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 (stripped to external PDB), for MS Windows, UPX compressed
File size
1.1 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
ec28eb4420159c64d9f2f1a81e89afbee6a693ca
SHA256
44cbcce59b8da9569e84a026ff56935fe3e948f53a8e93543b105e3040fda3b0
MD5
841ac4436a15724b3a3d5ba6885e8c57

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
T1027.002 packer_upx: The executable file is compressed using UPX
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1070 stealth_window: A process created a hidden window

Credential Access

T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1057 has_wmi: Executes one or several WMI requests
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name

Impact

T1486 ransomware_extensions: Ransomware(s) Lorenz indicators detected (specific extension is added to files)
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
executes_dropped_exe: Executes dropped exe files
no_graphical_activity: No graphic activity
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
writes_data: Writes big amount of data to disk
suricata_alert: Malicious traffic detected

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