Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-11-2024 03:46

General

  • Target

    Bank Fund Transfer-589237.scr

  • 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.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 2 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.

  • Modifies registry class 1 IoCs
  • 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 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr
    "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr" /S
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3232
    • 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\Bank Fund Transfer-589237.scr"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1820
    • 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:1780
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp887.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3224
    • C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr
      "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1896
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1576
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\AppUpdate\remcos.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4232
          • C:\ProgramData\AppUpdate\remcos.exe
            C:\ProgramData\AppUpdate\remcos.exe
            5⤵
            • Checks computer location settings
            • 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:688
            • 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:768
            • 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:4752
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7A4C.tmp"
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:3452
            • 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:3404

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\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    3d086a433708053f9bf9523e1d87a4e8

    SHA1

    b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

    SHA256

    6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

    SHA512

    931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

    Filesize

    18KB

    MD5

    afeedea80aba2f5d5a6807f18663b41e

    SHA1

    0e736963cbdecd83a3f4cbef8e85fb6be8c78019

    SHA256

    a32cc037aac1436d2806914a0dd558a33457d0a973f8a70aa77f06fb95554027

    SHA512

    f9c9d945c3ee79324cb88ff1782f268a9b3e390cd669df84afe9da605d69766e6bc9a2f0d15d7726e43491f8b9db696314c9ff418d495b599b44528a56c801f1

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

    Filesize

    18KB

    MD5

    05fd59af7ef0255eac9c922176de11fe

    SHA1

    1ccb29abe181c07c8df40383744c2dd08a3a28b1

    SHA256

    9cd29bfdbfd55577b789f8968d60e3763be7fb3c40f6054008bc15e019e631c6

    SHA512

    469fc628946926b26e9319761143ad029432041b08fa57401800c027a80657db2d09eb6f27933df44fb9d55d61e7c2ee894efd342af014812a6be6b417abda3c

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tauj0ypx.v13.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    392B

    MD5

    046708368578d720d91fb9ceecec742e

    SHA1

    1dc732f67f48a1d5694f4cf14a8d279dbd1d6ee6

    SHA256

    04f4edc28e97a16f93cf7acac864aba17cc467282550ae61baac719262be6f5e

    SHA512

    9106f645ee74c9e061fcb396a00d706512d41054a356125f26a10d42390d8f0d3ea3dd785393bf5de358b62464ec3c0f7d2e27411e87bb408581f820c427e7f0

  • C:\Users\Admin\AppData\Local\Temp\tmp887.tmp

    Filesize

    1KB

    MD5

    77b5aaf1606a79a7f6047b30d2e46aec

    SHA1

    eac7a9c50f3d726d7f0e2c26e41e501d8f392c05

    SHA256

    d4ef4f97983847f15891554c3d3e971a2be8d0903e30d515f38cc3d0ef5a17ac

    SHA512

    d206979c95afc3657b0ae4e4f83147f530bdbdf58fc867125fce112a43f502ab229b8baffb5e3c05ef05af53af4bc8c5be4839e2a0fb9fc0374571f7bdc89d93

  • memory/688-99-0x0000000005090000-0x00000000050A2000-memory.dmp

    Filesize

    72KB

  • memory/768-154-0x00000000077D0000-0x00000000077E4000-memory.dmp

    Filesize

    80KB

  • memory/768-140-0x0000000073780000-0x00000000737CC000-memory.dmp

    Filesize

    304KB

  • memory/768-128-0x00000000066B0000-0x00000000066FC000-memory.dmp

    Filesize

    304KB

  • memory/1780-84-0x0000000007970000-0x000000000798A000-memory.dmp

    Filesize

    104KB

  • memory/1780-44-0x0000000006140000-0x0000000006494000-memory.dmp

    Filesize

    3.3MB

  • memory/1780-83-0x0000000007FB0000-0x000000000862A000-memory.dmp

    Filesize

    6.5MB

  • memory/1780-54-0x0000000006640000-0x000000000665E000-memory.dmp

    Filesize

    120KB

  • memory/1780-88-0x0000000007BA0000-0x0000000007BAE000-memory.dmp

    Filesize

    56KB

  • memory/1780-19-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1780-29-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1780-61-0x0000000075560000-0x00000000755AC000-memory.dmp

    Filesize

    304KB

  • memory/1780-71-0x0000000007610000-0x000000000762E000-memory.dmp

    Filesize

    120KB

  • memory/1780-87-0x0000000007B70000-0x0000000007B81000-memory.dmp

    Filesize

    68KB

  • memory/1780-72-0x0000000007640000-0x00000000076E3000-memory.dmp

    Filesize

    652KB

  • memory/1780-46-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1780-90-0x0000000007CB0000-0x0000000007CCA000-memory.dmp

    Filesize

    104KB

  • memory/1780-60-0x0000000006C20000-0x0000000006C52000-memory.dmp

    Filesize

    200KB

  • memory/1780-91-0x0000000007C90000-0x0000000007C98000-memory.dmp

    Filesize

    32KB

  • memory/1780-55-0x00000000068A0000-0x00000000068EC000-memory.dmp

    Filesize

    304KB

  • memory/1780-98-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1820-28-0x0000000005960000-0x00000000059C6000-memory.dmp

    Filesize

    408KB

  • memory/1820-97-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1820-21-0x0000000005750000-0x0000000005772000-memory.dmp

    Filesize

    136KB

  • memory/1820-22-0x00000000058F0000-0x0000000005956000-memory.dmp

    Filesize

    408KB

  • memory/1820-89-0x0000000007B80000-0x0000000007B94000-memory.dmp

    Filesize

    80KB

  • memory/1820-15-0x0000000002D10000-0x0000000002D46000-memory.dmp

    Filesize

    216KB

  • memory/1820-73-0x0000000075560000-0x00000000755AC000-memory.dmp

    Filesize

    304KB

  • memory/1820-43-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1820-16-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1820-18-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/1820-17-0x0000000005A90000-0x00000000060B8000-memory.dmp

    Filesize

    6.2MB

  • memory/1820-85-0x00000000079B0000-0x00000000079BA000-memory.dmp

    Filesize

    40KB

  • memory/1820-86-0x0000000007BC0000-0x0000000007C56000-memory.dmp

    Filesize

    600KB

  • memory/1896-48-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/1896-45-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3232-5-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/3232-0-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

    Filesize

    4KB

  • memory/3232-3-0x00000000054B0000-0x0000000005542000-memory.dmp

    Filesize

    584KB

  • memory/3232-8-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

    Filesize

    4KB

  • memory/3232-10-0x0000000006BE0000-0x0000000006CA0000-memory.dmp

    Filesize

    768KB

  • memory/3232-6-0x0000000005780000-0x000000000581C000-memory.dmp

    Filesize

    624KB

  • memory/3232-53-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/3232-4-0x0000000005640000-0x000000000564A000-memory.dmp

    Filesize

    40KB

  • memory/3232-1-0x0000000000970000-0x0000000000AA0000-memory.dmp

    Filesize

    1.2MB

  • memory/3232-2-0x00000000059C0000-0x0000000005F64000-memory.dmp

    Filesize

    5.6MB

  • memory/3232-7-0x0000000005670000-0x0000000005682000-memory.dmp

    Filesize

    72KB

  • memory/3232-9-0x0000000074CB0000-0x0000000075460000-memory.dmp

    Filesize

    7.7MB

  • memory/3404-159-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-162-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-165-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-115-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-114-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-151-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-152-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-153-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-116-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-164-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-163-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-160-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3404-161-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4752-129-0x0000000073780000-0x00000000737CC000-memory.dmp

    Filesize

    304KB

  • memory/4752-139-0x0000000006DC0000-0x0000000006E63000-memory.dmp

    Filesize

    652KB

  • memory/4752-107-0x0000000005570000-0x00000000058C4000-memory.dmp

    Filesize

    3.3MB

  • memory/4752-150-0x0000000007110000-0x0000000007121000-memory.dmp

    Filesize

    68KB