Analysis

  • max time kernel
    111s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    27-11-2021 14:31

General

  • Target

    f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe

  • Size

    833KB

  • MD5

    f22dd33b0020a93f8c36826be72844bf

  • SHA1

    a524eade2d077afce79e6aa6058c8e734efaa30e

  • SHA256

    f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431

  • SHA512

    dcc59ef484534ea629294e88cbe3525d2effcd8f953cdf798269b8ed0672a76bf38ab5713e8dd33640d7ee76ea5992489b31d3d041b1299784cc5430d4d73f07

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.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • 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\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe
    "C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3708
    • C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe
      "C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4216
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e4b88ed5-5c27-4904-9526-6fc74de92aa3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4228
      • C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe
        "C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4504
        • C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe
          "C:\Users\Admin\AppData\Local\Temp\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3208

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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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

    253607bd1141add4ad448bbedd594216

    SHA1

    cdee5efeb47a38564455a125631c665635245a95

    SHA256

    afa5b10e6377fc9fa4cd64dd3500ce86228a4c38022e572077ff4961cd538c6a

    SHA512

    96826e7a6b88bbedd1c574835aab3a5ebd991d0614d69a1d22f03346287baf74975049ade534ed84f799ecbd85c3abfe3e6d1cdf59bd40c437a435232c4be13b

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

    MD5

    88ee0eb50c73cb91b16733fe602861ba

    SHA1

    167fa6cd920f9837b0072a05213fbad9b421ed9f

    SHA256

    bdee5d8586859b0de004f7187d4d75fad9de8f559c79a1e938db15ec81d8bb44

    SHA512

    4a544408fc215611854fa188cc0d1e501243e45a137224cfa0b1c1f32022532254e5017ca310abaeb699c25a45a1afc49c948c0f77e7cee6520e204e4440386c

  • C:\Users\Admin\AppData\Local\e4b88ed5-5c27-4904-9526-6fc74de92aa3\f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431.exe

    MD5

    f22dd33b0020a93f8c36826be72844bf

    SHA1

    a524eade2d077afce79e6aa6058c8e734efaa30e

    SHA256

    f368a6b07e5974a2f77af9ca7c15e7ed259c6c64d1ed89001f747cd7a97c0431

    SHA512

    dcc59ef484534ea629294e88cbe3525d2effcd8f953cdf798269b8ed0672a76bf38ab5713e8dd33640d7ee76ea5992489b31d3d041b1299784cc5430d4d73f07

  • memory/3208-128-0x0000000000424141-mapping.dmp

  • memory/3208-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3708-118-0x000000000508A000-0x000000000511B000-memory.dmp

    Filesize

    580KB

  • memory/3708-121-0x0000000005120000-0x000000000523B000-memory.dmp

    Filesize

    1.1MB

  • memory/4216-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4216-120-0x0000000000424141-mapping.dmp

  • memory/4216-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4228-123-0x0000000000000000-mapping.dmp

  • memory/4504-125-0x0000000000000000-mapping.dmp

  • memory/4504-126-0x0000000004F18000-0x0000000004FA9000-memory.dmp

    Filesize

    580KB