Managed XDR

exploit_beacon_static_bypass4.rtf (Cobalt Strike) — malware analysis report

File info

Filename
exploit_beacon_static_bypass4.rtf
File type
Rich Text Format data, version 1, ANSI
File size
72.3 KB
First seen
Last seen

Environment

win7/x64 en

Hashes

SHA1
b28c44115ffcfbbe4afc8fefb9f517eba9887236
SHA256
61cb19caeb69bb9783070230c8e8fb010229abc3fd51b93cbfdf827896b2e01a
MD5
a5ca0be0c23301a78c960a4ec4a2d5a5

Malwares

  • Cobalt Strike

Signatures

Execution

T1203 office_write_exe: Office document dropped an executable file
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)

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

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497 checks_firmware: Attempts to read firmware information (potentially for evasion)
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

Credential Access

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

Discovery

T1083 checks_recent_files: Attempt to check recently opened files through registry
T1497 checks_firmware: Attempts to read firmware information (potentially for evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1135 server_share_info: Retrieves information about each shared resource on a server
T1082 checks_firmware: Attempts to read firmware information (potentially for evasion)

Command and Control

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

Other

yara_rules: Static rules
office_embedded: Office document contains embedded executable file(s)
copies_self: Creates a copy of itself
creates_exe: Creates executable files in the file system
dead_host: Connects to IP addresses that do not respond to requests
process_crashed: One of the processes has failed
unexpected_exception: Unexpected exception
create_rpc_bindings: Creates RPC connection
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

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