Analysis

  • max time kernel
    160s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-03-2024 16:52

General

  • Target

    b7e64f5728d2d7d0dcf2d199d69cbc4c.exe

  • Size

    4.5MB

  • MD5

    b7e64f5728d2d7d0dcf2d199d69cbc4c

  • SHA1

    8d2f540b098bceebd371f093132c9d80fef24b04

  • SHA256

    0aaba0e2f376d80ae7ae9ee04d08fb2219d1ab87cc133f9f05971429c0403021

  • SHA512

    9511fdf046e3bf343d8b0e230f22328a2044f4e105c41483e8499c29f31d7ef09df56ed7eb623a943010199534399cf8cce31b7b743845500848ac7a1c4e1d6d

  • SSDEEP

    98304:YJfS2jP3BoMvnGdSOaiW4qOeW20lCsfwbbjTtskzz7kLobA9Y/oBEJTHBJoBke:YfU2aeWlqnftVf74sQYAUFJoBV

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Signatures

  • Glupteba

    Glupteba is a modular loader written in Golang with various components.

  • Glupteba payload 22 IoCs
  • MetaSploit

    Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Manipulates WinMonFS driver. 1 IoCs

    Roottkits write to WinMonFS to hide directories/files from being detected.

  • Drops file in System32 directory 8 IoCs
  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • GoLang User-Agent 4 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\b7e64f5728d2d7d0dcf2d199d69cbc4c.exe
    "C:\Users\Admin\AppData\Local\Temp\b7e64f5728d2d7d0dcf2d199d69cbc4c.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1716
    • C:\Users\Admin\AppData\Local\Temp\b7e64f5728d2d7d0dcf2d199d69cbc4c.exe
      "C:\Users\Admin\AppData\Local\Temp\b7e64f5728d2d7d0dcf2d199d69cbc4c.exe"
      2⤵
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3392
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4312
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          PID:3472
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /61-61
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3712
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
          4⤵
          • Creates scheduled task(s)
          PID:3312
        • C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
          C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:5008
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1588

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe

      Filesize

      281KB

      MD5

      d98e33b66343e7c96158444127a117f6

      SHA1

      bb716c5509a2bf345c6c1152f6e3e1452d39d50d

      SHA256

      5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

      SHA512

      705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

    • C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\E0F5C59F9FA661F6F4C50B87FEF3A15A

      Filesize

      893B

      MD5

      d4ae187b4574036c2d76b6df8a8c1a30

      SHA1

      b06f409fa14bab33cbaf4a37811b8740b624d9e5

      SHA256

      a2ce3a0fa7d2a833d1801e01ec48e35b70d84f3467cc9f8fab370386e13879c7

      SHA512

      1f44a360e8bb8ada22bc5bfe001f1babb4e72005a46bc2a94c33c4bd149ff256cce6f35d65ca4f7fc2a5b9e15494155449830d2809c8cf218d0b9196ec646b0c

    • C:\Windows\rss\csrss.exe

      Filesize

      3.2MB

      MD5

      f04e5294280bc4c0d7025adfe666bb66

      SHA1

      f513506dc6e25605d2ca8e3697b7f086195e8a69

      SHA256

      af9af963a70901e446574928760bc839d3a4ff2e8f67fcf39d0d28cfaac9b9fc

      SHA512

      1aaa361d4b8c96ce1564a74467d7591afa4e4e1a59a454c195c4d47ecbbac37c59d01f67376d2e075ba55c0e5c63187c29f2b6f34c300be60089a81983e5368e

    • C:\Windows\rss\csrss.exe

      Filesize

      3.1MB

      MD5

      0c50511baf20b60c1532085428068d4d

      SHA1

      d8b30f7b36dce569c001da1f0060bc5e45858733

      SHA256

      2a5b2f344329482f04a3838dbeca7a98043eccaaeee8226f77391cea376cf86e

      SHA512

      87ded992cc254070034052ec8dbb4c1ae6c019a0c5bd1852602d3300989c2ac615039e7916906f1478277a28ba27bbd4f806838eadf4679266b43cc34d3d3fdb

    • memory/1716-3-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/1716-2-0x0000000001440000-0x0000000001D66000-memory.dmp

      Filesize

      9.1MB

    • memory/1716-1-0x0000000001000000-0x000000000143E000-memory.dmp

      Filesize

      4.2MB

    • memory/1716-4-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/1716-6-0x0000000001440000-0x0000000001D66000-memory.dmp

      Filesize

      9.1MB

    • memory/3392-7-0x0000000001100000-0x0000000001548000-memory.dmp

      Filesize

      4.3MB

    • memory/3392-8-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3392-12-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-54-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-47-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-16-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-15-0x0000000001600000-0x0000000001B00000-memory.dmp

      Filesize

      5.0MB

    • memory/3712-49-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-43-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-44-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-45-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-46-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-35-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-48-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-42-0x0000000001600000-0x0000000001B00000-memory.dmp

      Filesize

      5.0MB

    • memory/3712-50-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-51-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-52-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-53-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB

    • memory/3712-41-0x0000000000400000-0x0000000000D41000-memory.dmp

      Filesize

      9.3MB