows\SysWOW64\colorcpl.exe
            C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\lykzpmsnpqpthftndwoakqbrdbvwlsvq"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2408

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\logs.dat

        Filesize

        144B

        MD5

        41bc46cdbf7b98e2d5266fbecb2111c5

        SHA1

        7d748e283b3e12576712e0c5bdd2260e4ea72740

        SHA256

        7d9a6dacec3d2c20f3468f0a29198f051a8363bc9076bfe5acfc39fdb0b4a03e

        SHA512

        75467c58424222032c5e31dce1eb7a696ff04d9b1bc44ae6bcf2a8a7b8fe6075057710da07672342ad6d637819aa128291f217e8056817117bd0fa012900b318

      • C:\Users\Admin\AppData\Local\Temp\ybroojwsnafbukjfdahxwytjm

        Filesize

        2B

        MD5

        f3b25701fe362ec84616a93a45ce9998

        SHA1

        d62636d8caec13f04e28442a0a6fa1afeb024bbb

        SHA256

        b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

        SHA512

        98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

      • C:\Users\Public\Libraries\bsracnnA.cmd

        Filesize

        60KB

        MD5

        b87f096cbc25570329e2bb59fee57580

        SHA1

        d281d1bf37b4fb46f90973afc65eece3908532b2

        SHA256

        d08ccc9b1e3acc205fe754bad8416964e9711815e9ceed5e6af73d8e9035ec9e

        SHA512

        72901adde38f50cf6d74743c0a546c0fea8b1cd4a18449048a0758a7593a176fc33aad1ebfd955775eefc2b30532bcc18e4f2964b3731b668dd87d94405951f7

      • C:\Windows \SysWOW64\per.exe

        Filesize

        94KB

        MD5

        869640d0a3f838694ab4dfea9e2f544d

        SHA1

        bdc42b280446ba53624ff23f314aadb861566832

        SHA256

        0db4d3ffdb96d13cf3b427af8be66d985728c55ae254e4b67d287797e4c0b323

        SHA512

        6e775cfb350415434b18427d5ff79b930ed3b0b3fc3466bc195a796c95661d4696f2d662dd0e020c3a6c3419c2734468b1d7546712ecec868d2bbfd2bc2468a7

      • \Users\Public\alpha.pif

        Filesize

        295KB

        MD5

        ad7b9c14083b52bc532fba5948342b98

        SHA1

        ee8cbf12d87c4d388f09b4f69bed2e91682920b5

        SHA256

        17f746d82695fa9b35493b41859d39d786d32b23a9d2e00f4011dec7a02402ae

        SHA512

        e12aad20c824187b39edb3c7943709290b5ddbf1b4032988db46f2e86da3cf7e7783f78c82e4dc5da232f666b8f9799a260a1f8e2694eb4d0cdaf78da710fde1

      • \Users\Public\xpha.pif

        Filesize

        15KB

        MD5

        6242e3d67787ccbf4e06ad2982853144

        SHA1

        6ac7947207d999a65890ab25fe344955da35028e

        SHA256

        4ca10dba7ff487fdb3f1362a3681d7d929f5aa1262cdfd31b04c30826983fb1d

        SHA512

        7d0d457e1537d624119a8023bcc086575696a5739c0460ef11554afac13af5e5d1edc7629a10e62834aba9f1b3ab1442011b15b4c3930399d91dca34b3b1cbaf

      • memory/1668-4-0x0000000000400000-0x0000000000521000-memory.dmp

        Filesize

        1.1MB

      • memory/1668-2-0x00000000031F0000-0x00000000041F0000-memory.dmp

        Filesize

        16.0MB

      • memory/1668-0-0x0000000000300000-0x0000000000301000-memory.dmp

        Filesize

        4KB

      • memory/1668-1-0x00000000031F0000-0x00000000041F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2332-85-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2332-89-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2332-92-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2408-93-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2408-88-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2408-91-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2496-86-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2496-83-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2496-82-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2496-90-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2548-74-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-81-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-79-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-78-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-77-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-76-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-75-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-100-0x0000000014C20000-0x0000000014C39000-memory.dmp

        Filesize

        100KB

      • memory/2548-104-0x0000000014C20000-0x0000000014C39000-memory.dmp

        Filesize

        100KB

      • memory/2548-103-0x0000000014C20000-0x0000000014C39000-memory.dmp

        Filesize

        100KB

      • memory/2548-105-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-107-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-108-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-72-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-115-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-123-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-124-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB

      • memory/2548-131-0x00000000007F0000-0x00000000017F0000-memory.dmp

        Filesize

        16.0MB