Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    20-07-2024 22:16

General

  • Target

    app.exe

  • Size

    4.4MB

  • MD5

    a6a6273d29cecf465de73ee6d11861c2

  • SHA1

    d3eccd9bb6c17698e726ded7b9f9893a51c5424f

  • SHA256

    5f9c7df75c9a1dd3d35653d404d346acbceb5d588479daeaee5ba37ee92e0dfd

  • SHA512

    f20e942a7f64bcba37a84ee9210f5f9b484b60a6077791c38fb0e0b984d51570a887cdc96d18aeb2503469e767d6e31b4eb32676f07b016aed5af06f88a097c1

  • SSDEEP

    49152:9qxYJWuwdHTjE3czWc6SG+IG/k8i4RjCrnrQJVq9BFAFvHbRC+VFHyY0Cer4TXVX:9KYwJH3nzWvSTIY7jCrj6jbHyYXk9yz

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Signatures

  • Glupteba

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

  • Glupteba payload 20 IoCs
  • MetaSploit

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

  • Windows security bypass 2 TTPs 10 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 10 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.

  • 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
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

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

  • GoLang User-Agent 1 IoCs

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 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 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\app.exe
    "C:\Users\Admin\AppData\Local\Temp\app.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1124
    • C:\Users\Admin\AppData\Local\Temp\app.exe
      "C:\Users\Admin\AppData\Local\Temp\app.exe"
      2⤵
      • Windows security bypass
      • Windows security modification
      • 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:1524
      • 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:4296
        • 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
          • Event Triggered Execution: Netsh Helper DLL
          PID:4580
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe ""
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4888
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:3848
        • 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:4160

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    281KB

    MD5

    d98e33b66343e7c96158444127a117f6

    SHA1

    bb716c5509a2bf345c6c1152f6e3e1452d39d50d

    SHA256

    5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

    SHA512

    705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

  • C:\Windows\rss\csrss.exe

    Filesize

    4.4MB

    MD5

    a6a6273d29cecf465de73ee6d11861c2

    SHA1

    d3eccd9bb6c17698e726ded7b9f9893a51c5424f

    SHA256

    5f9c7df75c9a1dd3d35653d404d346acbceb5d588479daeaee5ba37ee92e0dfd

    SHA512

    f20e942a7f64bcba37a84ee9210f5f9b484b60a6077791c38fb0e0b984d51570a887cdc96d18aeb2503469e767d6e31b4eb32676f07b016aed5af06f88a097c1

  • memory/1124-2-0x0000000005150000-0x0000000005A5B000-memory.dmp

    Filesize

    9.0MB

  • memory/1124-3-0x0000000000400000-0x0000000000D25000-memory.dmp

    Filesize

    9.1MB

  • memory/1124-6-0x0000000005150000-0x0000000005A5B000-memory.dmp

    Filesize

    9.0MB

  • memory/1124-5-0x0000000000400000-0x0000000000D25000-memory.dmp

    Filesize

    9.1MB

  • memory/1124-4-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/1124-1-0x0000000004D10000-0x0000000005143000-memory.dmp

    Filesize

    4.2MB

  • memory/1524-11-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-20-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-26-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-21-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-22-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-23-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-24-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-25-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-14-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-27-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-28-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-29-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-30-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-31-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB

  • memory/4888-32-0x0000000000400000-0x0000000002FCF000-memory.dmp

    Filesize

    43.8MB