Analysis

  • max time kernel
    112s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    06-12-2021 10:32

General

  • Target

    bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe

  • Size

    827KB

  • MD5

    ec8314507bfd19af33ed45dd9497cfd5

  • SHA1

    76171869e33ed47fe527d976dd8254488723db08

  • SHA256

    bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6

  • SHA512

    ba90648c6d8b98bff30c0d219f4cd075ecb71e3e46d8484c5cf6f508a0cedba117e76726aa3cc607fd24249c0080c0661ff9cd5f8b444136be6c11248fd68e3d

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .wnlu

  • offline_id

    gYuqQ5GsAaJom08TivUVhlPzZDKd916x4NcXrWt1

  • payload_url

    http://kotob.top/dl/build2.exe

    http://tzgl.org/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-m8LBBi8x8F 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: 0357Sigrj

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 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). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe
    "C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2732
    • C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe
      "C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3808
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8a4bdde2-0caa-4ba6-961c-6370d8bac0f4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:428
      • C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe
        "C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1012
        • C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe
          "C:\Users\Admin\AppData\Local\Temp\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:816

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    1c63500df0b57e29edd1a5867d9f0e9b

    SHA1

    0475a0611ac4d171e90b46303b96317fc186b15d

    SHA256

    c8f7c1bd12b80996707a806866379d91dc3008d5d2b0eeeb6d97d418aeeb7914

    SHA512

    29b914ffe63496d98e8ffb76afde49702888743c88bd0fc6aabdf3e8855e3a5389d933a29ccb4564e8d3198c159a1debfb56d6f39f428689f8eb4d497b341bde

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    65052acb8dc97b38007797064162c9a1

    SHA1

    862cf5f74d74b85103b088650a230ed0c6d32df3

    SHA256

    ef406913c83356f132bbc250646c24befee2acfdabbc9debcbca68c1da01a30f

    SHA512

    976f4bd21af190164d04534f4e534d44e14fd5d3c6798421f84ead4e0a53f25d386d4b59bfe0c7c5865af4f22593d975d6b48292b024a4b6ca0d65ff6ee735bd

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    b930bdb63ec92ea2c4e2fab0c2198c9f

    SHA1

    3d1645a8f1ba998b237f8a401ad46060cb8e1918

    SHA256

    c1c5515a364428454119603cae6571d33ea4da83bd00e40f8805320345edacbb

    SHA512

    4f08e89d0979de7b973268c66a31452a2097e769a21159650842eb14182a7f92ac1c6f358497eb35dbc3c198e311fc9618f256700a39c767a0bae8b2a157a569

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    9d147615168f3666b07a9571d5cd76ba

    SHA1

    d85807abf04ef99b69109bf62229335e46abef72

    SHA256

    83b47957f46dd33d222b569f50bca7f8ee6587b3ac81fd9531dbadabaffd8648

    SHA512

    bef4ff9d9d9f8e12231e38b6b5c6b52308fde1a9df0db38c1a71cae32d2c00085645f7e000652d5495ee7c1a3766982dfe69136df2f486c6cb49e5d3f935b28a

  • C:\Users\Admin\AppData\Local\8a4bdde2-0caa-4ba6-961c-6370d8bac0f4\bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6.exe

    MD5

    ec8314507bfd19af33ed45dd9497cfd5

    SHA1

    76171869e33ed47fe527d976dd8254488723db08

    SHA256

    bba85819033ea0a14da507f3ed98da5dcefe01d3a65e9e0880a2f405bcfb89f6

    SHA512

    ba90648c6d8b98bff30c0d219f4cd075ecb71e3e46d8484c5cf6f508a0cedba117e76726aa3cc607fd24249c0080c0661ff9cd5f8b444136be6c11248fd68e3d

  • memory/428-123-0x0000000000000000-mapping.dmp

  • memory/816-128-0x0000000000424141-mapping.dmp

  • memory/816-129-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1012-125-0x0000000000000000-mapping.dmp

  • memory/1012-126-0x0000000000655000-0x00000000006E6000-memory.dmp

    Filesize

    580KB

  • memory/2732-118-0x0000000002155000-0x00000000021E6000-memory.dmp

    Filesize

    580KB

  • memory/2732-121-0x0000000002220000-0x000000000233B000-memory.dmp

    Filesize

    1.1MB

  • memory/3808-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3808-120-0x0000000000424141-mapping.dmp

  • memory/3808-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB