Analysis

  • max time kernel
    144s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu 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).

  • 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 30 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:2576
    • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
      "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1576
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\40ae4dac-52e5-4f9c-b306-f8cdf91ea7c6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2780
      • 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:2904
        • C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe
          "C:\Users\Admin\AppData\Local\Temp\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

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

    7a3eca3713ecf8b227ccb9c1ba348f5b

    SHA1

    32915adf11f6be7c07d08a9f0916d6c8fae12b18

    SHA256

    65705f3a54c1043cc4b1c9fb40543f397dc3617b8981d013445d6ed5686b0ae9

    SHA512

    c11a57f014aef9a18e0045dbb19e402b587dbca3eccfe704d335c1aa0b4ecb6a75ddfd8b347587e6b4ce27811ed16d709079429d066696e3f87b3f59f1af974c

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

    Filesize

    170B

    MD5

    eb33be5b058aa578baceec348a51d21f

    SHA1

    7c4250c3d4e259704b1e62e51d766c6a4eb6697d

    SHA256

    4da2de05fae86c99f976dcebea44d1eaf0cd57f4b536e9471637410146d2e359

    SHA512

    d3ea6ff203cbdecc278757331ce6eb586b87e387059dd7c0db27b0d38029b75b6528a8bcfd3fe8d7439e2ba73cd61a011830c086a4403148054dbb63532504f7

  • C:\Users\Admin\AppData\Local\40ae4dac-52e5-4f9c-b306-f8cdf91ea7c6\ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc.exe

    Filesize

    788KB

    MD5

    d12fac240f848ffc20ab138277643ffb

    SHA1

    0bbf2d7bae64ec348ec6c7060e185126abd59d63

    SHA256

    ad42ae25b5ae192a64ff550c53b5d2db38b3cbf0b77d34af7dbe6fd0f554aadc

    SHA512

    81f261deffc263258828a995a4445a37c521b67eed67ebc19314e5062c56b038e3f0a03806323a3f7638ac6be0858a06b75c15767ff4224a478fd9ef6d89f538

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y8UFEBH5\get[1].php

    Filesize

    437B

    MD5

    6910426a598bc0b07dd6ca7c2faf5c22

    SHA1

    4304d65a08652b167453997e1464cc6ef034be23

    SHA256

    ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

    SHA512

    5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

  • C:\Users\Admin\AppData\Local\Temp\CabBAC7.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

    Filesize

    449B

    MD5

    caa078f0348cda98328127c142e3bfed

    SHA1

    e38274d642c806a3affcca8f7e37b61f591c47e6

    SHA256

    91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

    SHA512

    2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

  • memory/1576-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1576-7-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1576-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1576-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1576-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2576-0-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB

  • memory/2576-2-0x0000000002B40000-0x0000000002C5B000-memory.dmp

    Filesize

    1.1MB

  • memory/2576-1-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB

  • memory/2816-45-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-46-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-60-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-72-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-75-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-76-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-73-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2816-77-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2904-28-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB