Analysis

  • max time kernel
    122s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2024 16:43

General

  • Target

    PepperX (2).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 3 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.

  • 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).

  • Interacts with shadow copies 3 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 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\PepperX (2).exe
    "C:\Users\Admin\AppData\Local\Temp\PepperX (2).exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2648
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • 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:2016
      • 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:2124
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2704
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1380
      • 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:880
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1300
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1424
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2716
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2524
      • 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:2624
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2724
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2608
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2576
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1788

      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/2016-7-0x0000000000CB0000-0x0000000000CCA000-memory.dmp

        Filesize

        104KB

      • memory/2016-56-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2016-73-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2016-74-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2648-0-0x000007FEF5BC3000-0x000007FEF5BC4000-memory.dmp

        Filesize

        4KB

      • memory/2648-1-0x0000000001170000-0x000000000118A000-memory.dmp

        Filesize

        104KB