Analysis

  • max time kernel
    121s
  • max time network
    128s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    06-12-2021 09:52

General

  • Target

    443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe

  • Size

    826KB

  • MD5

    0dc94c35fd5d82bf6a3488e2336fa67c

  • SHA1

    ab4373f78b4428009f40c4e262f5d5c98434b41f

  • SHA256

    443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff

  • SHA512

    77a64d64bdb30ddcdc7288a40c1a0321402b62f8f6b8a57f8fad86b8cfbbb240c851e1132e5a5796b8a9e83994a6e0b250c482a0b8d1af7fc1118c9c01eb6188

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .hgsh

  • 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: 0358Sigrj

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\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe
    "C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe
      "C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4072
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8937a691-0c73-4d05-910b-df6969577282" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1300
      • C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe
        "C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3700
        • C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe
          "C:\Users\Admin\AppData\Local\Temp\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:500

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

    5f7e270ccc174c5f20e0e7667a242dff

    SHA1

    ea2480244787a3ac7a6f08dcba9b7c2bd6754f0c

    SHA256

    6efd3591eaca8912fcd034ccb7a096d0fa21fff9ac6dc39093503ac4bf90706e

    SHA512

    a9432ba30ac1bf754db05a409150bc766f0d7bd59be3a62c9554758e84249baf88abdc7eaf6c63d5c781f879ae4d6d1400effc18c6470930b645fd62bc7b96c2

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

    MD5

    3f75a172fb55a92e7d21b9d622223506

    SHA1

    b4c0428901e44ee61bc5c5b885f5248232feffa6

    SHA256

    d525eb888ffefcf487628849257b2b5b5f6154fb3c159d59b0d35dffa76fb37a

    SHA512

    4b42d07108f7c818b16713a2d5d0b78f71c56364043a5a039c1a039cffe2647ae066f2117e83f2e3d621abdaf20541fc8f8d709527ddfee7b61d4ee7171cf356

  • C:\Users\Admin\AppData\Local\8937a691-0c73-4d05-910b-df6969577282\443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff.exe

    MD5

    0dc94c35fd5d82bf6a3488e2336fa67c

    SHA1

    ab4373f78b4428009f40c4e262f5d5c98434b41f

    SHA256

    443db00f0bb445cd237019c97f3000d17b53b5ceac6b63ec1996e4df10d0c3ff

    SHA512

    77a64d64bdb30ddcdc7288a40c1a0321402b62f8f6b8a57f8fad86b8cfbbb240c851e1132e5a5796b8a9e83994a6e0b250c482a0b8d1af7fc1118c9c01eb6188

  • memory/500-125-0x0000000000424141-mapping.dmp

  • memory/500-130-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1300-120-0x0000000000000000-mapping.dmp

  • memory/3700-122-0x0000000000000000-mapping.dmp

  • memory/3700-123-0x0000000002159000-0x00000000021EB000-memory.dmp

    Filesize

    584KB

  • memory/3772-115-0x0000000002270000-0x0000000002302000-memory.dmp

    Filesize

    584KB

  • memory/3772-116-0x0000000002310000-0x000000000242B000-memory.dmp

    Filesize

    1.1MB

  • memory/4072-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4072-118-0x0000000000424141-mapping.dmp

  • memory/4072-117-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB