Overview

overview

10

Static

static

3

Fast.ex_.exe

windows7-x64

10

Fast.ex_.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/10/2023, 08:22

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General

  • Target
    Fast.ex_.exe
  • Size 56KB
  • Sample231004-j9jsfacb26
  • SHA256 8575dcf7c67612b4d1fc1315bb19318f06bb5abdc6341890e251eb303e386db7
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
phobosevasionpersistenceransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\info.hta

Ransom Note
  • <!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01//EN' 'http://www.w3.org/TR/html4/strict.dtd'> <html> <head> <meta charset='windows-1251'> <title>encrypted</title> <HTA:APPLICATION ICON='msiexec.exe' SINGLEINSTANCE='yes' SysMenu="no"> <script language='JScript'> window.moveTo(50, 50); window.resizeTo(screen.width - 100, screen.height - 100); </script> <style type='text/css'> body { font: 15px Tahoma, sans-serif; margin: 10px; line-height: 25px; background: #EDEDED; } img { display:inline-block; } .bold { font-weight: bold; } .mark { background: #D0D0E8; padding: 2px 5px; } .header { text-align: center; font-size: 30px; line-height: 50px; font-weight: bold; margin-bottom:20px; } .info { background: #D0D0E8; border-left: 10px solid #00008B; } .alert { background: #FFE4E4; border-left: 10px solid #FF0000; } .private { border: 1px dashed #000; background: #FFFFEF; } .note { height: auto; padding-bottom: 1px; margin: 15px 0; } .note .title { font-weight: bold; text-indent: 10px; height: 30px; line-height: 30px; padding-top: 10px; } .note .mark { background: #A2A2B5; } .note ul { margin-top: 0; } .note pre { margin-left: 15px; line-height: 13px; font-size: 13px; } .footer { position:fixed; bottom:0; right:0; text-align: right; } </style> </head> <body> <div class='header'> <img src='data:image/png;base64,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'> <div>All your files have been encrypted!</div> </div> <div class='bold'>All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail <span class='mark'>[email protected]</span></div> <div class='bold'>Write this ID in the title of your message <span class='mark'>6DCDD8B3-3404</span></div> <div class='bold'>In case of no answer in 24 hours write us to this e-mail:<span class='mark'>[email protected]</span></div> <div> You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the tool that will decrypt all your files. </div> <div class='note info'> <div class='title'>Free decryption as guarantee</div> <ul>Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 4Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.) </ul> </div> <div class='note info'> <div class='title'>How to obtain Bitcoins</div> <ul> The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select the seller by payment method and price. <br><a href='https://localbitcoins.com/buy_bitcoins'>https://localbitcoins.com/buy_bitcoins</a> <br> Also you can find other places to buy Bitcoins and beginners guide here: <br><a href='http://www.coindesk.com/information/how-can-i-buy-bitcoins/'>http://www.coindesk.com/information/how-can-i-buy-bitcoins/</a> </ul> </div> <div class='note alert'> <div class='title'>Attention!</div> <ul> <li>Do not rename encrypted files.</li> <li>Do not try to decrypt your data using third party software, it may cause permanent data loss.</li> <li>Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.</li> </ul> </div> </body> </html>
Emails
URLs

  • http://www.w3.org/TR/html4/strict.dtd'>

Extracted

Path

  • C:\info.hta

Ransom Note
  • All your files have been encrypted! All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail [email protected] Write this ID in the title of your message 6DCDD8B3-3404 In case of no answer in 24 hours write us to this e-mail: [email protected] You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the tool that will decrypt all your files. Free decryption as guarantee Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 4Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.) How to obtain Bitcoins The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select the seller by payment method and price. https://localbitcoins.com/buy_bitcoins Also you can find other places to buy Bitcoins and beginners guide here: http://www.coindesk.com/information/how-can-i-buy-bitcoins/ Attention! Do not rename encrypted files. Do not try to decrypt your data using third party software, it may cause permanent data loss. Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.

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 4 IoCs
    ransomwareevasion
  • Renames multiple (468) files with added filename extension

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

    ransomware
  • Deletes backup catalog 3 TTPs 2 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Modifies Windows Firewall 1 TTPs 2 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 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) 64 IoCs
  • Drops file in Program Files directory 64 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 2 TTPs 2 IoCs

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

    ransomware
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 42 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\Fast.ex_.exe
    "C:\Users\Admin\AppData\Local\Temp\Fast.ex_.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:264
    • C:\Users\Admin\AppData\Local\Temp\Fast.ex_.exe
      "C:\Users\Admin\AppData\Local\Temp\Fast.ex_.exe"
      2⤵
        PID:2484
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4008
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:3868
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2168
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:3784
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1848
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:4908
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:5024
        • C:\Windows\system32\netsh.exe
          netsh advfirewall set currentprofile state off
          3⤵
          • Modifies Windows Firewall
          PID:3680
        • C:\Windows\system32\netsh.exe
          netsh firewall set opmode mode=disable
          3⤵
          • Modifies Windows Firewall
          PID:1048
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\info.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
        2⤵
          PID:1756
        • C:\Windows\SysWOW64\mshta.exe
          "C:\Windows\SysWOW64\mshta.exe" "C:\users\public\desktop\info.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
          2⤵
            PID:560
          • C:\Windows\SysWOW64\mshta.exe
            "C:\Windows\SysWOW64\mshta.exe" "C:\info.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
            2⤵
              PID:5340
            • C:\Windows\SysWOW64\mshta.exe
              "C:\Windows\SysWOW64\mshta.exe" "F:\info.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
              2⤵
                PID:4688
              • C:\Windows\system32\cmd.exe
                "C:\Windows\system32\cmd.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:2144
                • C:\Windows\system32\vssadmin.exe
                  vssadmin delete shadows /all /quiet
                  3⤵
                  • Interacts with shadow copies
                  PID:5132
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic shadowcopy delete
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:5316
                • C:\Windows\system32\bcdedit.exe
                  bcdedit /set {default} bootstatuspolicy ignoreallfailures
                  3⤵
                  • Modifies boot configuration data using bcdedit
                  PID:5260
                • C:\Windows\system32\bcdedit.exe
                  bcdedit /set {default} recoveryenabled no
                  3⤵
                  • Modifies boot configuration data using bcdedit
                  PID:5232
                • C:\Windows\system32\wbadmin.exe
                  wbadmin delete catalog -quiet
                  3⤵
                  • Deletes backup catalog
                  PID:5268
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2592
            • C:\Windows\system32\wbengine.exe
              "C:\Windows\system32\wbengine.exe"
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:4128
            • C:\Windows\System32\vdsldr.exe
              C:\Windows\System32\vdsldr.exe -Embedding
              1⤵
                PID:2132
              • C:\Windows\System32\vds.exe
                C:\Windows\System32\vds.exe
                1⤵
                • Checks SCSI registry key(s)
                PID:1072
              • C:\Windows\system32\rundll32.exe
                "C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
                1⤵
                  PID:5312
                • C:\Windows\System32\svchost.exe
                  C:\Windows\System32\svchost.exe -k UnistackSvcGroup
                  1⤵
                    PID:4680

                  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

                        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

                        3
                        T1012

                        System Information Discovery

                        3
                        T1082

                        Lateral Movement

                        Collection

                        Data from Local System

                        1
                        T1005

                        Command and Control

                        Exfiltration

                        Impact

                        Inhibit System Recovery

                        4
                        T1490

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        AppvIsvSubsystems32.dll.id[6DCDD8B3-3404].[[email protected]].Elbie
                        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems32.dll.id[6DCDD8B3-3404].[[email protected]].Elbie
                        • Size 2.7MB
                        • SHA256 064e1381d11312ac34dee39667d561b814d968b91fac73340ebfa2817d8290a0
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        info.hta
                        • Path C:\Users\Admin\Desktop\info.hta
                        • Size 5KB
                        • SHA256 e928188d36a5a25ae3675476f4b79f88f8a817e2ecd9b1a4c913d9e463c30c93
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        info.hta
                        • Path C:\info.hta
                        • Size 5KB
                        • SHA256 e928188d36a5a25ae3675476f4b79f88f8a817e2ecd9b1a4c913d9e463c30c93
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        info.hta
                        • Path C:\info.hta
                        • Size 5KB
                        • SHA256 e928188d36a5a25ae3675476f4b79f88f8a817e2ecd9b1a4c913d9e463c30c93
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        info.hta
                        • Path C:\users\public\desktop\info.hta
                        • Size 5KB
                        • SHA256 e928188d36a5a25ae3675476f4b79f88f8a817e2ecd9b1a4c913d9e463c30c93
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        info.hta
                        • Path F:\info.hta
                        • Size 5KB
                        • SHA256 e928188d36a5a25ae3675476f4b79f88f8a817e2ecd9b1a4c913d9e463c30c93
                        • MD5 SHA1 SHA512 SSDEEP
                        Submit Download

                        memory/4680-11994-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11997-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11982-0x000001C0D20B0000-0x000001C0D20B1000-memory.dmp
                        Download

                        memory/4680-11984-0x000001C0D21F0000-0x000001C0D21F1000-memory.dmp
                        Download

                        memory/4680-11986-0x000001C0D21F0000-0x000001C0D21F1000-memory.dmp
                        Download

                        memory/4680-11987-0x000001C0D2200000-0x000001C0D2201000-memory.dmp
                        Download

                        memory/4680-11988-0x000001C0D2200000-0x000001C0D2201000-memory.dmp
                        Download

                        memory/4680-11989-0x000001C0D2200000-0x000001C0D2201000-memory.dmp
                        Download

                        memory/4680-11990-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11991-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11992-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11993-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11947-0x000001C0C9D80000-0x000001C0C9D90000-memory.dmp
                        Download

                        memory/4680-11995-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11996-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11963-0x000001C0C9E80000-0x000001C0C9E90000-memory.dmp
                        Download

                        memory/4680-11998-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-11999-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12000-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12001-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12002-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12003-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12004-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12005-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12006-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12007-0x000001C0D2220000-0x000001C0D2221000-memory.dmp
                        Download

                        memory/4680-12008-0x000001C0D2230000-0x000001C0D2231000-memory.dmp
                        Download

                        memory/4680-12009-0x000001C0D2230000-0x000001C0D2231000-memory.dmp
                        Download

                        memory/4680-12010-0x000001C0D2340000-0x000001C0D2341000-memory.dmp
                        Download

                        memory/4680-12011-0x000001C0D2290000-0x000001C0D2291000-memory.dmp
                        Download

                        memory/4680-12012-0x000001C0D2290000-0x000001C0D2291000-memory.dmp
                        Download