Analysis

  • max time kernel
    117s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    28-07-2024 07:23

General

  • Target

    2024-07-28_664147001ab4d76f6de68a5112e16aea_wannacry.exe

  • Size

    4.3MB

  • MD5

    664147001ab4d76f6de68a5112e16aea

  • SHA1

    7fde25b1bf73a53bc531f67974980b01168c50dd

  • SHA256

    c6900895311a8bbcdbc36821e05112f7effba6eaa768526ab0c941c7041f071e

  • SHA512

    f249440c418eaa3ad061f64e4048203427549a55f06e00411169d93de8ca3dcab433b9fb9dd09240b7f1db9396a82e92dceb37bfdfe465be4fbc51c07df20def

  • SSDEEP

    49152:wNbV9T1iQXYMP39qD3nB9kbIImcF7vTZJnP:w

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • 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.

  • Disables Task Manager via registry modification
  • 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) 64 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).

  • Interacts with shadow copies 3 TTPs 1 IoCs

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

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 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.

  • 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\2024-07-28_664147001ab4d76f6de68a5112e16aea_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-07-28_664147001ab4d76f6de68a5112e16aea_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:840
    • 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
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2936
      • 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:2848
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2216
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1660
      • 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:1656
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:552
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:632
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1332
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2876
      • 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:2260
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2844
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2888
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1860
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1612

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt

        Filesize

        1KB

        MD5

        bf54072ed2480bda0ea3a33b306f555c

        SHA1

        e1ba6be8ce8c3c4160d50d774bd2c25875bf49e8

        SHA256

        26c008ce186c123786da2f02535b7368f7a4260b1334230bbe9e8ace8b2978b2

        SHA512

        637f850cc3388d0c87d91e428122dc74366027a68e7f3b24d41b80a52914b4e076904d5d7fd4b26ee0e24d03ac5e6c0c1cb5b62d04be325aed23274646b174a8

      • C:\Users\Admin\AppData\Roaming\LimitWatch.zip

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

        Filesize

        4.3MB

        MD5

        664147001ab4d76f6de68a5112e16aea

        SHA1

        7fde25b1bf73a53bc531f67974980b01168c50dd

        SHA256

        c6900895311a8bbcdbc36821e05112f7effba6eaa768526ab0c941c7041f071e

        SHA512

        f249440c418eaa3ad061f64e4048203427549a55f06e00411169d93de8ca3dcab433b9fb9dd09240b7f1db9396a82e92dceb37bfdfe465be4fbc51c07df20def

      • memory/840-0-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

        Filesize

        4KB

      • memory/840-1-0x0000000000EB0000-0x0000000001300000-memory.dmp

        Filesize

        4.3MB

      • memory/2936-7-0x0000000000380000-0x00000000007D0000-memory.dmp

        Filesize

        4.3MB

      • memory/2936-9-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

        Filesize

        9.9MB

      • memory/2936-72-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

        Filesize

        9.9MB

      • memory/2936-955-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

        Filesize

        9.9MB

      • memory/2936-989-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

        Filesize

        9.9MB