Analysis

  • max time kernel
    98s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/02/2024, 09:51

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.

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Suspicious use of SetThreadContext 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 30 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:2776
    • 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:392
      • 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:552
        • C:\ProgramData\vsystems\vsystems.exe
          "C:\ProgramData\vsystems\vsystems.exe"
          4⤵
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of NtCreateThreadExHideFromDebugger
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3464
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:5072
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              5⤵
                PID:636
              • C:\ProgramData\vsystems\vsystems.exe
                C:\ProgramData\vsystems\vsystems.exe /stext "C:\Users\Admin\AppData\Local\Temp\naqbqgarirxnnzilghchyqbfmiel"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                PID:2740
              • C:\ProgramData\vsystems\vsystems.exe
                C:\ProgramData\vsystems\vsystems.exe /stext "C:\Users\Admin\AppData\Local\Temp\ycvlqylswzpaxfwpprxiavwwvpwuqzx"
                5⤵
                • Executes dropped EXE
                • Accesses Microsoft Outlook accounts
                PID:1700
              • C:\ProgramData\vsystems\vsystems.exe
                C:\ProgramData\vsystems\vsystems.exe /stext "C:\Users\Admin\AppData\Local\Temp\awie"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4620
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 3464 -s 1432
                5⤵
                • Program crash
                PID:4184
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3464 -ip 3464
        1⤵
          PID:4532

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\ProgramData\vsystems\vsystems.exe

                Filesize

                431KB

                MD5

                2d445bd0fd5ca61eb05f2a293e7e9ecb

                SHA1

                4728f6650d9658ad6c9db2a1c01c88b0bd9be712

                SHA256

                c5bbe31a17d4365500acaf7bd2fbfc10f8a0867d650e12b24e22efa239cfdb3d

                SHA512

                a8939d865005272c265e8c235153bffad905d6cb28aabd9599e707d2e09f55e3fc876d85a68da75947df4af5dde7b2d81916bf5d53e3319194fe2eb16414fd30

              • C:\ProgramData\vsystems\vsystems.exe

                Filesize

                257KB

                MD5

                ef91146cf8c01b2a876b537a478f72f2

                SHA1

                f26e6cee54c78f3a1640a76140f6231f61dd6a04

                SHA256

                170c83ee6d864797418effaa4dd0ef0a5d5b807804ba8c9aa3a64ee9bde551d9

                SHA512

                61a26f374811c86ea58807c1d3a33a3e3640d820a4ecb16273becec1c90cc9579c14957a0b30943b62b7f8b30111826036d7739b388f59818c0add4a7568300d

              • 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\naqbqgarirxnnzilghchyqbfmiel

                Filesize

                4KB

                MD5

                9d1c4331e92ea47959e79f26ca09d973

                SHA1

                f8baa65953243feba3299fbaa7af110fbc7011b2

                SHA256

                ffddf68859952ecc2a486189ef0b15519f898d4d1ba04f6555264714b2d9108f

                SHA512

                76cc4cfa6a89d69035c0539294a5903f5b9b01314aaa2ffef7ccc6a5cdc163bf2336fa98e6f5406510b74c8da8bf5cbac5c55718df58f3b082b7fe8f8dda3daf

              • C:\Users\Admin\AppData\Local\Temp\nsg3C40.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/392-20-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/392-25-0x0000000077581000-0x00000000776A1000-memory.dmp

                Filesize

                1.1MB

              • memory/392-35-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/392-19-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/392-17-0x0000000077581000-0x00000000776A1000-memory.dmp

                Filesize

                1.1MB

              • memory/392-16-0x0000000077608000-0x0000000077609000-memory.dmp

                Filesize

                4KB

              • memory/552-45-0x0000000075140000-0x0000000075147000-memory.dmp

                Filesize

                28KB

              • memory/636-63-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB

              • memory/636-98-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB

              • memory/1700-82-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/1700-83-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/1700-79-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/1700-66-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/2740-73-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2740-68-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2740-64-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2740-90-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2776-14-0x0000000077581000-0x00000000776A1000-memory.dmp

                Filesize

                1.1MB

              • memory/2776-15-0x0000000074270000-0x0000000074277000-memory.dmp

                Filesize

                28KB

              • memory/3464-49-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/3464-93-0x0000000037F50000-0x0000000037F69000-memory.dmp

                Filesize

                100KB

              • memory/3464-96-0x0000000037F50000-0x0000000037F69000-memory.dmp

                Filesize

                100KB

              • memory/3464-97-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/3464-50-0x0000000000490000-0x00000000016E4000-memory.dmp

                Filesize

                18.3MB

              • memory/4620-80-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4620-87-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4620-86-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/4620-71-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/5072-54-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB

              • memory/5072-59-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB

              • memory/5072-56-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB

              • memory/5072-57-0x0000000000400000-0x0000000000490000-memory.dmp

                Filesize

                576KB