Managed XDR

7bc8ffa7-8bd4-4025-80f2-aba63589d9ef.eml (H-Worm) — malware analysis report

File info

Filename
7bc8ffa7-8bd4-4025-80f2-aba63589d9ef.eml
File type
HTML document, ASCII text, with very long lines, with CRLF line terminators
File size
1.6 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
d2ea1a23f8326d2b9e7e73349899c928cec5eac8
SHA256
2b2f97dac568f83939b1e31da042aa2af7980790d26aa8d73755c67bedc10a08
MD5
1b9d8209b306cb8e2e1f2ea6674ada1c

Malwares

  • H-Worm

Signatures

Execution

T1059 network_wscript_downloader: Wscript.exe initiated network communication
T1059.005 bad_vbs: Suspicious VBScript file
T1059.007 bad_js: Suspicious Javascript file
T1204.002 mimics_extension: Attempts to mimic the file extension
T1059.005 obfuscated_vbs: Detected obfuscated VBS
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests
T1059 suspicious_process: Spawns a suspicious process
T1204.002 office_com_load: Microsoft Office loads COM DLL files (indicator of COM usage in macros)
T1059 wscript_info_discovery: Collects info about system with Wscript.Shell
T1059.005 obfuscated_vbs_wmi: Suspicious WMI queries from VBScript file

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 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
T1055 injection_failed: The attempt to inject into a process has failed

Defense Evasion

T1027 obfuscated_vbs: Detected obfuscated VBS
T1036 mimics_extension: Attempts to mimic the file extension
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1036 system_filename: Created a file named as a common system file
T1036 system_procname: Created a process named as a common system process
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027 obfuscated_vbs_wmi: Suspicious WMI queries from VBScript file
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
T1055 injection_failed: The attempt to inject into a process has failed

Credential Access

T1003.001 dumps_lsass: Dumps lsass.exe process (probably, to extract credentials)
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1518.001 wmi_check_av: Uses WMI to check for installed antivirus software
T1057 has_wmi: Executes one or several WMI requests
T1082 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_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1016.001 system_network_configuration_discovery: System network configuration discovery detected
T1082 wscript_info_discovery: Collects info about system with Wscript.Shell
T1033 wscript_info_discovery: Collects info about system with Wscript.Shell

Command and Control

T1071 network_wscript_downloader: Wscript.exe initiated network communication
T1071.001 network_cnc_http: Suspicious HTTP traffic
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

Other

suricata_alert: Malicious traffic detected
executes_dropped_exe: Executes dropped exe files
networkdyndns_checkip: Connects to a Dynamic DNS domain
pe_in_bcryptdecrypt: PE found in BCryptDecrypt function
network_bind: Starts servers listening at None
creates_exe: Creates executable files in the file system
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
open_winlogon_process: Trying to open winlogon process
yara_rules: Static rules

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