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
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-02-2023 20:29

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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
  • 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
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 28 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
    • 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:1556
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:840
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:472
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:1656
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1604
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:1528
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:1708
        • C:\Windows\System32\mshta.exe
          "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
          2⤵
          • Modifies Internet Explorer settings
          PID:700
        • C:\Windows\System32\mshta.exe
          "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
          2⤵
          • Modifies Internet Explorer settings
          PID:1988
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1788

      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

      2
      T1112

      Credential Access

      Credentials in Files

      1
      T1081

      Discovery

      System Information Discovery

      1
      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:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\osetup.dll.id-691DFF6B.[jerd@420blaze.it].jron
        Filesize

        6.3MB

        MD5

        64793280a7a6f62c1a923af400bc177a

        SHA1

        4bda4a8af7dbe5a0913470701ef8c2da982dad4d

        SHA256

        23208067717cfe87f4eaaea67a2fecb0ed2f7468fbdd5c8114f40d71aa772b46

        SHA512

        e654821a3220b7fffbbd3409ee7191f248ba3c6cc3397d3967c440240ff5515384fa33077b5dc01910927cd12029e0ec3cee5f89c0f2a9da60fc8b528f0c7bf4

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

        4KB

        MD5

        f9f28ec9034dcbd71134eca2fb05f667

        SHA1

        eee933c1a6cf0824501a66f4e03c42b4c1c0dc66

        SHA256

        aa660beb12d3a756ef482a307fd2e75ebc8e7f84130d611b45d8f655e299466b

        SHA512

        9c4cced2df6c10cd1dc08570cdb3f1ec20b850569f2027a2329e69bbe77480521827a3600cddc8edcb6b4af7b5a3735b4fbdd0cf6271825cbf8c05725868845f

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

        4KB

        MD5

        f9f28ec9034dcbd71134eca2fb05f667

        SHA1

        eee933c1a6cf0824501a66f4e03c42b4c1c0dc66

        SHA256

        aa660beb12d3a756ef482a307fd2e75ebc8e7f84130d611b45d8f655e299466b

        SHA512

        9c4cced2df6c10cd1dc08570cdb3f1ec20b850569f2027a2329e69bbe77480521827a3600cddc8edcb6b4af7b5a3735b4fbdd0cf6271825cbf8c05725868845f

        Download Submit
      • memory/1988-20144-0x000007FFFFF90000-0x000007FFFFFA0000-memory.dmp
        Filesize

        64KB

        Download