Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-11-2024 19:10

General

  • Target

    ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe

  • Size

    788KB

  • MD5

    d12fac240f848ffc20ab138277643ffb

  • SHA1

    0bbf2d7bae64ec348ec6c7060e185126abd59d63

  • SHA256

    ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc

  • SHA512

    81f261deffc263258828a995a4445a37c521b67eed67ebc19314e5062c56b038e3f0a03806323a3f7638ac6be0858a06b75c15767ff4224a478fd9ef6d89f538

  • SSDEEP

    24576:Sh2Q81BHBADHUVYNV8Wvq0XuH8TNe1fUb:ShUhiHUVU8WS0XDNe9

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .nbzi

  • offline_id

    csCsb6cUvy0iMa6NgGCGH0hSfXQlGjZVEmFVkgt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/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-8dGJ2tqlOd 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: 0832ASdw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 18 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu family
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
    "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1192
    • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
      "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3008
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\6b493867-506b-44db-b309-2697d039a90f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2040
      • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
        "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4620
        • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
          "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:3196

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    1KB

    MD5

    67e486b2f148a3fca863728242b6273e

    SHA1

    452a84c183d7ea5b7c015b597e94af8eef66d44a

    SHA256

    facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

    SHA512

    d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    436B

    MD5

    971c514f84bba0785f80aa1c23edfd79

    SHA1

    732acea710a87530c6b08ecdf32a110d254a54c8

    SHA256

    f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

    SHA512

    43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    174B

    MD5

    aad2d8ec18bd4c6fa95d025b7cb72f62

    SHA1

    834d76cf0d990028e72fb0b8bee7724ea9f80b90

    SHA256

    5fe77ad98d9da7950dd5ccfdf97e4a0667f1fe5ad118447c3ffbd7a00fa1a67e

    SHA512

    420f567545e15410d6d4595f2a1670d0497bd997f5d0e5e5242ad450c10cccd312b11ca1cb325a68bbf165e5dffa222cdd0e142da784b29dce9f019c74dda843

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    170B

    MD5

    b6910f1d8331c13b3a504594b61e1241

    SHA1

    eaf681883c8d1fa7f2bf59ea4fcdee42b848e2d2

    SHA256

    304457dcd3bd030d7f7c834ebd0ef5e1d1f95c7713d2f8aabb97eeddf4a289cb

    SHA512

    62c3c3bd4d2ad1c98e9a11c24c5d37bb670e9abc4e3bb41ac0edde2ce62fb0f5c40b31b2fe5b494638a9488ac94b16d738d6fc90977e65224faebb5dcb933497

  • C:\Users\Admin\AppData\Local\6600c29d-4022-46ef-bfcc-017b1748e6b4\build3.exe

    Filesize

    437B

    MD5

    6910426a598bc0b07dd6ca7c2faf5c22

    SHA1

    4304d65a08652b167453997e1464cc6ef034be23

    SHA256

    ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

    SHA512

    5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

  • C:\Users\Admin\AppData\Local\6b493867-506b-44db-b309-2697d039a90f\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe

    Filesize

    788KB

    MD5

    d12fac240f848ffc20ab138277643ffb

    SHA1

    0bbf2d7bae64ec348ec6c7060e185126abd59d63

    SHA256

    ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc

    SHA512

    81f261deffc263258828a995a4445a37c521b67eed67ebc19314e5062c56b038e3f0a03806323a3f7638ac6be0858a06b75c15767ff4224a478fd9ef6d89f538

  • C:\Users\Admin\AppData\Local\bowsakkdestx.txt

    Filesize

    449B

    MD5

    caa078f0348cda98328127c142e3bfed

    SHA1

    e38274d642c806a3affcca8f7e37b61f591c47e6

    SHA256

    91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

    SHA512

    2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

  • memory/1192-1-0x0000000004890000-0x000000000492B000-memory.dmp

    Filesize

    620KB

  • memory/1192-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp

    Filesize

    1.1MB

  • memory/3008-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3008-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3008-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3008-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3008-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-66-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-67-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-69-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-70-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-71-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3196-72-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB