Overview

overview

10

Static

static

3

2024-04-01...os.exe

windows7-x64

10

2024-04-01...os.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-04-2024 16:30

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General

  • Target

    2024-04-01_442d4e80550a6e0dc210a7fb7ee43f3c_phobos.exe

  • Size

    56KB

  • MD5

    442d4e80550a6e0dc210a7fb7ee43f3c

  • SHA1

    45050a0f88e84f1edb216fab766db98291319073

  • SHA256

    3d42d7ba81d48f395ed578c63302ef2f5d44bc2e0dc7f3d775d25ed0db54ef33

  • SHA512

    2f0ba0955d3b360f26a90d7d84060952869ea13140101c6118d7632204dc131adc8a9e260deca0fdf8d2e4526d2f5d20d3963d384c01112da83b07687d0371c0

  • SSDEEP

    1536:NNeRBl5PT/rx1mzwRMSTdLpJqReV7RSkjvr:NQRrmzwR5JEeVtS

Score
10/10
phobosevasionpersistenceransomwarespywarestealer

Malware Config

Signatures

  • Phobos

    Phobos ransomware appeared at the beginning of 2019.

    ransomwarephobos
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (682) files with added filename extension

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

    ransomware
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Modifies Windows Firewall 2 TTPs 2 IoCs
    evasion
  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops desktop.ini file(s) 16 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 49 IoCs
  • Suspicious use of WriteProcessMemory 18 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.

    persistence
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-01_442d4e80550a6e0dc210a7fb7ee43f3c_phobos.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-01_442d4e80550a6e0dc210a7fb7ee43f3c_phobos.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4384
    • C:\Users\Admin\AppData\Local\Temp\2024-04-01_442d4e80550a6e0dc210a7fb7ee43f3c_phobos.exe
      "C:\Users\Admin\AppData\Local\Temp\2024-04-01_442d4e80550a6e0dc210a7fb7ee43f3c_phobos.exe"
      2⤵
        PID:620
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:180
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2120
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:112
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:4200
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:2028
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4608
        • C:\Windows\system32\netsh.exe
          netsh advfirewall set currentprofile state off
          3⤵
          • Modifies Windows Firewall
          PID:2212
        • C:\Windows\system32\netsh.exe
          netsh firewall set opmode mode=disable
          3⤵
          • Modifies Windows Firewall
          PID:3568
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1832
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:552
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1652
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:2608
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3920 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:1484

        Network

        MITRE ATT&CK Enterprise v15

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Command and Scripting Interpreter

        1
        T1059

        Persistence

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Privilege Escalation

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Defense Evasion

        Impair Defenses

        1
        T1562

        Disable or Modify System Firewall

        1
        T1562.004

        Indicator Removal

        3
        T1070

        File Deletion

        3
        T1070.004

        Modify Registry

        1
        T1112

        Credential Access

        Unsecured Credentials

        1
        T1552

        Credentials In Files

        1
        T1552.001

        Discovery

        Peripheral Device Discovery

        1
        T1120

        Query Registry

        2
        T1012

        System Information Discovery

        1
        T1082

        Lateral Movement

        Collection

        Data from Local System

        1
        T1005

        Command and Control

        Exfiltration

        Impact

        Inhibit System Recovery

        4
        T1490

        Replay Monitor

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        Downloads

        • C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64.dll.id[643A5F4B-3335].[[email protected]].HUNTER
          Filesize

          3.2MB

          MD5

          f9c98dc302d1c9c4ec643af2271ec9db

          SHA1

          3d6a19829b9f2e4660763dc9c2a889f2a780f9bf

          SHA256

          7dbf8fcde4d88368ac12fee330d194246312ff41f5985200bcc40c47dde5cd8b

          SHA512

          fd055f2d4ee0846c468f4dc5b8464fab261934393aec1aa27a9020915ec4646f2af988a8c7d8af1c3903d10ae90d6551dee806800fa557b61044f98dbfdbeee6

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