Analysis

  • max time kernel
    118s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    28-11-2021 03:34

General

  • Target

    3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe

  • Size

    834KB

  • MD5

    9bdabffd2de4de7217bd3cf724264bca

  • SHA1

    b9abda8c97459e28161f8fb5fc61ffa2e0c49483

  • SHA256

    3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6

  • SHA512

    444a7aee018613dbe97efa1fc7387b2949338f9bf64e63434a53996fc95a3de594928fa3f93be53d0a694acafa0f96ae65da7577b0007b66169073efbf96f001

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\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe
    "C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3620
    • C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe
      "C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:432
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c6b20c6b-4f4b-44ce-a74e-cdee8f36a0b0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4076
      • C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe
        "C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4212
        • C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe
          "C:\Users\Admin\AppData\Local\Temp\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3200

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

    4d8d50ec0f813cd404a7642689c95b2f

    SHA1

    66a3ead6c0b92b6db3d09c4a2fe16841c3f69e8f

    SHA256

    1553022ba5e5423f9fb5da8ab130a963fecaee99753f01de10a5651bac2fdb24

    SHA512

    54acf5e216cc7552187a2ef664d6249be71dd30b4735a503a579f2a085080a027562a95fc428d2b0c7cf2e5414e185380e1fd90d219884ce5d18559725ceb38a

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

    MD5

    96ed956fce332f6d1ca34f97616d7075

    SHA1

    b3ecd3f2cf8bfe4df7edb6e484d7f6d459bbc2c7

    SHA256

    9d72765676317f2d6a8bf1d6e91ee57b4d51043f95b19875370cceed8082b983

    SHA512

    925520a3b6bc74107322bea9bbf7670e5b526efdcdd77ea780c472803d25a9792f014137a729d5efe873b84867e4c6117e20b674305f929cdb7329df1310fe72

  • C:\Users\Admin\AppData\Local\c6b20c6b-4f4b-44ce-a74e-cdee8f36a0b0\3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6.exe

    MD5

    9bdabffd2de4de7217bd3cf724264bca

    SHA1

    b9abda8c97459e28161f8fb5fc61ffa2e0c49483

    SHA256

    3b8b7059cc6b91698fb241feca65ea30b321dc918a59809bf57191af2c6e63a6

    SHA512

    444a7aee018613dbe97efa1fc7387b2949338f9bf64e63434a53996fc95a3de594928fa3f93be53d0a694acafa0f96ae65da7577b0007b66169073efbf96f001

  • memory/432-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/432-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/432-120-0x0000000000424141-mapping.dmp

  • memory/3200-128-0x0000000000424141-mapping.dmp

  • memory/3200-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3620-121-0x0000000005140000-0x000000000525B000-memory.dmp

    Filesize

    1.1MB

  • memory/3620-118-0x0000000003526000-0x00000000035B8000-memory.dmp

    Filesize

    584KB

  • memory/4076-123-0x0000000000000000-mapping.dmp

  • memory/4212-125-0x0000000000000000-mapping.dmp

  • memory/4212-126-0x0000000004EEB000-0x0000000004F7D000-memory.dmp

    Filesize

    584KB