Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    15/04/2024, 12:37

General

  • Target

    41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3.exe

  • Size

    4.2MB

  • MD5

    5a116703581878f4e298551a62cae904

  • SHA1

    2dff27302ed1b1996f5722f7d56655ed44350982

  • SHA256

    41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3

  • SHA512

    193199fb70f5ba8ca47c14da1406dfbc6f20fc74708a2c0220a40c2955491051d6b90d7639ddeff670538757ef1000c24595f1c0eb533cafbe8ee1f559414a1c

  • SSDEEP

    98304:m3vZTnjS5GCKvA/oSgOrUma7UiV1QsRLti3SkD:2ZTnjSw8A2VCUio4LxS

Malware Config

Signatures

  • Glupteba

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

  • Glupteba payload 20 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\41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3.exe
    "C:\Users\Admin\AppData\Local\Temp\41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2740
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:808
    • C:\Users\Admin\AppData\Local\Temp\41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3.exe
      "C:\Users\Admin\AppData\Local\Temp\41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3.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:3448
      • 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:4044
      • 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:4708
        • 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:3984
      • 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:4540
      • 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:1772
      • 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:4772
        • 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:2012
        • 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:1624
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:4524
          • 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:5056
          • 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:1576
          • 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:2268
          • 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:1264

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2d3abtze.y4f.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

      9b3129e39eb84e591183c3d89f98f7e5

      SHA1

      647e793a9dafbfc0dd864ed550005f9065cf803f

      SHA256

      1be8a8ce4efe5810233627cf27ea30836a128d897de3085f1cf061535fe5e833

      SHA512

      c00800fbc6d73ade0380fbe4d69d39b62792f727f3b11201f2ff180d6ef9b21d99d993aa7801656f02b2865396a580bee8075cd1fa21d0d655d0d20f92961c13

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

      Filesize

      19KB

      MD5

      a696d1d32d136aa3a8b714080a5bc193

      SHA1

      3cc15bbff04a1cec301169e6603f776518560795

      SHA256

      c80380b0081affc8bff01f8a0ddb1b1b9693613a5b1b39f9c1fa8b9ce8edb2fa

      SHA512

      8721751358b86f52b635924ba08f053e314e8cc8ead9975b604800d5960bab8da85835d81b4849d93ed48ced3cc79462cb97492acb700efa6d2b2407c3f85d4b

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

      Filesize

      19KB

      MD5

      0a09a757c1ee5fe016608a65f187e61f

      SHA1

      409dc5c13918f806d62aaad96ed2b5e1c3c1b36a

      SHA256

      a58c411fd88510eac0aa2fb90bcf12b80768b5981130be59e11eae6525cabf11

      SHA512

      3a67cf74579f9c107d13930fa8e4e3b8b21e2e67c4252ee1ebc6e5f8df9b32b2d438479e48ec04fa933f25a8c0bc21d5aa1c11fe5d751a4519d692f10c009fe5

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

      Filesize

      19KB

      MD5

      91fa91ad73fc1976229328b3c3500961

      SHA1

      c8d4a71452ce03e87fe5689d305c16dd9bb8e9c5

      SHA256

      bc640434c0225d917eb4ecde9affb49cba35e635dff524b9fc11ae3b8f89ef4a

      SHA512

      e353ca0c4ab2803c024e5f9fd326363322412f360c5caeaf7a4244dc2a7fbc2e2414d575f33c7945ac77f083b94b165aa4a394f00c2c88eaf70447f6b005638f

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

      Filesize

      19KB

      MD5

      780523c6aebcff2826e8707418899462

      SHA1

      9e1e240519ea141e6113c261ada1a875c3bad84a

      SHA256

      6974a88589cf64d9f74befc310a6affdba6fda8a58d6d8f53698b904a2cea3b6

      SHA512

      d4ec79967e297649dbdfef2c4dc8a137ecc41329f22303f7bc6975fa418e2f222a77cb329b549b570fed35268238f8a24dc536947965da262072af9ba80796b7

    • C:\Windows\rss\csrss.exe

      Filesize

      4.2MB

      MD5

      5a116703581878f4e298551a62cae904

      SHA1

      2dff27302ed1b1996f5722f7d56655ed44350982

      SHA256

      41d99ac84eb2e08ab1d39e25ca1e89f363f8e8817be40e21073b99ca254b57f3

      SHA512

      193199fb70f5ba8ca47c14da1406dfbc6f20fc74708a2c0220a40c2955491051d6b90d7639ddeff670538757ef1000c24595f1c0eb533cafbe8ee1f559414a1c

    • memory/808-44-0x00000000077B0000-0x00000000077BE000-memory.dmp

      Filesize

      56KB

    • memory/808-48-0x0000000007830000-0x0000000007838000-memory.dmp

      Filesize

      32KB

    • memory/808-10-0x0000000005450000-0x00000000054B6000-memory.dmp

      Filesize

      408KB

    • memory/808-17-0x0000000005C00000-0x0000000005F57000-memory.dmp

      Filesize

      3.3MB

    • memory/808-21-0x0000000006170000-0x000000000618E000-memory.dmp

      Filesize

      120KB

    • memory/808-22-0x0000000006200000-0x000000000624C000-memory.dmp

      Filesize

      304KB

    • memory/808-23-0x0000000006580000-0x00000000065C6000-memory.dmp

      Filesize

      280KB

    • memory/808-24-0x0000000004F90000-0x0000000004FA0000-memory.dmp

      Filesize

      64KB

    • memory/808-26-0x000000007FB60000-0x000000007FB70000-memory.dmp

      Filesize

      64KB

    • memory/808-25-0x0000000007590000-0x00000000075C4000-memory.dmp

      Filesize

      208KB

    • memory/808-27-0x00000000703F0000-0x000000007043C000-memory.dmp

      Filesize

      304KB

    • memory/808-28-0x0000000070660000-0x00000000709B7000-memory.dmp

      Filesize

      3.3MB

    • memory/808-37-0x0000000007570000-0x000000000758E000-memory.dmp

      Filesize

      120KB

    • memory/808-38-0x00000000075D0000-0x0000000007674000-memory.dmp

      Filesize

      656KB

    • memory/808-39-0x0000000007D40000-0x00000000083BA000-memory.dmp

      Filesize

      6.5MB

    • memory/808-40-0x0000000007700000-0x000000000771A000-memory.dmp

      Filesize

      104KB

    • memory/808-41-0x0000000007740000-0x000000000774A000-memory.dmp

      Filesize

      40KB

    • memory/808-42-0x0000000007850000-0x00000000078E6000-memory.dmp

      Filesize

      600KB

    • memory/808-43-0x0000000007760000-0x0000000007771000-memory.dmp

      Filesize

      68KB

    • memory/808-9-0x00000000053B0000-0x00000000053D2000-memory.dmp

      Filesize

      136KB

    • memory/808-45-0x00000000077C0000-0x00000000077D5000-memory.dmp

      Filesize

      84KB

    • memory/808-46-0x0000000007810000-0x000000000782A000-memory.dmp

      Filesize

      104KB

    • memory/808-4-0x0000000002CA0000-0x0000000002CD6000-memory.dmp

      Filesize

      216KB

    • memory/808-11-0x00000000054C0000-0x0000000005526000-memory.dmp

      Filesize

      408KB

    • memory/808-51-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/808-5-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/808-6-0x0000000004F90000-0x0000000004FA0000-memory.dmp

      Filesize

      64KB

    • memory/808-7-0x0000000004F90000-0x0000000004FA0000-memory.dmp

      Filesize

      64KB

    • memory/808-8-0x00000000055D0000-0x0000000005BFA000-memory.dmp

      Filesize

      6.2MB

    • memory/1772-135-0x00000000703F0000-0x000000007043C000-memory.dmp

      Filesize

      304KB

    • memory/1772-121-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/1772-122-0x0000000004E10000-0x0000000004E20000-memory.dmp

      Filesize

      64KB

    • memory/1772-123-0x0000000004E10000-0x0000000004E20000-memory.dmp

      Filesize

      64KB

    • memory/1772-134-0x0000000004E10000-0x0000000004E20000-memory.dmp

      Filesize

      64KB

    • memory/2740-54-0x0000000004F70000-0x0000000005370000-memory.dmp

      Filesize

      4.0MB

    • memory/2740-3-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/2740-67-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/2740-47-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/2740-2-0x0000000005370000-0x0000000005C5B000-memory.dmp

      Filesize

      8.9MB

    • memory/2740-1-0x0000000004F70000-0x0000000005370000-memory.dmp

      Filesize

      4.0MB

    • memory/3448-71-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/3448-56-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/3448-53-0x0000000004E30000-0x0000000005235000-memory.dmp

      Filesize

      4.0MB

    • memory/3448-152-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/3448-55-0x0000000005240000-0x0000000005B2B000-memory.dmp

      Filesize

      8.9MB

    • memory/3448-120-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/3448-99-0x0000000004E30000-0x0000000005235000-memory.dmp

      Filesize

      4.0MB

    • memory/3448-116-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4044-68-0x0000000005A40000-0x0000000005D97000-memory.dmp

      Filesize

      3.3MB

    • memory/4044-85-0x00000000073A0000-0x00000000073B5000-memory.dmp

      Filesize

      84KB

    • memory/4044-57-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/4044-58-0x0000000002890000-0x00000000028A0000-memory.dmp

      Filesize

      64KB

    • memory/4044-69-0x0000000002890000-0x00000000028A0000-memory.dmp

      Filesize

      64KB

    • memory/4044-72-0x0000000002890000-0x00000000028A0000-memory.dmp

      Filesize

      64KB

    • memory/4044-73-0x00000000703F0000-0x000000007043C000-memory.dmp

      Filesize

      304KB

    • memory/4044-74-0x0000000070570000-0x00000000708C7000-memory.dmp

      Filesize

      3.3MB

    • memory/4044-83-0x0000000007040000-0x00000000070E4000-memory.dmp

      Filesize

      656KB

    • memory/4044-84-0x0000000007350000-0x0000000007361000-memory.dmp

      Filesize

      68KB

    • memory/4044-88-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/4540-92-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

      Filesize

      64KB

    • memory/4540-106-0x00000000703F0000-0x000000007043C000-memory.dmp

      Filesize

      304KB

    • memory/4540-105-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

      Filesize

      64KB

    • memory/4540-93-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

      Filesize

      64KB

    • memory/4540-119-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/4540-117-0x000000007F6A0000-0x000000007F6B0000-memory.dmp

      Filesize

      64KB

    • memory/4540-100-0x0000000005EE0000-0x0000000006237000-memory.dmp

      Filesize

      3.3MB

    • memory/4540-91-0x0000000074180000-0x0000000074931000-memory.dmp

      Filesize

      7.7MB

    • memory/4540-107-0x0000000070600000-0x0000000070957000-memory.dmp

      Filesize

      3.3MB

    • memory/4772-196-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-250-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-253-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-256-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-259-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-262-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-265-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-268-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-271-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB

    • memory/4772-274-0x0000000000400000-0x000000000310F000-memory.dmp

      Filesize

      45.1MB