Managed XDR

c-users-user-appdata-l...mp-mousocoreworker.exe (Lorenz) — malware analysis report

File info

Filename
c-users-user-appdata-local-temp-mousocoreworker.exe
File type
PE32 executable (console) Intel 80386, for MS Windows
File size
987 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
67d441e556b9b21a5613b558e02281a0a2d4454d
SHA256
5f21e0ca0003ca7ef7793e401db7c4346dbd88e7afe7a1acc8d725bbd6c22995
MD5
a88317b13597fd1a53d4fe000becb80a

Malwares

  • Lorenz

Signatures

Execution

T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1047 has_wmi: Executes one or several WMI requests

Persistence

T1053.005 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Defense Evasion

T1218 wmic_create_process: Creates a process using wmic.exe utility
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey
T1070 stealth_window: A process created a hidden window
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Discovery

T1057 has_wmi: Executes one or several WMI requests
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey

Exfiltration

T1022 encrypts_pc_info: Collects and encrypts information about the computer (possibly for exfiltration)

Impact

T1486 modifies_files: Cryptolocker indicators detected (renamed 100 or more files)
T1485 deletes_files: Removes 100 or more files from C: drive
T1486 mass_data_encryption: Encrypts data using the same key (possible ransomware behaviour)

Other

yara_rules: Static rules
ce_info: Lorenz Configuration Data found
lorenz: Detected Lorenz ransomware
creates_exe: Creates executable files in the file system
creates_in_windows: Creates files in the Windows directory
copies_self: Creates a copy of itself
dead_host: Connects to IP addresses that do not respond to requests
executes_dropped_exe: Executes dropped exe files
no_graphical_activity: No graphic activity
has_pdb: This executable file has a PDB path
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk

Related reports

Managed XDR