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
    285s
  • max time network
    287s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-04-2024 20:00

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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 81341852 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 (515) files with added filename extension

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

    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
  • UPX packed file 3 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
  • 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\Lecture13.exe
    "C:\Users\Admin\AppData\Local\Temp\Lecture13.exe"
    1⤵
    • 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:3852
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2404
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:6532
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:17276
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:28804
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:26136
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:26944
        • 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:26752
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:26820
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:19588

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems32.dll.id-81341852.[[email protected]].ncov
            Filesize

            2.7MB

            MD5

            90261fe242b59045d512694abd649a53

            SHA1

            2e2d96d0447e5dd5cc6abd3f02f47fc722927d35

            SHA256

            92d88b35117f0cb5f4b5c323091714ac8563b6b95525b1932f0cee49e016ffdb

            SHA512

            4ef5d743fccc6819ee4d23b8a9ed90ce229c3a46753f5286a1e5a888f6593fe29dab7f8096a2988901ee79e3fe858b896acae49f8f0d56058b70e595523c2f5f

            Download Submit

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

            13KB

            MD5

            68d17f2c43766975d9452cd9bed1cd2a

            SHA1

            047836842370910f92766f959d26e39038d668ba

            SHA256

            5fe72edbc981cf42d5ef407c56ce73264477429a8d0c6c1232eb8cab392d30eb

            SHA512

            996bcf028fafc5d1d6df448234f42d24f01c3d4d5c1352b3c014ad35b864466b4cc4f6641e7ba694d715e10d6ff13ad42a34a69eddcd377708b02811f4375ed2

            Download Submit

          • memory/3852-0-0x0000000000400000-0x0000000000580000-memory.dmp

            Filesize

            1.5MB

            Download

          • memory/3852-1-0x0000000000400000-0x0000000000580000-memory.dmp

            Filesize

            1.5MB

            Download

          • memory/3852-2-0x0000000000400000-0x0000000000580000-memory.dmp

            Filesize

            1.5MB

            Download

          • memory/3852-3-0x000000000ADC0000-0x000000000ADF4000-memory.dmp

            Filesize

            208KB

            Download

          • memory/3852-4-0x0000000000400000-0x0000000000580000-memory.dmp

            Filesize

            1.5MB

            Download

          • memory/3852-8428-0x0000000000400000-0x0000000000580000-memory.dmp

            Filesize

            1.5MB

            Download