Analysis

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

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/02/2024, 16:59

General

  • Target

    8769e7d465a0e734599c205f1c35bfc3.exe

  • Size

    4.5MB

  • MD5

    8769e7d465a0e734599c205f1c35bfc3

  • SHA1

    cfc03d84a30986eb523f14cc7a2c14a51e29dac9

  • SHA256

    e2840cc45332618eadf9af184fbffd46416f36c5d8e2fccaba3c7e73c475b92d

  • SHA512

    8551cc5e653e3d50379e7e5f4ba4adbfb89dfd9e4d5f8965f2c84fd9776383662b9e5d77cc51ed09ce5fda635d4c12db651fcf7abc1f3e615bc6b46b51d744d6

  • SSDEEP

    98304:85wRPUelTNSLI23eoWdYwOnkSx+vWFq1PUg0g4XQ7:85w6elR7yetikTvDNqg4g7

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 6 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 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\8769e7d465a0e734599c205f1c35bfc3.exe
    "C:\Users\Admin\AppData\Local\Temp\8769e7d465a0e734599c205f1c35bfc3.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:5048
    • C:\Users\Admin\AppData\Local\Temp\8769e7d465a0e734599c205f1c35bfc3.exe
      "C:\Users\Admin\AppData\Local\Temp\8769e7d465a0e734599c205f1c35bfc3.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:4612
      • 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:4072
        • 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:1276
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /197-197
        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:5108
        • 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:376
        • 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:3440
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4612 -s 1436
        3⤵
        • Program crash
        PID:4184
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 812
      2⤵
      • Program crash
      PID:3164
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5048 -ip 5048
    1⤵
      PID:4492
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4612 -ip 4612
      1⤵
        PID:2876

      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

        633KB

        MD5

        76639d88252c977cd5a746f32461367e

        SHA1

        92159fdcb47e49d60ceac506b27247f3cd293e0b

        SHA256

        2b9da2fb01dadf805e4669c30e89b85f22199424a1594a13732f3641c90677c3

        SHA512

        2c9bdfb5c2c526662bd3c2590abb7a9bb260f93459c04a53a85b091481cd3ac993df7a913b3eeb3f7f6abecbe787feed99825adac2e38a0a9cbb05404b534353

      • C:\Windows\rss\csrss.exe

        Filesize

        824KB

        MD5

        45aa7bec6efa5e3e37a383a77a866071

        SHA1

        59f7e3fdb8393fdad525747056208d8089459e98

        SHA256

        a243ee164a2e164584ff851668ff28d045312905063a7f3ada9b6ca8b0837a45

        SHA512

        a21e57707250f607b7bd55e0c0d7345cce931180435e990da649ba0602ff4a4d9f8d191d52fbf8e9989154a087029f141da331ff28823cb3ec4c72c0e6e6e736

      • memory/4612-16-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/4612-7-0x0000000002B90000-0x0000000002FD4000-memory.dmp

        Filesize

        4.3MB

      • memory/4612-8-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5048-2-0x0000000002DA0000-0x00000000036C6000-memory.dmp

        Filesize

        9.1MB

      • memory/5048-1-0x0000000002960000-0x0000000002D9D000-memory.dmp

        Filesize

        4.2MB

      • memory/5048-5-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5048-3-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5048-6-0x0000000002DA0000-0x00000000036C6000-memory.dmp

        Filesize

        9.1MB

      • memory/5108-27-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-31-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-20-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-18-0x0000000003400000-0x0000000003D26000-memory.dmp

        Filesize

        9.1MB

      • memory/5108-26-0x0000000002E00000-0x0000000003300000-memory.dmp

        Filesize

        5.0MB

      • memory/5108-17-0x0000000002E00000-0x0000000003300000-memory.dmp

        Filesize

        5.0MB

      • memory/5108-28-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-29-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-30-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-19-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-32-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-33-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-34-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-35-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-36-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-37-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-38-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/5108-39-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB