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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27/04/2024, 17:20

General

  • Target

    31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3.exe

  • Size

    4.1MB

  • MD5

    0473ef4659547c66339a72d00c0655a8

  • SHA1

    de0801690033096c5a87bfec4315a395d8bc59bd

  • SHA256

    31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3

  • SHA512

    e0a41cd04df88918e08545d26f9214e3036e09048da6024097e5cdce40a386285d418de04ab4a40fcbd9a47ec1a06168245950000205180e09b08ee8729e8549

  • SSDEEP

    98304:VB+pokA3uLr67t8MVyOHX+J6fh0VTXiCNKfogoP0GUbubAei:VBc4uLrIK0u8fYNDf0GUb+Aei

Malware Config

Signatures

  • Glupteba

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

  • Glupteba payload 16 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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 7 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
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 30 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\31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3.exe
    "C:\Users\Admin\AppData\Local\Temp\31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1484
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4260
    • C:\Users\Admin\AppData\Local\Temp\31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3.exe
      "C:\Users\Admin\AppData\Local\Temp\31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3.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
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3632
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell -nologo -noprofile
        3⤵
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2248
      • 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:4596
        • 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:2516
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell -nologo -noprofile
        3⤵
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2444
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell -nologo -noprofile
        3⤵
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2512
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Manipulates WinMonFS driver.
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1224
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell -nologo -noprofile
          4⤵
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4828
        • 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:5020
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:2340
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            powershell -nologo -noprofile
            4⤵
            • Drops file in System32 directory
            • Modifies data under HKEY_USERS
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3260
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            powershell -nologo -noprofile
            4⤵
            • Drops file in System32 directory
            • Modifies data under HKEY_USERS
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2120
          • 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:4300
          • 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:4584

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jydycfva.su5.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      281KB

      MD5

      d98e33b66343e7c96158444127a117f6

      SHA1

      bb716c5509a2bf345c6c1152f6e3e1452d39d50d

      SHA256

      5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

      SHA512

      705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      ac4917a885cf6050b1a483e4bc4d2ea5

      SHA1

      b1c0a9f27bd21c6bbb8e9be70db8777b4a2a640f

      SHA256

      e39062a62c3c7617feeeff95ea8a0be51104a0d36f46e44eea22556fda74d8d9

      SHA512

      092c67a3ecae1d187cad72a8ea1ea37cb78a0cf79c2cd7fb88953e5990669a2e871267015762fd46d274badb88ac0c1d73b00f1df7394d89bed48a3a45c2ba3d

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

      Filesize

      19KB

      MD5

      293ed8fd1c9e27fb6db51e3588258355

      SHA1

      f75a4b4db9cc84f038aacc45e9e6dd98c831e332

      SHA256

      4b3da996902b6ced3af494c0bdd13cae30fb73f4194e717bff2fc4422b400fda

      SHA512

      f21e391e876cf9b1d4da5e5ddbfa4a9b838e961e5727b97ed3fb5dc28d457d9abb51df0e3215b82a1e53c2bd227d042b42154262d338b04f5874774f2d078166

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

      Filesize

      19KB

      MD5

      a98c6951ea02c7b738176565b2f9a289

      SHA1

      09c0ee168c5e83e9f31da1db4a46a7404bea20c3

      SHA256

      60e47a9edeeb5d0ad6d35db66513add38f785a6d92164a32f9e863e738e95784

      SHA512

      53cb6e2986c390aa171f1adf582982bbabc91a83e566c62c7c383b7f30512620d194849b2076141a484c5fd1179279a0324905fa7928c4d5417b0f1adfd82bbf

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

      Filesize

      19KB

      MD5

      999f588b45b83e2ade17f85cda8d675b

      SHA1

      c658372c0fb412fe1a332aa357b7d464d5a2036a

      SHA256

      46d3f3d8a12cbae2bc869b8573ea9bc9f47001c0e947d0813eeb357bb30cc573

      SHA512

      987a733cc2782da42282b43577f13241e61e25ef0793150f080ddad15493f560274707a37574e2553fe19c8bd06b7d54d2ae38b9584a4a2242760d251f0a86d1

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

      Filesize

      19KB

      MD5

      cb1f3812ae27565870c79c71b986ec6d

      SHA1

      e8989000132831cc47cb75fd81e45556fbf8984b

      SHA256

      7850cba5cac6525756556c8a23f55289e9b35faa2403ae70954d6ca1b6bbe713

      SHA512

      7b534aff64540f5cc42a771ecf04079b706f100498c2ac4f2ed211a1f2c4d4d43ce5011135593ceea94489f83fcf453a02d783be78b3e1204e8fa6ff5350be33

    • C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

      Filesize

      19KB

      MD5

      502d4596b7ee940b22c0ff2bf344d518

      SHA1

      588a4ec0de1c764c7443fb023d8b9eb6c326fbf0

      SHA256

      c241a2e2edb8c60431f19d575a4c1889f0237396b027bc9872279f179995abc9

      SHA512

      9c37c4280d6fcd6079311ed0830d1b976f4a45fe506696e751a7f5e6ee8eda3bf1325aea966a2dcca6fcb733eaf2a870b093523b139d9eb3d3f2e28f94d5f3e9

    • C:\Windows\rss\csrss.exe

      Filesize

      4.1MB

      MD5

      0473ef4659547c66339a72d00c0655a8

      SHA1

      de0801690033096c5a87bfec4315a395d8bc59bd

      SHA256

      31a25019889dd75ec99f4c5efbc753a0438279b96ef6dbdbb309018cf7926fa3

      SHA512

      e0a41cd04df88918e08545d26f9214e3036e09048da6024097e5cdce40a386285d418de04ab4a40fcbd9a47ec1a06168245950000205180e09b08ee8729e8549

    • memory/1224-226-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-208-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-211-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-214-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-217-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-220-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-223-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-154-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-229-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1224-150-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1484-1-0x0000000003480000-0x0000000003883000-memory.dmp

      Filesize

      4.0MB

    • memory/1484-51-0x0000000003480000-0x0000000003883000-memory.dmp

      Filesize

      4.0MB

    • memory/1484-53-0x0000000005030000-0x000000000591B000-memory.dmp

      Filesize

      8.9MB

    • memory/1484-50-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/1484-2-0x0000000005030000-0x000000000591B000-memory.dmp

      Filesize

      8.9MB

    • memory/1484-3-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/2120-191-0x0000000070290000-0x00000000705E7000-memory.dmp

      Filesize

      3.3MB

    • memory/2120-190-0x0000000070080000-0x00000000700CC000-memory.dmp

      Filesize

      304KB

    • memory/2120-180-0x00000000059F0000-0x0000000005D47000-memory.dmp

      Filesize

      3.3MB

    • memory/2248-62-0x0000000006450000-0x00000000067A7000-memory.dmp

      Filesize

      3.3MB

    • memory/2248-75-0x0000000007EC0000-0x0000000007ED5000-memory.dmp

      Filesize

      84KB

    • memory/2248-63-0x0000000070160000-0x00000000701AC000-memory.dmp

      Filesize

      304KB

    • memory/2248-64-0x00000000702E0000-0x0000000070637000-memory.dmp

      Filesize

      3.3MB

    • memory/2248-73-0x0000000007B50000-0x0000000007BF4000-memory.dmp

      Filesize

      656KB

    • memory/2248-74-0x0000000007E70000-0x0000000007E81000-memory.dmp

      Filesize

      68KB

    • memory/2444-87-0x0000000005DE0000-0x0000000006137000-memory.dmp

      Filesize

      3.3MB

    • memory/2444-90-0x0000000070350000-0x00000000706A7000-memory.dmp

      Filesize

      3.3MB

    • memory/2444-89-0x0000000070160000-0x00000000701AC000-memory.dmp

      Filesize

      304KB

    • memory/2512-112-0x00000000703B0000-0x0000000070707000-memory.dmp

      Filesize

      3.3MB

    • memory/2512-111-0x0000000070160000-0x00000000701AC000-memory.dmp

      Filesize

      304KB

    • memory/3260-163-0x0000000005970000-0x0000000005CC7000-memory.dmp

      Filesize

      3.3MB

    • memory/3260-178-0x00000000057F0000-0x0000000005805000-memory.dmp

      Filesize

      84KB

    • memory/3260-177-0x0000000007420000-0x0000000007431000-memory.dmp

      Filesize

      68KB

    • memory/3260-176-0x0000000006EB0000-0x0000000006F54000-memory.dmp

      Filesize

      656KB

    • memory/3260-166-0x0000000070080000-0x00000000700CC000-memory.dmp

      Filesize

      304KB

    • memory/3260-167-0x0000000070200000-0x0000000070557000-memory.dmp

      Filesize

      3.3MB

    • memory/3260-165-0x0000000005EC0000-0x0000000005F0C000-memory.dmp

      Filesize

      304KB

    • memory/3632-128-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/3632-100-0x0000000000400000-0x0000000002ED3000-memory.dmp

      Filesize

      42.8MB

    • memory/4260-37-0x0000000007820000-0x0000000007E9A000-memory.dmp

      Filesize

      6.5MB

    • memory/4260-45-0x0000000007380000-0x0000000007388000-memory.dmp

      Filesize

      32KB

    • memory/4260-39-0x0000000007220000-0x000000000722A000-memory.dmp

      Filesize

      40KB

    • memory/4260-38-0x00000000071E0000-0x00000000071FA000-memory.dmp

      Filesize

      104KB

    • memory/4260-4-0x00000000047C0000-0x00000000047F6000-memory.dmp

      Filesize

      216KB

    • memory/4260-5-0x0000000073EF0000-0x00000000746A1000-memory.dmp

      Filesize

      7.7MB

    • memory/4260-36-0x00000000070B0000-0x0000000007154000-memory.dmp

      Filesize

      656KB

    • memory/4260-35-0x0000000007090000-0x00000000070AE000-memory.dmp

      Filesize

      120KB

    • memory/4260-25-0x0000000070160000-0x00000000701AC000-memory.dmp

      Filesize

      304KB

    • memory/4260-26-0x00000000703B0000-0x0000000070707000-memory.dmp

      Filesize

      3.3MB

    • memory/4260-40-0x00000000072E0000-0x0000000007376000-memory.dmp

      Filesize

      600KB

    • memory/4260-41-0x0000000007250000-0x0000000007261000-memory.dmp

      Filesize

      68KB

    • memory/4260-42-0x0000000007290000-0x000000000729E000-memory.dmp

      Filesize

      56KB

    • memory/4260-43-0x00000000072A0000-0x00000000072B5000-memory.dmp

      Filesize

      84KB

    • memory/4260-44-0x00000000073A0000-0x00000000073BA000-memory.dmp

      Filesize

      104KB

    • memory/4260-48-0x0000000073EF0000-0x00000000746A1000-memory.dmp

      Filesize

      7.7MB

    • memory/4260-24-0x0000000007030000-0x0000000007064000-memory.dmp

      Filesize

      208KB

    • memory/4260-23-0x0000000006DB0000-0x0000000006DF6000-memory.dmp

      Filesize

      280KB

    • memory/4260-22-0x0000000005CC0000-0x0000000005D0C000-memory.dmp

      Filesize

      304KB

    • memory/4260-21-0x0000000005C40000-0x0000000005C5E000-memory.dmp

      Filesize

      120KB

    • memory/4260-12-0x0000000005780000-0x0000000005AD7000-memory.dmp

      Filesize

      3.3MB

    • memory/4260-11-0x0000000005710000-0x0000000005776000-memory.dmp

      Filesize

      408KB

    • memory/4260-10-0x00000000055B0000-0x0000000005616000-memory.dmp

      Filesize

      408KB

    • memory/4260-9-0x0000000004DA0000-0x0000000004DC2000-memory.dmp

      Filesize

      136KB

    • memory/4260-8-0x0000000004F10000-0x000000000553A000-memory.dmp

      Filesize

      6.2MB

    • memory/4260-6-0x00000000048D0000-0x00000000048E0000-memory.dmp

      Filesize

      64KB

    • memory/4260-7-0x00000000048D0000-0x00000000048E0000-memory.dmp

      Filesize

      64KB

    • memory/4828-141-0x00000000702E0000-0x0000000070637000-memory.dmp

      Filesize

      3.3MB

    • memory/4828-140-0x0000000070160000-0x00000000701AC000-memory.dmp

      Filesize

      304KB