Analysis

  • max time kernel
    184s
  • max time network
    302s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250210-en
  • resource tags

    arch:x64arch:x86image:win11-20250210-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10-02-2025 22:09

General

  • Target

    aggresive ransomware.exe

  • Size

    274KB

  • MD5

    a1312968ec68e2fd87b0a4652dba511a

  • SHA1

    153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1

  • SHA256

    773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0

  • SHA512

    b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623

  • SSDEEP

    6144:gr9i0ME2RQVQW4cGl8yK7dJ+/UIPzHgv26UT8:e92RQVQW4cGl8y2T+/BPzAv26UT8

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Chaos family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Downloads MZ/PE file 1 IoCs
  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 34 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 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 1 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

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

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 45 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\aggresive ransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\aggresive ransomware.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:916
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4468
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3260
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:652
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2556
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2072
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:440
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1392
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4680
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2728
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read me .txt
        3⤵
          PID:636
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3092
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1424
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:3256
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:3980
      • C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
        "C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PG9lbSBwcm9kdWN0X21hbnVmYWN0dXJlcj0iIiBwcm9kdWN0X25hbWU9IiIvPjxleHAgZXRhZz0iJnF1b3Q7RSt4YkF6Nlk2c1UxMjg5YlM2cWw0VlJMYmtqZkJVR1RNSnNqckhyNDRpST0mcXVvdDsiLz48YXBwIGFwcGlkPSJ7OEE2OUQzNDUtRDU2NC00NjNjLUFGRjEtQTY5RDlFNTMwRjk2fSIgdmVyc2lvbj0iMTIzLjAuNjMxMi4xMjMiIG5leHR2ZXJzaW9uPSIiIGxhbmc9ImVuIiBicmFuZD0iR0dMUyIgY2xpZW50PSIiIGluc3RhbGxhZ2U9IjAiIGluc3RhbGxkYXRldGltZT0iMTczOTE4NDcxMiIgb29iZV9pbnN0YWxsX3RpbWU9IjEzMzgzNjU1NjY2MDQzMDAwMCI-PGV2ZW50IGV2ZW50dHlwZT0iMzEiIGV2ZW50cmVzdWx0PSIxIiBlcnJvcmNvZGU9IjAiIGV4dHJhY29kZTE9IjIxNzk4NjIiIHN5c3RlbV91cHRpbWVfdGlja3M9IjUzMjQ1MjEyNzciLz48L2FwcD48L3JlcXVlc3Q-
        1⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        PID:2624

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\svchost.exe

        Filesize

        274KB

        MD5

        a1312968ec68e2fd87b0a4652dba511a

        SHA1

        153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1

        SHA256

        773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0

        SHA512

        b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623

      • C:\Users\Admin\Desktop\read me .txt

        Filesize

        102B

        MD5

        8e826995a13a95c73983e901afdf3597

        SHA1

        8b79ca70e0ff0ff3ac538c9d55279760f6656bfa

        SHA256

        b0a0c6c1adaa391936d55042d9904caa366d28d491823338be19cef580f5820d

        SHA512

        bc4ba9229c8a34660db17ff0acd0bac06c587f4ad1c399f06748a3357d21b763bbdeec1792e7f36766c0ee043abd018f76319659fb0c5b40de82e834548d333b

      • memory/916-0-0x00007FF8D4163000-0x00007FF8D4165000-memory.dmp

        Filesize

        8KB

      • memory/916-1-0x0000000000F20000-0x0000000000F6A000-memory.dmp

        Filesize

        296KB

      • memory/3092-76-0x00007FF8F4E40000-0x00007FF8F4E69000-memory.dmp

        Filesize

        164KB

      • memory/4468-14-0x00007FF8D4160000-0x00007FF8D4C22000-memory.dmp

        Filesize

        10.8MB

      • memory/4468-73-0x00007FF8D4160000-0x00007FF8D4C22000-memory.dmp

        Filesize

        10.8MB