Analysis

  • max time kernel
    110s
  • max time network
    126s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    27-11-2021 21:52

General

  • Target

    93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe

  • Size

    833KB

  • MD5

    20e6ade48db909d6b7b4552e0913d39d

  • SHA1

    53c08bccfc1fe30bd774c2685ec1746214999393

  • SHA256

    93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6

  • SHA512

    34dc43193668c23469fb54d55121c1f651b018c37effd7b54174614a70fb2befff31c9828aa4e8af95ca2d2626827c9d4bdf0cee330f97d673dece4e71b01c4b

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .rigj

  • offline_id

    Z5GGASEfY71jtxU3i3E8kzvrTJmY9oiZkjcSm0t1

  • payload_url

    http://kotob.top/dl/build2.exe

    http://tzgl.org/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-Tjb0YqckGX 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: 0353gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 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). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe
    "C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3088
    • C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe
      "C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4076
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\600a9247-7cfc-434f-92c6-1012b6b07b1d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4564
      • C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe
        "C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3192
        • C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe
          "C:\Users\Admin\AppData\Local\Temp\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4528

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    9dc67b11ad67886d83ec9cbf7922f317

    SHA1

    421eb58463bb0c726479bcc32f548de29991ebeb

    SHA256

    d2f4acc07d8bf2b562029cc85eec1b52bd37be9f276a927f565610e109308ead

    SHA512

    ea5995232251a3e161769484f6a49624f656ea94cc2545477daec56c3536736cee0f8554af535ca7a82e5fc687e5ee56c5955b32726b8c2c21d28c538d25b367

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    b3439cbad3deec29218c20b7294ccd3c

    SHA1

    01f1ecbc00e38042701d9969fd44466465ed3147

    SHA256

    80975f1efe7637a0b5cfd772b5eb35f7ad19e698ce674aacad7eb779c0f62249

    SHA512

    33fe0b38252890ef561a95f5ca661b8f3cc71df632c8939914869980672847dcd19527a0d9e1d79f274dc328b5aad5b5bf6229c4ab9ede0cb69d87d57af9d9c4

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    49cfe8a7eab81033d1f2b692d8e3645b

    SHA1

    b6b1cfdb8f10f16a3267882550e222596902bf45

    SHA256

    6d86bca4990584ab64079d0545bedf7845150671b19c8233c440af61b0dadf65

    SHA512

    0a6b44a92e322082923f1fe7d9a379e469294e1395537b458c6a29c7e430a6b112f287721599eba344fd8a1905851d3a1b351fb53bf6d6dd6cdf6f2eacc17fe5

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    89dcfc85a79bce38e5dcc84778bf268d

    SHA1

    f27692b4ba0d406d33a903cce552cc43f50d230a

    SHA256

    a9616d0df80712fca314b9ab86caba9f6e913bd1a7eb193a048f7570df93770d

    SHA512

    16447707656b703ae016a8350bb75bf56e83f22bda18c4f8e097cc132586dbbe9f16d82d1bd82846fc145a0f0c88e7b23019e9f7f12107da54fa447d2b47a0c2

  • C:\Users\Admin\AppData\Local\600a9247-7cfc-434f-92c6-1012b6b07b1d\93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6.exe

    MD5

    20e6ade48db909d6b7b4552e0913d39d

    SHA1

    53c08bccfc1fe30bd774c2685ec1746214999393

    SHA256

    93f638514869bca19b8cbb8a11fb790b90c19a3b829bd9b34b2a3fe4df04c2f6

    SHA512

    34dc43193668c23469fb54d55121c1f651b018c37effd7b54174614a70fb2befff31c9828aa4e8af95ca2d2626827c9d4bdf0cee330f97d673dece4e71b01c4b

  • memory/3088-118-0x0000000004FCB000-0x000000000505D000-memory.dmp

    Filesize

    584KB

  • memory/3088-119-0x00000000050A0000-0x00000000051BB000-memory.dmp

    Filesize

    1.1MB

  • memory/3192-125-0x0000000000000000-mapping.dmp

  • memory/4076-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4076-120-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4076-121-0x0000000000424141-mapping.dmp

  • memory/4528-128-0x0000000000424141-mapping.dmp

  • memory/4528-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4564-123-0x0000000000000000-mapping.dmp