Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-11-2024 15:43

General

  • Target

    PepperX1.exe

  • Size

    81KB

  • MD5

    b950502f66e5c9b058f340ab24b3b5ab

  • SHA1

    fad3abdf88ef351b25ef339a6d1a082d8516b9e9

  • SHA256

    d45f6608d6afc48189e0ef63e489f9034cd3e864a95d634640df53ad302b42b3

  • SHA512

    132235bf2ad67b8b22428e716a27d35b024c38ca09e770237688b4d4e88eb4f44a98b267c068f422aa75a6050bfff3db6073bc71619b5bb85fb76ddf9833a5f9

  • SSDEEP

    1536:w3kIZ4nmr9iW2wU3gUvpdO0J//E2dLEgtMRloDpU:w3kI4nmr9iY7MhdHMRl6pU

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\PepperX1.exe
    "C:\Users\Admin\AppData\Local\Temp\PepperX1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3568
    • 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:4020
      • 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:4900
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:4176
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:312
      • 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:2272
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4196
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3228
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:400
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:3736
      • 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:3116
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1504
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3152
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1140
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:5116

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      81KB

      MD5

      b950502f66e5c9b058f340ab24b3b5ab

      SHA1

      fad3abdf88ef351b25ef339a6d1a082d8516b9e9

      SHA256

      d45f6608d6afc48189e0ef63e489f9034cd3e864a95d634640df53ad302b42b3

      SHA512

      132235bf2ad67b8b22428e716a27d35b024c38ca09e770237688b4d4e88eb4f44a98b267c068f422aa75a6050bfff3db6073bc71619b5bb85fb76ddf9833a5f9

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

      Filesize

      778B

      MD5

      e476ae4628a4272384255b6003b1b5b3

      SHA1

      7bd05141ec08774a5c0ae500e0a5d9806be681f4

      SHA256

      c5f2d8ef689c1af8b9d9f9908beb8e9e16abe5338bc569f4998d6f5e45b95d0f

      SHA512

      a9ac31705fb99985f1b241c5d06447c6870dd5f203bfc43056c7d2c92e6f0af9711395e42707253ec98730f1e765966359ec061f1deee6529df69fe4354a5d8e

    • memory/3568-0-0x00007FFCED2A3000-0x00007FFCED2A5000-memory.dmp

      Filesize

      8KB

    • memory/3568-1-0x0000000000D50000-0x0000000000D6A000-memory.dmp

      Filesize

      104KB

    • memory/4020-14-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

      Filesize

      10.8MB

    • memory/4020-71-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

      Filesize

      10.8MB