Analysis

  • max time kernel
    152s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/02/2024, 07:39

General

  • Target

    RFQ#RE_Q1_2100006461_SUPPLY_ABB_MATTERIALS_Waagner_Biro_Bridge_pdf.exe

  • Size

    431KB

  • MD5

    2d445bd0fd5ca61eb05f2a293e7e9ecb

  • SHA1

    4728f6650d9658ad6c9db2a1c01c88b0bd9be712

  • SHA256

    c5bbe31a17d4365500acaf7bd2fbfc10f8a0867d650e12b24e22efa239cfdb3d

  • SHA512

    a8939d865005272c265e8c235153bffad905d6cb28aabd9599e707d2e09f55e3fc876d85a68da75947df4af5dde7b2d81916bf5d53e3319194fe2eb16414fd30

  • SSDEEP

    6144:znPdudwDMyZL5OCSAPcWOkhdeocqhf06ITkmSiwvcU7RJKbZJ2AI/6QRkmBWjjr5:znPdjQOFlfoi0TTv9U77KbZJ2AmrYVj

Malware Config

Extracted

Family

remcos

Botnet

3904

C2

72.11.158.94:1604

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    vsystems.exe

  • copy_folder

    vsystems

  • 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-BSR5QU

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ#RE_Q1_2100006461_SUPPLY_ABB_MATTERIALS_Waagner_Biro_Bridge_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ#RE_Q1_2100006461_SUPPLY_ABB_MATTERIALS_Waagner_Biro_Bridge_pdf.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4204
    • C:\Users\Admin\AppData\Local\Temp\RFQ#RE_Q1_2100006461_SUPPLY_ABB_MATTERIALS_Waagner_Biro_Bridge_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ#RE_Q1_2100006461_SUPPLY_ABB_MATTERIALS_Waagner_Biro_Bridge_pdf.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:2384
      • C:\ProgramData\vsystems\vsystems.exe
        "C:\ProgramData\vsystems\vsystems.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3996
        • C:\ProgramData\vsystems\vsystems.exe
          "C:\ProgramData\vsystems\vsystems.exe"
          4⤵
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          PID:2588

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\vsystems\vsystems.exe

          Filesize

          88KB

          MD5

          1e58da14d2ed23644fdb298a7d34d12d

          SHA1

          f9f9c1d3223ba88db9b21c59ea5445ba64996ab5

          SHA256

          4f6ae439cf324689d2838b7cac7e0514e1ada2e5978f97989c13a0023a277dd7

          SHA512

          4871d9480dcfe25d09e63831f5141583d0479217a39bd518119977f36d6fd35dc5d25691f0abfefba722808ece43892f10ed0669c821cf1ac72e4de05062c976

        • C:\ProgramData\vsystems\vsystems.exe

          Filesize

          431KB

          MD5

          2d445bd0fd5ca61eb05f2a293e7e9ecb

          SHA1

          4728f6650d9658ad6c9db2a1c01c88b0bd9be712

          SHA256

          c5bbe31a17d4365500acaf7bd2fbfc10f8a0867d650e12b24e22efa239cfdb3d

          SHA512

          a8939d865005272c265e8c235153bffad905d6cb28aabd9599e707d2e09f55e3fc876d85a68da75947df4af5dde7b2d81916bf5d53e3319194fe2eb16414fd30

        • C:\Users\Admin\AppData\Local\Temp\coralla\samisens\Restage\Frknerne\Brugerlicensaftalerne\Handlefrihedernes\Grdefrdig.Spi

          Filesize

          251KB

          MD5

          86f5b6261e755ad3f7c05b02e562a4cf

          SHA1

          89dc4b4ef749b2d71d63f9385b3b0ef5fac03499

          SHA256

          da8723c0c747b978c81ebe5d318a5a298bf85813392758323ab45999cd4db0a9

          SHA512

          a180dcb9c1b8acd35534ba7fc40953396bc686109b423901c4530783e4a03b63879f5f690aafe0ac5d1645e7c0f78885e794cd292185ac1d055d4a73eacb5c92

        • C:\Users\Admin\AppData\Local\Temp\nsq637.tmp\System.dll

          Filesize

          12KB

          MD5

          4add245d4ba34b04f213409bfe504c07

          SHA1

          ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

          SHA256

          9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

          SHA512

          1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

        • C:\Users\Admin\AppData\Roaming\Filformaters\Disponere189.exe

          Filesize

          431KB

          MD5

          52b28d1b15025f4ea0534f7ae9d0f9c3

          SHA1

          1e276114271cf908edd35547863f31e4460252a9

          SHA256

          7af2cf2df4b43316571f30f7e6ce7e66742d6d43a568ac64a153c7499c9c34f3

          SHA512

          37bb99f27c33794f57d4449fcaf2fe6607cf1dfde8d32058c655af20fdac14502da9c8d130d750788c78a4ca40e9ba166f66d1606c5504082260a675f6d14be4

        • memory/2384-17-0x0000000077351000-0x0000000077471000-memory.dmp

          Filesize

          1.1MB

        • memory/2384-20-0x0000000000490000-0x00000000016E4000-memory.dmp

          Filesize

          18.3MB

        • memory/2384-24-0x0000000077351000-0x0000000077471000-memory.dmp

          Filesize

          1.1MB

        • memory/2384-19-0x0000000000490000-0x00000000016E4000-memory.dmp

          Filesize

          18.3MB

        • memory/2384-16-0x00000000773D8000-0x00000000773D9000-memory.dmp

          Filesize

          4KB

        • memory/2384-35-0x0000000000490000-0x00000000016E4000-memory.dmp

          Filesize

          18.3MB

        • memory/2588-50-0x0000000000490000-0x00000000016E4000-memory.dmp

          Filesize

          18.3MB

        • memory/3996-45-0x0000000077351000-0x0000000077471000-memory.dmp

          Filesize

          1.1MB

        • memory/3996-46-0x00000000750F0000-0x00000000750F7000-memory.dmp

          Filesize

          28KB

        • memory/4204-15-0x0000000074040000-0x0000000074047000-memory.dmp

          Filesize

          28KB

        • memory/4204-14-0x0000000077351000-0x0000000077471000-memory.dmp

          Filesize

          1.1MB