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Analysis

  • max time kernel
    149s
  • max time network
    148s
  • 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, 17:43

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:3012
    • 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:3252
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3718.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3732
    • 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:5116
      • 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:3704
        • 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:4480
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mWrixkEbVc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA88F.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2300
        • 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:3612

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    932ce2de8382e8e54944e2362f826a55

    SHA1

    b75e6ab13ec2704eea2f4ab5c1c23c6e12985659

    SHA256

    ba2c25bdb4b890de04913768cab5aab22aa71bf0a38dcca04153d1c87b127fd9

    SHA512

    244d20455fa819bd3bbde832e610499dc6f0e040d90aabb408ade6e5ebd20f0c95fbe86d88ca16a3b2f4eebe90717c113a483f9c3ae7ff0b0bbfa5d56a8525d2

  • 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

    66cbf475da35a029cb5dc0a826595fef

    SHA1

    74e5d7026ece5c8f86d391c17681d95a791354fb

    SHA256

    a89211bb8616394375c6917ec96666ec72448dc5e587b80426fedc729909368a

    SHA512

    18d5df7b7604826dec5f2e60f49a56589bdae69f755cdeb76e88859e928adf669878ecd110fb817a065da5c76ec2f011a71d7ea7bd0828eeb920679e458e0d56

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u2dr2gkm.b54.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp3718.tmp

    Filesize

    1KB

    MD5

    0fbdf72711941bb705c89e08669a7f3d

    SHA1

    44cda8198a162bdd348a3bd047326454cb40fe09

    SHA256

    ec8d02344844947db5b5e4a336418a821ed880ee30bf85a476f040398c55fb51

    SHA512

    7e350ee233c55919c259c4321c17fc5f09538337ab47f26497ce869b4ef156b2d213c5fa9d88d221b262b9821c957849680b9350683f39517b39fa11ed19d940

  • memory/3012-4-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3012-7-0x0000000074D0E000-0x0000000074D0F000-memory.dmp

    Filesize

    4KB

  • memory/3012-8-0x0000000005660000-0x0000000005672000-memory.dmp

    Filesize

    72KB

  • memory/3012-9-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3012-10-0x00000000078E0000-0x00000000079A4000-memory.dmp

    Filesize

    784KB

  • memory/3012-6-0x0000000005460000-0x00000000054FC000-memory.dmp

    Filesize

    624KB

  • memory/3012-5-0x0000000005240000-0x000000000524A000-memory.dmp

    Filesize

    40KB

  • memory/3012-34-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3012-0-0x0000000074D0E000-0x0000000074D0F000-memory.dmp

    Filesize

    4KB

  • memory/3012-3-0x0000000005030000-0x00000000050C2000-memory.dmp

    Filesize

    584KB

  • memory/3012-2-0x00000000056D0000-0x0000000005C74000-memory.dmp

    Filesize

    5.6MB

  • memory/3012-1-0x00000000006B0000-0x000000000079A000-memory.dmp

    Filesize

    936KB

  • memory/3252-53-0x00000000060A0000-0x00000000060D2000-memory.dmp

    Filesize

    200KB

  • memory/3252-73-0x0000000007110000-0x000000000712A000-memory.dmp

    Filesize

    104KB

  • memory/3252-32-0x0000000004E10000-0x0000000004E76000-memory.dmp

    Filesize

    408KB

  • memory/3252-16-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3252-15-0x0000000002170000-0x00000000021A6000-memory.dmp

    Filesize

    216KB

  • memory/3252-17-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3252-21-0x0000000004B00000-0x0000000004B22000-memory.dmp

    Filesize

    136KB

  • memory/3252-49-0x00000000054F0000-0x0000000005844000-memory.dmp

    Filesize

    3.3MB

  • memory/3252-77-0x0000000074D00000-0x00000000754B0000-memory.dmp

    Filesize

    7.7MB

  • memory/3252-74-0x00000000070F0000-0x00000000070F8000-memory.dmp

    Filesize

    32KB

  • memory/3252-51-0x0000000005AA0000-0x0000000005ABE000-memory.dmp

    Filesize

    120KB

  • memory/3252-52-0x0000000006010000-0x000000000605C000-memory.dmp

    Filesize

    304KB

  • memory/3252-19-0x0000000004EC0000-0x00000000054E8000-memory.dmp

    Filesize

    6.2MB

  • memory/3252-54-0x0000000072400000-0x000000007244C000-memory.dmp

    Filesize

    304KB

  • memory/3252-64-0x0000000005FF0000-0x000000000600E000-memory.dmp

    Filesize

    120KB

  • memory/3252-65-0x0000000006CA0000-0x0000000006D43000-memory.dmp

    Filesize

    652KB

  • memory/3252-66-0x0000000007410000-0x0000000007A8A000-memory.dmp

    Filesize

    6.5MB

  • memory/3252-67-0x0000000006DD0000-0x0000000006DEA000-memory.dmp

    Filesize

    104KB

  • memory/3252-68-0x0000000006E40000-0x0000000006E4A000-memory.dmp

    Filesize

    40KB

  • memory/3252-69-0x0000000007050000-0x00000000070E6000-memory.dmp

    Filesize

    600KB

  • memory/3252-70-0x0000000006FD0000-0x0000000006FE1000-memory.dmp

    Filesize

    68KB

  • memory/3252-71-0x0000000007000000-0x000000000700E000-memory.dmp

    Filesize

    56KB

  • memory/3252-72-0x0000000007010000-0x0000000007024000-memory.dmp

    Filesize

    80KB

  • memory/3252-30-0x0000000004DA0000-0x0000000004E06000-memory.dmp

    Filesize

    408KB

  • memory/3612-124-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-130-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-143-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-142-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-96-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-137-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3612-94-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3704-78-0x0000000005090000-0x00000000050A2000-memory.dmp

    Filesize

    72KB

  • memory/4480-105-0x00000000714F0000-0x000000007153C000-memory.dmp

    Filesize

    304KB

  • memory/4480-115-0x0000000007800000-0x00000000078A3000-memory.dmp

    Filesize

    652KB

  • memory/4480-104-0x00000000066A0000-0x00000000066EC000-memory.dmp

    Filesize

    304KB

  • memory/4480-116-0x0000000007B50000-0x0000000007B61000-memory.dmp

    Filesize

    68KB

  • memory/4480-117-0x0000000007B90000-0x0000000007BA4000-memory.dmp

    Filesize

    80KB

  • memory/4480-83-0x0000000005F70000-0x00000000062C4000-memory.dmp

    Filesize

    3.3MB

  • memory/5116-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/5116-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/5116-50-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/5116-33-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/5116-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB