Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 09:59

General

  • Target

    74660e011065ca6216f408d59cadf33e.exe

  • Size

    723KB

  • MD5

    74660e011065ca6216f408d59cadf33e

  • SHA1

    0ad378f1f469f5c57a1516aa05139eee4bda5e8e

  • SHA256

    de8f146808af12f7a609b39c56cf46d9d204ef2e717ff5b83422b7d7deb34739

  • SHA512

    1cd8adc191f35d905cbd5e28806d578203501530e58d6fbc21bbb321cd23f2a77931ec055e80b17445a7c0470c77353d659f9e1c116d4fddeb45d7f06f81f218

  • SSDEEP

    12288:Mr4xyEQyHNzX/d9kyUS9jyyMTvhHrxoMve/LWV3qgH7DJdmtfpec:Mr4x3HB1P0/ejS37bDJdm1p

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .orkf

  • offline_id

    4aBXQVNZ4BhjpMjt78QLIFtBSJPbgbflYLHrBut1

  • 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-ykQaS2tRyB 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: 0328gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 21 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (196) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • 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 4 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe
    "C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3308
    • C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe
      "C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:968
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3472
      • C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe
        "C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4152
        • C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe
          "C:\Users\Admin\AppData\Local\Temp\74660e011065ca6216f408d59cadf33e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1296
  • C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7\74660e011065ca6216f408d59cadf33e.exe
    C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7\74660e011065ca6216f408d59cadf33e.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4352
    • C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7\74660e011065ca6216f408d59cadf33e.exe
      C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7\74660e011065ca6216f408d59cadf33e.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4692

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          819d2f6d228f94bfebac03edbfa4bc64

          SHA1

          257acbdf2270c5285962d10460a77f422143cc8d

          SHA256

          e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47

          SHA512

          b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          775cae5d8e861b8b8850289a202d541e

          SHA1

          6a68b7c53d6c6e391ed7965eaf45ac4a94c1b9ee

          SHA256

          cd1751448972924e5255906534ee184348b9a44bb6e72c0164f0ac6271cc23c4

          SHA512

          9838f716bb09e71c97abc650a91a9b358430e53b70764a9d05e9ee0b1e0a0aacdb745c3696ee427adfa9b7fe044e7160817d98409c8581353f035fb7496bab3c

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          c1b5777d366096b61dc8c5748fe2934c

          SHA1

          3bf4120a193da89fdfda0988736cf6671d606b86

          SHA256

          f38a407dd6831fa72d6e16c53dbfe6566fba8e77f7cfbc7985f2532a5bf43a27

          SHA512

          f55c7caaf0ead5ac12a6f9d2ea95be8c7ba3b375d8552412a7b0da8af9626446a062f7ed7b5b17d5cc3919bae533fb6a94c1a4967fa88b2f5e43b7cbac1d5f89

        • C:\Users\Admin\AppData\Local\e4bc9c35-37e3-4295-9f34-515d63f424d7\74660e011065ca6216f408d59cadf33e.exe

          Filesize

          723KB

          MD5

          74660e011065ca6216f408d59cadf33e

          SHA1

          0ad378f1f469f5c57a1516aa05139eee4bda5e8e

          SHA256

          de8f146808af12f7a609b39c56cf46d9d204ef2e717ff5b83422b7d7deb34739

          SHA512

          1cd8adc191f35d905cbd5e28806d578203501530e58d6fbc21bbb321cd23f2a77931ec055e80b17445a7c0470c77353d659f9e1c116d4fddeb45d7f06f81f218

        • memory/968-15-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/968-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/968-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/968-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/968-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1296-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3308-2-0x0000000004C10000-0x0000000004D2B000-memory.dmp

          Filesize

          1.1MB

        • memory/3308-1-0x0000000004B70000-0x0000000004C0C000-memory.dmp

          Filesize

          624KB

        • memory/4152-18-0x0000000004810000-0x00000000048AF000-memory.dmp

          Filesize

          636KB

        • memory/4352-50-0x00000000048E0000-0x0000000004975000-memory.dmp

          Filesize

          596KB

        • memory/4692-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4692-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4692-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4692-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB