Resubmissions

15-10-2024 03:47

241015-ecgjlashrh 10

05-08-2024 04:49

240805-ffygys1eke 10

05-08-2024 03:50

240805-eee4jszepd 10

Analysis

  • max time kernel
    92s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-08-2024 04:49

General

  • Target

    1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe

  • Size

    2.0MB

  • MD5

    fa06e6aadef2365052156f12c92d7b09

  • SHA1

    82de91795547028be327e75cee0fdf082352bfc9

  • SHA256

    1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813

  • SHA512

    1629a2d234c70e7f1f5927b5a816c80b9fb2c995b4b334ff994848d3c7fe1c8797b231c4baaa63ca1e837081e9859c3ca138cd76a1db314c6b98685f5489566e

  • SSDEEP

    24576:a5SndG2iSNjN2w9Os9cRfO/d8mT6c6aVqwPhUMelU+V:aMfJqsgXmgyJPE

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\1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe
    "C:\Users\Admin\AppData\Local\Temp\1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Users\Admin\AppData\Roaming\Windows Defender.exe
      "C:\Users\Admin\AppData\Roaming\Windows Defender.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:3968
      • 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:3312
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:4052
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1700
      • 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:820
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:388
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1068
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1824
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:3136
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\傻逼,你被耍了!你的所有文件都被加密!.txt
        3⤵
          PID:5088
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2860
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5044
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:4288
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:1584

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\Windows Defender.exe

        Filesize

        2.0MB

        MD5

        fa06e6aadef2365052156f12c92d7b09

        SHA1

        82de91795547028be327e75cee0fdf082352bfc9

        SHA256

        1af797776ec72874e6519962a5cfa3cd64c6061270774f7278755c69333a0813

        SHA512

        1629a2d234c70e7f1f5927b5a816c80b9fb2c995b4b334ff994848d3c7fe1c8797b231c4baaa63ca1e837081e9859c3ca138cd76a1db314c6b98685f5489566e

      • C:\Users\Admin\Documents\傻逼,你被耍了!你的所有文件都被加密!.txt

        Filesize

        470B

        MD5

        c83c2b8e368e928c7ab979f7bb44dac4

        SHA1

        4662ae6c1d2195a178bdeb23141df221181b9fdf

        SHA256

        d42f2a19a64f644085bb2411b58397f5ce8ff1d85857e9985163138964ea0251

        SHA512

        599f1cb6d607069544a492ed198fea62e51c5cefeb02ec33843cb63255705a2cf412467814493edf7a920b38ad71c65d8e6bd803b28b2f160e3b0727fc2cba2e

      • memory/3968-15-0x00007FFF20E30000-0x00007FFF218F1000-memory.dmp

        Filesize

        10.8MB

      • memory/3968-20-0x00007FFF20E30000-0x00007FFF218F1000-memory.dmp

        Filesize

        10.8MB

      • memory/3968-465-0x00007FFF20E30000-0x00007FFF218F1000-memory.dmp

        Filesize

        10.8MB

      • memory/4572-0-0x0000000000610000-0x0000000000814000-memory.dmp

        Filesize

        2.0MB

      • memory/4572-1-0x00007FFF20E33000-0x00007FFF20E35000-memory.dmp

        Filesize

        8KB

      • memory/4572-2-0x00007FFF20E33000-0x00007FFF20E35000-memory.dmp

        Filesize

        8KB