Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 00:16

General

  • Target

    f9127efbeab0796c97d00d4de77852e1_JaffaCakes118.exe

  • Size

    4.4MB

  • MD5

    f9127efbeab0796c97d00d4de77852e1

  • SHA1

    97db0d239bcf7b411c437cbc7c73cad4e724c9b6

  • SHA256

    9955a72367666b99df0f5e60c41fd9ae8fde798db2eb7e978f6e791502f2e746

  • SHA512

    3cc0ef9bf4c6761c838ff27b19592f81b7a35764583072195475e732c2705782c3e36ecfd27d34e5133993eab774247bb17c809930239adf5c0d012586299371

  • SSDEEP

    98304:gjUjD1TBOCOPG8ASNlq5ZnwtibuDIhxGIYOhneHlcxtsYKlXCrK:JTB3OuZSNOwtibFhflqei7AK

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Signatures

  • Glupteba

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

  • Glupteba payload 21 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.

  • 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 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 3 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\f9127efbeab0796c97d00d4de77852e1_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f9127efbeab0796c97d00d4de77852e1_JaffaCakes118.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3288
    • C:\Users\Admin\AppData\Local\Temp\f9127efbeab0796c97d00d4de77852e1_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\f9127efbeab0796c97d00d4de77852e1_JaffaCakes118.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:2580
      • 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:5104
        • 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:3444
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /197-197
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4100
        • 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:3804
        • 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:4668

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

    f9127efbeab0796c97d00d4de77852e1

    SHA1

    97db0d239bcf7b411c437cbc7c73cad4e724c9b6

    SHA256

    9955a72367666b99df0f5e60c41fd9ae8fde798db2eb7e978f6e791502f2e746

    SHA512

    3cc0ef9bf4c6761c838ff27b19592f81b7a35764583072195475e732c2705782c3e36ecfd27d34e5133993eab774247bb17c809930239adf5c0d012586299371

  • memory/2580-8-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2580-7-0x00000000011F0000-0x0000000001636000-memory.dmp

    Filesize

    4.3MB

  • memory/2580-12-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/3288-2-0x00000000017F0000-0x0000000002116000-memory.dmp

    Filesize

    9.1MB

  • memory/3288-1-0x00000000013A0000-0x00000000017E8000-memory.dmp

    Filesize

    4.3MB

  • memory/3288-6-0x00000000017F0000-0x0000000002116000-memory.dmp

    Filesize

    9.1MB

  • memory/3288-3-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/3288-4-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-26-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-29-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-16-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-23-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-25-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-24-0x0000000001800000-0x0000000001D00000-memory.dmp

    Filesize

    5.0MB

  • memory/4100-15-0x0000000001800000-0x0000000001D00000-memory.dmp

    Filesize

    5.0MB

  • memory/4100-27-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-28-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-17-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-30-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-31-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-32-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-33-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-34-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-35-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/4100-36-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB