Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-11-2024 03:04

General

  • Target

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe

  • Size

    908KB

  • MD5

    1cb86400147c835af58017f0474c5bcc

  • SHA1

    ac285cb623bf292341068dead954cfed9a1f8c81

  • SHA256

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61

  • SHA512

    ce74f39d092b13570f9387e5d43ced748dea9557e8887fc072694a2cf448b2c4cf741db3e76d551ebef3511b906ae1cbe0fe670f8968e51d1441982ec73b9b0c

  • SSDEEP

    24576:Nqho7Y33wd4D5N4UmVFruPkMKXbY31qKblvh:y1Hwd4FN4UoFqjKXboTp5

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

206.189.218.238:4782

206.189.218.238:2286

206.189.218.238:3363

206.189.218.238:3386

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NJK093

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • 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 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 8 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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe
    "C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe"
    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:3612
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mWrixkEbVc.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2860
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF608.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2780
    • C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe
      "C:\Users\Admin\AppData\Local\Temp\c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3352
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • 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:2088
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mWrixkEbVc.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1244
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp64B0.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2288
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:1620

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    d99c0044c530aae43ad8d1a5c93e98f2

    SHA1

    3c0522a577fbb54665b27cd42b43ad88e267f013

    SHA256

    da622c4d3e3059e05ccca93507ecf0d0d83a3ab8fbff77a7934ef4afd0ad72c5

    SHA512

    473ce5baca85547671ed5e4b5a062e8ffa02d6d7f32c82efe1a384b5d8cb8bbaf215228556d3f4736d0d2efed1fb258fc3141483788ddaa9f4293cd1ea58bf80

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    908KB

    MD5

    1cb86400147c835af58017f0474c5bcc

    SHA1

    ac285cb623bf292341068dead954cfed9a1f8c81

    SHA256

    c35b10fc350209ec356b48282d85b18d9b9ab5c0167dc88461297906602e3d61

    SHA512

    ce74f39d092b13570f9387e5d43ced748dea9557e8887fc072694a2cf448b2c4cf741db3e76d551ebef3511b906ae1cbe0fe670f8968e51d1441982ec73b9b0c

  • 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

    9ff067802f87292d2c511d6dc6c018c5

    SHA1

    01ccec0a04c8958c2a3ad539397fd16c89415a60

    SHA256

    ad5e23423e482907b2361b0f73120e92977ff7320e0c14b4120bf429f0a552e7

    SHA512

    10af18788af865346deaa66ce90f58edcbd392498c140c104516d14e70bfcd5d6f4a87b7bf46f9381a05e786a99f36290293abdc0bafebd6826918d121d74b43

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uny2uclk.j00.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpF608.tmp

    Filesize

    1KB

    MD5

    fe92aeb8e4ae345b48ea935a7e84cfa6

    SHA1

    2c8dfcdb21897688a25343c0b45d3b28d886ed55

    SHA256

    ed26f555f389f0279e13dddd7bf693be6930bbb1de0358c0f26096c6d2ac1b94

    SHA512

    544b613dacdda2658714ec520c62c37bb73d16c2846448ced0374ff9d89c08df6fd33e602091ae4d4c6dd8296d2afe3dca0dd2f1a8875da1d5058a6aa231dac0

  • memory/1244-106-0x00000000753B0000-0x00000000753FC000-memory.dmp

    Filesize

    304KB

  • memory/1244-118-0x0000000007370000-0x0000000007384000-memory.dmp

    Filesize

    80KB

  • memory/1244-117-0x0000000007320000-0x0000000007331000-memory.dmp

    Filesize

    68KB

  • memory/1244-116-0x00000000070A0000-0x0000000007143000-memory.dmp

    Filesize

    652KB

  • memory/1244-83-0x0000000005760000-0x0000000005AB4000-memory.dmp

    Filesize

    3.3MB

  • memory/1244-105-0x0000000005E30000-0x0000000005E7C000-memory.dmp

    Filesize

    304KB

  • memory/1620-137-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-131-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-88-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-96-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-102-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-124-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-143-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1620-144-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2088-79-0x0000000005240000-0x0000000005252000-memory.dmp

    Filesize

    72KB

  • memory/2860-20-0x0000000005010000-0x0000000005032000-memory.dmp

    Filesize

    136KB

  • memory/2860-75-0x0000000007720000-0x0000000007728000-memory.dmp

    Filesize

    32KB

  • memory/2860-15-0x00000000027B0000-0x00000000027E6000-memory.dmp

    Filesize

    216KB

  • memory/2860-39-0x0000000005A90000-0x0000000005DE4000-memory.dmp

    Filesize

    3.3MB

  • memory/2860-16-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/2860-19-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/2860-18-0x0000000005320000-0x0000000005948000-memory.dmp

    Filesize

    6.2MB

  • memory/2860-52-0x00000000060B0000-0x00000000060CE000-memory.dmp

    Filesize

    120KB

  • memory/2860-53-0x0000000006190000-0x00000000061DC000-memory.dmp

    Filesize

    304KB

  • memory/2860-55-0x0000000071280000-0x00000000712CC000-memory.dmp

    Filesize

    304KB

  • memory/2860-65-0x00000000066A0000-0x00000000066BE000-memory.dmp

    Filesize

    120KB

  • memory/2860-66-0x00000000072E0000-0x0000000007383000-memory.dmp

    Filesize

    652KB

  • memory/2860-54-0x00000000066C0000-0x00000000066F2000-memory.dmp

    Filesize

    200KB

  • memory/2860-68-0x0000000007400000-0x000000000741A000-memory.dmp

    Filesize

    104KB

  • memory/2860-67-0x0000000007A40000-0x00000000080BA000-memory.dmp

    Filesize

    6.5MB

  • memory/2860-69-0x0000000007470000-0x000000000747A000-memory.dmp

    Filesize

    40KB

  • memory/2860-70-0x0000000007680000-0x0000000007716000-memory.dmp

    Filesize

    600KB

  • memory/2860-71-0x0000000007600000-0x0000000007611000-memory.dmp

    Filesize

    68KB

  • memory/2860-72-0x0000000007630000-0x000000000763E000-memory.dmp

    Filesize

    56KB

  • memory/2860-73-0x0000000007640000-0x0000000007654000-memory.dmp

    Filesize

    80KB

  • memory/2860-74-0x0000000007740000-0x000000000775A000-memory.dmp

    Filesize

    104KB

  • memory/2860-22-0x0000000005220000-0x0000000005286000-memory.dmp

    Filesize

    408KB

  • memory/2860-78-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/2860-26-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/2860-21-0x00000000051B0000-0x0000000005216000-memory.dmp

    Filesize

    408KB

  • memory/3352-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3352-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3352-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3352-23-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3352-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-9-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/3612-48-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/3612-10-0x0000000007DD0000-0x0000000007E94000-memory.dmp

    Filesize

    784KB

  • memory/3612-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

    Filesize

    4KB

  • memory/3612-8-0x0000000005AB0000-0x0000000005AC2000-memory.dmp

    Filesize

    72KB

  • memory/3612-7-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

    Filesize

    4KB

  • memory/3612-6-0x0000000005930000-0x00000000059CC000-memory.dmp

    Filesize

    624KB

  • memory/3612-5-0x0000000074B20000-0x00000000752D0000-memory.dmp

    Filesize

    7.7MB

  • memory/3612-4-0x0000000005830000-0x000000000583A000-memory.dmp

    Filesize

    40KB

  • memory/3612-3-0x00000000056A0000-0x0000000005732000-memory.dmp

    Filesize

    584KB

  • memory/3612-2-0x0000000005BB0000-0x0000000006154000-memory.dmp

    Filesize

    5.6MB

  • memory/3612-1-0x0000000000CE0000-0x0000000000DCA000-memory.dmp

    Filesize

    936KB