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Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/12/2024, 02:26

General

  • Target

    7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b.exe

  • Size

    832KB

  • MD5

    f443c222255e35ee6dd0e194360c23ce

  • SHA1

    a8c84df31a575ab84e6255b89351ce877c9619c8

  • SHA256

    7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b

  • SHA512

    ca58f238cf2599fabd5c34faa34630e2f158cc87a612ad1783a5982b7c835bf7941ee68699dc3e9486f01b578caf6ac53a15f22b92398aa32c8d8742d202fe53

  • SSDEEP

    12288:OeB1Nd/75yaHV5epXyU8+uggQdbGqDEEiHczNGNB4aEPvl1bDDdOJVe3e+mraL:OW1D5yeV5eNyB7QtHDE3HcE0DA8mraL

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:3678

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-MKYDDH

  • 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.

  • Remcos family
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • 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 1 IoCs

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

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Uses the VBS compiler for execution 1 TTPs
  • Windows security modification 2 TTPs 3 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

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

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • 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 24 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b.exe
    "C:\Users\Admin\AppData\Local\Temp\7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1668
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\7053c8d9983dc949e5d559ba1b006b8ba9c059a23e06cd87c857c3d04201381b.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2444
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5104
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\mbwsjprcyhqmgkgbdyeovzhenkausnzjzd"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1728
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\ovkkkhc"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:984
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\yxpdksmxax"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4092

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    f7a7774d539876e8acee49378e580434

    SHA1

    b4d3116448179163db50b37ffbfc438a2fbc1619

    SHA256

    1cf0aa9b8e67ba22b9a3d568e108ea0f410bb1b2a86817e09eb3870c006e490d

    SHA512

    66bdcd4aea0719eff21819802975ac4c38794c3ff3f90ae9e16bf304d50b8d7236debf8a159e38d8f83cb501e0d8556183d7d2632391f53ceaf817af4caa757e

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3bky3xrr.hly.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    c3c5f2de99b7486f697634681e21bab0

    SHA1

    00f90d495c0b2b63fde6532e033fdd2ade25633d

    SHA256

    76296dc29f718988107d35d0e0b835c2bf3fc7405e79e5121aa4738f82b51582

    SHA512

    7c60ffdc093de30e793d20768877f2f586bee3e948767871f9a1139252d5d2f593ba6f88ce0ed5f72c79faddb26186792df0581e4b6c84d405c44d9d12f951b8

  • memory/984-39-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/984-34-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/984-40-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1668-48-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/1668-2-0x000002233DDC0000-0x000002233DE90000-memory.dmp

    Filesize

    832KB

  • memory/1668-3-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/1668-1-0x0000022323960000-0x0000022323A34000-memory.dmp

    Filesize

    848KB

  • memory/1668-0-0x00007FFCFBDB3000-0x00007FFCFBDB5000-memory.dmp

    Filesize

    8KB

  • memory/1728-33-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1728-37-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1728-41-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2444-18-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/2444-6-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/2444-24-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/2444-32-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

    Filesize

    10.8MB

  • memory/2444-13-0x000001E0511C0000-0x000001E0511E2000-memory.dmp

    Filesize

    136KB

  • memory/4092-38-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4092-42-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4092-43-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/5104-19-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-5-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-29-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-26-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-27-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-25-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-23-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-22-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-36-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-12-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-54-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/5104-53-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/5104-50-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/5104-28-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-55-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-58-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-61-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-62-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-4-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-69-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-70-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-77-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-78-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-85-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-86-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-93-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/5104-94-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB