Analysis

  • max time kernel
    120s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-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
  • 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).

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 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\2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-08-24_4470af286c52fe4f7899d46de8428018_wannacry_JC.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2808
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • 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:2672
      • 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:2440
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2492
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1180
      • 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:2784
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2764
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:584
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2444
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2068
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\you like cock.txt
        3⤵
          PID:2448
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2468
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2392
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1932
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:1968

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

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

                Filesize

                10B

                MD5

                8328a6078be1aa0f76d4e57be2189c39

                SHA1

                2cf09192be4716e74fcecfa0673e842b2e74dff6

                SHA256

                d2a3ba085304c3b342d3df1ad51e0e1cd7b50f3918a0970f64e45c6fd1c68fac

                SHA512

                cf7cc6494c7df08c585665fd062521dd26280efc922889cdaaf23c06c019688bca8d7a03cb56f1f67d6cf616b7c39b0e31484db16c8f1e588beee8f90acdf335

              • 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\Start Menu\Programs\Accessories\Notepad.lnk

                Filesize

                1B

                MD5

                d1457b72c3fb323a2671125aef3eab5d

                SHA1

                5bab61eb53176449e25c2c82f172b82cb13ffb9d

                SHA256

                8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

                SHA512

                ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

              • memory/2672-8-0x0000000000060000-0x0000000000086000-memory.dmp

                Filesize

                152KB

              • memory/2672-11-0x0000000002110000-0x0000000002190000-memory.dmp

                Filesize

                512KB

              • memory/2672-10-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

                Filesize

                9.9MB

              • memory/2672-247-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

                Filesize

                9.9MB

              • memory/2808-2-0x0000000000D00000-0x0000000000D80000-memory.dmp

                Filesize

                512KB

              • memory/2808-0-0x00000000011E0000-0x0000000001206000-memory.dmp

                Filesize

                152KB

              • memory/2808-9-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

                Filesize

                9.9MB

              • memory/2808-1-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

                Filesize

                9.9MB