Analysis

  • max time kernel
    149s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/11/2024, 04:12

General

  • Target

    e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe

  • Size

    959KB

  • MD5

    b074e2458b987efec69536a58316d5a6

  • SHA1

    ffebefa18462d47fc8b82abc9069c9fdd6079da9

  • SHA256

    e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32

  • SHA512

    1f76d7ae0558962781b913b765ff6b92b5f03aa511c6be2f206ff17c361052d4b34a37d46e49447a0860586474c3bc656ed34d9d094b605d06a6ebfbcc0a2422

  • SSDEEP

    24576:YQm35eXO2xQ7nEP9FsGu0ftQbg665Xp3GuD+XjK:jej2ynElFsGu0fsgD5XpTqXj

Malware Config

Extracted

Family

remcos

Botnet

Document

C2

45.138.48.25:3333

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    WinUpdate.exe

  • copy_folder

    WinUpdate

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %Temp%

  • keylog_crypt

    false

  • keylog_file

    WinUpdat.dat

  • keylog_flag

    false

  • keylog_folder

    WinUpdat

  • mouse_option

    false

  • mutex

    Rmc-E10MWO

  • 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
  • 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.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe
    "C:\Users\Admin\AppData\Local\Temp\e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2808
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4976
    • C:\Users\Admin\AppData\Local\Temp\e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe
      "C:\Users\Admin\AppData\Local\Temp\e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1280
      • C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
        "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4092
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5028
        • C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
          "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetWindowsHookEx
          PID:4468

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    1747bb55250437cee3be6aafe5bd338b

    SHA1

    d89aa4f3e489c971188b09b3bb75736a98c79fdb

    SHA256

    aa5933d3a4816cbbe73cb759cf6dcb97dcc0d20b4159d0fb01ef51471f1c31e1

    SHA512

    4fc4c595c988c7d2ac10400330a5ee0dce67322d7d0bea189c11d7d8f358254336e5593b271c7f63d89fa3f2e953f125f4d121c2a1cdd211aec0fde492206001

  • C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe

    Filesize

    959KB

    MD5

    b074e2458b987efec69536a58316d5a6

    SHA1

    ffebefa18462d47fc8b82abc9069c9fdd6079da9

    SHA256

    e744e0aa890a2d9b5e6eed8403cb16f6098baee4a0529b1fabc0644ee4ba6b32

    SHA512

    1f76d7ae0558962781b913b765ff6b92b5f03aa511c6be2f206ff17c361052d4b34a37d46e49447a0860586474c3bc656ed34d9d094b605d06a6ebfbcc0a2422

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m3lagblq.4kk.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1280-31-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1280-16-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1280-14-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1280-12-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1280-11-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2808-10-0x0000000006B30000-0x0000000006BF4000-memory.dmp

    Filesize

    784KB

  • memory/2808-9-0x0000000074770000-0x0000000074F20000-memory.dmp

    Filesize

    7.7MB

  • memory/2808-8-0x000000007477E000-0x000000007477F000-memory.dmp

    Filesize

    4KB

  • memory/2808-7-0x0000000005970000-0x000000000598C000-memory.dmp

    Filesize

    112KB

  • memory/2808-6-0x0000000005830000-0x00000000058CC000-memory.dmp

    Filesize

    624KB

  • memory/2808-4-0x0000000074770000-0x0000000074F20000-memory.dmp

    Filesize

    7.7MB

  • memory/2808-17-0x0000000074770000-0x0000000074F20000-memory.dmp

    Filesize

    7.7MB

  • memory/2808-5-0x0000000005750000-0x000000000575A000-memory.dmp

    Filesize

    40KB

  • memory/2808-3-0x00000000055A0000-0x0000000005632000-memory.dmp

    Filesize

    584KB

  • memory/2808-2-0x0000000005C10000-0x00000000061B4000-memory.dmp

    Filesize

    5.6MB

  • memory/2808-0-0x000000007477E000-0x000000007477F000-memory.dmp

    Filesize

    4KB

  • memory/2808-1-0x0000000000BF0000-0x0000000000CE6000-memory.dmp

    Filesize

    984KB

  • memory/4468-76-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-81-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-117-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-116-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-114-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-115-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-113-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-112-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-109-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-110-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-75-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4468-79-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4976-72-0x0000000074780000-0x0000000074F30000-memory.dmp

    Filesize

    7.7MB

  • memory/4976-49-0x0000000072B00000-0x0000000072B4C000-memory.dmp

    Filesize

    304KB

  • memory/4976-63-0x0000000007190000-0x000000000719A000-memory.dmp

    Filesize

    40KB

  • memory/4976-64-0x0000000007390000-0x0000000007426000-memory.dmp

    Filesize

    600KB

  • memory/4976-65-0x0000000007310000-0x0000000007321000-memory.dmp

    Filesize

    68KB

  • memory/4976-66-0x0000000007340000-0x000000000734E000-memory.dmp

    Filesize

    56KB

  • memory/4976-67-0x0000000007350000-0x0000000007364000-memory.dmp

    Filesize

    80KB

  • memory/4976-68-0x0000000007450000-0x000000000746A000-memory.dmp

    Filesize

    104KB

  • memory/4976-69-0x0000000007430000-0x0000000007438000-memory.dmp

    Filesize

    32KB

  • memory/4976-35-0x0000000004E60000-0x0000000004EC6000-memory.dmp

    Filesize

    408KB

  • memory/4976-61-0x0000000007760000-0x0000000007DDA000-memory.dmp

    Filesize

    6.5MB

  • memory/4976-60-0x0000000006DF0000-0x0000000006E93000-memory.dmp

    Filesize

    652KB

  • memory/4976-27-0x0000000074780000-0x0000000074F30000-memory.dmp

    Filesize

    7.7MB

  • memory/4976-59-0x0000000006390000-0x00000000063AE000-memory.dmp

    Filesize

    120KB

  • memory/4976-26-0x00000000024E0000-0x0000000002516000-memory.dmp

    Filesize

    216KB

  • memory/4976-34-0x0000000004DF0000-0x0000000004E56000-memory.dmp

    Filesize

    408KB

  • memory/4976-18-0x000000007478E000-0x000000007478F000-memory.dmp

    Filesize

    4KB

  • memory/4976-33-0x0000000004D50000-0x0000000004D72000-memory.dmp

    Filesize

    136KB

  • memory/4976-36-0x00000000057A0000-0x0000000005AF4000-memory.dmp

    Filesize

    3.3MB

  • memory/4976-29-0x0000000005010000-0x0000000005638000-memory.dmp

    Filesize

    6.2MB

  • memory/4976-46-0x0000000005DF0000-0x0000000005E0E000-memory.dmp

    Filesize

    120KB

  • memory/4976-47-0x0000000005E80000-0x0000000005ECC000-memory.dmp

    Filesize

    304KB

  • memory/4976-62-0x0000000007110000-0x000000000712A000-memory.dmp

    Filesize

    104KB

  • memory/4976-48-0x00000000063C0000-0x00000000063F2000-memory.dmp

    Filesize

    200KB

  • memory/5028-107-0x0000000007C00000-0x0000000007C14000-memory.dmp

    Filesize

    80KB

  • memory/5028-106-0x0000000007BB0000-0x0000000007BC1000-memory.dmp

    Filesize

    68KB

  • memory/5028-105-0x0000000007910000-0x00000000079B3000-memory.dmp

    Filesize

    652KB

  • memory/5028-95-0x00000000710C0000-0x000000007110C000-memory.dmp

    Filesize

    304KB

  • memory/5028-94-0x00000000066A0000-0x00000000066EC000-memory.dmp

    Filesize

    304KB

  • memory/5028-92-0x0000000006140000-0x0000000006494000-memory.dmp

    Filesize

    3.3MB