Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-03-2024 10:36

General

  • Target

    411c2e3611e8ee701918cfe17399da79.exe

  • Size

    2.5MB

  • MD5

    411c2e3611e8ee701918cfe17399da79

  • SHA1

    a01d2ceb1b9d0e002eb67a00fbac9238285dce85

  • SHA256

    f0ebd23eac064a10da288dbf3b9db45bdf5e107c970e57f7974710cad01aed04

  • SHA512

    c68a62e0342cdaaa23a8ad385551dff3d7f60e34c28c63797ef8d5969e714df6b0f7fa66a8904aaf65c034c26860f21453434e8678a48d149b2137054ee57b50

  • SSDEEP

    49152:YBO8QRm2I9bC9hY8PU5sevK7F6wd0HL5xRpMrpaKE9eFodKe/HT0:Y88QRmVluhnPyhyx30HlUpaKpodtHT0

Malware Config

Extracted

Family

xworm

Version

3.1

C2

gamemodz.duckdns.org:7000

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

Extracted

Family

remcos

Botnet

RemoteHost

C2

gamemodz.duckdns.org:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    sysupdate.exe

  • copy_folder

    sysupdate

  • delete_file

    true

  • hide_file

    true

  • 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-FEY33U

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Detect Xworm Payload 1 IoCs
  • Detect ZGRat V1 34 IoCs
  • Remcos

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

  • Xworm

    Xworm is a remote access trojan written in C#.

  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Renames multiple (167) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Drops startup file 3 IoCs
  • Executes dropped EXE 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 7 IoCs
  • Drops desktop.ini file(s) 34 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 53 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe
    "C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2252
    • C:\Users\Admin\AppData\Local\Temp\sysupdate.exe
      "C:\Users\Admin\AppData\Local\Temp\sysupdate.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4192
      • C:\ProgramData\sysupdate\sysupdate.exe
        "C:\ProgramData\sysupdate\sysupdate.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3232
        • \??\c:\program files (x86)\internet explorer\iexplore.exe
          "c:\program files (x86)\internet explorer\iexplore.exe"
          4⤵
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3652
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:1968
            • C:\Users\Admin\AppData\Local\Temp\shout.exe
              "C:\Users\Admin\AppData\Local\Temp\shout.exe"
              5⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3004
              • C:\Users\Admin\AppData\Roaming\svchost.exe
                "C:\Users\Admin\AppData\Roaming\svchost.exe"
                6⤵
                • Checks computer location settings
                • Drops startup file
                • Executes dropped EXE
                • Drops desktop.ini file(s)
                • Sets desktop wallpaper using registry
                • Modifies registry class
                • Suspicious behavior: AddClipboardFormatListener
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:3316
                • C:\Windows\system32\NOTEPAD.EXE
                  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
                  7⤵
                  • Opens file in notepad (likely ransom note)
                  PID:2172
      • C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe
        C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe
        2⤵
          PID:2500
        • C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe
          C:\Users\Admin\AppData\Local\Temp\411c2e3611e8ee701918cfe17399da79.exe
          2⤵
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          PID:4972

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\sysupdate\sysupdate.exe

        Filesize

        435KB

        MD5

        596fc315518c02e6d8ba4928c423c144

        SHA1

        6877aecb595df472a9a32ece49572d5e7ad54dd4

        SHA256

        412358ec9fcd5f157f225ade2a4b95797e47b8e01765f62fd4069185776e42e1

        SHA512

        46c2662bf0ec93e552a182c40aa64ca9be49065e1570ca4253dae87649faf52af5449430b866bb677d6bc1ca2bea59baac96cebd3f4eb7df05cb128af51a43be

      • C:\ProgramData\sysupdate\sysupdate.exe

        Filesize

        253KB

        MD5

        c9a771e4f55f9d596156d7b9faf7ba6a

        SHA1

        31975299025f60ba703fcae49995c243d04a0d30

        SHA256

        cb861974b1816e5252f279e93f649d35942e7019e9893d020d6b38f14284c45d

        SHA512

        1ec182e372b229f977945b4fb975cea95939b6879f677f0cb4d4843dbb93cd96ea41047bf9baab38a163e5a398cb6810bf501de9eb501494c1a2dcce9746500e

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\411c2e3611e8ee701918cfe17399da79.exe.log

        Filesize

        927B

        MD5

        ef1b4e3bfd6facbbb8d6a12f5f5e32de

        SHA1

        8f3ef66bf86f1697c520303c78b11d58165d146f

        SHA256

        c652040e1a2f251b1b9e69419d6a53a91e850ea48491b3c54c2ff4a4a2907cd1

        SHA512

        b6329c2a18217008c5e3544313cd1c7135468c5fb45e5104b9fa2f55a1f14804e66b6b9afcaa8e813cb522f536c06dba32f3afd469c4958a7c57d7df4c0e7315

      • C:\Users\Admin\AppData\Local\Temp\shout.exe

        Filesize

        84KB

        MD5

        7051dcbe9a0837a312b09a5ae3b42430

        SHA1

        3553ff8725a57929e438228bf141b695c13cecb4

        SHA256

        ce750c7054359e9e88556d48f7eea341374b74f494caed48251185b54c9ed644

        SHA512

        2e82160bff1fbdd6f6a9f0210dfaf831650fdefdf8e3bb70c3c2717122b107ef3610c5c5f55908843df7ba3bd3bbefc40b9d1dda07877083cbd2ab8b090a276c

      • C:\Users\Admin\AppData\Local\Temp\sysupdate.exe

        Filesize

        483KB

        MD5

        bdfa7710dfc213d8babcd7348440deeb

        SHA1

        ecd7d6ad5a3e0cc8c24ce1f12a40b0c86a769f98

        SHA256

        79ec51c588fccbe876f58de8a0256e27de65aa14f245615c42bd92cc640063fe

        SHA512

        663eb74fba1e38d3f930c0d73787309f86b85852cbccae1b44d3056a6073a95494c1526dc98d132f84a71e379babc5bd6819e76643f82fcd5591e264825fb2ee

      • C:\Users\Admin\Documents\read_it.txt

        Filesize

        140B

        MD5

        ee20a3aaf13c2d8805ede471f1f3ed3c

        SHA1

        bac14bc149af77885de0f6997fe3f3bf3f9686ad

        SHA256

        b9afbd14a42e996a8de6eba45b8a6df17a958f1b269913eab89484f62d373919

        SHA512

        8dea66d1bb1ee359b61fa32e3a45a1d66cf8987fdbec4218ef258b58aaaf9475e77bff2d40f9f28f4a75f321de6f86de6f42ab3cd7afee4e213ffbe3ae03f714

      • memory/1968-4843-0x0000000000EC0000-0x0000000000F42000-memory.dmp

        Filesize

        520KB

      • memory/2252-28-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-18-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-66-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-16-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-3089-0x0000000074ED0000-0x0000000075680000-memory.dmp

        Filesize

        7.7MB

      • memory/2252-20-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-22-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-24-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-26-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-1-0x0000000074ED0000-0x0000000075680000-memory.dmp

        Filesize

        7.7MB

      • memory/2252-30-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-32-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-34-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-36-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-38-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-40-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-42-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-44-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-46-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-48-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-50-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-52-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-54-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-56-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-4780-0x0000000005010000-0x0000000005020000-memory.dmp

        Filesize

        64KB

      • memory/2252-60-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-62-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-64-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-14-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-12-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-58-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-4781-0x00000000056B0000-0x00000000056B1000-memory.dmp

        Filesize

        4KB

      • memory/2252-4782-0x0000000005700000-0x0000000005778000-memory.dmp

        Filesize

        480KB

      • memory/2252-4783-0x00000000058C0000-0x000000000590C000-memory.dmp

        Filesize

        304KB

      • memory/2252-10-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-4792-0x0000000006710000-0x0000000006CB4000-memory.dmp

        Filesize

        5.6MB

      • memory/2252-8-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-0-0x0000000000460000-0x00000000006D6000-memory.dmp

        Filesize

        2.5MB

      • memory/2252-2-0x0000000005090000-0x00000000052C0000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-4799-0x0000000074ED0000-0x0000000075680000-memory.dmp

        Filesize

        7.7MB

      • memory/2252-3-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-6-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/2252-4-0x0000000005090000-0x00000000052BA000-memory.dmp

        Filesize

        2.2MB

      • memory/3004-4866-0x00007FFDB10B0000-0x00007FFDB1B71000-memory.dmp

        Filesize

        10.8MB

      • memory/3004-4880-0x00007FFDB10B0000-0x00007FFDB1B71000-memory.dmp

        Filesize

        10.8MB

      • memory/3004-4864-0x0000000000820000-0x000000000083C000-memory.dmp

        Filesize

        112KB

      • memory/3316-4881-0x00007FFDB10B0000-0x00007FFDB1B71000-memory.dmp

        Filesize

        10.8MB

      • memory/3316-5274-0x00007FFDB10B0000-0x00007FFDB1B71000-memory.dmp

        Filesize

        10.8MB

      • memory/3652-4838-0x0000000000620000-0x00000000006A2000-memory.dmp

        Filesize

        520KB

      • memory/3652-5272-0x0000000000620000-0x00000000006A2000-memory.dmp

        Filesize

        520KB

      • memory/4972-4798-0x0000000000400000-0x0000000000414000-memory.dmp

        Filesize

        80KB

      • memory/4972-4849-0x00000000051A0000-0x0000000005206000-memory.dmp

        Filesize

        408KB

      • memory/4972-4850-0x0000000005070000-0x0000000005080000-memory.dmp

        Filesize

        64KB

      • memory/4972-4801-0x0000000005100000-0x000000000519C000-memory.dmp

        Filesize

        624KB

      • memory/4972-4800-0x0000000074ED0000-0x0000000075680000-memory.dmp

        Filesize

        7.7MB

      • memory/4972-4934-0x0000000006D30000-0x0000000006DC2000-memory.dmp

        Filesize

        584KB

      • memory/4972-5271-0x0000000074ED0000-0x0000000075680000-memory.dmp

        Filesize

        7.7MB

      • memory/4972-5273-0x0000000005070000-0x0000000005080000-memory.dmp

        Filesize

        64KB