Analysis

  • max time kernel
    160s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-04-2024 23:23

General

  • Target

    f8fadc750ba7c1bda56b1689924743ef_JaffaCakes118.exe

  • Size

    4.5MB

  • MD5

    f8fadc750ba7c1bda56b1689924743ef

  • SHA1

    4caf46db9a65dfb5bc5c125bdaaa6c2048b22e8d

  • SHA256

    a4561c8115ba9a40d8ccc6411379e8db03ac8540c681b8aae63763a7e8c10a27

  • SHA512

    8294210c36784a8e8441bdff2975d2f3b84c5bc8e14c1a284b95a7042e0560ea0ba26c8c1423b40fba5bed307c5454c2b68b4cce29192ec9b4a31f92c10a13a8

  • SSDEEP

    98304:6Iev6FAUK0yeGoUyB2CguC9zlb0WheNDZSApIksg8MnK:6OFAaGouBt0ZDZHp3RK

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.

  • 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 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 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\f8fadc750ba7c1bda56b1689924743ef_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f8fadc750ba7c1bda56b1689924743ef_JaffaCakes118.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4444
    • C:\Users\Admin\AppData\Local\Temp\f8fadc750ba7c1bda56b1689924743ef_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\f8fadc750ba7c1bda56b1689924743ef_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:1984
      • 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:976
        • 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:3436
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /124-124
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3124
        • 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:4764
        • 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:3068
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4444 -s 816
      2⤵
      • Program crash
      PID:3880
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4444 -ip 4444
    1⤵
      PID:3592
    • 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=3020 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:368

      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

        4.5MB

        MD5

        f8fadc750ba7c1bda56b1689924743ef

        SHA1

        4caf46db9a65dfb5bc5c125bdaaa6c2048b22e8d

        SHA256

        a4561c8115ba9a40d8ccc6411379e8db03ac8540c681b8aae63763a7e8c10a27

        SHA512

        8294210c36784a8e8441bdff2975d2f3b84c5bc8e14c1a284b95a7042e0560ea0ba26c8c1423b40fba5bed307c5454c2b68b4cce29192ec9b4a31f92c10a13a8

      • memory/1984-8-0x0000000001170000-0x00000000015B5000-memory.dmp

        Filesize

        4.3MB

      • memory/1984-13-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/1984-9-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-18-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-26-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-36-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-35-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-34-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-16-0x0000000001600000-0x0000000001B00000-memory.dmp

        Filesize

        5.0MB

      • memory/3124-17-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-33-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-32-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-24-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-25-0x0000000001600000-0x0000000001B00000-memory.dmp

        Filesize

        5.0MB

      • memory/3124-31-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-27-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-28-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-29-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/3124-30-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/4444-7-0x0000000001500000-0x0000000001E26000-memory.dmp

        Filesize

        9.1MB

      • memory/4444-2-0x0000000001500000-0x0000000001E26000-memory.dmp

        Filesize

        9.1MB

      • memory/4444-1-0x00000000010C0000-0x0000000001500000-memory.dmp

        Filesize

        4.2MB

      • memory/4444-3-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/4444-4-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB

      • memory/4444-6-0x0000000000400000-0x0000000000D41000-memory.dmp

        Filesize

        9.3MB