Resubmissions

07-05-2024 16:28

240507-tyx6ssha59 10

07-05-2024 16:24

240507-twmx2sed5t 10

General

  • Target

    https://github.com/Da2dalus/The-MALWARE-Repo/blob/master/Ransomware/7ev3n.exe

  • Sample

    240507-tyx6ssha59

Malware Config

Targets

    • Target

      https://github.com/Da2dalus/The-MALWARE-Repo/blob/master/Ransomware/7ev3n.exe

    • Dharma

      Dharma is a ransomware that uses security software installation to hide malicious activities.

    • InfinityLock Ransomware

      Also known as InfinityCrypt. Based on the open-source HiddenTear ransomware.

    • Mimikatz

      mimikatz is an open source tool to dump credentials on Windows.

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Renames multiple (445) files with added filename extension

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

    • mimikatz is an open source tool to dump credentials on Windows

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Sets service image path in registry

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Adds Run key to start application

    • Blocklisted process makes network request

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks