Resubmissions

16-02-2025 21:09

250216-zznawayrat 10

16-02-2025 21:04

250216-zw37xsymdl 10

16-02-2025 04:51

250216-fgyt4stmcy 10

Analysis

  • max time kernel
    55s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-02-2025 04:51

General

  • Target

    sorry.exe

  • Size

    508KB

  • MD5

    9ab2affe7c7eb0d1b95ccf4216d7d972

  • SHA1

    902113db29be4f88cb61b93145dc09bbd0ca2690

  • SHA256

    288f536597498859b243ab7c280b08fda04c1d29230334a62654daf56e7fa70a

  • SHA512

    ce44e83b8296c6bf5e867cfdfe08eacfebea20ba09e91d9c1859ec47af4634ca932392a00299c8555ec7fbd5d39230c7987aaa4d6a725fde24d4497b0679aa31

  • SSDEEP

    12288:m4rJa124PiPzOvVTp0e6qD7dxYOo10n8GxQmTRTE9hoyi8r7IK6Bww5:m73E+EAKa

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.

  • Disables Task Manager via registry modification
  • Drops startup file 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 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\sorry.exe
    "C:\Users\Admin\AppData\Local\Temp\sorry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2312
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • 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:1756
      • 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:2736
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2764
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3048
      • 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:2436
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2876
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1988
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1800
      • 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:1416
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2964
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1360
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1996
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2856
      • C:\Windows\system32\cmd.exe
        cmd /c ""C:\Users\Admin\Desktop\CheckpointMeasure.cmd" "
        1⤵
          PID:1268
        • C:\Windows\system32\cmd.exe
          cmd /c ""C:\Users\Admin\Desktop\CheckpointMeasure.cmd" "
          1⤵
            PID:1656
          • C:\Windows\system32\rundll32.exe
            "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\AddRevoke.xlsx.2rqb
            1⤵
            • Modifies registry class
            PID:700
          • C:\Windows\SysWOW64\DllHost.exe
            C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
            1⤵
            • System Location Discovery: System Language Discovery
            PID:1276
          • C:\Windows\system32\rstrui.exe
            "C:\Windows\system32\rstrui.exe"
            1⤵
            • Drops file in Windows directory
            PID:780
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:612

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\ProgramData\Adobe\Updater6\read_it.txt

            Filesize

            105B

            MD5

            a9438a0d642751f0da1f6f3ced742cf0

            SHA1

            945892b565d6fece6e4f7c186fcaea6a077459df

            SHA256

            762654958bef832abaea261654d9e47a4313f503ee9bac880d1bf0d3579e032e

            SHA512

            ff8ded51608f928db421fdb89c756b163ca0d01823e03402b034286a6933ae0a7776ff8a45be10c0b5ef83fd22c1de8b7663013a20a822d951c65465cc20edbe

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

            Filesize

            508KB

            MD5

            9ab2affe7c7eb0d1b95ccf4216d7d972

            SHA1

            902113db29be4f88cb61b93145dc09bbd0ca2690

            SHA256

            288f536597498859b243ab7c280b08fda04c1d29230334a62654daf56e7fa70a

            SHA512

            ce44e83b8296c6bf5e867cfdfe08eacfebea20ba09e91d9c1859ec47af4634ca932392a00299c8555ec7fbd5d39230c7987aaa4d6a725fde24d4497b0679aa31

          • C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

            Filesize

            1B

            MD5

            d1457b72c3fb323a2671125aef3eab5d

            SHA1

            5bab61eb53176449e25c2c82f172b82cb13ffb9d

            SHA256

            8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

            SHA512

            ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

          • memory/1756-8-0x0000000001010000-0x0000000001096000-memory.dmp

            Filesize

            536KB

          • memory/1756-10-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

            Filesize

            9.9MB

          • memory/1756-11-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

            Filesize

            9.9MB

          • memory/1756-957-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

            Filesize

            9.9MB

          • memory/2312-0-0x000007FEF5C33000-0x000007FEF5C34000-memory.dmp

            Filesize

            4KB

          • memory/2312-1-0x00000000000B0000-0x0000000000136000-memory.dmp

            Filesize

            536KB

          • memory/2312-3-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

            Filesize

            9.9MB

          • memory/2312-9-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

            Filesize

            9.9MB