Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-01-2025 02:13

General

  • Target

    30aa5d63d57d96e48788efcf488f3fb7ba05354313a383f15d5c5caca632c87c.exe

  • Size

    5.7MB

  • MD5

    fb25fdd6ff14150c12aadd9ee2d1a132

  • SHA1

    3cfb3536cd95f0b45e3540241b29aaac8195969b

  • SHA256

    30aa5d63d57d96e48788efcf488f3fb7ba05354313a383f15d5c5caca632c87c

  • SHA512

    ffa52a7225aab5c5518d2ec872b20bb81a964b41205308cb72356e8f443b333a89239920989ffe032f5b5009d34ea04c4ffa8944e648633321c9a6685a3d9494

  • SSDEEP

    98304:m2+l27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6Ucz:moOuK6mn9NzgMoYkSIvUcwti7TQlvciE

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendDocument?chat_id=-1002258988684&caption=%F0%9F%93%82%20-%20Browser%20data%0A%E2%94%9C%E2%94%80%E2%94%80%20%F0%9F%93%82%20-%20cookies(0.25%20kb

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendMessage?chat_id=-1002258988684

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendDocument?chat_id=-1002258988684&caption=%F0%9F%93%B8Screenshot%20take

Signatures

  • Gurcu family
  • Gurcu, WhiteSnake

    Gurcu aka WhiteSnake is a malware stealer written in C#.

  • Uses browser remote debugging 2 TTPs 1 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 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.

  • Enumerates processes with tasklist 1 TTPs 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).

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30aa5d63d57d96e48788efcf488f3fb7ba05354313a383f15d5c5caca632c87c.exe
    "C:\Users\Admin\AppData\Local\Temp\30aa5d63d57d96e48788efcf488f3fb7ba05354313a383f15d5c5caca632c87c.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1576
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpEE77.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpEE77.tmp.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3060
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4988
        • C:\Windows\system32\tasklist.exe
          Tasklist /fi "PID eq 1576"
          3⤵
          • Enumerates processes with tasklist
          • Suspicious use of AdjustPrivilegeToken
          PID:4568
        • C:\Windows\system32\find.exe
          find ":"
          3⤵
            PID:1316
          • C:\Windows\system32\timeout.exe
            Timeout /T 1 /Nobreak
            3⤵
            • Delays execution with timeout.exe
            PID:4824
          • C:\Users\Admin\AppData\Roaming\AdobeUpdate\conhost.exe
            "C:\Users\Admin\AppData\Roaming\AdobeUpdate\conhost.exe"
            3⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Loads dropped DLL
            • Checks processor information in registry
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3892
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdate\conhost.exe /f
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:2788
              • C:\Windows\system32\reg.exe
                reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdate\conhost.exe /f
                5⤵
                • Adds Run key to start application
                • Modifies registry key
                PID:2608
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --user-data-dir="C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --profile-directory="Default" --headless --no-sandbox --disable-gpu
              4⤵
              • Uses browser remote debugging
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2856
              • 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=0x10c,0x110,0x114,0xe8,0x118,0x7ffde804cc40,0x7ffde804cc4c,0x7ffde804cc58
                5⤵
                  PID:696
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-sandbox --headless --use-angle=swiftshader-webgl --headless --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --use-gl=angle --use-angle=swiftshader-webgl --field-trial-handle=1488,i,6906437190134259092,843316112711196903,262144 --disable-features=PaintHolding --variations-seed-version --mojo-platform-channel-handle=1476 /prefetch:2
                  5⤵
                    PID:4840
                  • 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-sandbox --use-angle=swiftshader-webgl --use-gl=angle --headless --field-trial-handle=1572,i,6906437190134259092,843316112711196903,262144 --disable-features=PaintHolding --variations-seed-version --mojo-platform-channel-handle=1568 /prefetch:3
                    5⤵
                      PID:2028

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\Costura\05A92EC28EDC5561548638CAA951F864\64\sqlite.interop.dll

              Filesize

              1.7MB

              MD5

              65ccd6ecb99899083d43f7c24eb8f869

              SHA1

              27037a9470cc5ed177c0b6688495f3a51996a023

              SHA256

              aba67c7e6c01856838b8bc6b0ba95e864e1fdcb3750aa7cdc1bc73511cea6fe4

              SHA512

              533900861fe36cf78b614d6a7ce741ff1172b41cbd5644b4a9542e6ca42702e6fbfb12f0fbaae8f5992320870a15e90b4f7bf180705fc9839db433413860be6d

            • C:\Users\Admin\AppData\Local\Temp\tmpEE77.tmp.bat

              Filesize

              343B

              MD5

              26874e3fa5b76d46a9423d4e1e289278

              SHA1

              73ee73e5d6222dd3c4214a50083b0d3b7cb384be

              SHA256

              1065fdaca90873c4a49a9e270450eb1006f72226d71ced1671ba07ba77618642

              SHA512

              60a77721a6de6905563de3463a2b061c9e2fb35479355ebae176a6d6db56a2efbb9d040cbf415e17ae23dad7d2dc090bf8670623710956b12d019195254bff7f

            • C:\Users\Admin\AppData\Roaming\AdobeUpdate\conhost.exe

              Filesize

              5.7MB

              MD5

              fb25fdd6ff14150c12aadd9ee2d1a132

              SHA1

              3cfb3536cd95f0b45e3540241b29aaac8195969b

              SHA256

              30aa5d63d57d96e48788efcf488f3fb7ba05354313a383f15d5c5caca632c87c

              SHA512

              ffa52a7225aab5c5518d2ec872b20bb81a964b41205308cb72356e8f443b333a89239920989ffe032f5b5009d34ea04c4ffa8944e648633321c9a6685a3d9494

            • memory/1576-8-0x000001852F510000-0x000001852F52E000-memory.dmp

              Filesize

              120KB

            • memory/1576-0-0x00007FFDEED13000-0x00007FFDEED15000-memory.dmp

              Filesize

              8KB

            • memory/1576-9-0x000001852F4F0000-0x000001852F4FA000-memory.dmp

              Filesize

              40KB

            • memory/1576-10-0x00007FFDEED10000-0x00007FFDEF7D1000-memory.dmp

              Filesize

              10.8MB

            • memory/1576-14-0x00007FFDEED10000-0x00007FFDEF7D1000-memory.dmp

              Filesize

              10.8MB

            • memory/1576-7-0x00007FFDEED10000-0x00007FFDEF7D1000-memory.dmp

              Filesize

              10.8MB

            • memory/1576-6-0x000001852F5C0000-0x000001852F636000-memory.dmp

              Filesize

              472KB

            • memory/1576-1-0x000001852D230000-0x000001852D7F2000-memory.dmp

              Filesize

              5.8MB

            • memory/3892-24-0x000001F8C52F0000-0x000001F8C5340000-memory.dmp

              Filesize

              320KB

            • memory/3892-23-0x000001F8C51F0000-0x000001F8C52A2000-memory.dmp

              Filesize

              712KB

            • memory/3892-25-0x000001F8C5540000-0x000001F8C5562000-memory.dmp

              Filesize

              136KB

            • memory/3892-27-0x000001F8C61C0000-0x000001F8C61FA000-memory.dmp

              Filesize

              232KB

            • memory/3892-28-0x000001F8C5570000-0x000001F8C5596000-memory.dmp

              Filesize

              152KB

            • memory/3892-29-0x000001F8C6200000-0x000001F8C652E000-memory.dmp

              Filesize

              3.2MB

            • memory/3892-48-0x000001F8C61A0000-0x000001F8C61B2000-memory.dmp

              Filesize

              72KB

            • memory/3892-54-0x000001F8C67A0000-0x000001F8C684A000-memory.dmp

              Filesize

              680KB

            • memory/3892-55-0x000001F8C65C0000-0x000001F8C65FE000-memory.dmp

              Filesize

              248KB

            • memory/3892-21-0x000001F8C5180000-0x000001F8C51EA000-memory.dmp

              Filesize

              424KB