Managed XDR

threat-alert.doc (Cobalt Strike) — malware analysis report

File info

Filename
threat-alert.doc
File type
Rich Text Format data, version 1, unknown character set
File size
622.6 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
5ffd55b4edbbb1561c6509d4e336a91f41f2c88f
SHA256
58fa966a4832e89ed83df3ccdeaeef95d20263ec34c423fa4df3623e446fce18
MD5
1e66dcad77066aae998cc6178a1cb3c8

Malwares

  • Cobalt Strike

Signatures

Execution

T1203 exploit_CVE_2017_11882: Exploits CVE-2017-11882 vulnerability
T1203 office_write_exe: Office document dropped an executable file

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
T1574 dropper_dll: Creates DLL, which is then loaded into the 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

Defense Evasion

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
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
T1070 stealth_window: A process created a hidden window
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Credential Access

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

Discovery

T1057 process_interest: Enumerates processes
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1135 server_share_info: Retrieves information about each shared resource on a server
T1083 checks_recent_files: Attempt to check recently opened files through registry

Other

yara_rules: Static rules
ce_info: CobaltStrike Configuration Data found
cobaltstrike_beacon: Memory region specific for CobaltStrike beacon was found
office_embedded: Office document contains embedded executable file(s)
creates_exe: Creates executable files in the file system
executes_dropped_exe: Executes dropped exe files
copies_self: Creates a copy of itself
dns_without_resolve: DNS query without a response
suspicious_process: Spawns a suspicious process
unexpected_exception: Unexpected exception
valid_authenticode: The digital signature has been verified
create_rpc_bindings: Creates RPC connection
has_pdb: This executable file has a PDB path
get_policy_info: Retrieves information about a Policy object
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call
pe_overlay: PE file contains overlay

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