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Analysis

  • max time kernel
    174s
  • max time network
    186s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/12/2023, 08:19

General

  • Target

    133f6d59b0922074f34b85cc18e5fc8c.exe

  • Size

    799KB

  • MD5

    133f6d59b0922074f34b85cc18e5fc8c

  • SHA1

    b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b

  • SHA256

    ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16

  • SHA512

    dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db

  • SSDEEP

    24576:9kBKLKWeLtatcD5b9IbloyS5l6jLpcCh5aHTlHLm:2QneLtUcDN9IblUz6vja8

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .nooa

  • offline_id

    PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-CnI3tI6Ktv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0322gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 11 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
    "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
      "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1144
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a60d409e-150e-4f5e-8978-5c975e4e7f70" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4900
      • C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
        "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4452
        • C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
          "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1952
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 568
            5⤵
            • Program crash
            PID:3004
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 568
            5⤵
            • Program crash
            PID:3908
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1952 -ip 1952
    1⤵
      PID:4796

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\a60d409e-150e-4f5e-8978-5c975e4e7f70\133f6d59b0922074f34b85cc18e5fc8c.exe

      Filesize

      799KB

      MD5

      133f6d59b0922074f34b85cc18e5fc8c

      SHA1

      b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b

      SHA256

      ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16

      SHA512

      dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db

    • memory/1144-18-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-20-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1144-26-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1952-30-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2996-1-0x0000000003270000-0x000000000330F000-memory.dmp

      Filesize

      636KB

    • memory/2996-2-0x0000000003310000-0x000000000342B000-memory.dmp

      Filesize

      1.1MB

    • memory/4452-23-0x00000000030B0000-0x0000000003143000-memory.dmp

      Filesize

      588KB