Analysis

  • max time kernel
    149s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251015-en
  • resource tags

    arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    20/10/2025, 08:44

General

  • Target
    PO 5465TYYU625.xlsx.exe
  • Size 755KB
  • Sample251020-knbqdae17e
  • SHA256 f9926b77fd47dffc66e6f22e4ecd4d0f1b1b3e4b768064bb22b64be3094569f6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Formbook family
  • Formbook payload 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • SmartAssembly .NET packer 1 IoCs

    Detects SmartAssembly .NET packer.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies system certificate store 2 TTPs 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5720
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1772
    • C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe
      "C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe"
      2⤵
        PID:5148
      • C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe
        "C:\Users\Admin\AppData\Local\Temp\PO 5465TYYU625.xlsx.exe"
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:5492

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          __PSScriptPolicyTest_agcm1stk.1hy.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_agcm1stk.1hy.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          memory/1772-47-0x0000000007970000-0x0000000007FEA000-memory.dmp

          memory/1772-34-0x0000000006020000-0x000000000606C000-memory.dmp

          memory/1772-55-0x0000000007670000-0x0000000007678000-memory.dmp

          memory/1772-54-0x0000000007680000-0x000000000769A000-memory.dmp

          memory/1772-53-0x0000000007580000-0x0000000007595000-memory.dmp

          memory/1772-52-0x0000000007570000-0x000000000757E000-memory.dmp

          memory/1772-51-0x0000000007540000-0x0000000007551000-memory.dmp

          memory/1772-50-0x00000000075C0000-0x0000000007656000-memory.dmp

          memory/1772-49-0x00000000073B0000-0x00000000073BA000-memory.dmp

          memory/1772-36-0x00000000065B0000-0x00000000065E4000-memory.dmp

          memory/1772-21-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

          memory/1772-20-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

          memory/1772-22-0x0000000005400000-0x0000000005A2A000-memory.dmp

          memory/1772-24-0x0000000005A30000-0x0000000005A96000-memory.dmp

          memory/1772-23-0x0000000005340000-0x0000000005362000-memory.dmp

          memory/1772-25-0x0000000005AA0000-0x0000000005B06000-memory.dmp

          memory/1772-48-0x0000000007330000-0x000000000734A000-memory.dmp

          memory/1772-32-0x0000000005B10000-0x0000000005E67000-memory.dmp

          memory/1772-37-0x0000000070A10000-0x0000000070A5C000-memory.dmp

          memory/1772-33-0x0000000005FD0000-0x0000000005FEE000-memory.dmp

          memory/1772-19-0x00000000027E0000-0x0000000002816000-memory.dmp

          memory/1772-45-0x00000000071A0000-0x00000000071BE000-memory.dmp

          memory/1772-44-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

          memory/1772-35-0x000000007FE10000-0x000000007FE20000-memory.dmp

          memory/1772-46-0x00000000071D0000-0x0000000007274000-memory.dmp

          memory/5492-59-0x0000000001950000-0x0000000001CA6000-memory.dmp

          memory/5492-17-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/5492-58-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/5492-60-0x0000000000400000-0x0000000000448000-memory.dmp

          memory/5720-0-0x0000000000E80000-0x0000000000F3E000-memory.dmp

          memory/5720-1-0x00000000060F0000-0x0000000006696000-memory.dmp

          memory/5720-16-0x00000000071A0000-0x0000000007232000-memory.dmp

          memory/5720-5-0x0000000005D20000-0x0000000005DBC000-memory.dmp

          memory/5720-15-0x00000000059A0000-0x00000000059B0000-memory.dmp

          memory/5720-2-0x0000000005A10000-0x0000000005AA2000-memory.dmp

          memory/5720-4-0x00000000059E0000-0x00000000059EA000-memory.dmp

          memory/5720-3-0x00000000059A0000-0x00000000059B0000-memory.dmp

          memory/5720-14-0x0000000006A50000-0x0000000006A66000-memory.dmp