General

  • Target

    LegionLocker4.1.exe

  • Size

    3.2MB

  • Sample

    210726-6ddeaaha2s

  • MD5

    563059c1ba238fb233200b053327313d

  • SHA1

    c50908fe140fe127a6c2168ad7a07df6b9836186

  • SHA256

    a4e002898d11ea511868a11a43dd29011dbe97bcbd9ee4b9fbcb0520d860f975

  • SHA512

    9bbfe87044543ecf7fc6c865fad533ce864309c63cbff070c7f69ec1373392d149628c58bc7312bf72aae2aaecd6874c5ec95542042df6f34d65570da5d810bb

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\LegionReadMe.txt

Ransom Note
Ooops! All your important files are encrypted! What happend to my computer? All your important files are encrypted. No one can help you to restore files without our special decryptor. Backups were either encrypted or deleted. Shadow copies also removed. If you want to restore some of your files for free write to email (contact is below) and attach 2-3 encrypted files. You will receive decrypted samples. To decrypt other files you have to pay $50. How do i pay? Payment is accepted in Bitcoin only. Please check the current price of Bitcoin and buy some Bitcoins. And send the correct amount to the address specified at the bottom of the sheet. Contact: 1.Download Tor browser (https://www.torproject.org/) 2.Create account on mail2tor (http://mail2tor2zyjdctd.onion/) 3.Write email to us (LegionLocker@mail2tor.com) In case of no anwser in 72 hours write us to this email: CobraLocker@mail2tor.com What if i already paid? Send your Bitcoin wallet ID to e-mail provided above. Attention! 1.Do not modify encrypted files. 2.Do not try decrypt your data using third party software, it may cause pernament data loss. Our Bitcoin address: 131fjhrB4wH8j6adZXudp1Wn23pR33tpAh
Emails

LegionLocker@mail2tor.com

CobraLocker@mail2tor.com

Wallets

131fjhrB4wH8j6adZXudp1Wn23pR33tpAh

URLs

http://mail2tor2zyjdctd.onion/

Targets

    • Target

      LegionLocker4.1.exe

    • Size

      3.2MB

    • MD5

      563059c1ba238fb233200b053327313d

    • SHA1

      c50908fe140fe127a6c2168ad7a07df6b9836186

    • SHA256

      a4e002898d11ea511868a11a43dd29011dbe97bcbd9ee4b9fbcb0520d860f975

    • SHA512

      9bbfe87044543ecf7fc6c865fad533ce864309c63cbff070c7f69ec1373392d149628c58bc7312bf72aae2aaecd6874c5ec95542042df6f34d65570da5d810bb

    • Modifies WinLogon for persistence

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Disables Task Manager via registry modification

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Possible privilege escalation attempt

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Modifies file permissions

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Checks whether UAC is enabled

    • Sets desktop wallpaper using registry

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Defense Evasion

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

1
T1497

File Permissions Modification

1
T1222

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Impact

Defacement

1
T1491

Tasks