Overview

overview

10

Static

static

3

2023-05-29...is.exe

windows7-x64

10

2023-05-29...is.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-05-2023 10:43

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General

  • Target

    2023-05-29_7821b1f09ffbf4810840b2f1b326ec77_crysis.exe

  • Size

    92KB

  • MD5

    7821b1f09ffbf4810840b2f1b326ec77

  • SHA1

    79dfb55c1413f5bd48a8783f8eabcea7981078a5

  • SHA256

    84b3135339c05c2271fff9c90d0d3845c84b4fde8defe62aa8a73d8616b24f8f

  • SHA512

    00f47a82af272923a13185a90c3247cf4fc17e04f79b06e05f2e9b54287ccf9a464c724946eb28ca351861399dc2e2154f67d3db982db3a5cb16c90087800a77

  • SSDEEP

    1536:mBwl+KXpsqN5vlwWYyhY9S4AvhQFlcykQLaR4zs4+a6qgHR:Qw+asqN5aW/hLJrxxdHR

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! Don't worry, you can return all your files! If you want to restore them, write to the mail: [email protected] YOUR ID [email protected] 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.

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 (469) files with added filename extension

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

    ransomware
  • Modifies extensions of user files 2 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).

  • 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\2023-05-29_7821b1f09ffbf4810840b2f1b326ec77_crysis.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-05-29_7821b1f09ffbf4810840b2f1b326ec77_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:2144
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:3520
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:1620
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:5336
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:5400
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:6068
        • 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:4440
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:5616
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2612

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe.id-8F9AC14B.[[email protected]].xCor
            Filesize

            2.9MB

            MD5

            8a462f4684648a43904cd20c7f18404a

            SHA1

            38800466190f4cacccbeb10f92ece225c63eaa38

            SHA256

            6e66dae1025ebdf4780b22116628c1841d69ab6918e8a3e69ba7f9603da39a45

            SHA512

            64917d4572553fc30f48f72dace703f4129a061eda3afabdf27ca5ab4268214e60561a0dadffc0fcb936486ef264d24f9d032b8ee4c47c17694a2a8b7b35c33a

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

            4KB

            MD5

            fb3491a7f9261713696d7a1a0bd66ab1

            SHA1

            dd6745e31e625867b4a80e8335fe1286c5700af4

            SHA256

            5c1204e46fae31db1db80be992936a5a7b9c01f7e4485a7c5cd341122ab3b83c

            SHA512

            c283f756aefe18fe1a31dcf87fe79aab7e8baee6bdb8e48c5c80556845548e2e23e80ca769eff6218b10956e86e20082f5425fc8cbcdc03f644c264820ddfb03

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

            4KB

            MD5

            fb3491a7f9261713696d7a1a0bd66ab1

            SHA1

            dd6745e31e625867b4a80e8335fe1286c5700af4

            SHA256

            5c1204e46fae31db1db80be992936a5a7b9c01f7e4485a7c5cd341122ab3b83c

            SHA512

            c283f756aefe18fe1a31dcf87fe79aab7e8baee6bdb8e48c5c80556845548e2e23e80ca769eff6218b10956e86e20082f5425fc8cbcdc03f644c264820ddfb03

            Download Submit