Analysis

  • max time kernel
    137s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230831-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/09/2023, 13:05

General

  • Target

    2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe

  • Size

    124KB

  • MD5

    4470af286c52fe4f7899d46de8428018

  • SHA1

    a99e8c7c1d6c76388809ec7d4e922f88b625f27e

  • SHA256

    c42defa8a483d463bee75bb42e7095cff43ca12d56d7e1ddd235b64221cceae4

  • SHA512

    c551112a10b1f48b61faa3e17de2d7b8aa2aefc9e9d5d40f44a797ebe7f0fa8cfa869866dc11a70c38e390be10358804ab8310261f973de7ed58db352b4f0510

  • SSDEEP

    1536:eN+one6zq9IQtnZd1p0VyBi9jhE9vrTnBgU4O4Fjhzum1/4xpNASl0OM8us3QC1L:/6zq9IaWyB4hEtWU74J86glk8Zva5S

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Deletes shadow copies 2 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
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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).

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

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 53 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\2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4780
    • 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
      • Adds Run key to start application
      • 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:4316
      • 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:3912
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1172
      • 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:4880
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3996
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1828
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4140
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4516
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\you like cock.txt
        3⤵
          PID:1728
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:456
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1596
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:3836
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:2404

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\3D Objects\you like cock.txt

              Filesize

              10B

              MD5

              8328a6078be1aa0f76d4e57be2189c39

              SHA1

              2cf09192be4716e74fcecfa0673e842b2e74dff6

              SHA256

              d2a3ba085304c3b342d3df1ad51e0e1cd7b50f3918a0970f64e45c6fd1c68fac

              SHA512

              cf7cc6494c7df08c585665fd062521dd26280efc922889cdaaf23c06c019688bca8d7a03cb56f1f67d6cf616b7c39b0e31484db16c8f1e588beee8f90acdf335

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe.log

              Filesize

              1KB

              MD5

              baf55b95da4a601229647f25dad12878

              SHA1

              abc16954ebfd213733c4493fc1910164d825cac8

              SHA256

              ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

              SHA512

              24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

              Filesize

              124KB

              MD5

              4470af286c52fe4f7899d46de8428018

              SHA1

              a99e8c7c1d6c76388809ec7d4e922f88b625f27e

              SHA256

              c42defa8a483d463bee75bb42e7095cff43ca12d56d7e1ddd235b64221cceae4

              SHA512

              c551112a10b1f48b61faa3e17de2d7b8aa2aefc9e9d5d40f44a797ebe7f0fa8cfa869866dc11a70c38e390be10358804ab8310261f973de7ed58db352b4f0510

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

              Filesize

              124KB

              MD5

              4470af286c52fe4f7899d46de8428018

              SHA1

              a99e8c7c1d6c76388809ec7d4e922f88b625f27e

              SHA256

              c42defa8a483d463bee75bb42e7095cff43ca12d56d7e1ddd235b64221cceae4

              SHA512

              c551112a10b1f48b61faa3e17de2d7b8aa2aefc9e9d5d40f44a797ebe7f0fa8cfa869866dc11a70c38e390be10358804ab8310261f973de7ed58db352b4f0510

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

              Filesize

              124KB

              MD5

              4470af286c52fe4f7899d46de8428018

              SHA1

              a99e8c7c1d6c76388809ec7d4e922f88b625f27e

              SHA256

              c42defa8a483d463bee75bb42e7095cff43ca12d56d7e1ddd235b64221cceae4

              SHA512

              c551112a10b1f48b61faa3e17de2d7b8aa2aefc9e9d5d40f44a797ebe7f0fa8cfa869866dc11a70c38e390be10358804ab8310261f973de7ed58db352b4f0510

            • C:\Users\Admin\AppData\Roaming\you like cock.txt

              Filesize

              10B

              MD5

              8328a6078be1aa0f76d4e57be2189c39

              SHA1

              2cf09192be4716e74fcecfa0673e842b2e74dff6

              SHA256

              d2a3ba085304c3b342d3df1ad51e0e1cd7b50f3918a0970f64e45c6fd1c68fac

              SHA512

              cf7cc6494c7df08c585665fd062521dd26280efc922889cdaaf23c06c019688bca8d7a03cb56f1f67d6cf616b7c39b0e31484db16c8f1e588beee8f90acdf335

            • C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Fax Recipient.lnk

              Filesize

              1B

              MD5

              d1457b72c3fb323a2671125aef3eab5d

              SHA1

              5bab61eb53176449e25c2c82f172b82cb13ffb9d

              SHA256

              8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

              SHA512

              ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

            • memory/4316-15-0x00007FF857BC0000-0x00007FF858681000-memory.dmp

              Filesize

              10.8MB

            • memory/4316-249-0x00007FF857BC0000-0x00007FF858681000-memory.dmp

              Filesize

              10.8MB

            • memory/4780-16-0x00007FF857BC0000-0x00007FF858681000-memory.dmp

              Filesize

              10.8MB

            • memory/4780-0-0x00000000002E0000-0x0000000000306000-memory.dmp

              Filesize

              152KB

            • memory/4780-2-0x000000001AEE0000-0x000000001AEF0000-memory.dmp

              Filesize

              64KB

            • memory/4780-1-0x00007FF857BC0000-0x00007FF858681000-memory.dmp

              Filesize

              10.8MB