Analysis

  • max time kernel
    145s
  • max time network
    146s
  • 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, 08:49

General

  • Target

    7441a4ce9c4e8ac5928eed31e78d925c.exe

  • Size

    783KB

  • MD5

    7441a4ce9c4e8ac5928eed31e78d925c

  • SHA1

    7cacc24fbfb677bfadd4685d5f7820a946a44448

  • SHA256

    3a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470

  • SHA512

    bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df

  • SSDEEP

    24576:OKflY4gwkcHJwM2mpL6di/wQyZaTzUC/B:OEgwZwlmB6ClbnB

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 (182) 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\7441a4ce9c4e8ac5928eed31e78d925c.exe
    "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3216
    • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
      "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3316
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3572
      • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
        "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4868
        • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
          "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2088
  • C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe
    C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:448
    • C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe
      C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1120

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

          a8f57f9fc60e110005c59da12cc933d8

          SHA1

          36ebdd4a5b771c3b146573bc8ececd3b1cc2675b

          SHA256

          1b14bf746e2b2b854de0b9da31ddd652a3058c39f0a3251c1608db80f660d049

          SHA512

          9d36bdf382665f90804c033bc5fc7af8b5aced57f7d3f795d15d205eb7353c03d46fa04cc1b426087cece19048294140f6a6f3d566b8605bada8c66fed9b0094

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

          Filesize

          392B

          MD5

          02f35a2d8cd3130c3be18c2eb00e1fe1

          SHA1

          dce0dc82612d7234f8a9c2e2828ddb96afb5d7f5

          SHA256

          c086f01ecb771beb99b1bf146b82a31072af688c9d77977a474d32e0af27eb5a

          SHA512

          3bf51e9baca9aeb05bc8b418c5bdb4da457946a18093de2795b7b6a9b16a0f654169c15733f32337afc68cb650a3df1c81f1a0a043ef0234c1416f4fd570426b

        • C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe

          Filesize

          783KB

          MD5

          7441a4ce9c4e8ac5928eed31e78d925c

          SHA1

          7cacc24fbfb677bfadd4685d5f7820a946a44448

          SHA256

          3a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470

          SHA512

          bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df

        • C:\Users\Admin\AppData\Local\8ae8bc69-3b8a-47da-a3e9-81f1d5adf81a\7441a4ce9c4e8ac5928eed31e78d925c.exe

          Filesize

          64KB

          MD5

          5f54ad291e321fd454c783216afa317e

          SHA1

          99fbe4daf4b97636fd388ed0921acbc33f06b4bb

          SHA256

          29d85dede6f20a7a142514b1b2084cbfe96b8de07df3486004388871b9ef1e50

          SHA512

          d6a8adf2da60b42f70b6c82b483e153ec383617e685f68d0df09aa0546355fd205991bba679de2ac2431856eddee6cf578409eef5cf554e511084b7e93a868d5

        • memory/448-51-0x0000000002670000-0x0000000002704000-memory.dmp

          Filesize

          592KB

        • memory/1120-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1120-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1120-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1120-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2088-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3216-1-0x0000000002570000-0x0000000002602000-memory.dmp

          Filesize

          584KB

        • memory/3216-2-0x00000000027E0000-0x00000000028FB000-memory.dmp

          Filesize

          1.1MB

        • memory/3316-15-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3316-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3316-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3316-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3316-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4868-18-0x0000000002580000-0x0000000002616000-memory.dmp

          Filesize

          600KB