Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/01/2024, 15:46

General

  • Target

    6043ead64c148a5cc28fac2aa7c7c924.exe

  • Size

    4.5MB

  • MD5

    6043ead64c148a5cc28fac2aa7c7c924

  • SHA1

    a8dfc989fb42f41a4b908bc9c18ed701fb64c4e7

  • SHA256

    3dd82819d8eb2be6e46f50381ea3f93e398e0fa9ea12f7225a12f312d48eea0e

  • SHA512

    1e2a5116d25d7d0a3059a95c4109b8d2789613b1be47952d4cb8c7e8d6e6a83f32b1e7bf3eefbbe9b1fa2b827ca6b46c1ef71f64a48df328860702a7d431a2b7

  • SSDEEP

    98304:9nPlaj7p8ntUSJDmaLZggnIRbB2lf9WQpsVVy5WHwCbbxC/g:9n9SqUGXfnIR8pYQClQDI

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 1 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
  • Program crash 1 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 3 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\6043ead64c148a5cc28fac2aa7c7c924.exe
    "C:\Users\Admin\AppData\Local\Temp\6043ead64c148a5cc28fac2aa7c7c924.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4792
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4792 -s 768
      2⤵
      • Program crash
      PID:1156
    • C:\Users\Admin\AppData\Local\Temp\6043ead64c148a5cc28fac2aa7c7c924.exe
      "C:\Users\Admin\AppData\Local\Temp\6043ead64c148a5cc28fac2aa7c7c924.exe"
      2⤵
      • Adds Run key to start application
      • Drops file in System32 directory
      • 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:3948
      • 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:2968
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe ""
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2812
        • 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:5064
        • 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:3384
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4792 -ip 4792
    1⤵
      PID:2196
    • C:\Windows\system32\netsh.exe
      netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
      1⤵
      • Modifies Windows Firewall
      PID:4876

    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\rss\csrss.exe

            Filesize

            124KB

            MD5

            14ec62f4160db7612864c0b8e068b0c5

            SHA1

            8b909c11bfabb59e94729947b504eba2f695b663

            SHA256

            86f6424d38ac52bfc151006098fad59351c1b3997c65c8572fca87a3e4766475

            SHA512

            7f8498d404ae60ca5b564160a20e75a54361c5800320775fcee22769ef3b3a8095e5b74e5a97ca848e14388bb611c90ae73f2f818506e9f15567d4ca2a22948e

          • C:\Windows\rss\csrss.exe

            Filesize

            75KB

            MD5

            a0bf5b1e98a7fe6dff8ee2a0d47f2ef8

            SHA1

            009d0c5dd7e2d752d14a3b1384a8cd637f11d2e2

            SHA256

            886d79101937e0740bf89938963693e45fd4c276ed61272fcd4116a025f6cfe5

            SHA512

            cb2f5ce684414539ec024ad9e0d07bae2b9511c8ff5b01a0651e6eb6dbb3d3e87343deacf66cbdbd86a0d913915963219bb61c22519c91ea5ba9d8d76fd396e3

          • memory/2812-34-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-35-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-41-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-40-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-39-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-38-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-37-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-36-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-20-0x0000000002E00000-0x0000000003300000-memory.dmp

            Filesize

            5.0MB

          • memory/2812-21-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-22-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-23-0x0000000002E00000-0x0000000003300000-memory.dmp

            Filesize

            5.0MB

          • memory/2812-33-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-29-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-30-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-31-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/2812-32-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/3948-17-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/3948-9-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/3948-8-0x0000000002E90000-0x00000000037B6000-memory.dmp

            Filesize

            9.1MB

          • memory/3948-7-0x0000000002A40000-0x0000000002E86000-memory.dmp

            Filesize

            4.3MB

          • memory/4792-2-0x0000000002F80000-0x00000000038A6000-memory.dmp

            Filesize

            9.1MB

          • memory/4792-1-0x0000000002B30000-0x0000000002F7A000-memory.dmp

            Filesize

            4.3MB

          • memory/4792-6-0x0000000002F80000-0x00000000038A6000-memory.dmp

            Filesize

            9.1MB

          • memory/4792-3-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB

          • memory/4792-5-0x0000000000400000-0x0000000000D41000-memory.dmp

            Filesize

            9.3MB