Overview

overview

10

Static

static

3

samples4.zip

windows7-x64

1

samples4.zip

windows10-2004-x64

1

0e60d49a96...01.exe

windows7-x64

0e60d49a96...01.exe

windows10-2004-x64

1ce5dd21fb...1e.exe

windows7-x64

10

1ce5dd21fb...1e.exe

windows10-2004-x64

10

3c73425d02...e6.exe

windows7-x64

6

3c73425d02...e6.exe

windows10-2004-x64

6

5df6314b5c...5b.exe

windows7-x64

10

5df6314b5c...5b.exe

windows10-2004-x64

10

5ee5166c02...93.exe

windows7-x64

10

5ee5166c02...93.exe

windows10-2004-x64

10

5f7cdd8c28...02.exe

windows7-x64

7

5f7cdd8c28...02.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    148s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    01/01/2024, 15:38

Sharing

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General

  • Target
    5df6314b5c6f6bd151a5fda104d32655c5bd8153be922b80069b22f1c1de9db3/5df6314b5c6f6bd151a5fda104d32655c5b.exe
  • Size 4.5MB
  • Sample240101-s2944adcem
  • SHA256 5df6314b5c6f6bd151a5fda104d32655c5bd8153be922b80069b22f1c1de9db3
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
dharmaevasionpersistenceransomwarespywarestealer

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! 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 CE303D24 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
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Renames multiple (314) files with added filename extension

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

    ransomware
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Drops startup file 5 IoCs
  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion
  • 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
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 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\5df6314b5c6f6bd151a5fda104d32655c5bd8153be922b80069b22f1c1de9db3\5df6314b5c6f6bd151a5fda104d32655c5b.exe
    "C:\Users\Admin\AppData\Local\Temp\5df6314b5c6f6bd151a5fda104d32655c5bd8153be922b80069b22f1c1de9db3\5df6314b5c6f6bd151a5fda104d32655c5b.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Drops startup file
    • Identifies Wine through registry keys
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1792
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2480
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1652
    • 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:3256
    • 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:3372
  • C:\Windows\system32\mode.com
    mode con cp select=1251
    1⤵
      PID:1812
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2600
    • C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      1⤵
      • Interacts with shadow copies
      PID:2796
    • C:\Windows\system32\mode.com
      mode con cp select=1251
      1⤵
        PID:3888
      • C:\Windows\system32\vssadmin.exe
        vssadmin delete shadows /all /quiet
        1⤵
        • Interacts with shadow copies
        PID:2680

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            OWOW64WW.cab.id-CE303D24.[[email protected]].bip
            • Path C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\OWOW64WW.cab.id-CE303D24.[[email protected]].bip
            • Size 2.0MB
            • SHA256 e187e1448ba2d84150dfbde0d9a474814b6fbb5f29562c49aea2501293cff3b4
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            Info.hta
            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
            • Size 13KB
            • SHA256 ac4b10173ce3d701b7f17f9171f2322a9b6d2915edd5ee00130042961ebc5c5a
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            memory/1792-0-0x0000000000400000-0x0000000000B54000-memory.dmp
            Download

            memory/1792-1-0x0000000077C20000-0x0000000077C22000-memory.dmp
            Download

            memory/1792-8-0x0000000000BD0000-0x0000000000BD1000-memory.dmp
            Download

            memory/1792-7-0x0000000000400000-0x0000000000B54000-memory.dmp
            Download

            memory/1792-11017-0x0000000000400000-0x0000000000B54000-memory.dmp
            Download

            memory/3372-20223-0x000007FFFFF80000-0x000007FFFFF90000-memory.dmp
            Download