Analysis

  • max time kernel
    56s
  • max time network
    25s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-11-2024 18:55

General

  • Target

    omg its fucking CRYSIS.exe

  • Size

    420KB

  • MD5

    859553e76bcfb7c19bbf1ad1290b360c

  • SHA1

    6a71def09b4b0058ca6f0b077a93c22b4eb63082

  • SHA256

    970959bc3aef1c6198b105a4983599ea566f29ca26f307258f86d0a6585502f4

  • SHA512

    100dc319e1082da1f4a2d779642c785a89b2e00272ee85390c4cdcaa589ed0091eacdda5fc06ac9a87ea025b4fe0be62323ba51bd34b7968d96d8859f0676d2b

  • SSDEEP

    12288:YLcVB4j5CW1p3vE1eqFs5WkdsvG9iCNY5:YQVioWX/E1e59s+9iCNk

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 CD3742C0 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.

  • Dharma family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (313) files with added filename extension

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

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Drops startup file 5 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 4 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Interacts with shadow copies 3 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\omg its fucking CRYSIS.exe
    "C:\Users\Admin\AppData\Local\Temp\omg its fucking CRYSIS.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1356
    • C:\Users\Admin\AppData\Local\Temp\omg its fucking CRYSIS.exe
      "C:\Users\Admin\AppData\Local\Temp\omg its fucking CRYSIS.exe"
      2⤵
      • 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
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3036
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1636
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          4⤵
            PID:2800
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:1552
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1752
          • C:\Windows\system32\mode.com
            mode con cp select=1251
            4⤵
              PID:2736
            • C:\Windows\system32\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:3344
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            3⤵
            • Modifies Internet Explorer settings
            PID:2748
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            3⤵
            • Modifies Internet Explorer settings
            PID:2704
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2640

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\OWOW64WW.cab.id-CD3742C0.[[email protected]].bot

        Filesize

        23.5MB

        MD5

        34dccdd382e053581d232e81395ba0c0

        SHA1

        0e308f49ae16fd0c838129440628c2daf8f3f768

        SHA256

        e9a3d44a849b5595e1c8fc3889dde6e158f030d6f250f3ecdf0a6733210d895c

        SHA512

        3a271a5d232a864a7c9973e2bd0764d2d8f3ec7af8693727094b8c7dcf1d9d4c24fa55d07e25c27e1b37ffdb8f0303f42e066ee824831a5f2b000c90c8b51832

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

        Filesize

        13KB

        MD5

        f25ccd5c16ac1127daac042a84a08184

        SHA1

        b5db096b8aad533d4091bc031dc9db0d7a1b69af

        SHA256

        cdbc885e4f5c423e595b72ae4797c6c919cc533162fb67d56e6220b58ba7bf76

        SHA512

        bb06ca703f8c79190a6af3c95f05caca564c1310cc77c156f68825382ba94a0e329976dc3d5402c570a396ce68d92a7fdf1f760762336205c7e9bd12ed2716cd

      • memory/1356-0-0x0000000000400000-0x00000000004F6000-memory.dmp

        Filesize

        984KB

      • memory/1356-1-0x0000000000400000-0x00000000004F6000-memory.dmp

        Filesize

        984KB

      • memory/1356-3-0x0000000000530000-0x0000000000563000-memory.dmp

        Filesize

        204KB

      • memory/1356-4-0x0000000002A70000-0x0000000002B66000-memory.dmp

        Filesize

        984KB

      • memory/1356-9-0x0000000000400000-0x00000000004F6000-memory.dmp

        Filesize

        984KB

      • memory/1356-10-0x0000000000530000-0x0000000000563000-memory.dmp

        Filesize

        204KB

      • memory/2748-20362-0x000007FFFFF80000-0x000007FFFFF90000-memory.dmp

        Filesize

        64KB

      • memory/3036-10858-0x0000000000400000-0x0000000000419000-memory.dmp

        Filesize

        100KB