Analysis

  • max time kernel
    140s
  • max time network
    104s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-11-2024 21:37

General

  • Target

    af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe

  • Size

    3.1MB

  • MD5

    3303698d5190201a3f6dd7f1118251e0

  • SHA1

    b7ef2c81d6ae8023ff811278ec3e5bfba8fd905d

  • SHA256

    af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55

  • SHA512

    7ee79e8be71b4f3f7e6c1678e5100484e774d445777adc8f744d782258fad7444a5cd775a8290fdaadd7ab95b3c5fdb2b10e644dc64daa340c770d34151293f4

  • SSDEEP

    24576:0wYAZ9hsTcbVPIw4OEezpOPoZzUt4MKom1W6USf5ZztnE/O/XZ/zhPw:zztbN5pZAJ0fJl8

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Chaos family
  • 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.

  • 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 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 34 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 3 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 49 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\af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe
    "C:\Users\Admin\AppData\Local\Temp\af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4756
    • 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)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2560
      • 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:4804
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3784
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1612
      • 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:3832
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1536
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1852
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4380
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1100
      • 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:1416
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:64
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4536
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:736
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3148

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      3.1MB

      MD5

      3303698d5190201a3f6dd7f1118251e0

      SHA1

      b7ef2c81d6ae8023ff811278ec3e5bfba8fd905d

      SHA256

      af0e24781ed3683f04dd86a616e31490f36c2da4cbb4fddc76efbd0fc4f15d55

      SHA512

      7ee79e8be71b4f3f7e6c1678e5100484e774d445777adc8f744d782258fad7444a5cd775a8290fdaadd7ab95b3c5fdb2b10e644dc64daa340c770d34151293f4

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

      Filesize

      507B

      MD5

      01da9388394d86f1e626ce4d08f3bebb

      SHA1

      3ceff3e1ea38d0f0df2f5906bdbe79180a230cc4

      SHA256

      a9108d9c95ebf0024ecd27e8ce34f6439c2f74b5c63917af83e150c9b45ef1a2

      SHA512

      e234f02dab37026a9bd0b926c1a6e475116954dc00276ec4fe6ea8dead178cf1bb292afa27bf7d60f88247904399c8f986b2a040b1313c30028b85c4bbd7eec2

    • memory/2560-14-0x00007FFE0B010000-0x00007FFE0BAD1000-memory.dmp

      Filesize

      10.8MB

    • memory/2560-481-0x00007FFE0B010000-0x00007FFE0BAD1000-memory.dmp

      Filesize

      10.8MB

    • memory/4756-0-0x00007FFE0B013000-0x00007FFE0B015000-memory.dmp

      Filesize

      8KB

    • memory/4756-1-0x0000000000C00000-0x0000000000F12000-memory.dmp

      Filesize

      3.1MB