Managed XDR

cv-3.doc (Cobalt Strike) — malware analysis report

File info

Filename
cv-3.doc
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: -535, Author: Lng Khng Duy, Template: Normal.dotm, Last Saved By: Lng Khng Duy, Revision Number: 1, Name of Creating Application: Microsoft Office Word, Total Editing Time: 01:00, Create Time/Date: Thu Feb 27 10:43:00 2025, Last Saved Time/Date: Thu Feb 27 10:44:00 2025, Number of Pages: 1, Number of Words: 0, Number of Characters: 0, Security: 0
File size
42.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
079cec0ebd3f1760050bcba5e98941ecfa18a1b7
SHA256
34afde0f0155eb001fd5a858ac216d662514f2157d839661bf2dd454d067319c
MD5
1eccb30061b347cd04a5035616aad14e

Malwares

  • Cobalt Strike

Signatures

Execution

T1203 office_runs_dll: Suspicious document behaviour (tries to execute dll file)
T1559 suspicious_process: Spawns a suspicious process
T1203 office_start_thread: Allocates memory and starts a thread inside an office application
T1064 office_macros_suspicious: Document contains suspicious macro
T1064 office_macros: The document contains macro
T1064 office_macros_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)

Privilege Escalation

T1055 injection_thread: Code injection to a remote process using CreateRemoteThread or NtQueueApcThread
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

Defense Evasion

T1055 injection_thread: Code injection to a remote process using CreateRemoteThread or NtQueueApcThread
T1055.012 injection_runpe: Injects code into another process
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1064 office_macros_suspicious: Document contains suspicious macro
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
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
T1064 office_macros_autoexec: The document contains an auto-start macro

Credential Access

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

Discovery

T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1083 checks_recent_files: Attempt to check recently opened files through registry

Command and Control

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

Other

yara_rules: Static rules
shellcode_wininet: Wininet-shellcode behaviour detected
suspicious_process_network: Unusual process network activity detected
dead_host_suspicious: Connects to IP addresses with suspicious port that do not respond (possible Meterpreter)
office_summary: The document contains suspicious metadata
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
get_policy_info: Retrieves information about a Policy object
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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