Overview

overview

10

Static

static

7

Lecture13.exe

windows7-x64

10

Lecture13.exe

windows10-2004-x64

10

Resubmissions

20-04-2024 20:00

240420-yq739age58 10

20-04-2024 19:55

240420-ym7y3sha3x 10

Analysis

  • max time kernel
    190s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    20-04-2024 19:55

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General

  • Target

    Lecture13.exe

  • Size

    581KB

  • MD5

    ef5a79a25dba6d0326cfd3649733997f

  • SHA1

    028c9978bf83c92fbeabde7385fc72e9dcdf3687

  • SHA256

    3f05a04c0f8fe2afb55e3c56034587edfa8fa6edd6c44725fed4c4bd8bd03135

  • SHA512

    ec542d405c1490f6f715ac1d49de9ba7f4cf3d0a9b9cba5f0512af8068e57b5bbb07e474b307cd39e137cd6a8565f9fd16fdcbbebef06b6e2ab73b167585d13a

  • SSDEEP

    12288:iLCMgX/tPAyOWyRanlo0/MQorIQQ4ijZX7EIHaIIan64Gn0PkQ9cqDbNV763o+RR:iRgPtPfZ9loCpQQvjh7EIHaOt/PkQyuy

Score
10/10
dharmapersistenceransomwarespywarestealerupx

Malware Config

Extracted

Path

C:\ProgramData\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 [email protected] Write this ID in the title of your message 638FD19E In case of no answer in 24 hours write us to theese e-mails: [email protected] 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.

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 (312) 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
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • 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\Lecture13.exe
    "C:\Users\Admin\AppData\Local\Temp\Lecture13.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:2804
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3064
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:2336
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:1480
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:216
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:232
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:2096
        • 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:2928
        • 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:696
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1708

      Network

      MITRE ATT&CK Enterprise v15

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      Downloads

      • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\Office64WW.msi.id-638FD19E.[[email protected]].ncov
        Filesize

        3.6MB

        MD5

        273766d3172971eb2ac840addb80cbc8

        SHA1

        38415b6c6c9a69f96104db8f9c60140f5a3780d8

        SHA256

        14fe53c3ccf57a82ff8e2363c1dd1bce99f4ee6acaebbcffa74ec25a9a1d251d

        SHA512

        471bfd0f32b02723934599f1cadb2618e058b34100f253ae833f4f948070bb113079804fd867ab1a192c9ea71aa06adc682af4d3f351156053cd99e8b5b6aac5

        Download Submit

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

        13KB

        MD5

        be2bac93b7a3d5975204033a5c022557

        SHA1

        8a01afb435dfe1238fac9fbc4ca50597cd4f2a03

        SHA256

        12c71ec9d53937bdf61e7d75eba16f890b0c71ee779ee5fb897a49ce289b3e47

        SHA512

        3e9e0b47dfd585567c6f42422b6ce119c10c4d8455a950ae2c435768c804454bfce499ba2aa527128236c4b3abd699b0caafafd9315e044b42a3ae8a9e8ebfd4

        Download Submit

      • memory/2804-0-0x0000000000400000-0x0000000000580000-memory.dmp

        Filesize

        1.5MB

        Download

      • memory/2804-1-0x0000000000400000-0x0000000000580000-memory.dmp

        Filesize

        1.5MB

        Download

      • memory/2804-3-0x000000000A8D0000-0x000000000A904000-memory.dmp

        Filesize

        208KB

        Download

      • memory/2804-4-0x0000000000400000-0x0000000000580000-memory.dmp

        Filesize

        1.5MB

        Download

      • memory/2804-2153-0x0000000000400000-0x0000000000580000-memory.dmp

        Filesize

        1.5MB

        Download

      • memory/2804-7490-0x000000000A8D0000-0x000000000A904000-memory.dmp

        Filesize

        208KB

        Download

      • memory/2928-20082-0x000007FFFFF80000-0x000007FFFFF90000-memory.dmp

        Filesize

        64KB

        Download