Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    23-05-2024 09:01

General

  • Target

    #Inv_PI_{number_12}_pdf.exe

  • Size

    1.1MB

  • MD5

    96a62642b79fcb88da4f854b2c46c64c

  • SHA1

    1778d5bad1acb999458092745af2a6ac3fce39a3

  • SHA256

    472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1

  • SHA512

    4643ede4706e904a6b6efd4c59d29c5a58c3aa3614de1d4d17e02d8ad33c4ecfd2bfe61de335e726c8ec085717afef77e9146eab4f71fd8a25758a2f3612d457

  • SSDEEP

    24576:+8lmSlcXrLArMThOTAiVOpoUJ3jEDFXF9bo:9mSubfQrVS1xjcFDo

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

45.95.169.137:2404

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

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NG20QI

  • 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.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • 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 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 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 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\#Inv_PI_{number_12}_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • 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\GxGUIRTmI.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2616
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp36F8.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2684
    • C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2484
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GxGUIRTmI.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1944
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6078.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:808
        • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
          "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1564
          • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
            C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\gpbapkurith"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            PID:2068
          • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
            C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\rjhspcfswbzerfu"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            PID:536
          • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
            C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\blmlivqmkjrjbtqurx"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:684

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Local\Temp\tmp36F8.tmp

    Filesize

    1KB

    MD5

    5a8d04da6debef7b7c2e20fb4e21b004

    SHA1

    ca7ebaef07178192989daff8c05d4b0d08795ea4

    SHA256

    ab9aabb0426f3411bda3a887a67d590aba725d40178c55983dff8d15bd4cf192

    SHA512

    1943fffe667c3698fa677fe7e73cb043764d02cb4db2c08e329dd7b386c08d1d93fdb714a0d6f52158ab6facb10adedc5b024b4b0f02a84bd66440b32870f17e

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

    Filesize

    7KB

    MD5

    d6201b12503e9e6132157e977836ee23

    SHA1

    c8ddf12a42e037678953637ea3f6cabfb31c0e4e

    SHA256

    6a04e46864ad5a9b7e5091e82ace530516a52663a8d2a2bdf3ad525f09a21260

    SHA512

    ad96a5b9f2dfb92f738967b2f937bcc09870cd6bc600b8ba394ed4a163a9421271f0c009446bcd80dbfe67c16a912acb96c2755a6b158adf967164329cf7f7eb

  • \??\PIPE\srvsvc

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • \Users\Admin\AppData\Roaming\Remcos\remcos.exe

    Filesize

    1.1MB

    MD5

    96a62642b79fcb88da4f854b2c46c64c

    SHA1

    1778d5bad1acb999458092745af2a6ac3fce39a3

    SHA256

    472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1

    SHA512

    4643ede4706e904a6b6efd4c59d29c5a58c3aa3614de1d4d17e02d8ad33c4ecfd2bfe61de335e726c8ec085717afef77e9146eab4f71fd8a25758a2f3612d457

  • memory/536-89-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/536-84-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/536-92-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/684-93-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/684-91-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/684-86-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/684-85-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1564-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-99-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1564-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-68-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-72-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-71-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1564-102-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1564-103-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1564-70-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1564-69-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2068-80-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2068-90-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2068-82-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2220-36-0x0000000074090000-0x000000007477E000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-1-0x0000000000B20000-0x0000000000C44000-memory.dmp

    Filesize

    1.1MB

  • memory/2220-2-0x00000000004F0000-0x000000000050A000-memory.dmp

    Filesize

    104KB

  • memory/2220-3-0x0000000074090000-0x000000007477E000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-4-0x0000000000390000-0x00000000003A0000-memory.dmp

    Filesize

    64KB

  • memory/2220-5-0x00000000051C0000-0x0000000005280000-memory.dmp

    Filesize

    768KB

  • memory/2220-0-0x000000007409E000-0x000000007409F000-memory.dmp

    Filesize

    4KB

  • memory/2484-40-0x0000000001030000-0x0000000001154000-memory.dmp

    Filesize

    1.1MB

  • memory/2892-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-15-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2892-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-13-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-27-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-23-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-21-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2892-19-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB