Analysis

  • max time kernel
    118s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    21-01-2024 18:25

General

  • Target

    2f9967e58f4c436c102a7de4c8e5b5aef61db1ddc0c5df601dc70b25b7416b46.exe

  • Size

    956KB

  • MD5

    57f8fbce24a06fa399c8690a6703a850

  • SHA1

    248bf857d4739f60fbb0f4e9dbd855f3cbf2d09f

  • SHA256

    2f9967e58f4c436c102a7de4c8e5b5aef61db1ddc0c5df601dc70b25b7416b46

  • SHA512

    048228574eb2d74a1f499281d44dd3631e395840db58c37a154fefdae00a759c01502d99fd23619c26d17bcff39e95dc8a21f3133707e49dcaab53057a048c33

  • SSDEEP

    24576:+9EZn4OkTe8Rfzvbi+1WmYL/hfqDTJI1enwRn+9:eEZbk68RffEhmJII

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (173) 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.

  • Disables Task Manager via registry modification
  • .NET Reactor proctector 6 IoCs

    Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

  • Drops startup file 2 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.

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 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\2f9967e58f4c436c102a7de4c8e5b5aef61db1ddc0c5df601dc70b25b7416b46.exe
    "C:\Users\Admin\AppData\Local\Temp\2f9967e58f4c436c102a7de4c8e5b5aef61db1ddc0c5df601dc70b25b7416b46.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2544
    • 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:2396
      • 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:3012
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1172
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2072
      • 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:2452
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1600
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2884
  • C:\Windows\system32\vssadmin.exe
    vssadmin delete shadows /all /quiet
    1⤵
    • Interacts with shadow copies
    PID:2372
  • C:\Windows\system32\bcdedit.exe
    bcdedit /set {default} bootstatuspolicy ignoreallfailures
    1⤵
    • Modifies boot configuration data using bcdedit
    PID:2280
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1836
  • C:\Windows\system32\wbadmin.exe
    wbadmin delete catalog -quiet
    1⤵
    • Deletes backup catalog
    PID:1728
  • C:\Windows\System32\vds.exe
    C:\Windows\System32\vds.exe
    1⤵
      PID:880
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1840
      • C:\Windows\system32\bcdedit.exe
        bcdedit /set {default} recoveryenabled no
        1⤵
        • Modifies boot configuration data using bcdedit
        PID:2296

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      Command and Scripting Interpreter

      1
      T1059

      Persistence

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Indicator Removal

      3
      T1070

      File Deletion

      3
      T1070.004

      Modify Registry

      2
      T1112

      Credential Access

      Unsecured Credentials

      1
      T1552

      Credentials In Files

      1
      T1552.001

      Discovery

      System Information Discovery

      1
      T1082

      Query Registry

      1
      T1012

      Collection

      Data from Local System

      1
      T1005

      Impact

      Inhibit System Recovery

      4
      T1490

      Defacement

      1
      T1491

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\Adobe\Updater6\READ_ME.txt
        Filesize

        1KB

        MD5

        add828d44008c3d036f0a66a82d1a1d7

        SHA1

        bb21765e1dde324ffa71bc2dccbb8c1283b4e988

        SHA256

        668e038b6bacf1a52e83a73d2b968e1b67b5c597d3ec57a84c8f5ce3882abc81

        SHA512

        00f15f128e2ab397dc260704edafe50a1aa012fe4da2939f006f082cdac7df8692fe4f249cba6ccac3fbfdcee5e246c5f7aacd0f65f91e0b198d67c24054deab

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

        489KB

        MD5

        0a1c9ff34e67646f57596d18e979ba16

        SHA1

        6d2a2efd7464d0e07ecdac53e9a0b99932589626

        SHA256

        64a7235ffc546f69c524385d0c07e08ef948db87012e4c7ecc8ad24b31b21bd6

        SHA512

        2fd1a506799bb594a633c2a29bc715a66ae43b2c8142613ef7a49825a89603f44b0a61867201a730706aba2aa7dadcc76f66c2139372576193c935ac22528fe2

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

        434KB

        MD5

        fc700932a0b01e844b7c3c5e67465176

        SHA1

        94a5e938e27d9df3529a398ef0a1c26573256103

        SHA256

        deb530b111f2b6d9d3087795c5235f7977d1d43bae73d8cdbfb0367bf552189e

        SHA512

        0ada5e6db244d5c38d295991d6de2d4944a576b33d6d5d44a8ff923a83121732312450f1380ee421a816e17c3ca2853fc49296cd4b15a01e989e1cdfb6d0f0d4

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

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2396-8-0x0000000000230000-0x0000000000324000-memory.dmp
        Filesize

        976KB

      • memory/2396-10-0x000007FEF5380000-0x000007FEF5D6C000-memory.dmp
        Filesize

        9.9MB

      • memory/2396-11-0x000000001B230000-0x000000001B2B0000-memory.dmp
        Filesize

        512KB

      • memory/2396-891-0x000007FEF5380000-0x000007FEF5D6C000-memory.dmp
        Filesize

        9.9MB

      • memory/2396-892-0x000000001B230000-0x000000001B2B0000-memory.dmp
        Filesize

        512KB

      • memory/2544-9-0x000007FEF5380000-0x000007FEF5D6C000-memory.dmp
        Filesize

        9.9MB

      • memory/2544-0-0x00000000010D0000-0x00000000011C4000-memory.dmp
        Filesize

        976KB

      • memory/2544-2-0x000000001AC90000-0x000000001AD10000-memory.dmp
        Filesize

        512KB

      • memory/2544-1-0x000007FEF5380000-0x000007FEF5D6C000-memory.dmp
        Filesize

        9.9MB