Managed XDR

vtdl_wj7x2iu8 (Cobalt Strike) — malware analysis report

File info

Filename
vtdl_wj7x2iu8
File type
Microsoft Excel 2007+
File size
1.4 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
22734e9ae250d9b3e18aee7e24b2701b7d293dfe
SHA256
2711692dee019ab490c010da5566be09c7b6850519823f57b39df6add3453717
MD5
a370015d2892d60166d2bff0f7e40c55

Malwares

  • Cobalt Strike

Signatures

Execution

T1203 office_write_exe: Office document dropped an executable file
T1203 office_exploit_http: The document exhibits suspicious behaviour (performs HTTP requests)
T1059 autoit: AutoIt script execution detected
T1064 office_macros: The document contains macro
T1064 office_macros_strings: Feature lines found in document macro
T1047 has_wmi: Executes one or several WMI requests

Privilege Escalation

T1134.004 ppid_spoofing: Parent pid spoofing detected
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
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

T1134.004 ppid_spoofing: Parent pid spoofing detected
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.001 antivm_queries_computername: Retrieves the computer name
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1064 office_macros: The document contains macro
T1064 office_macros_strings: Feature lines found in document macro
T1070 stealth_window: A process created a hidden window
T1055 injection_failed: The attempt to inject into a process has failed

Credential Access

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

Discovery

T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1057 process_interest: Enumerates processes
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.001 antivm_queries_computername: Retrieves the computer name
T1083 checks_recent_files: Attempt to check recently opened files through registry
T1082 reads_csrss: Attempts to read csrss.exe memory
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1016.001 system_network_configuration_discovery: System network configuration discovery detected

Command and Control

T1105 office_dl_write_exe: Probably malicious office document (downloads/drops EXE files to disk)
T1071.001 office_exploit_http: The document exhibits suspicious behaviour (performs HTTP requests)
T1105 suspicious_download: Attempts to download suspicious file
T1071.004 office_exploit_dns: The document exhibits suspicious behaviour (performs DNS requests)
T1568.002 dga_domains: Connects to DGA domains
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
yara_rules: Static rules
unpacker_wrong_base: Possibly, an error occured in the file unpacker
drops_interpreter: Creates intrepreter binary file
creates_exe: Creates executable files in the file system
multiple_useragents: Uses more than one unique User-Agent
dns_without_resolve: DNS query without a response
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
get_policy_info: Retrieves information about a Policy object
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call

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