Analysis

  • max time kernel
    152s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    01/01/2024, 15:12

General

  • Target
    71506a3322b0e0bc6fc2c1a1f0ac844a82a8c3fbbfeb4e6452013b4ade7610fb.exe
  • Size 597KB
  • Sample240101-sladjafeg6
  • SHA256 71506a3322b0e0bc6fc2c1a1f0ac844a82a8c3fbbfeb4e6452013b4ade7610fb
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\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 F3A6D0AA In case of no answer in 24 hours write us to theese e-mails: [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 decryption tool that will decrypt all your files. Free decryption as guarantee Before paying you can send us up to 1 file for free decryption. The total size of files must be less than 1Mb (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

  • Detect ZGRat V2 1 IoCs
  • Dharma

    Dharma is a ransomware that uses security software installation to hide malicious activities.

  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (312) files with added filename extension

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

  • Drops startup file 5 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 2 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • 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\71506a3322b0e0bc6fc2c1a1f0ac844a82a8c3fbbfeb4e6452013b4ade7610fb.exe
    "C:\Users\Admin\AppData\Local\Temp\71506a3322b0e0bc6fc2c1a1f0ac844a82a8c3fbbfeb4e6452013b4ade7610fb.exe"
    1⤵
    • Maps connected drives based on registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2856
    • C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\SysWOW64\msiexec.exe
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2652
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1256
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          4⤵
            PID:2940
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:2096
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3888
          • C:\Windows\system32\mode.com
            mode con cp select=1251
            4⤵
              PID:3992
            • C:\Windows\system32\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:3808
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            3⤵
            • Modifies Internet Explorer settings
            PID:3764
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            3⤵
            • Modifies Internet Explorer settings
            PID:3032
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1556

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            OWOW64WW.cab.id-F3A6D0AA.[[email protected]].gdb

            • Path C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\OWOW64WW.cab.id-F3A6D0AA.[[email protected]].gdb
            • Size 15.9MB
            • SHA256 f8e6f2623a7b42a60f87c8d72a9981f9e39f0f129a9349c6dbcc8f8d9d610941
            • MD5 SHA1 SHA512 SSDEEP

            Info.hta

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
            • Size 13KB
            • SHA256 33a62caba2eec5f3966c5b3f01d8b6cf68553c70cceb435eda04d2ae16e9bee2
            • MD5 SHA1 SHA512 SSDEEP

            memory/2652-12-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-38-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-22-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-17-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-13-0x00000000000E0000-0x00000000000E1000-memory.dmp

            memory/2652-11-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-9-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2652-10-0x0000000000400000-0x0000000000429000-memory.dmp

            memory/2856-8-0x00000000049A0000-0x00000000049E0000-memory.dmp

            memory/2856-7-0x00000000049A0000-0x00000000049E0000-memory.dmp

            memory/2856-1-0x0000000074480000-0x0000000074B6E000-memory.dmp

            memory/2856-6-0x0000000074480000-0x0000000074B6E000-memory.dmp

            memory/2856-4-0x0000000004720000-0x0000000004764000-memory.dmp

            memory/2856-3-0x00000000049A0000-0x00000000049E0000-memory.dmp

            memory/2856-2-0x00000000049A0000-0x00000000049E0000-memory.dmp

            memory/2856-9214-0x0000000074480000-0x0000000074B6E000-memory.dmp

            memory/2856-0-0x00000000000F0000-0x000000000018C000-memory.dmp