Resubmissions

13-07-2024 09:54

240713-lxbx6swdmm 10

13-07-2024 09:50

240713-lvbvdsyapd 10

13-07-2024 09:46

240713-lr1dksyajd 10

Analysis

  • max time kernel
    91s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-07-2024 09:46

General

  • Target

    2ebb2a34dd6633e785f67d118a8c778969e4e34d667cf554268997e13920a1c6.exe

  • Size

    241KB

  • MD5

    692ea33f6b08ccd47ef8a4f8b913fc4f

  • SHA1

    8a2f0c6b5f422cb2125273be1eece261aa3007e0

  • SHA256

    2ebb2a34dd6633e785f67d118a8c778969e4e34d667cf554268997e13920a1c6

  • SHA512

    df87964befe8dad825e869e4d915c46d71bb72b4f318f9c52d9a1381d391bad73aef5e555057e8189dca479359fa635b19727bb64d1876c1403057ed1e1faca7

  • SSDEEP

    3072:aoT9szr954q4qf8NWPr0Dp/XpoO1zDsJOFQVrFsUBTa488+6WniGxfLwxhqSEaqw:0r95wCPADpaOOwajTa65HyigEX1OeLn

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • 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 2 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
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 43 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\2ebb2a34dd6633e785f67d118a8c778969e4e34d667cf554268997e13920a1c6.exe
    "C:\Users\Admin\AppData\Local\Temp\2ebb2a34dd6633e785f67d118a8c778969e4e34d667cf554268997e13920a1c6.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2092
    • 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:1476
      • 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:1984
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3684
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1924
      • 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:2156
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1128
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2788
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4652
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2732
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ THIS.txt
        3⤵
          PID:100
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5004
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3956
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1192
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:2660

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        241KB

        MD5

        692ea33f6b08ccd47ef8a4f8b913fc4f

        SHA1

        8a2f0c6b5f422cb2125273be1eece261aa3007e0

        SHA256

        2ebb2a34dd6633e785f67d118a8c778969e4e34d667cf554268997e13920a1c6

        SHA512

        df87964befe8dad825e869e4d915c46d71bb72b4f318f9c52d9a1381d391bad73aef5e555057e8189dca479359fa635b19727bb64d1876c1403057ed1e1faca7

      • C:\Users\Admin\Documents\READ THIS.txt

        Filesize

        1KB

        MD5

        c7a49f0289132cbf3759e0838f6f9882

        SHA1

        005efab508820f1eb5ccdb625f0e0734443433ea

        SHA256

        18a896867fff1e840402ff32328804174ef2412a972198a28f9f1bc5afdc2a81

        SHA512

        a6e8105f43ab3b62e2ac21e0b94d8fcbdd7e29db884a78e8a6076e025688175d9307441c546414682d1b682d3c6e2682d70a4a6b3cb60f20dd0bd6e7f0e5440f

      • memory/1476-14-0x00007FFFAF390000-0x00007FFFAFE51000-memory.dmp

        Filesize

        10.8MB

      • memory/1476-490-0x00007FFFAF390000-0x00007FFFAFE51000-memory.dmp

        Filesize

        10.8MB

      • memory/2092-0-0x0000000000580000-0x00000000005C2000-memory.dmp

        Filesize

        264KB

      • memory/2092-1-0x00007FFFAF393000-0x00007FFFAF395000-memory.dmp

        Filesize

        8KB