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Analysis

  • max time kernel
    148s
  • max time network
    95s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250217-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    20/02/2025, 14:31

General

  • Target

    open-need-this-684.exe

  • Size

    8.7MB

  • MD5

    26ac2cdeefb0f51dbde730908be45003

  • SHA1

    fd6dbec83d04031efd710c3ce882a2539d100485

  • SHA256

    7f52cc060068f787eb046f732beb652d2727f023b6f17ae1323f8a868c75e1ac

  • SHA512

    2554396d1b4d252240cfda1e3120d4ded181434b7d3171dc693a3cdef2a7cc3800556c608fd455189fa24b61cfd1a58c30ce0f358ba712bc56f10ef13571e907

  • SSDEEP

    49152:cQ5EJW5E9u6LX4RS5ECBnUcvNWuGZdMasijz66IJNJkeBxbEFNWIhNajSQrygYKS:cQ25u6KSSIUcVWLHVs0W7CgYKDyz85QV

Malware Config

Extracted

Family

cryptbot

C2

http://home.thrtnn13sr.top/aAhAvaEByhHTjvHqeqsz17

Signatures

  • CryptBot

    CryptBot is a C++ stealer distributed widely in bundle with other software.

  • Cryptbot family
  • Detects CryptBot payload 1 IoCs

    CryptBot is a C++ stealer distributed widely in bundle with other software.

  • Enumerates VirtualBox registry keys 2 TTPs 1 IoCs
  • Uses browser remote debugging 2 TTPs 4 IoCs

    Can be used control the browser and steal sensitive information such as credentials and session cookies.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Windows directory 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\open-need-this-684.exe
    "C:\Users\Admin\AppData\Local\Temp\open-need-this-684.exe"
    1⤵
    • Enumerates VirtualBox registry keys
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1896
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default"
      2⤵
      • Uses browser remote debugging
      • Drops file in Windows directory
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3344
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=123.0.6312.123 --initial-client-data=0x21c,0x220,0x224,0x1f8,0x228,0x7ffedd28cc40,0x7ffedd28cc4c,0x7ffedd28cc58
        3⤵
          PID:2780
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=1944,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=1932 /prefetch:2
          3⤵
            PID:2792
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=2168,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=2420 /prefetch:3
            3⤵
              PID:2116
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=2200,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=2428 /prefetch:8
              3⤵
                PID:4960
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9222 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3204,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=3216 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:2844
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9222 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3240,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=3252 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:3380
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --remote-debugging-port=9222 --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=4296,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=4552 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:3012
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4592,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=4796 /prefetch:8
                3⤵
                  PID:1020
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4792,i,3934585471686773772,5351085715412783331,262144 --variations-seed-version=20250216-180425.389000 --mojo-platform-channel-handle=4816 /prefetch:8
                  3⤵
                    PID:1140
                • C:\Users\Admin\AppData\Local\Temp\service123.exe
                  "C:\Users\Admin\AppData\Local\Temp\service123.exe"
                  2⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • System Location Discovery: System Language Discovery
                  PID:3904
                • C:\Windows\SysWOW64\schtasks.exe
                  "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\Admin\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f
                  2⤵
                  • System Location Discovery: System Language Discovery
                  • Scheduled Task/Job: Scheduled Task
                  PID:4436
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 1896 -s 1592
                  2⤵
                  • Program crash
                  PID:5044
              • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
                "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
                1⤵
                  PID:4120
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1896 -ip 1896
                  1⤵
                    PID:3776
                  • C:\Users\Admin\AppData\Local\Temp\service123.exe
                    "C:\Users\Admin\AppData\Local\Temp\/service123.exe"
                    1⤵
                    • Executes dropped EXE
                    • Loads dropped DLL
                    PID:4232
                  • C:\Users\Admin\AppData\Local\Temp\service123.exe
                    "C:\Users\Admin\AppData\Local\Temp\/service123.exe"
                    1⤵
                    • Executes dropped EXE
                    • Loads dropped DLL
                    PID:2264

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports

                    Filesize

                    2B

                    MD5

                    d751713988987e9331980363e24189ce

                    SHA1

                    97d170e1550eee4afc0af065b78cda302a97674c

                    SHA256

                    4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                    SHA512

                    b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                  • memory/1896-0-0x0000000000FD0000-0x000000000188F000-memory.dmp

                    Filesize

                    8.7MB

                  • memory/1896-1-0x0000000069CC0000-0x000000006A71B000-memory.dmp

                    Filesize

                    10.4MB

                  • memory/1896-10-0x0000000000FD0000-0x000000000188F000-memory.dmp

                    Filesize

                    8.7MB

                  • memory/1896-51-0x0000000000FD0000-0x000000000188F000-memory.dmp

                    Filesize

                    8.7MB

                  • memory/1896-66-0x0000000000FD0000-0x000000000188F000-memory.dmp

                    Filesize

                    8.7MB

                  • memory/2264-84-0x0000000000A60000-0x0000000000A72000-memory.dmp

                    Filesize

                    72KB

                  • memory/3904-70-0x0000000000A60000-0x0000000000A72000-memory.dmp

                    Filesize

                    72KB

                  • memory/3904-71-0x00000000734B0000-0x00000000735E4000-memory.dmp

                    Filesize

                    1.2MB

                  • memory/4232-69-0x0000000000A60000-0x0000000000A72000-memory.dmp

                    Filesize

                    72KB