Analysis

  • max time kernel
    142s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    28/01/2024, 04:22

General

  • Target

    7c2428bc20c16c8fd744c1216032336e.exe

  • Size

    744KB

  • MD5

    7c2428bc20c16c8fd744c1216032336e

  • SHA1

    eed631c49a30baf635422abbffe2ef95b06eaec0

  • SHA256

    2a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb

  • SHA512

    19f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88

  • SSDEEP

    12288:0YceV2ak78+GXU3yXSaqqKnr8feg7UxcpRbr1JCnoCpHpYBFDq6XwoO:0mV2ak78Pk3MSzvnSB4xcRv1JwoCHYBp

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .nooa

  • offline_id

    PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1

  • 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-CnI3tI6Ktv 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: 0322gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 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).

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
    "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
      "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2224
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b7457ef8-8382-4409-906a-8322cca04a35" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2592
      • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
        "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2904
        • C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe
          "C:\Users\Admin\AppData\Local\Temp\7c2428bc20c16c8fd744c1216032336e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2608

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

          b40baee421e93a6145908f67787a291a

          SHA1

          311874de97781222e06810a295e2f78a67b84f81

          SHA256

          25d9d82b04a8a02ccdf9e5980ff2749edcae335faf854d05e24a4a42b35bfa17

          SHA512

          77ceb1d112977f51b89484cbf29c7e299b9e44ba8e8f3daba20cfc71782b2cb1de99c58aaeae4f9741cb13a7389743863927cec42036666e3acf980be2cfd935

        • 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

          707d9a15027b3f8639b348621028e493

          SHA1

          2b935cf02e98d337a37caddf49804552fc93040a

          SHA256

          76bfbecaa87db84c07e50f24fdcfb9e70c976cb96c6d5ff291b0b59e1a9c9b16

          SHA512

          88a7c37e44f1aa7d0e9a317daf2d0e76ec52c801761eff494337be05a14a565fca6ec38810f890b3d22a3c1c6f382dfb41b451e05eb2a48fb47f7df8b57c8b68

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          17f6020649f5793ae98f14daf0fab546

          SHA1

          0b8c25f260b664d77f967ee4c9bb16a8c22c0056

          SHA256

          34ccb6a63785a376928457201aa24950e23c0462a09a855c0498a45166af9456

          SHA512

          6e82127fc8a4e56c2c88e60ef51ff4a868cd649e9fcec905b7173db539c59cd8a210d79a7fe4d0dd198e949b0c4532bbbea320f500b2e200fe939c8e82a00b38

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

          Filesize

          392B

          MD5

          d8e9a9e4130b15b18a3063fba8fe8c0e

          SHA1

          25a3e87a452f9f6e3f88a042c7428e20d1abc468

          SHA256

          9dcbf787433a6ad8e684de0662466aeae178f87349e94158ae51aa76cdbdb333

          SHA512

          d2cca10e2b5a2f3ba748d660421c4bd043f0091b068341cd42454ad7a6cde27270338ea6223d4574436f0b304e6c3646cb97fa5c17e2877ebec82ef9f64cfa3a

        • C:\Users\Admin\AppData\Local\Temp\Cab8739.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\b7457ef8-8382-4409-906a-8322cca04a35\7c2428bc20c16c8fd744c1216032336e.exe

          Filesize

          744KB

          MD5

          7c2428bc20c16c8fd744c1216032336e

          SHA1

          eed631c49a30baf635422abbffe2ef95b06eaec0

          SHA256

          2a8a855ea51edbb8079331fafdb95680727e210756efaa00f2dec1fa60bfe2bb

          SHA512

          19f63de6c09e3124a685da026e916225ab0949d766df83b38f5eedc17186f34dd83688066b2adfa8158df7b015eeace3a00eb599cd25bde952ae8e653a03fd88

        • memory/1700-1-0x0000000002D00000-0x0000000002D92000-memory.dmp

          Filesize

          584KB

        • memory/1700-2-0x0000000004630000-0x000000000474B000-memory.dmp

          Filesize

          1.1MB

        • memory/1700-0-0x0000000002D00000-0x0000000002D92000-memory.dmp

          Filesize

          584KB

        • memory/2224-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2224-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2224-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2224-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2224-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-52-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-61-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-60-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-62-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-63-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2904-31-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2904-29-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2904-57-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB