Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-04-2024 22:34

General

  • Target

    2024-04-21_daf8e1d1c3778042cc92374eeba5af51_chaos_destroyer_wannacry.exe

  • Size

    24KB

  • MD5

    daf8e1d1c3778042cc92374eeba5af51

  • SHA1

    8b9f991cb7e290ef86eb0494c4ef7e14607240ee

  • SHA256

    83ebe9ac38941dfecead0c664b3517032ce8258f240f67699a6424290871cdee

  • SHA512

    cc744eb077f4e8b7089a0484d9a1662b509dfbedf94558a7bdded52112558f5bfd29fc32cbbd15d03a2ba360d10fc0c76762cf3fe8cf9c20006fddd0e6a1cbce

  • SSDEEP

    384:s3Mg/bqo2i2jQZ/rtcp3pUNqaJ2Gr91CJaPTt6oRUeU:Sqo2CZTypGUe/r9SyhaeU

Malware Config

Extracted

Path

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

Ransom Note
(HACKED BY IRIS) Hello! All of your files have been encrypted! Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help. What can I do to get my files back? You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $350. Payment can be made in Monero only. What happens if i don't pay? If you decide not to pay the ransom, All of your files and everything on your device will be released on the dark web for people to buy/view and will be deleted from your cumputer forever. This also goes for any other devices that are on your network (WIFI). How do I buy Monero/XMR? Look up a youtube video on how to buy the coin, or visit localmonero.co to buy from a seller. Payment Type: Monero/Xmr Coin Amount: $350 USD In Monero/XMR Monero/XMR address to send to: 48FHcV21wn56hRt2kipV4tScT4RnVU5PyUoAqjRQbdLqEvKDg3E4Kgfc1yb7RLqG7RXz8N4sxQgdmEgrRoR8AAyh5wW3Ui4 For any questions contact: [email protected]

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 2 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • 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
  • 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
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 47 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\2024-04-21_daf8e1d1c3778042cc92374eeba5af51_chaos_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-21_daf8e1d1c3778042cc92374eeba5af51_chaos_destroyer_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3100
    • 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)
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3872
      • 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:5016
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2972
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4124
      • 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:2012
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4432
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1228
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2280
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2748
      • 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:2952
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1188
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1128
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4356
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3876

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      24KB

      MD5

      daf8e1d1c3778042cc92374eeba5af51

      SHA1

      8b9f991cb7e290ef86eb0494c4ef7e14607240ee

      SHA256

      83ebe9ac38941dfecead0c664b3517032ce8258f240f67699a6424290871cdee

      SHA512

      cc744eb077f4e8b7089a0484d9a1662b509dfbedf94558a7bdded52112558f5bfd29fc32cbbd15d03a2ba360d10fc0c76762cf3fe8cf9c20006fddd0e6a1cbce

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

      Filesize

      1KB

      MD5

      0ffcc3ce1ccfa5b124220232c2441e6f

      SHA1

      ae62c3e836542b406c94c57ffff84b7ca02ea2fb

      SHA256

      2ccf991bf1de37d8b8bff84575075f29880d20e74a2295187bd6f0045d33292b

      SHA512

      9d47a5c3463cb9f06b4cdb724f2f86509c5d2fce4dca509f628a0c36ee910c6c31d3fc248e805d87787e23129426863792c1a2c9a1c71285d05ee7fec1852483

    • memory/3100-0-0x0000000000B40000-0x0000000000B4C000-memory.dmp

      Filesize

      48KB

    • memory/3100-1-0x00007FFE38360000-0x00007FFE38E21000-memory.dmp

      Filesize

      10.8MB

    • memory/3100-14-0x00007FFE38360000-0x00007FFE38E21000-memory.dmp

      Filesize

      10.8MB

    • memory/3872-15-0x00007FFE38360000-0x00007FFE38E21000-memory.dmp

      Filesize

      10.8MB

    • memory/3872-478-0x00007FFE38360000-0x00007FFE38E21000-memory.dmp

      Filesize

      10.8MB