Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2024 03:01

General

  • Target

    RFQ-00948-STELLION-878378.exe

  • Size

    1.1MB

  • MD5

    7d78937ebc3648958437741df13eec52

  • SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

  • SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

  • SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • SSDEEP

    24576:PYoOciJwQYaoRuivChV3DSwctuoqBMY9zVZEueHTf:PsbwQIRssqBMWVZEu

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 4 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 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.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:2176
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1700
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDED7.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2024
    • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1144
      • 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:4316
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3048
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3AA3.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1852
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:1480
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:4212
        • 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:3568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    0ee93e247f9993876cab1b4ff5e43779

    SHA1

    ea721a66427fd3bf795097ddc392cb58f578349a

    SHA256

    e10acc7bc7f56d52edc2f079266439ffc0318b6d25fa1406f5c931a3e5a8cb58

    SHA512

    1888d9334e817129aec03e121b94a10ea25c0e25b152441700d56f942cf901e2cf07c3fe1e7a25cde3805c079056b4f7db0d3db2730df0f5f94e38a6921708dc

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    1.1MB

    MD5

    7d78937ebc3648958437741df13eec52

    SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

    SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

    SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • 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

    ba16e5be2ca55b93f567b8f457a03eae

    SHA1

    58e56fab94fc6ea853ff55f95678d07b8ce49529

    SHA256

    3cddb3fe2078f991069218f886a09993541313059b18381804ebd6f637456696

    SHA512

    bc6d555d37531dca87917b99e2403558c0c7053f3cbcb470c4dd5575a929fedc0a0b42c79a1d6776b6ca61bdefe4d547e100e7c30096e889e9e705276282fa83

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_a454tunq.m2k.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpDED7.tmp

    Filesize

    1KB

    MD5

    7efba3391c9d516ed8f68fc2f833842e

    SHA1

    52a2ce8472a745ba8db164b5eb24e0b159c5e842

    SHA256

    b965a569e857df5c573cb11f737fd3c3e9e48dd4bdf9fb640ccb4476b0b7a16a

    SHA512

    c9219c35f58886f449925e1e714e962dc9c19bd9b6e8683c2ccba2d4e243a512978a6bc002e8d564cddce69a06bd272b54a60f0f929d8ee797e2174ce9f72bfe

  • memory/1144-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1144-50-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1144-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1144-36-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1144-34-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1700-33-0x0000000006040000-0x0000000006394000-memory.dmp

    Filesize

    3.3MB

  • memory/1700-68-0x0000000007950000-0x000000000796A000-memory.dmp

    Filesize

    104KB

  • memory/1700-17-0x00000000056D0000-0x0000000005CF8000-memory.dmp

    Filesize

    6.2MB

  • memory/1700-18-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/1700-15-0x0000000005060000-0x0000000005096000-memory.dmp

    Filesize

    216KB

  • memory/1700-21-0x0000000005680000-0x00000000056A2000-memory.dmp

    Filesize

    136KB

  • memory/1700-20-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/1700-22-0x0000000005DB0000-0x0000000005E16000-memory.dmp

    Filesize

    408KB

  • memory/1700-23-0x0000000005ED0000-0x0000000005F36000-memory.dmp

    Filesize

    408KB

  • memory/1700-78-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/1700-75-0x0000000007C70000-0x0000000007C78000-memory.dmp

    Filesize

    32KB

  • memory/1700-74-0x0000000007C90000-0x0000000007CAA000-memory.dmp

    Filesize

    104KB

  • memory/1700-73-0x0000000007B90000-0x0000000007BA4000-memory.dmp

    Filesize

    80KB

  • memory/1700-16-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/1700-72-0x0000000007B80000-0x0000000007B8E000-memory.dmp

    Filesize

    56KB

  • memory/1700-71-0x0000000007B50000-0x0000000007B61000-memory.dmp

    Filesize

    68KB

  • memory/1700-52-0x0000000006610000-0x000000000662E000-memory.dmp

    Filesize

    120KB

  • memory/1700-53-0x0000000006BB0000-0x0000000006BFC000-memory.dmp

    Filesize

    304KB

  • memory/1700-70-0x0000000007BD0000-0x0000000007C66000-memory.dmp

    Filesize

    600KB

  • memory/1700-69-0x00000000079C0000-0x00000000079CA000-memory.dmp

    Filesize

    40KB

  • memory/1700-54-0x0000000006C00000-0x0000000006C32000-memory.dmp

    Filesize

    200KB

  • memory/1700-55-0x0000000071490000-0x00000000714DC000-memory.dmp

    Filesize

    304KB

  • memory/1700-65-0x00000000075F0000-0x000000000760E000-memory.dmp

    Filesize

    120KB

  • memory/1700-66-0x0000000007610000-0x00000000076B3000-memory.dmp

    Filesize

    652KB

  • memory/1700-67-0x0000000007F90000-0x000000000860A000-memory.dmp

    Filesize

    6.5MB

  • memory/2176-6-0x0000000005300000-0x000000000531C000-memory.dmp

    Filesize

    112KB

  • memory/2176-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

    Filesize

    4KB

  • memory/2176-4-0x0000000005210000-0x000000000521A000-memory.dmp

    Filesize

    40KB

  • memory/2176-51-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/2176-5-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/2176-7-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

    Filesize

    4KB

  • memory/2176-8-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

  • memory/2176-9-0x0000000007EB0000-0x0000000007F74000-memory.dmp

    Filesize

    784KB

  • memory/2176-10-0x000000000A610000-0x000000000A6AC000-memory.dmp

    Filesize

    624KB

  • memory/2176-3-0x0000000005060000-0x00000000050F2000-memory.dmp

    Filesize

    584KB

  • memory/2176-1-0x0000000000690000-0x00000000007AC000-memory.dmp

    Filesize

    1.1MB

  • memory/2176-2-0x00000000057F0000-0x0000000005D94000-memory.dmp

    Filesize

    5.6MB

  • memory/3048-95-0x00000000056C0000-0x0000000005A14000-memory.dmp

    Filesize

    3.3MB

  • memory/3048-118-0x0000000007240000-0x0000000007251000-memory.dmp

    Filesize

    68KB

  • memory/3048-119-0x0000000007280000-0x0000000007294000-memory.dmp

    Filesize

    80KB

  • memory/3048-117-0x0000000006F90000-0x0000000007033000-memory.dmp

    Filesize

    652KB

  • memory/3048-106-0x0000000005DE0000-0x0000000005E2C000-memory.dmp

    Filesize

    304KB

  • memory/3048-107-0x0000000071550000-0x000000007159C000-memory.dmp

    Filesize

    304KB

  • memory/3568-93-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-88-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-86-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-92-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-132-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-138-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-144-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3568-145-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB