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Analysis

  • max time kernel
    92s
  • max time network
    93s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 23:24

General

  • Target

    2024-05-28_3d92a5ba0510fa666565200a3d7f8c4f_destroyer_wannacry.exe

  • Size

    37KB

  • MD5

    3d92a5ba0510fa666565200a3d7f8c4f

  • SHA1

    a1003312ef89abe43028f4c466e3017a461fe7eb

  • SHA256

    a73988ddd7012dbea460e6afe763dfc87fa788784301db187b6bc832a1b90b3e

  • SHA512

    b79b58048f019bcfee19c36d3368deba30d8088f22b107bd69f107e8647fc6db1a7174cfdb4c6cd4f16c2dee1a0c879ba8b7b675dfcd97afbb38276c17053787

  • SSDEEP

    768:3qo2ZK/hpktD8Hr92rda445lTtG/lpuBYXf3oZQEqj3mIgTeM:6o2Ze8D8Hr96da445xYlwBYgqEq7mqM

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Detects command variations typically used by ransomware 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 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).

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 45 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-28_3d92a5ba0510fa666565200a3d7f8c4f_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_3d92a5ba0510fa666565200a3d7f8c4f_destroyer_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:972
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • 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:4532
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:4076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    37KB

    MD5

    3d92a5ba0510fa666565200a3d7f8c4f

    SHA1

    a1003312ef89abe43028f4c466e3017a461fe7eb

    SHA256

    a73988ddd7012dbea460e6afe763dfc87fa788784301db187b6bc832a1b90b3e

    SHA512

    b79b58048f019bcfee19c36d3368deba30d8088f22b107bd69f107e8647fc6db1a7174cfdb4c6cd4f16c2dee1a0c879ba8b7b675dfcd97afbb38276c17053787

  • C:\Users\Admin\Documents\read_it.txt

    Filesize

    55B

    MD5

    9e386839f70884f23dcd6136d874936c

    SHA1

    d826c660bee396d0f57de94ec64b1987410a430a

    SHA256

    94b9c14b329bb25f9b3a334434de85668f8e520fa4d2955be6d534ee7c7d05f0

    SHA512

    c907b78f4ee4b07f7e712913e160cdd6b2da6dc63666cc12a416b85a67df194f1b9f20253edc88701f36d9198db34e4c25fb74369666e3fa532de3e92cf5668f

  • memory/972-1-0x00007FFCDBC03000-0x00007FFCDBC05000-memory.dmp

    Filesize

    8KB

  • memory/972-0-0x0000000000BF0000-0x0000000000C00000-memory.dmp

    Filesize

    64KB

  • memory/4532-14-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

    Filesize

    10.8MB

  • memory/4532-413-0x00007FFCDBC00000-0x00007FFCDC6C1000-memory.dmp

    Filesize

    10.8MB