Managed XDR

virus.zip (WannaCry) — malware analysis report

File info

Filename
virus.zip
File type
Zip archive data, at least v1.0 to extract
File size
20.1 MB
First seen
Last seen

Environment

win7/x64 en

Hashes

SHA1
8701bb16293b31608a9955895b0ed4f2efc4d089
SHA256
f6d597714cafd532f9201845ef1db1485fe7227101572461bc1ae606f856cf95
MD5
54eb7925608ebeb7374215f7c2ab520d

Malwares

  • WannaCry

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests
T1072 network_tor: Installs TOR on the infected machine
T1059.003 executes_dropped_cmd: Executes dropped batch files
T1059.005 obfuscated_vbs: Detected obfuscated VBS
T1059.006 drops_python_dll: Drops python dll

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Defense Evasion

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1006 direct_disc_access: Direct disk access has been detected
T1497.001 antivm_generic_disk: Checks information on disk, possibly for anti-virtualization or checking privileges
T1222 icacls: May obtain or change Discretionary access control lists (DACLs)
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027 obfuscated_vbs: Detected obfuscated VBS
T1497.001 antivm_network_adapters: Checks NIC addresses
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1480 system_default_lang_id_present: Checks the system language
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1070.004 self_removal_command: Executes command to delete itself

Credential Access

T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_mail: Collects personal data from local email clients
T1552 cookie_files: Accesses cookie files
T1555.003 cookie_files: Accesses cookie files
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1082 antivm_generic_disk: Checks information on disk, possibly for anti-virtualization or checking privileges
T1497.001 antivm_generic_disk: Checks information on disk, possibly for anti-virtualization or checking privileges
T1057 pidbruteforce: Enumerates processes using PID Bruteforce
T1057 process_interest: Enumerates processes
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1518 locates_browser: Attempts to identify where browsers are installed
T1497.001 antivm_network_adapters: Checks NIC addresses
T1049 list_ts_rdp_sessions: Lists ts/rdp sessions
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name

Lateral Movement

T1072 network_tor: Installs TOR on the infected machine

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1071.001 network_http: Performs HTTP requests
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Impact

T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1486 ransomware_windows_possible: Ransomware indicators detected (possible ransom window creation)
T1486 ransomware_extensions: Ransomware(s) Wannacry indicators detected (specific extension is added to files)
T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1486 ransomware_files: Ransomware indicators detected WannaCry (creates keys and the instruction on how to unlock the files)
T1486 ransomware_files_2: Ransomware(s) Wannacry indicators detected (creates keys and the instruction on how to unlock the files)
T1486 mass_data_encryption: Encrypts data using the same key (possible ransomware behaviour)
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
T1565.001 overwrites_firefox_settings: Modifies Mozilla Firefox settings
T1486 ransomware_message: Ransomware indicators detected (possible ransom message creation)

Other

yara_rules: Static rules
ransomware_shadowcopy: Removes volume shadow copies
creates_exe: Creates executable files in the file system
ransomware_bcdedit: Runs bcdedit commands specific to ransomware
creates_in_windows: Creates files in the Windows directory
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
network_bind: Starts servers listening at 127.0.0.1:9050
dead_host: Connects to IP addresses that do not respond to requests
executes_dropped_exe: Executes dropped exe files
unexpected_exception: Unexpected exception
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
access_recyclebin: Manipulation with recyclebin detected
message_box: Displays a message
get_policy_info: Retrieves information about a Policy object
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
archive_password_infected: Archive is protected by 'infected' password
writes_data: Writes big amount of data to disk
pe_overlay: PE file contains overlay
suricata_alert: Malicious traffic detected

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