Analysis

  • max time kernel
    293s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    05/05/2024, 22:40

General

  • Target
    78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
  • Size 774KB
  • Sample240505-2lwffagc2x
  • SHA256 78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://cajgtus.com/test2/get.php

Attributes
  • extension

    .qehu

  • offline_id

    jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://cajgtus.com/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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0868PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 13 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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 3 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).

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
    "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1680
    • C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
      "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1752
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1ec618f9-8742-4e65-be84-2672254d1807" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2492
      • C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
        "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2604
        • C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
          "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:2484

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
        • Size 68KB
        • SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
        • MD5 SHA1 SHA512 SSDEEP

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 1KB
        • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 f38431b7bed43915d57b50c30b150244e2d2c74724936a7f37eedc04e0171628
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 344B
        • SHA256 8eacd59ae5071d53824b5e0f4a712e3bdcd556b3e4cdc4619b030d9e406fe8ac
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 fd9bdb80ffcb6406e37bba4d041ff8fe8bc0edce7aab73111d83029cdd5790ae
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 732b56fbd8c17440c05c928f18944d2f798abf5645bb3dfae4df9915824471bb
        • MD5 SHA1 SHA512

        78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe

        • Path C:\Users\Admin\AppData\Local\1ec618f9-8742-4e65-be84-2672254d1807\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
        • Size 774KB
        • SHA256 78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe
        • MD5 SHA1 SHA512 SSDEEP

        Tar12B7.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar12B7.tmp
        • Size 177KB
        • SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
        • MD5 SHA1 SHA512 SSDEEP

        memory/1680-1-0x0000000002BF0000-0x0000000002C82000-memory.dmp

        memory/1680-0-0x0000000002BF0000-0x0000000002C82000-memory.dmp

        memory/1680-6-0x0000000004470000-0x000000000458B000-memory.dmp

        memory/1752-46-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1752-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1752-7-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1752-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        memory/1752-8-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-67-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-50-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-66-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-68-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-71-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-74-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-73-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2484-75-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2604-47-0x0000000000320000-0x00000000003B2000-memory.dmp