Analysis

  • max time kernel
    110s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    05-12-2021 06:37

General

  • Target

    a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe

  • Size

    820KB

  • MD5

    4f6912a60696b0ba325fd3cacc899858

  • SHA1

    eb56d18675e2ca57bcba27689708835e5243e551

  • SHA256

    a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746

  • SHA512

    7f45890c3629e77ffe28f53aab7e93ee7a7d1ac971d9cfd655492d10f2bbeb345f0caa27bae7ac4511c27f7b9c73a0d87d7d9d3b34f398d1a105abc7ecef5f33

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\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe
    "C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe
      "C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3444
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a8e254e4-00ca-4707-9162-d962840eedf8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3472
      • C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe
        "C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1452
        • C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe
          "C:\Users\Admin\AppData\Local\Temp\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:804

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

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

    4aa00ef84eb9d4823d3c249942fe7376

    SHA1

    b4d31c9eb56ea86744497f4b8d2c15c94654c8b6

    SHA256

    47842c579be6c916201238729ccfb7924e99c0ac207c3e6ea91ee769a92c9a95

    SHA512

    183ba9c951e3e19e527544cd3d7fd5bd2bfe6912470baae7de470965d8d4fbad8168ecd35879feb5e4769776aeedaf17bdf52ffc4187e549d97b5ea9e3a8b8da

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

    77d342a8eb35e9d70b074c623fc565f9

    SHA1

    232477840d79d216f5195052c4a133a031c5c025

    SHA256

    74c709cd15e29ec3f9e7a0a40b9998a635408d12165c179260612468ce9c014d

    SHA512

    4505e7363095fb65794f31bf2d28f5285b286200c9305a0c1409294caf5d6ca666f98e306ddc412978f79eb17dc7b94286d485d34d63750a528d30d8e7cab6ae

  • C:\Users\Admin\AppData\Local\a8e254e4-00ca-4707-9162-d962840eedf8\a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746.exe
    MD5

    4f6912a60696b0ba325fd3cacc899858

    SHA1

    eb56d18675e2ca57bcba27689708835e5243e551

    SHA256

    a24ed5964765bc4ee5a8dd8f90db3ee3fe861930aeeb6a9daf3b2d6785717746

    SHA512

    7f45890c3629e77ffe28f53aab7e93ee7a7d1ac971d9cfd655492d10f2bbeb345f0caa27bae7ac4511c27f7b9c73a0d87d7d9d3b34f398d1a105abc7ecef5f33

  • memory/804-128-0x0000000000424141-mapping.dmp
  • memory/804-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1452-125-0x0000000000000000-mapping.dmp
  • memory/1452-126-0x000000000214E000-0x00000000021DF000-memory.dmp
    Filesize

    580KB

  • memory/2468-118-0x0000000002225000-0x00000000022B6000-memory.dmp
    Filesize

    580KB

  • memory/2468-121-0x00000000022C0000-0x00000000023DB000-memory.dmp
    Filesize

    1.1MB

  • memory/3444-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3444-120-0x0000000000424141-mapping.dmp
  • memory/3444-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3472-123-0x0000000000000000-mapping.dmp