Analysis

  • max time kernel
    147s
  • max time network
    132s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    23-08-2024 02:41

General

  • Target

    c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24.exe

  • Size

    998KB

  • MD5

    2732e2eb4efa4972d94d993a31a67f44

  • SHA1

    60e02e1d0f4f002532f7ea2fc24adaf80db430bd

  • SHA256

    c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24

  • SHA512

    159dcaae380279a2a68280c75d4a6fc53a9c79a846cfd31a42e250922e815e1e665faeb4ca017ecdc375439b2abdf98e62baaffead599db23e488adf4e792531

  • SSDEEP

    24576:4ALYnT2KsbNqGuYsqf3hfGwuvMSNMTosRap+EyT:4xT9oqVq5fPcMS/tp+F

Malware Config

Extracted

Family

remcos

Botnet

CLIENT

C2

64.188.18.85:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    xlorers.exe

  • copy_folder

    xlorers

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-GK0LTU

  • 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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 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 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24.exe
    "C:\Users\Admin\AppData\Local\Temp\c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YexrSjnKtvvgI.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2768
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YexrSjnKtvvgI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9EFD.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2404
    • C:\Users\Admin\AppData\Local\Temp\c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24.exe
      "C:\Users\Admin\AppData\Local\Temp\c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2548
      • C:\ProgramData\xlorers\xlorers.exe
        "C:\ProgramData\xlorers\xlorers.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:320
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YexrSjnKtvvgI.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2028
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YexrSjnKtvvgI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEF6E.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1320
        • C:\ProgramData\xlorers\xlorers.exe
          "C:\ProgramData\xlorers\xlorers.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1828
          • C:\ProgramData\xlorers\xlorers.exe
            C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\lnunwrinrqbcqkdqosudet"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1052
          • C:\ProgramData\xlorers\xlorers.exe
            C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\whzywjthfytptqzcxdhehyvaxw"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1216
          • C:\ProgramData\xlorers\xlorers.exe
            C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\yjerpceibgludengoobgrlpjgluku"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Local\Temp\tmp9EFD.tmp

    Filesize

    1KB

    MD5

    a3eb04a16d4f7cb312bf49ca74720ac7

    SHA1

    cfb1589d13a1ba35d97ba45483be8ff2853e6d50

    SHA256

    374ba39c61107eca9078e7de2c5a33b435606024ca0a3dd42f4941c189dc07ef

    SHA512

    1c6175514ccf2c7e6125b528644c60f973feded07fca0686c8a5598d0c2fe24d558972a12dbfc61844ac951ea048490eae56f9b6cd139dd3ff3f737e980347d3

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    ca87f60cddf6e952fe6e46680b085e48

    SHA1

    976470706c8e53ced7f060f1a29d6fd1778d0432

    SHA256

    acabf52b0437685f916373104ca55bf3a191b44499eb0083a48fbb3f1617b9e5

    SHA512

    1d8c33a02b89b0ce9afcc26147022cc83e856d4675773ab2cc0103bd674e498490f4832a7d42737d83f3acfdf201b1a732edda18f870b102e978e06d6ba1c1fc

  • \ProgramData\xlorers\xlorers.exe

    Filesize

    998KB

    MD5

    2732e2eb4efa4972d94d993a31a67f44

    SHA1

    60e02e1d0f4f002532f7ea2fc24adaf80db430bd

    SHA256

    c733793c396f98ec7eccf793a4ecb71c1af71b6106d202afe28df463d5a60a24

    SHA512

    159dcaae380279a2a68280c75d4a6fc53a9c79a846cfd31a42e250922e815e1e665faeb4ca017ecdc375439b2abdf98e62baaffead599db23e488adf4e792531

  • memory/320-45-0x00000000004F0000-0x0000000000506000-memory.dmp

    Filesize

    88KB

  • memory/320-44-0x0000000000E00000-0x0000000000F00000-memory.dmp

    Filesize

    1024KB

  • memory/1052-82-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1052-87-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1052-89-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1216-88-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1216-85-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1216-90-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1828-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-101-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1828-107-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-106-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-104-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1828-105-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1828-80-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-72-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-76-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-75-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1828-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1828-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2220-37-0x00000000741C0000-0x00000000748AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-0-0x00000000741CE000-0x00000000741CF000-memory.dmp

    Filesize

    4KB

  • memory/2220-4-0x00000000741C0000-0x00000000748AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-3-0x0000000000920000-0x000000000093E000-memory.dmp

    Filesize

    120KB

  • memory/2220-2-0x00000000741C0000-0x00000000748AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-1-0x0000000000B30000-0x0000000000C30000-memory.dmp

    Filesize

    1024KB

  • memory/2220-6-0x0000000005390000-0x0000000005450000-memory.dmp

    Filesize

    768KB

  • memory/2220-5-0x0000000000500000-0x0000000000516000-memory.dmp

    Filesize

    88KB

  • memory/2548-17-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2548-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2920-94-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2920-92-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2920-95-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB