Overview

overview

10

Static

static

1

2023-02-21...is.exe

windows7-x64

10

2023-02-21...is.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    70s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-02-2023 20:30

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General

  • Target

    2023-02-21_3797a1dd86bf2e8879d02cfc7c9fa601_crysis.exe

  • Size

    92KB

  • MD5

    3797a1dd86bf2e8879d02cfc7c9fa601

  • SHA1

    3df9dc4e19b52e449708bcddc3939ce662b69674

  • SHA256

    bd210c5759b815a64b7166aceae471ef622bccdde3b46fc971aa78bcb73f08f1

  • SHA512

    2970ffaca52a5776187120edb2cb8e6556ee8e052a4efe79c2d7d91a3e83c28a892266b271bfc22c1a9ab043ea9749bf76715453bdbe14167a13d3b54a84c82b

  • SSDEEP

    1536:mBwl+KXpsqN5vlwWYyhY9S4A6CJyQHFEH1OKZ3StXZsGXxq7y4PX:Qw+asqN5aW/hLoCJy6qV5ZigGhWP

Score
10/10
dharmapersistenceransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta

Ransom Note
All your files have been encrypted! Don't worry, you can return all your files! If you want to restore them, write to the mail: ronrivest@airmail.cc (roneast@tuta.io) YOUR ID ronivest@tutanota.com ------------------------------------------------------------------------------------------------------- https://tox.chat/download.html Free decryption as guarantee: Before paying you can send us up to 3 files for free decryption. The total size of files must be less than 3Mb (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

ronrivest@airmail.cc

roneast@tuta.io

ronivest@tutanota.com
URLs

https://tox.chat/download.html

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
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

    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). Likely ransomware behaviour.

  • 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\2023-02-21_3797a1dd86bf2e8879d02cfc7c9fa601_crysis.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-02-21_3797a1dd86bf2e8879d02cfc7c9fa601_crysis.exe"
    1⤵
    • Modifies extensions of user files
    • 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:2444
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4400
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:2428
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:1936
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:5792
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:5384
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:304
        • 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:3844
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:3616
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3368

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Initial Access

          Execution

          Persistence

          Registry Run Keys / Startup Folder

          1
          T1060

          Privilege Escalation

          Defense Evasion

          File Deletion

          2
          T1107

          Modify Registry

          1
          T1112

          Credential Access

          Credentials in Files

          1
          T1081

          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

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\chrome.7z.id-F86CCD94.[jerd@420blaze.it].jron
            Filesize

            285.5MB

            MD5

            8edf2ceaecd8f91206e1eccb408d1195

            SHA1

            698a1ccde9d4da18d79ce2a0e8033cf60b8cba24

            SHA256

            62cc33448e7a2effefcf141b6321e8dff241587480b8b345d5b52e93cd95cc19

            SHA512

            46f56f2985ce3bd71bf3d62da0a3d99954814a894a036cd48c2f59d3a818118fc4e426442f1cae9a3b266be3f5fc3a79a63c17a524fb9a28cec84ad2388ea4ff

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          • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
            Filesize

            4KB

            MD5

            a70392da3e6b29f6efadbb26aad4144c

            SHA1

            cfd58f8d16729d1bcf35ae81a0956209ead1dcd3

            SHA256

            f8e550d54f4d1b63c8cdda6ef84f364da12b6407c4a7b25adaecbb6e40e695e2

            SHA512

            84956fa9a901da26690516b455918812ccf6da43d25232975c5889a0f0afbab4eccedfad29a40b5211d7d5b4c4e5df81c806c51ad0bb4838aba07fb9ead72158

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

            4KB

            MD5

            a70392da3e6b29f6efadbb26aad4144c

            SHA1

            cfd58f8d16729d1bcf35ae81a0956209ead1dcd3

            SHA256

            f8e550d54f4d1b63c8cdda6ef84f364da12b6407c4a7b25adaecbb6e40e695e2

            SHA512

            84956fa9a901da26690516b455918812ccf6da43d25232975c5889a0f0afbab4eccedfad29a40b5211d7d5b4c4e5df81c806c51ad0bb4838aba07fb9ead72158

            Download Submit