Overview

overview

10

Static

static

10

b6c644a164...ae.exe

windows7-x64

10

b6c644a164...ae.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-04-2024 12:17

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General

  • Target

    b6c644a1644dd9b81a604fb6ad6a8cebf4a9b14d5c41da633a93ba2f459f31ae.exe

  • Size

    92KB

  • MD5

    ff9af6e3beebc9df0146f515f68e004e

  • SHA1

    f57248526065852ecb491e871160cf1cb23ae22f

  • SHA256

    b6c644a1644dd9b81a604fb6ad6a8cebf4a9b14d5c41da633a93ba2f459f31ae

  • SHA512

    49bcad9e25613bcb90dcc851a4759cd6e79afc39bd21f32bebe82aebad61b01ad49359527ca2450bdc05331f2c461ad443f976bc52122419e2a9dde9080c7fb5

  • SSDEEP

    1536:mBwl+KXpsqN5vlwWYyhY9S4AqXeiKozyHj0vThU2BHYZsX3AZMgLzw4g:Qw+asqN5aW/hLMXeHoYQbhvYZD84

Score
10/10
dharmapersistenceransomwarespywarestealer

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 boston.crypt@tuta.io Write this ID in the title of your message DDF3B10C In case of no answer in 24 hours write us to theese e-mails: boston.crypt@tuta.io 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.
Emails

boston.crypt@tuta.io

Signatures

  • Dharma

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

    ransomwaredharma
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Renames multiple (497) files with added filename extension

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

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 5 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 3 IoCs
    persistence
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 2 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • 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\b6c644a1644dd9b81a604fb6ad6a8cebf4a9b14d5c41da633a93ba2f459f31ae.exe
    "C:\Users\Admin\AppData\Local\Temp\b6c644a1644dd9b81a604fb6ad6a8cebf4a9b14d5c41da633a93ba2f459f31ae.exe"
    1⤵
    • Checks computer location settings
    • 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:700
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3236
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:3036
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:6684
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3524
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:4112
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:5160
        • C:\Windows\System32\mshta.exe
          "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
          2⤵
            PID:5524
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:4904
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:6384

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Initial Access

          Execution

          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

          2
          T1070

          File Deletion

          2
          T1070.004

          Modify Registry

          1
          T1112

          Credential Access

          Unsecured Credentials

          1
          T1552

          Credentials In Files

          1
          T1552.001

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Lateral Movement

          Collection

          Data from Local System

          1
          T1005

          Exfiltration

          Command and Control

          Impact

          Inhibit System Recovery

          2
          T1490

          Resource Development

          Reconnaissance

          Replay Monitor

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          Downloads

          • C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe.id-DDF3B10C.[boston.crypt@tuta.io].boost
            Filesize

            2.9MB

            MD5

            b2aafeb71f39dd96f5351f2b932225bb

            SHA1

            7b86a6dfbbd87878aa4c1b13a6cc07d9b7f477c1

            SHA256

            a12360cc342220c11cb4da3593ca0b6912c519a6ce121dc86830a16edf75cde3

            SHA512

            386e2da20e400fdb9550ec870079fdcf111362b3fdf91536dfb85e0c849dde99c5cb70532c3cffacdd0acdd4be9d45a5f021f5e10319ea88a40b324c57c641e9

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          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
            Filesize

            13KB

            MD5

            036c66528dd05d8ad4c486876014cf22

            SHA1

            557ccc242cbb4c0c1d56eb6fe8b2aad89d5c00ac

            SHA256

            7968535806255059ff04e696f11b1a1a3dc47c265035aca29db7e7b368876735

            SHA512

            5fbbfde4914a62d7318446043a7b0a8cafa9441add7db91dcfb6f729376a5bf7cc7788a102b873c887f37f9243b4ddd4cd34b1786d39d613a5125d90b54552c5

            Download Submit