Overview

overview

10

Static

static

7

ldr_37Q9.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    50s
  • max time network
    23s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 21:56

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General

  • Target

    ldr_37Q9.exe

  • Size

    22.8MB

  • MD5

    f775faca16d1b2838c5791143b8922df

  • SHA1

    458cda4c1ac20baef0b78e1e825db67208375cb4

  • SHA256

    7e2d0dde21a16920961db184e4b6e8a7c9632ab648bb64c0121d995181f385cf

  • SHA512

    15743e0d941684897c4703b1738aeb6cdb8e25f9a1cd529d82828f85d9efb37a111581d25db27464c89ad1bb99e043dea143448614077c306b0b98ae1fa77bae

  • SSDEEP

    393216:MUfnewiuTWW//yUcTCCnfk5M60cr0zCLRUJhmeA71q983HgROYx5OJ5b:MGnFlWW/u1nMn0cr0zI1qy3HgROHJt

Score
10/10
evasionpersistencethemidatrojan

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
    evasion
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 6 IoCs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 12 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 2 IoCs
  • Themida packer 16 IoCs

    Detects Themida, an advanced Windows software protection system.

    themida
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
    evasiontrojan
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 2 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 4 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ldr_37Q9.exe
    "C:\Users\Admin\AppData\Local\Temp\ldr_37Q9.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1448
    • \??\c:\users\admin\appdata\local\temp\ldr_37q9.exe 
      c:\users\admin\appdata\local\temp\ldr_37q9.exe 
      2⤵
      • Looks for VMWare Tools registry key
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Suspicious use of WriteProcessMemory
      PID:1740
      • C:\Users\Admin\AppData\Local\Temp\ldr_PjOE.exe
        "ldr_PjOE.exe" "c:\users\admin\appdata\local\temp\ldr_37q9.exe "
        3⤵
        • Looks for VMWare Tools registry key
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks for VirtualBox DLLs, possible anti-VM trick
        PID:3200
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3688
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in System32 directory
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Windows directory
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5024
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Drops file in Windows directory
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4984
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Adds Run key to start application
            • Checks whether UAC is enabled
            • Drops file in System32 directory
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4316
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Identifies VirtualBox via ACPI registry values (likely anti-VM)
              • Checks BIOS information in registry
              • Executes dropped EXE
              • Checks whether UAC is enabled
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious use of SetWindowsHookEx
              PID:4916
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2572

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
    Filesize

    10KB

    MD5

    df46eb1fe5d54a0521d9965203a4a9da

    SHA1

    e977aae1bb82f3d57267ead3b91df3d82d6d50c6

    SHA256

    6076a9ea8f52f5ad109fbe29f955ee052f626b22ee45366bfa83f70706744b1d

    SHA512

    5bc5f8d247ba164f1af6f4ae902906568a4e9baf05c9782d999e537730d8cfe443daac6f44aa246f27e9678237a4b57a7e8411e3c4fbe88e943525cdb2ae239e

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\ldr_37q9.exe 
    Filesize

    20.3MB

    MD5

    b0caecdef6da0e989fc5d545af92c8f2

    SHA1

    ad155c304a90781bdeaa4e82298a81602a469b86

    SHA256

    98a47a2151c6e3dc9a0d44aacf2681c022d2edb032a76c2a427ee41d99b44651

    SHA512

    535f59e26acfaf011baf8cb2462bb2e7156c9be6c4b9c8fe3074474158821047ac0135443e3c03b5a883c76f369402e27f2e643d7b44137a4553ad9128318794

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\ldr_PjOE.exe
    Filesize

    19.0MB

    MD5

    fd540d5d8315371f3e9a2012fe748f27

    SHA1

    9d5315512258da692709581ef4341eccdce21308

    SHA256

    8329f1f5752c277742bd5ac8307a33e7963e167e7eda61e47210c264ab78c24f

    SHA512

    fbb807273b1aa3db4c168b344d9c9899bac6859ab2e68f388367118e6b5e977cba045ffaba91e9288215ca04ce6a9b3dacc2fd41a2ad5edc2de3e78de72463c7

    Download Submit
  • C:\Windows\Resources\Themes\explorer.exe
    Filesize

    2.5MB

    MD5

    d4c793412dd24ff5cf0c33106929aefd

    SHA1

    d3d76e235dd976c0ac6563a52998431adff8f959

    SHA256

    13396a49857ffac0f9855e952eab9ef7091eea604222d78a78bab66b55265189

    SHA512

    eca15629d7e1a04f3516471788a6264fdf5b8245fdb121f6a1424c88d75bce4b965aa5331404c85741a500741febe7ef0a46e04b753562971ff9952ad2be2b6b

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  • C:\Windows\Resources\Themes\icsys.icn.exe
    Filesize

    2.5MB

    MD5

    b523ef40a4446533e23e153d02f873cb

    SHA1

    c1612e4a89791ad234d6de39cdb5db8df7167801

    SHA256

    7916937369a7266aa46a0a58258320a6764be18b745f08ab4356b8974abe63b9

    SHA512

    1941af9170687229b38a98c4a1cab9096a3b9409b027bca3e67a7cd158bde5dc2099f1c945fa1882ff1a1edb6ac50f49fbc61020334f7d2f4982734c6829435b

    Download Submit
  • C:\Windows\Resources\spoolsv.exe
    Filesize

    2.5MB

    MD5

    c92ec2b7c18e66be75cfb1d6f624de80

    SHA1

    46d8a6219b09f52b5e24461143860ed4e51990d5

    SHA256

    26d230d5ecfbcf5d04cf46725002958c662682240c63bf45762ff5b189ad12fa

    SHA512

    825c8b391b1f2e5a535b8245f7f74feabf600f42efd0ffdae2da2d77c96dfbb2cd9df1ebb9c661ff2c17084770b8d959bc6b19361c75b50bc05f0634975767da

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  • C:\Windows\Resources\svchost.exe
    Filesize

    2.5MB

    MD5

    6477082b716cdd2b2f18bbd680625fac

    SHA1

    0c574851ac441999daf8e54be5fd5af5962c67bd

    SHA256

    4a78f129a94ef9260afaf1fdc5fe8aab235a6acd0141e6fb7ff44672f68d450f

    SHA512

    9785e5f5402a9c7ef8136d992dcb7b5963e71a2cf280dd1cbba7c26dd848e7ddce4f80df52c8d6722c807972bd705e7548eef9ad2dda05168be0709da1741d63

    Download Submit
  • memory/1448-56-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/1448-0-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/1448-1-0x00000000773F6000-0x00000000773F8000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1740-58-0x00007FF62DB40000-0x00007FF62FE0E000-memory.dmp
    Filesize

    34.8MB

    Download
  • memory/1740-62-0x00007FF7DDCD0000-0x00007FF7DDCE0000-memory.dmp
    Filesize

    64KB

    Download
  • memory/1740-71-0x00007FF62DB40000-0x00007FF62FE0E000-memory.dmp
    Filesize

    34.8MB

    Download
  • memory/1740-57-0x00007FF81DE50000-0x00007FF81DE52000-memory.dmp
    Filesize

    8KB

    Download
  • memory/3200-76-0x00007FF632B30000-0x00007FF634BF2000-memory.dmp
    Filesize

    32.8MB

    Download
  • memory/3200-75-0x00007FF81DE50000-0x00007FF81DE52000-memory.dmp
    Filesize

    8KB

    Download
  • memory/3200-80-0x00007FF7DDCD0000-0x00007FF7DDCE0000-memory.dmp
    Filesize

    64KB

    Download
  • memory/3200-84-0x00007FF632B30000-0x00007FF634BF2000-memory.dmp
    Filesize

    32.8MB

    Download
  • memory/3200-97-0x00007FF632B30000-0x00007FF634BF2000-memory.dmp
    Filesize

    32.8MB

    Download
  • memory/3688-12-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/3688-54-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4316-67-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4316-40-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4916-50-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4916-45-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4984-52-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/4984-31-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/5024-22-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download
  • memory/5024-66-0x0000000000400000-0x0000000000A0E000-memory.dmp
    Filesize

    6.1MB

    Download