Analysis

  • max time kernel
    111s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    05-12-2021 00:16

General

  • Target

    55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe

  • Size

    820KB

  • MD5

    4fb4323c4ae2d9b629a26e4a7e8247d7

  • SHA1

    f79e72a96c5a32dd6763da1df5840c387b5c97c9

  • SHA256

    55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca

  • SHA512

    60149c7f02dac754a64d582efa9cc85ee1bf7552b432801bb33b05a6f3d3bac22487bca5dd6cd66a72586b7c226ad6dcd10c4a3714f9489590680631299de3fc

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.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • 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\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe
    "C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1876
    • C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe
      "C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:8
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\efba6a00-32f8-4084-9b2b-135c91b8477f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3360
      • C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe
        "C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3168
        • C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe
          "C:\Users\Admin\AppData\Local\Temp\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:552

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

    b5935ea85a497cc30827bacc50e9a62e

    SHA1

    a9423d06d676764909597ecdd5fdfaffad906b56

    SHA256

    95abef24be43ee544d4f73180016c558705692bcecde46948666400ebb176aa4

    SHA512

    9f7b64f6cb967a1de8595078bd3d9ce8e352538d50040000ac21053995348513b1b5352de05d0f9b7827e901cb6cf45eb5de6abbe362f81c92cb9ddc996eec10

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    c25854c8840ee9bfa944b0eee1a15e72

    SHA1

    6772fa043abc9cfa09e9e6042722cf87810e0d34

    SHA256

    08c676ee20d6ea4235ed84d20bed2865773d9a03201c7ddd4b608bef3bded6ae

    SHA512

    3b13de92c6176c4fc136e7b0f05160a4d7577e94c93e1a79b26bb806d4f8c0a0e9e61d846c994ab97dcc5246997a78952e59c4ca65f85829b8d9381a6ea4eef8

  • C:\Users\Admin\AppData\Local\efba6a00-32f8-4084-9b2b-135c91b8477f\55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca.exe
    MD5

    4fb4323c4ae2d9b629a26e4a7e8247d7

    SHA1

    f79e72a96c5a32dd6763da1df5840c387b5c97c9

    SHA256

    55fe1a26835aa97bd224cc76a11872f60142edd7bf8d5708bc6bcdd6fec55fca

    SHA512

    60149c7f02dac754a64d582efa9cc85ee1bf7552b432801bb33b05a6f3d3bac22487bca5dd6cd66a72586b7c226ad6dcd10c4a3714f9489590680631299de3fc

  • memory/8-121-0x0000000000424141-mapping.dmp
  • memory/8-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/8-120-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/552-128-0x0000000000424141-mapping.dmp
  • memory/552-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1876-118-0x00000000022B0000-0x0000000002341000-memory.dmp
    Filesize

    580KB

  • memory/1876-119-0x0000000002400000-0x000000000251B000-memory.dmp
    Filesize

    1.1MB

  • memory/3168-125-0x0000000000000000-mapping.dmp
  • memory/3168-126-0x0000000002166000-0x00000000021F7000-memory.dmp
    Filesize

    580KB

  • memory/3360-123-0x0000000000000000-mapping.dmp