Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

  • max time kernel
    149s
  • max time network
    153s
  • 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

    290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe

  • Size

    3.8MB

  • MD5

    3566f930e73eacee6933e672c1085d98

  • SHA1

    d6c5408fabbf943721946073c80049c3c65f8c8d

  • SHA256

    290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451

  • SHA512

    09e5edcc5fe7a8e6dac63690eb1c8674541993c5a10130db7ed3cee90d802705dc07a0b13612c6326b9462145dcac35e136b12555096e0ee8577e00c3aab69af

  • SSDEEP

    24576:TbnWYoXXBzGmL53TaX+vnyuNMOCig82RfVL0K1RWLghaPZUwB74amJl4aOLW6u3r:/W3XXBzhaWBq8Yy8kZmzJ/m

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
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 45 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\290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
    "C:\Users\Admin\AppData\Local\Temp\290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3140
    • 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:3220
      • 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:4624
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2476
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1408
      • 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:3332
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1776
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4300
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3520
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4436
      • 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:2864
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3724
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:5104
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:5012
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:556

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      3.8MB

      MD5

      3566f930e73eacee6933e672c1085d98

      SHA1

      d6c5408fabbf943721946073c80049c3c65f8c8d

      SHA256

      290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451

      SHA512

      09e5edcc5fe7a8e6dac63690eb1c8674541993c5a10130db7ed3cee90d802705dc07a0b13612c6326b9462145dcac35e136b12555096e0ee8577e00c3aab69af

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

      Filesize

      1014B

      MD5

      59085312841064e2ebb77e26fc8c6dc7

      SHA1

      705016171694a907442b71ccf053386d9bc7e552

      SHA256

      61f532b020e4c6e1d25ef11ef5f85ab7f65a51677e9e8cdaaf41bad00fe2cad0

      SHA512

      6f5ba769d7ef56044ae868d02bd31ccc1ab806a887e2a1b21c52e50f3996e48637ef782ac67e979ed2ccecbc94e767510e351b3a4a29b5b84b47aa87391b8d70

    • memory/3140-0-0x00007FF9251F3000-0x00007FF9251F5000-memory.dmp

      Filesize

      8KB

    • memory/3140-1-0x0000000000040000-0x000000000041C000-memory.dmp

      Filesize

      3.9MB

    • memory/3220-14-0x00007FF9251F0000-0x00007FF925CB1000-memory.dmp

      Filesize

      10.8MB

    • memory/3220-492-0x00007FF9251F0000-0x00007FF925CB1000-memory.dmp

      Filesize

      10.8MB