Analysis

  • max time kernel
    140s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2024 16:31

General

  • Target

    be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe

  • Size

    142KB

  • MD5

    af70883f7ff9f9c19286ed07972bab84

  • SHA1

    5d59cc33696cdc78f59448f2f6fb6cb08622b976

  • SHA256

    be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

  • SHA512

    bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1

  • SSDEEP

    3072:o3kGRr9i0TVKIe6m8sdpcL0uhq70NEqj5Swo29V56K+Olhly3UdcHkl:+r9i0sIF5gdQubv29V56K+ihly3MN

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 51 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\be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
    "C:\Users\Admin\AppData\Local\Temp\be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4236
    • C:\Users\Admin\AppData\Roaming\svchoster.exe
      "C:\Users\Admin\AppData\Roaming\svchoster.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:3364
      • 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:3900
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2680
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:796
      • 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:1600
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:692
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2180
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4916
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2160
      • 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:4116
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3852
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4452
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4872
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:5112

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      142KB

      MD5

      af70883f7ff9f9c19286ed07972bab84

      SHA1

      5d59cc33696cdc78f59448f2f6fb6cb08622b976

      SHA256

      be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

      SHA512

      bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1

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

      Filesize

      111B

      MD5

      016ab2aa899fdab8fe2dd4c4bb73548d

      SHA1

      2bf57b835d272a3b0b5f29fb145ac6bd509cd53c

      SHA256

      223706ee4377f157850bdffaa87c85ce49fb15bade70d08e19c3138106134748

      SHA512

      d46b73dd0ff072904b513dce54c164a30e0262b735d9254ffc7b596a2e691b2aa20ef57c82e95667ac5e051fbcc8be0bd82a49bdf0795058ab0a2b6ca3da3dab

    • memory/3364-14-0x00007FFB69680000-0x00007FFB6A141000-memory.dmp

      Filesize

      10.8MB

    • memory/3364-78-0x00007FFB69680000-0x00007FFB6A141000-memory.dmp

      Filesize

      10.8MB

    • memory/3364-79-0x00007FFB69680000-0x00007FFB6A141000-memory.dmp

      Filesize

      10.8MB

    • memory/4236-1-0x00000000009C0000-0x00000000009EA000-memory.dmp

      Filesize

      168KB

    • memory/4236-0-0x00007FFB69683000-0x00007FFB69685000-memory.dmp

      Filesize

      8KB