Analysis

  • max time kernel
    148s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2024 07:12

General

  • Target

    BankFundTransfer-589237.scr.exe

  • Size

    1.2MB

  • MD5

    552044ce92b78bf4b68d242c2c380afe

  • SHA1

    2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

  • SHA256

    cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

  • SHA512

    4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

  • SSDEEP

    24576:6YdgfvzmIzxWOwxzCJYC3PPoKb0Eci5ihjJVxw9bYOd+8:qzmmWXRCaePPjb0Eci5ih7xw9bYI

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.226:9285

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    AppUpdate

  • 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-VCJ8ZS

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    AppUpdate

  • 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 4 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 4 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 12 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 62 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BankFundTransfer-589237.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\BankFundTransfer-589237.scr.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2656
    • 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\BankFundTransfer-589237.scr.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2720
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2104
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB922.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2652
    • C:\Users\Admin\AppData\Local\Temp\BankFundTransfer-589237.scr.exe
      "C:\Users\Admin\AppData\Local\Temp\BankFundTransfer-589237.scr.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1576
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2680
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\AppUpdate\remcos.exe"
          4⤵
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2500
          • C:\ProgramData\AppUpdate\remcos.exe
            C:\ProgramData\AppUpdate\remcos.exe
            5⤵
            • 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:2520
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\ProgramData\AppUpdate\remcos.exe"
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1908
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1880
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp20F8.tmp"
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1696
            • C:\ProgramData\AppUpdate\remcos.exe
              "C:\ProgramData\AppUpdate\remcos.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • System Location Discovery: System Language Discovery
              PID:2876

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\AppUpdate\remcos.exe

    Filesize

    1.2MB

    MD5

    552044ce92b78bf4b68d242c2c380afe

    SHA1

    2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

    SHA256

    cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

    SHA512

    4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

  • C:\Users\Admin\AppData\Local\Temp\install.vbs

    Filesize

    392B

    MD5

    046708368578d720d91fb9ceecec742e

    SHA1

    1dc732f67f48a1d5694f4cf14a8d279dbd1d6ee6

    SHA256

    04f4edc28e97a16f93cf7acac864aba17cc467282550ae61baac719262be6f5e

    SHA512

    9106f645ee74c9e061fcb396a00d706512d41054a356125f26a10d42390d8f0d3ea3dd785393bf5de358b62464ec3c0f7d2e27411e87bb408581f820c427e7f0

  • C:\Users\Admin\AppData\Local\Temp\tmpB922.tmp

    Filesize

    1KB

    MD5

    5139190d29d6b1997937a5ba914671ba

    SHA1

    994cd6d2f45bb16c5c5158d425fc0fbc63a7c474

    SHA256

    62e87d45a6ff5fc0c43fc9ab0fdbc08d861f3b1c33f435f93575e2feef3fc313

    SHA512

    6290bf76132d43f8e51faa1d59920cdb1bc68b0940370409914d3af17a1c8fb396a0e26ecbe8a68878de84eac2222dfa338eb24822587ed85cb954d5e4af4779

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\NNJT5L7PFNUSIVY6ZFFF.temp

    Filesize

    7KB

    MD5

    db2f6798e3a86c85eabe29d46199784d

    SHA1

    5a2b88c34c1ff10711e5e3caba00228bd50dfe99

    SHA256

    b8de2c698439a6a5edd529973113b44f5d34948d8e8cce3613667b0b86f340b9

    SHA512

    738f3ce0d2cc6b8bf4944bf07ef9c07f2e207f48f5a2dcdaef29ddb1c4a9390be411c6919517121bf2d37be5e9ead3b25e1f8d04034b08e85ee0f22f480107df

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

    Filesize

    7KB

    MD5

    3bb138883e72e24a0004026be14be846

    SHA1

    aed59a47ef04f6ecd511d9620fe9ef25716364ac

    SHA256

    e9d1ca9a3dae219ed08da5fcab88bb6b1acfbb4fbfcf973b77c17eb3b7795fee

    SHA512

    8153e35505401dbcf13a6c2fcd1a64641debc90f3705895f1df06c31388cc1e1f842cd2ecde4da1fcce5121237dacd14da0641f9b1e9ac025f75af8cf7aaf450

  • memory/1576-19-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-27-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-21-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1576-36-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-37-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-33-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-31-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-29-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-25-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1576-23-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2520-48-0x0000000000260000-0x0000000000272000-memory.dmp

    Filesize

    72KB

  • memory/2520-47-0x0000000000E80000-0x0000000000FB0000-memory.dmp

    Filesize

    1.2MB

  • memory/2656-2-0x0000000074E80000-0x000000007556E000-memory.dmp

    Filesize

    6.9MB

  • memory/2656-1-0x0000000000F30000-0x0000000001060000-memory.dmp

    Filesize

    1.2MB

  • memory/2656-42-0x0000000074E80000-0x000000007556E000-memory.dmp

    Filesize

    6.9MB

  • memory/2656-3-0x0000000000410000-0x0000000000422000-memory.dmp

    Filesize

    72KB

  • memory/2656-6-0x0000000005270000-0x0000000005330000-memory.dmp

    Filesize

    768KB

  • memory/2656-4-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

    Filesize

    4KB

  • memory/2656-5-0x0000000074E80000-0x000000007556E000-memory.dmp

    Filesize

    6.9MB

  • memory/2656-0-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

    Filesize

    4KB

  • memory/2876-75-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-82-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-76-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-72-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2876-83-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-84-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-85-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-89-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-88-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-91-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-90-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-93-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2876-92-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB