Resubmissions

02-04-2023 15:22

230402-srycjsha39 10

02-04-2023 14:33

230402-rw1sssab3t 10

Analysis

  • max time kernel
    38s
  • max time network
    41s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-04-2023 15:22

General

  • Target

    37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe

  • Size

    751KB

  • MD5

    a7232495cefcbd35aece550e9cb57be2

  • SHA1

    8348c90f7d9faef12b2acea0741932d9dabdf83b

  • SHA256

    37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7

  • SHA512

    cada31ba1a8414d2c861aad47d9cd4e51bb1d73cfb91589c1c1378b7eec130a1bfdefb11a2c2059f6c9e6afe6bca759e297c853989e082cb70f385e822c92a7a

  • SSDEEP

    12288:PZv3GWL91nJXTgmNubakPfzN8jgWASRmVAeTGmAmQtHFWvqF2ti//cVfbAGKtGt:5GWR19TgmHoN8jghSoTTGmALtlkqAkC1

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes
  • extension

    .nifr

  • offline_id

    FCP2fiITr4rryFhFBnA59GMgwES5CunmcbPc76t1

  • payload_url

    http://uaery.top/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-v8HcfXTy5x 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: 0679SUjhw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 12 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 2 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.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe
    "C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3592
    • C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe
      "C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2120
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0196e1f8-5d81-4439-a115-3dfe386c00f0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3744
      • C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe
        "C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1568
        • C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe
          "C:\Users\Admin\AppData\Local\Temp\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1760

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\0196e1f8-5d81-4439-a115-3dfe386c00f0\37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7.exe

    Filesize

    751KB

    MD5

    a7232495cefcbd35aece550e9cb57be2

    SHA1

    8348c90f7d9faef12b2acea0741932d9dabdf83b

    SHA256

    37ce5ea24b58c00c1b647e306daf527eb48366a058ab4549186c5d04ce9c38a7

    SHA512

    cada31ba1a8414d2c861aad47d9cd4e51bb1d73cfb91589c1c1378b7eec130a1bfdefb11a2c2059f6c9e6afe6bca759e297c853989e082cb70f385e822c92a7a

  • memory/1760-146-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1760-152-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1760-151-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1760-150-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1760-148-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1760-147-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2120-137-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2120-142-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2120-138-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2120-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2120-135-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3592-136-0x0000000002720000-0x000000000283B000-memory.dmp

    Filesize

    1.1MB