Managed XDR

windowssecurityhealth.exe (Lockbit) — malware analysis report

File info

Filename
windowssecurityhealth.exe
File type
PE32+ executable (GUI) x86-64 (stripped to external PDB), for MS Windows
File size
89 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
88a2a4c93273f23cc7083fdf659a55dc47edafd8
SHA256
008589ae991652321ec03331370e8be401fd0132e97232e7b69ab7a9ba72e3c0
MD5
9b5f0e10cb34c49b9d49afe68cfbbe86

Malwares

  • Lockbit

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Privilege Escalation

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

T1070.001 wevtutil_clear_log: Clears event log using wevtutil
T1564.001 stealth_file: Creates hidden or system files
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
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

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1102.003 cloud_discord: Connects to cloud services of Discord (potentially for malicious payload delivery)
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Impact

T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1561 wiper_zeroed_bytes: Overwrites multiple files with zero bytes (hex 00)
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
T1565.001 overwrites_firefox_settings: Modifies Mozilla Firefox settings
T1490 disables_system_restore: Disables System Restore

Other

suricata_alert: Malicious traffic detected
lockbit: Detected ransomware Lockbit
ransomware_shadowcopy: Removes volume shadow copies
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
ip_domains: Identifies an IP address using external resources
creates_suspended_process: Creates suspended process
access_recyclebin: Manipulation with recyclebin detected
creates_in_programdata: Creates files in the ProgramData directory
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
writes_data: Writes big amount of data to disk
pe_overlay: PE file contains overlay
yara_rules: Static rules
static_big_overlay: Executable file contains an enormously big overlay

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