Analysis

  • max time kernel
    101s
  • max time network
    105s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250313-en
  • resource tags

    arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31/03/2025, 13:39

General

  • Target

    Build.exe

  • Size

    245KB

  • MD5

    8ada41ef81ed91792ec1bc128daa0d2f

  • SHA1

    12064be78a56ee540b1fa8d2257dcf487de4e82d

  • SHA256

    a7d45abc7981ac8e1d5e2f7e64ac063c083d9112dd8cd79440d892360b3a3224

  • SHA512

    a4e086f307dce33cfc3abc13989b8da8d2558ecf85a0f5e04338fb441560a56e94281c3afbb1a06f2dc18ee4e5149b1a28a0e11c05a7d7b6a1117a436000dc5d

  • SSDEEP

    6144:Ze5/oFzXx7YxnXywmipeHlUusJQLoqb+tpbz:U5wFzB7YxnXy+peOvL

Malware Config

Signatures

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Stormkitty family
  • Uses browser remote debugging 2 TTPs 5 IoCs

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

  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Looks up external IP address via web service 2 IoCs

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

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

    Enumerate browser information.

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • 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.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • 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
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Build.exe
    "C:\Users\Admin\AppData\Local\Temp\Build.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:2944
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Wi-Fi Discovery
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:5088
      • C:\Windows\SysWOW64\netsh.exe
        netsh wlan show profile
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Wi-Fi Discovery
        PID:4300
      • C:\Windows\SysWOW64\findstr.exe
        findstr All
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2232
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4440
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:464
      • C:\Windows\SysWOW64\netsh.exe
        netsh wlan show networks mode=bssid
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:5144
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --window-position=-2400,-2400 --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:5900
      • 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=133.0.6943.60 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ff931ecdcf8,0x7ff931ecdd04,0x7ff931ecdd10
        3⤵
          PID:4944
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --string-annotations --gpu-preferences=UAAAAAAAAADgAAAEAAAAAAAAAAAAAAAAAABgAAEAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAIAAAAAAAAAAgAAAAAAAAA --field-trial-handle=1964,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=1960 /prefetch:2
          3⤵
            PID:3964
          • 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 --string-annotations --field-trial-handle=1468,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=2260 /prefetch:11
            3⤵
              PID:2064
            • 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 --string-annotations --field-trial-handle=2364,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=2532 /prefetch:13
              3⤵
                PID:5644
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --string-annotations --enable-dinosaur-easter-egg-alt-images --remote-debugging-port=9222 --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3292,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=3324 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:1212
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --string-annotations --enable-dinosaur-easter-egg-alt-images --remote-debugging-port=9222 --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3328,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=3360 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:4908
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --string-annotations --extension-process --enable-dinosaur-easter-egg-alt-images --remote-debugging-port=9222 --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=4252,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=4304 /prefetch:9
                3⤵
                • Uses browser remote debugging
                PID:2696
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --string-annotations --enable-dinosaur-easter-egg-alt-images --remote-debugging-port=9222 --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --field-trial-handle=4736,i,14255066086836899363,8591568385546226145,262144 --variations-seed-version=20250313-050105.095000 --mojo-platform-channel-handle=2896 /prefetch:1
                3⤵
                • Uses browser remote debugging
                PID:3916
          • C:\Program Files\Google\Chrome\Application\133.0.6943.60\elevation_service.exe
            "C:\Program Files\Google\Chrome\Application\133.0.6943.60\elevation_service.exe"
            1⤵
              PID:5116

            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

            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

              Filesize

              80KB

              MD5

              88b4838ccc1eba470ad075ce5628361e

              SHA1

              5bce31d7a1222344055d50c3f16551b348d55ea6

              SHA256

              4f3716c71051d118dc50cc6f7b8531b8e3049be1ce321be4bded8edfab14941e

              SHA512

              9dc2fcc8828ff209e4b0399af8805961f0d3b8ec53a0aa0a815147c826a054c3a4bad536d97f197ce2f23425657173fd44906c84dbc82961423e38aceb2a523c

            • C:\Users\Admin\AppData\Local\Temp\212.102.63.147\Browsers\Firefox\FirefoxBookmarks.txt

              Filesize

              81B

              MD5

              ea511fc534efd031f852fcf490b76104

              SHA1

              573e5fa397bc953df5422abbeb1a52bf94f7cf00

              SHA256

              e5fe7f327ae62df007bd1117aa7f522dbbcd371ec67953f66d786424cb1d7995

              SHA512

              f7d8e575a2332b0fbd491b5e092b7ed6b0942a5165557fcc5d215d873b05103aa6ba01843133871c1c7ac81b10182a15895be49885c98d1a379dd55f88004fae

            • C:\Users\Admin\AppData\Local\Temp\212.102.63.147\System\Process.txt

              Filesize

              4KB

              MD5

              6ed502efb04756e27698c6488e87dee7

              SHA1

              fc5693bc25f130816fca112651079cb36fb4f85e

              SHA256

              6531456bf1d00491682c0652066275505c051b8ed75cc8fb20a2163f78ce210a

              SHA512

              8bf633a97f861af9e7fa6a2e750f56b406d530a47a83d92cf11da7160e4c7dd991ccceeddc31e8644da21a00258985936489383e04bcb9dc0be0596bf414e69c

            • memory/2944-4-0x0000000006A40000-0x0000000006F6C000-memory.dmp

              Filesize

              5.2MB

            • memory/2944-7-0x0000000007690000-0x0000000007722000-memory.dmp

              Filesize

              584KB

            • memory/2944-6-0x00000000069C0000-0x0000000006A26000-memory.dmp

              Filesize

              408KB

            • memory/2944-87-0x0000000007FE0000-0x0000000008586000-memory.dmp

              Filesize

              5.6MB

            • memory/2944-5-0x0000000006630000-0x0000000006642000-memory.dmp

              Filesize

              72KB

            • memory/2944-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

              Filesize

              4KB

            • memory/2944-3-0x0000000074DF0000-0x00000000755A1000-memory.dmp

              Filesize

              7.7MB

            • memory/2944-2-0x0000000005AC0000-0x0000000005C82000-memory.dmp

              Filesize

              1.8MB

            • memory/2944-1-0x0000000000EC0000-0x0000000000F04000-memory.dmp

              Filesize

              272KB

            • memory/2944-191-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

              Filesize

              4KB

            • memory/2944-196-0x0000000074DF0000-0x00000000755A1000-memory.dmp

              Filesize

              7.7MB

            • memory/2944-216-0x0000000074DF0000-0x00000000755A1000-memory.dmp

              Filesize

              7.7MB