Analysis

  • max time kernel
    155s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-03-2024 10:42

General

  • Target

    2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe

  • Size

    1.1MB

  • MD5

    619fc98c120d10c8b5be2215153d4b46

  • SHA1

    72cec945d3e057ee27e9ff2b6ede6ac8ca127eb5

  • SHA256

    7267439752d21c7856257c4a766b10d9d49301ee7207390d57025d1071bb080f

  • SHA512

    c443c07685c63c2e9c2ef025e6ba6b4b49679acd8ee2c27fddc305e6d08182cd6647ae4b590b00d1f9c90792dcf8d5906ce3fcfa3aedb775559c29fb6e4728a9

  • SSDEEP

    12288:yBo9M904nKzuJpWissPWYkeRLSyXd8R84sZKIhwiGXIVmgf//9b31q3C/NwHGlLi:D9TaXk89Lgwd/RlNzS6XB

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 3 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 3 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (162) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • 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
  • 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.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 50 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 18 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\2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4068
    • C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe
      "C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1664
      • 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:3724
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1708
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:432
      • 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:5096
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3612
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1692
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1360
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4736
      • 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:5528
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4136 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2432
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3656
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4404
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:4640
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:2940

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\3D Objects\read_it.txt

        Filesize

        361B

        MD5

        f20c9e44f4ebffc60633fdda598d46df

        SHA1

        603231bca4cb23c096e8a9517cd62d4d1b7d087e

        SHA256

        c6f95cdd7ab574f945f41309157e15012a29fb998281a23c4edd378584625f10

        SHA512

        4446bec8f45f2251a927fae44304ecc47587f31c774ee0701090b5366c6aa3ce0197acbe52453d6348fc7e088bc62fe90e483e05847f8b6ba325849bc4c3abd5

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe.log

        Filesize

        1KB

        MD5

        baf55b95da4a601229647f25dad12878

        SHA1

        abc16954ebfd213733c4493fc1910164d825cac8

        SHA256

        ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

        SHA512

        24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

      • C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe

        Filesize

        89KB

        MD5

        0fb57bcd76bab482a24e0968e7b27968

        SHA1

        800b817d9c1e4f03643f75c7b8d7e3c53d78a34e

        SHA256

        ad685ddbba928c1979c7edab398fab4b4e9964b87c2178389c7b0f16b77d9d51

        SHA512

        5ecf5988407595bae7597e3b4eb1752c4eb65849d7bace244dbd1cb3a305aca3f8b4b9c9f4c20967e2b88917cbb4fd8ecc600a9838557809ab82cdfdbaecf04b

      • C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe

        Filesize

        1.1MB

        MD5

        619fc98c120d10c8b5be2215153d4b46

        SHA1

        72cec945d3e057ee27e9ff2b6ede6ac8ca127eb5

        SHA256

        7267439752d21c7856257c4a766b10d9d49301ee7207390d57025d1071bb080f

        SHA512

        c443c07685c63c2e9c2ef025e6ba6b4b49679acd8ee2c27fddc305e6d08182cd6647ae4b590b00d1f9c90792dcf8d5906ce3fcfa3aedb775559c29fb6e4728a9

      • C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\Window Switcher.lnk

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1664-17-0x00007FFED75A0000-0x00007FFED8061000-memory.dmp

        Filesize

        10.8MB

      • memory/1664-18-0x0000000002370000-0x0000000002380000-memory.dmp

        Filesize

        64KB

      • memory/4068-3-0x00007FFED75A0000-0x00007FFED8061000-memory.dmp

        Filesize

        10.8MB

      • memory/4068-4-0x000000001B200000-0x000000001B210000-memory.dmp

        Filesize

        64KB

      • memory/4068-19-0x00007FFED75A0000-0x00007FFED8061000-memory.dmp

        Filesize

        10.8MB

      • memory/4068-0-0x0000000000550000-0x0000000000666000-memory.dmp

        Filesize

        1.1MB

      • memory/4068-2-0x000000001B200000-0x000000001B210000-memory.dmp

        Filesize

        64KB

      • memory/4068-1-0x00007FFED75A0000-0x00007FFED8061000-memory.dmp

        Filesize

        10.8MB