Overview

overview

10

Static

static

3

2024-05-17...os.exe

windows7-x64

10

2024-05-17...os.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    156s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2024 12:36

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General

  • Target

    2024-05-17_4fbc4fe1bb7e6bd7061a101413991f28_phobos.exe

  • Size

    56KB

  • MD5

    4fbc4fe1bb7e6bd7061a101413991f28

  • SHA1

    81069d5b57ec6d0d75a66e281be244733e016756

  • SHA256

    81d8cf0cbde14fa7226f846b2e4942e80042f94aba0606f0bd1c2c568333e38b

  • SHA512

    aa679471124bae14496883b2c7c37bc6fb411e9edc2d367cf396c3fa2b84bf53081dec8f08469c21445e969ae9fa2d7aa94cd9be41a9fd8a9adf0d38cd68dfbc

  • SSDEEP

    1536:aNeRBl5PT/rx1mzwRMSTdLpJvG2CeN302ltQiQR/9jA:aQRrmzwR5J+2Z06W

Score
10/10
phobosdefense_evasionevasionexecutionimpactpersistenceransomwarespywarestealer

Malware Config

Signatures

  • Phobos

    Phobos ransomware appeared at the beginning of 2019.

    ransomwarephobos
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (375) 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) 4 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\2024-05-17_4fbc4fe1bb7e6bd7061a101413991f28_phobos.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-17_4fbc4fe1bb7e6bd7061a101413991f28_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:940
    • C:\Users\Admin\AppData\Local\Temp\2024-05-17_4fbc4fe1bb7e6bd7061a101413991f28_phobos.exe
      "C:\Users\Admin\AppData\Local\Temp\2024-05-17_4fbc4fe1bb7e6bd7061a101413991f28_phobos.exe"
      2⤵
        PID:1588
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3964
        • C:\Windows\system32\netsh.exe
          netsh advfirewall set currentprofile state off
          3⤵
          • Modifies Windows Firewall
          PID:2608
        • C:\Windows\system32\netsh.exe
          netsh firewall set opmode mode=disable
          3⤵
          • Modifies Windows Firewall
          PID:4884
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4000
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:4140
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4528
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1536
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1596
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:4952
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2248
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3748
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1556
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:4216
      • 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=4068 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:5024

        Network

        MITRE ATT&CK Enterprise v15

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Command and Scripting Interpreter

        1
        T1059

        Windows Management Instrumentation

        1
        T1047

        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\AppvIsvSubsystems32.dll.id[944058B3-3531].[Accord77777@​aol.com].faust
          Filesize

          2.7MB

          MD5

          d21447e9047704f98203a491714b3bb1

          SHA1

          bfc5a3a9a2495c998e032897b7cfbdb032692d0a

          SHA256

          1ec016d6c443c84c9d498af335bd6eacb6157e75e60178fc86f277904aaf993b

          SHA512

          fa1f95a43a9c81de75e9900092918916040d1def1eb42f2beef7aa7c165dccf4f1030faf34c70fbed1d43ac677aa887aeaa7c98e40e308ba084562064653bb4e

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