Resubmissions

13-07-2024 09:54

240713-lxbx6swdmm 10

13-07-2024 09:50

240713-lvbvdsyapd 10

13-07-2024 09:46

240713-lr1dksyajd 10

Analysis

  • max time kernel
    31s
  • 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

    24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe

  • Size

    88KB

  • MD5

    e60df2922d5ceb45856f405e41a9d6cc

  • SHA1

    2e438348f4ec2fbd82ce944ad3697d58771ac170

  • SHA256

    24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d

  • SHA512

    21eac0c509698b0b257e0f8b304204b0f29bbca8f0fafbb33aee5d93af727859ec6e2977c45c658248858cbe362ee5438c37bf566c269e4b708a89f22c87cca3

  • SSDEEP

    768:/qo23p8xAcr9G5eH2SU2Ip4jBqltCF0AxEjenoB69+Fx:yo2iAcr9GYH2SFHBWAxEjc+

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
  • Renames multiple (213) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • 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
  • 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 41 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\24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
    "C:\Users\Admin\AppData\Local\Temp\24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2588
    • 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)
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2176
      • 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:1900
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2752
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4072
      • 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:4364
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4316
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:936
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:364
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4996
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\readme.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1284
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1968
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2044
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4360
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1652

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      88KB

      MD5

      e60df2922d5ceb45856f405e41a9d6cc

      SHA1

      2e438348f4ec2fbd82ce944ad3697d58771ac170

      SHA256

      24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d

      SHA512

      21eac0c509698b0b257e0f8b304204b0f29bbca8f0fafbb33aee5d93af727859ec6e2977c45c658248858cbe362ee5438c37bf566c269e4b708a89f22c87cca3

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

      Filesize

      383B

      MD5

      83ed0a180949592c8f79f789175ea653

      SHA1

      19871ab2de4d5f8e0864c7b76ea0fdff036d9e45

      SHA256

      2a01b766122215da2478d0d8eb3cf23b19d111cbd49454794effabd1f20f47ca

      SHA512

      7c0c772951faebcd16b13247fbd7e4cbf2bfc28a63e579e2ea07f9a0c3dcc33adb927e0bc613f8a3bf5e02940a34c6ed2f525d85e33d6be231437d89a051233b

    • memory/2176-14-0x00007FFF21F30000-0x00007FFF229F1000-memory.dmp

      Filesize

      10.8MB

    • memory/2176-496-0x00007FFF21F30000-0x00007FFF229F1000-memory.dmp

      Filesize

      10.8MB

    • memory/2588-0-0x00007FFF21F33000-0x00007FFF21F35000-memory.dmp

      Filesize

      8KB

    • memory/2588-1-0x0000000000D70000-0x0000000000D8C000-memory.dmp

      Filesize

      112KB