Muisvc(unpacked).exe

General
Target

Muisvc(unpacked).exe

Size

1MB

Sample

211021-xg4h2abegm

Score
10 /10
MD5

dee33a5b0f93ffbf6c5da9e376b89c9b

SHA1

e5c0415345340ccec55c6e79503296a846db7a70

SHA256

b654cc6156b8cb72642d97672847401552bf72b208d52047b2697612ef3107d1

SHA512

9ff39cbd360eca2adafd44f60064da2b6d7e1961599ef28de97d0582725d02c4a81e6429e2a9d33f389d175fb12136d190fd4d2188a44d50d02b2f1fede241c8

Malware Config

Extracted

Path C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\633754-readme.html
Ransom Note
<html> <head> <title>Inferno</title> <style> *, :after, :before { box-sizing: border-box; } html, body { margin: 0; background: #000000; font-family: sans-serif; line-height: 1.5; color: #777; } h1 { margin: 0; font-size: 2rem; } h2 { margin: 0; font-size: 1.4rem; } h3 { margin: 0; font-size: 1.2rem; } li, p { margin-top: 0; margin-bottom: .7rem; font-size: 1.1rem; letter-spacing: .02rem; } .logo { display: flex; justify-content: center; padding: 1.3rem 0; } .title { background-color: #ffffff; padding: .5rem 0; } .title h1 { text-align: center; } .title h1 span{ color: #000; } .description, .attention, .cc { width: 900px; max-width: 100%; margin: auto; padding: 1.3rem 0; } .copy-btn { opacity: .3; cursor: pointer; } .copy-btn svg { width: 18px; } .copy-btn:hover { opacity: 1; } .link { cursor: pointer; } .link:hover { text-shadow: 0 0 3px #828282; } .identity-head { display: flex; justify-content: space-between; } .identity { word-break: break-all; background-color: #e3f5eb; padding: 1rem; font-size: 1.1rem; font-family: monospace; margin-bottom: 1.3rem; } .attention p { text-transform: uppercase; color: #dc3545; text-align: center; } </style> </head> <body> <div class="logo"> <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="250" viewBox="0 0 200 250"> <image width="200" height="250" xlink:href="data:img/png;base64,/9j/4AAQSkZJRgABAQEBLAEsAAD/4S/wRXhpZgAASUkqAAgAAAAHABIBAwABAAAAAQAAABoBBQAB AAAAYgAAABsBBQABAAAAagAAACgBAwABAAAAAgAAADEBAgANAAAAcgAAADIBAgAUAAAAgAAAAGmH BAABAAAAlAAAAKYAAAAsAQAAAQAAACwBAAABAAAAR0lNUCAyLjEwLjI0AAAyMDIxOjA5OjA5IDE0 OjM3OjU3AAEAAaADAAEAAAABAAAAAAAAAAgAAAEEAAEAAADMAAAAAQEEAAEAAAAAAQAAAgEDAAMA AAAMAQAAAwEDAAEAAAAGAAAABgEDAAEAAAAGAAAAFQEDAAEAAAADAAAAAQIEAAEAAAASAQAAAgIE AAEAAADWLgAAAAAAAAgACAAIAP/Y/+AAEEpGSUYAAQEAAAEAAQAA/9sAQwAIBgYHBgUIBwcHCQkI CgwUDQwLCwwZEhMPFB0aHx4dGhwcICQuJyAiLCMcHCg3KSwwMTQ0NB8nOT04MjwuMzQy/9sAQwEJ 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Extracted

Path C:\633754-readme.html
Ransom Note
"Gustave Doré, engraving illustrating Canto XVII of Divine Comedy, Inferno, by Dante Alighieri; caption: The Descent of the Abyss on Geryon's Back; in Dante Alighieri, The Divine Comedy: the Inferno, Purgatorio, and Paradiso, trans.: Lawrence Grant White," by ancientartpodcast.org is licensed with CC BY 2.0. Your network has been infected by Inferno All your documents, photos, databases and other important files have been encrypted and you are not able to decrypt it by yourself. But don't worry, we can help you to restore all your files! The only way to restore your files is to buy our special software - Inferno General Decryptor . Only we can give you this software and only we can restore your files! You can get more information on our page, which is located in a Tor hidden network. How to get to our page Download Tor browser - https://www.torproject.org/ Install Tor browser Open link in Tor browser - infernoyrxlapxaiq.onion Follow the instructions on this page Your ID: 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 Do not try to recover files yourself! Do not modify encrypted files! Otherwise, you may lose all your files forever! “Now, now my good man, this is no time to be making enemies. (Voltaire on his deathbed in response to a priest asking him that he renounce Satan.)” Voltaire
URLs

http://infernoyrxlapxaiq.onion

Targets
Target

Muisvc(unpacked).exe

MD5

dee33a5b0f93ffbf6c5da9e376b89c9b

Filesize

1MB

Score
10/10
SHA1

e5c0415345340ccec55c6e79503296a846db7a70

SHA256

b654cc6156b8cb72642d97672847401552bf72b208d52047b2697612ef3107d1

SHA512

9ff39cbd360eca2adafd44f60064da2b6d7e1961599ef28de97d0582725d02c4a81e6429e2a9d33f389d175fb12136d190fd4d2188a44d50d02b2f1fede241c8

Tags

Signatures

  • Avaddon

    Description

    Ransomware-as-a-service first released in June 2020 and currently expanding its userbase among criminal actors.

    Tags

  • UAC bypass

    Tags

    TTPs

    Bypass User Account ControlDisabling Security ToolsModify Registry
  • suricata: ET MALWARE Win32/Avaddon Ransomware Style External IP Address Check

    Description

    suricata: ET MALWARE Win32/Avaddon Ransomware Style External IP Address Check

    Tags

  • Deletes shadow copies

    Description

    Ransomware often targets backup files to inhibit system recovery.

    Tags

    TTPs

    File DeletionInhibit System Recovery
  • Modifies extensions of user files

    Description

    Ransomware generally changes the extension on encrypted files.

    Tags

  • Adds Run key to start application

    Tags

    TTPs

    Registry Run Keys / Startup FolderModify Registry
  • Checks whether UAC is enabled

    Tags

    TTPs

    System Information Discovery
  • Drops desktop.ini file(s)

  • Enumerates connected drives

    Description

    Attempts to read the root path of hard drives other than the default C: drive.

    TTPs

    Query RegistryPeripheral Device DiscoverySystem Information Discovery
  • Looks up external IP address via web service

    Description

    Uses a legitimate IP lookup service to find the infected system's external IP.

Related Tasks

MITRE ATT&CK Matrix
Collection
    Command and Control
      Credential Access
        Execution
          Exfiltration
            Initial Access
              Lateral Movement
                Privilege Escalation