Overview

overview

10

Static

static

10

37ca1cfa1f...60.exe

windows7-x64

10

37ca1cfa1f...60.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 03:38

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General

  • Target
    37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60.exe
  • Size 953KB
  • Sample240329-d7ah4agg5x
  • SHA256 37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
chaosransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\Users\Admin\Documents\PLEASEREAD.txt

Ransom Note
  • WELCOME, DODO has returned AGAIN. Your files have been encrypted and you won't be able to decrypt them. You can buy decryption software from us, this software will allow you to recover all of your data and remove the ransomware from your computer. The price of the software is $15. Payment can be made in Bitcoin How do I pay, where do I get Bitcoin? Purchasing cryptocurrency varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Payment information: send $15, to one of our addresses, then send us email with payment confirmation and you'll get the decryption software in email. Email Address : [email protected] BTC address: bc1qwel3y5ef4sgumcnm9njln3eupvxutymlv732gu We Promise ALl your files will be back as soon as u pay

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

    ransomwarechaos
  • Chaos Ransomware 1 IoCs
  • Detects command variations typically used by ransomware 1 IoCs
  • Renames multiple (195) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops desktop.ini file(s) 34 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60.exe
    "C:\Users\Admin\AppData\Local\Temp\37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Drops desktop.ini file(s)
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:3520

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        PLEASEREAD.txt
        • Path C:\Users\Admin\Documents\PLEASEREAD.txt
        • Size 823B
        • SHA256 b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8
        • MD5 SHA1 SHA512
        Submit Download

        memory/4664-0-0x00000000007F0000-0x00000000008E4000-memory.dmp
        Download

        memory/4664-1-0x00007FF8051E0000-0x00007FF805CA1000-memory.dmp
        Download

        memory/4664-2-0x000000001B670000-0x000000001B680000-memory.dmp
        Download

        memory/4664-442-0x00007FF8051E0000-0x00007FF805CA1000-memory.dmp
        Download

        memory/4664-443-0x000000001B670000-0x000000001B680000-memory.dmp
        Download