Analysis

  • max time kernel
    88s
  • max time network
    90s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-07-2024 07:50

General

  • Target

    software.exe

  • Size

    588KB

  • MD5

    e7448d342d7e89f6fa442e0e1dc93c08

  • SHA1

    4b42759041cb3a27318d063af1c9c1c8d35c6ef4

  • SHA256

    897a5aba27fb713b468c4788ef1a3b8bb4d595afbeb94a3caf7ad6ee11a02361

  • SHA512

    55750a59d25a1e127010fbd6fc05d0b9e5eafb331bf22f082a5d9f9dc0e601a792805de6b016344ac8763dfbad90f9ce87f205ef1df271a28cc015345d31f435

  • SSDEEP

    6144:cr9iJVLaPXguyOiMV7BoV/q+qbJu2hTMKZwHNsp+l3QiiWKO+LL:haMOTV7BoVi+qbJueTRZn+l3QiOn

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
  • Drops file in System32 directory 11 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 2 IoCs
  • Opens file in notepad (likely ransom note) 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 54 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 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\software.exe
    "C:\Users\Admin\AppData\Local\Temp\software.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4980
    • 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:1668
      • 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:964
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2948
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1140
      • 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:3676
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4484
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4832
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2720
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2368
      • 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)
        • Suspicious use of FindShellTrayWindow
        PID:1068
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1232
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4000
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4592
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2332
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Public\Desktop\read_it.txt
      1⤵
      • Opens file in notepad (likely ransom note)
      PID:4348
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:4300
      • C:\Windows\system32\mspaint.exe
        "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Downloads\InstallSet.jpeg" /ForceBootstrapPaint3D
        1⤵
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:2052
      • C:\Windows\System32\svchost.exe
        C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s DsSvc
        1⤵
        • Drops file in System32 directory
        PID:2056
      • C:\Windows\system32\OpenWith.exe
        C:\Windows\system32\OpenWith.exe -Embedding
        1⤵
        • Suspicious use of SetWindowsHookEx
        PID:4748

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        588KB

        MD5

        e7448d342d7e89f6fa442e0e1dc93c08

        SHA1

        4b42759041cb3a27318d063af1c9c1c8d35c6ef4

        SHA256

        897a5aba27fb713b468c4788ef1a3b8bb4d595afbeb94a3caf7ad6ee11a02361

        SHA512

        55750a59d25a1e127010fbd6fc05d0b9e5eafb331bf22f082a5d9f9dc0e601a792805de6b016344ac8763dfbad90f9ce87f205ef1df271a28cc015345d31f435

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

        Filesize

        480B

        MD5

        57285d2fcf6f1a943a90b1abca3a5191

        SHA1

        1d7e84747a9b2763502787169907fc6bd6183047

        SHA256

        163526ec93c5c74cfa37ad2be9396a53398ac129cf358fd0a487656810bd3f8e

        SHA512

        98b2ab132c52136b6b6259f79ae3efc944a2b3e09619ea9a0daaffbed6dff8e7eade25ee876f0ea96aa1dd29cfe342c15eb4fafaecb85aea5c18cef5663d1632

      • memory/1668-74-0x00007FFF4F5C0000-0x00007FFF50081000-memory.dmp

        Filesize

        10.8MB

      • memory/1668-14-0x00007FFF4F5C0000-0x00007FFF50081000-memory.dmp

        Filesize

        10.8MB

      • memory/2056-77-0x00000208A33B0000-0x00000208A33C0000-memory.dmp

        Filesize

        64KB

      • memory/2056-81-0x00000208A3C60000-0x00000208A3C70000-memory.dmp

        Filesize

        64KB

      • memory/2056-88-0x00000208ABF40000-0x00000208ABF41000-memory.dmp

        Filesize

        4KB

      • memory/2056-90-0x00000208ABFC0000-0x00000208ABFC1000-memory.dmp

        Filesize

        4KB

      • memory/2056-92-0x00000208ABFC0000-0x00000208ABFC1000-memory.dmp

        Filesize

        4KB

      • memory/2056-94-0x00000208AC050000-0x00000208AC051000-memory.dmp

        Filesize

        4KB

      • memory/2056-93-0x00000208AC050000-0x00000208AC051000-memory.dmp

        Filesize

        4KB

      • memory/2056-95-0x00000208AC060000-0x00000208AC061000-memory.dmp

        Filesize

        4KB

      • memory/2056-96-0x00000208AC060000-0x00000208AC061000-memory.dmp

        Filesize

        4KB

      • memory/4980-1-0x00007FFF4F5C3000-0x00007FFF4F5C5000-memory.dmp

        Filesize

        8KB

      • memory/4980-0-0x0000000000070000-0x000000000010A000-memory.dmp

        Filesize

        616KB