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
    30s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-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: xcorp@decoymail.mx YOUR ID whisper@mailfence.com 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

xcorp@decoymail.mx

whisper@mailfence.com

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 (311) files with added filename extension

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

    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).

  • 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\2023-05-29_7821b1f09ffbf4810840b2f1b326ec77_crysis.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-05-29_7821b1f09ffbf4810840b2f1b326ec77_crysis.exe"
    1⤵
    • 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:1760
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:624
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:320
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:968
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3040
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:824
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:1996
        • 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:852
        • 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:344
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1812

      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

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      Downloads

      • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\OWOW64WW.cab.id-FBEF6C91.[xcorp@decoymail.mx].xCor
        Filesize

        23.5MB

        MD5

        f443fc5d06aca6aef5bd54f2639a77f9

        SHA1

        32ffb24eaeba0d5e1ba50aed047333fa690d2f42

        SHA256

        e17ed26e97c4d59373cbe29bef15e166d750b03c75878de29d10d8293c9eb3c8

        SHA512

        1dfe4733228e7c0c89075ddfa85df554084448c1e3a19080dc7abd8e100084bf1e756a70932c3c806c92479a1456b4ddee5fc4bdb471104556e4f90ad7e923d0

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

        4KB

        MD5

        6a7cca653dbdeb4af6493996d12d8893

        SHA1

        b3bdea022291e877493ba9502f50d8d3cb6f5403

        SHA256

        ae738d1b6cd1ee1363e441f6d31c0e1b97660e58799d6fd3618687ed8586e56d

        SHA512

        f663191086ec69f955c7a287ff9a958b55ef4eca1ec74f128ed80dbe48f23e28a9fa86bc6f4d6e51e16d6598bf9e36df95a995904186638e2d5ab8f721d24453

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

        4KB

        MD5

        6a7cca653dbdeb4af6493996d12d8893

        SHA1

        b3bdea022291e877493ba9502f50d8d3cb6f5403

        SHA256

        ae738d1b6cd1ee1363e441f6d31c0e1b97660e58799d6fd3618687ed8586e56d

        SHA512

        f663191086ec69f955c7a287ff9a958b55ef4eca1ec74f128ed80dbe48f23e28a9fa86bc6f4d6e51e16d6598bf9e36df95a995904186638e2d5ab8f721d24453

        Download Submit
      • memory/852-20123-0x000007FFFFF90000-0x000007FFFFFA0000-memory.dmp
        Filesize

        64KB

        Download