Analysis

  • max time kernel
    45s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    19-04-2021 11:53

General

  • Target

    e3518a8b3fd422f192fd90049186ea01ff120bdb72d3652c0933b31399b9b90f.exe

  • Size

    7KB

  • MD5

    be6be1c81865e4eb75d01a918812ddea

  • SHA1

    1482d68b097f8ff8c6257a754d7d452b0e34829f

  • SHA256

    e3518a8b3fd422f192fd90049186ea01ff120bdb72d3652c0933b31399b9b90f

  • SHA512

    ea13391c0fd196486ed40cf359e18995f787a8e46a568f9795ab113757def02ba8f5536a48739c77c9fd2c4eaf763713b31a2e5ebeb0cbab644119d62406ec21

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-2513283230-931923277-594887482-1000\HOW TO DECRYPT FILES.txt

Ransom Note
Your files have been encrypted with our software. Photos, documents etc ... WHAT I CAN DO?? You can pay $ 20 in bitcoins to this address: 3QgJDoVEaksAs9kFz1vcueG8DKF4hPrARW As soon as you have made the payment, contact us in this email and we will give you the password bufalo@boximail.com *IMPORTANT* You must have proof of payment
Emails

bufalo@boximail.com

Wallets

3QgJDoVEaksAs9kFz1vcueG8DKF4hPrARW

Signatures

  • Drops file in Drivers directory 3 IoCs
  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Modifies registry class 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e3518a8b3fd422f192fd90049186ea01ff120bdb72d3652c0933b31399b9b90f.exe
    "C:\Users\Admin\AppData\Local\Temp\e3518a8b3fd422f192fd90049186ea01ff120bdb72d3652c0933b31399b9b90f.exe"
    1⤵
    • Drops file in Drivers directory
    • Drops startup file
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    PID:2040
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Public\Desktop\HOW TO DECRYPT FILES.txt
    1⤵
      PID:1708

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Public\Desktop\HOW TO DECRYPT FILES.txt
      MD5

      8dcd6ea3b6f1b784daafdb93a8e3b997

      SHA1

      2a54aa2116f6bd50acaf8e3d019a8b7f7390bf63

      SHA256

      ae962c8d9e65bc1a3002ed16ccf1e6019d6412ba7c71ad40c54584750e5dfc57

      SHA512

      7c705205112c719eceaa02c22d823e20442479091bcef8698d9847eff51780e1bd7fc0464e6341de2e78d8156fd479332da983fa86b0ee7607fc19c8c691a1eb

    • memory/1708-61-0x000007FEFC141000-0x000007FEFC143000-memory.dmp
      Filesize

      8KB

    • memory/2040-60-0x0000000076281000-0x0000000076283000-memory.dmp
      Filesize

      8KB