Analysis

  • max time kernel
    151s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-04-2024 01:18

General

  • Target

    554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe

  • Size

    966KB

  • MD5

    9beaec299e48eb0072fd6e270d8e8cd3

  • SHA1

    a719b69d48a210af3749bccd27b4ad5185c35d8d

  • SHA256

    554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0

  • SHA512

    d0742bee412db3abdb8ddee99ceaf45721f6c72c2b9044838d755b6e8a51377831177eb087f709efee31dc36871e2e274338734731e3d89519bebfb1e74c0733

  • SSDEEP

    24576:dtHKWYHu2k6ei445zcNjNGbr3SN2jcjR11O7Akmla:7KWYHu2kf745zCa3SN2jcjRuUkK

Malware Config

Extracted

Family

remcos

Botnet

BUDDY

C2

192.210.201.57:52499

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-LMLI87

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 23 IoCs
  • Detects executables built or packed with MPress PE compressor 21 IoCs
  • Detects executables packed with SmartAssembly 2 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 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 2 IoCs
  • Suspicious use of SetThreadContext 7 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
    "C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2236
    • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
      "C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4988
      • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
        C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\mjlbefdzdcrqwpbiqvy"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4536
      • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
        C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\wdqmexobrkjdzvpmaflrvc"
        3⤵
          PID:4464
        • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
          C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\wdqmexobrkjdzvpmaflrvc"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1988
        • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
          C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\zfvefqyufsbijjlyrqytypoux"
          3⤵
          • Suspicious use of UnmapMainImage
          PID:5016
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 5016 -s 12
            4⤵
            • Program crash
            PID:2680
        • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
          C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\eowocpwigxxgxqdib"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4440
        • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
          C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\ojkhdzgbufpliwsmlqlhb"
          3⤵
            PID:2336
          • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
            C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\ojkhdzgbufpliwsmlqlhb"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:3160
          • C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe
            C:\Users\Admin\AppData\Local\Temp\554b40336bad24df88cbde544cdf20d553d02ce7fee5dab9a82318d7c21471e0.exe /stext "C:\Users\Admin\AppData\Local\Temp\qlpreszdqnhykloqcagimubk"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:420
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5016 -ip 5016
        1⤵
          PID:4932
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3916 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
          1⤵
            PID:940

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          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

            0e6994c6837b4f56b3f3ffaf5933bd14

            SHA1

            835b00d9774f2b8d933b881e951c37b6d19e6d3b

            SHA256

            0c2f182defe1496992207c3ef49cf43ca36ac8df59bd317bd109ed248835920e

            SHA512

            b9323647c76bca0c5eb3df1805f0b749b7d97f5fdceb74898331b0a684287f28403053f9b1367133efa18d5b1bb6221d58a0fbdcc8c5a845f475ed6084bc2561

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

            4KB

            MD5

            10fa8ec140c204486092fb161e567ec7

            SHA1

            4d63e1f8df3afefedb19df73d7ee5f3b1e7b6473

            SHA256

            7176ca3d0196ec46f178107fdb587adaef3f6ea65daa80eccd2371a515880e04

            SHA512

            9db4eeb3f07d8d0579f75f3426c91156809152d8c1a37c9a27bf159888f6dd97f1212ac80f5bbb17e4d86f3087c512ccba2ca50a2db07d071370bd36364e1f76

          • memory/420-66-0x0000000000400000-0x0000000000424000-memory.dmp
            Filesize

            144KB

          • memory/420-69-0x0000000000400000-0x0000000000424000-memory.dmp
            Filesize

            144KB

          • memory/420-78-0x0000000000400000-0x0000000000424000-memory.dmp
            Filesize

            144KB

          • memory/1988-31-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/1988-36-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/1988-41-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/1988-27-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/2236-8-0x0000000006FE0000-0x00000000070A0000-memory.dmp
            Filesize

            768KB

          • memory/2236-7-0x0000000006B00000-0x0000000006B0C000-memory.dmp
            Filesize

            48KB

          • memory/2236-2-0x0000000005E70000-0x0000000006414000-memory.dmp
            Filesize

            5.6MB

          • memory/2236-9-0x0000000009680000-0x000000000971C000-memory.dmp
            Filesize

            624KB

          • memory/2236-4-0x0000000005870000-0x0000000005880000-memory.dmp
            Filesize

            64KB

          • memory/2236-10-0x00000000747D0000-0x0000000074F80000-memory.dmp
            Filesize

            7.7MB

          • memory/2236-3-0x00000000058C0000-0x0000000005952000-memory.dmp
            Filesize

            584KB

          • memory/2236-15-0x00000000747D0000-0x0000000074F80000-memory.dmp
            Filesize

            7.7MB

          • memory/2236-1-0x0000000000D80000-0x0000000000E76000-memory.dmp
            Filesize

            984KB

          • memory/2236-6-0x0000000005E60000-0x0000000005E70000-memory.dmp
            Filesize

            64KB

          • memory/2236-0-0x00000000747D0000-0x0000000074F80000-memory.dmp
            Filesize

            7.7MB

          • memory/2236-5-0x0000000005890000-0x000000000589A000-memory.dmp
            Filesize

            40KB

          • memory/3160-61-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/3160-67-0x0000000000400000-0x0000000000462000-memory.dmp
            Filesize

            392KB

          • memory/4440-80-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4536-32-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4536-33-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4536-26-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4536-72-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4536-34-0x0000000000400000-0x0000000000478000-memory.dmp
            Filesize

            480KB

          • memory/4988-16-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-82-0x0000000010000000-0x0000000010019000-memory.dmp
            Filesize

            100KB

          • memory/4988-23-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-22-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-43-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-50-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-51-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-21-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-20-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-19-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-17-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-25-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-116-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-13-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-12-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-24-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-85-0x0000000010000000-0x0000000010019000-memory.dmp
            Filesize

            100KB

          • memory/4988-86-0x0000000010000000-0x0000000010019000-memory.dmp
            Filesize

            100KB

          • memory/4988-87-0x0000000010000000-0x0000000010019000-memory.dmp
            Filesize

            100KB

          • memory/4988-88-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-115-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-91-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-11-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-97-0x0000000010000000-0x0000000010019000-memory.dmp
            Filesize

            100KB

          • memory/4988-99-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-100-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-107-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/4988-108-0x0000000000400000-0x0000000000482000-memory.dmp
            Filesize

            520KB

          • memory/5016-90-0x0000000000380000-0x0000000000380000-memory.dmp
          • memory/5016-29-0x0000000000400000-0x0000000000424000-memory.dmp
            Filesize

            144KB