Managed XDR

c-users-user-appdata-l...dfb89e511530e52f5e.tmp (Cobalt Strike) — malware analysis report

File info

Filename
c-users-user-appdata-local-temp-dfb89e511530e52f5e.tmp
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 936, Author: yuanhao liu, Template: Normal.dotm, Last Saved By: yuanhao liu, Revision Number: 2, Name of Creating Application: Microsoft Office Word, Total Editing Time: 01:00, Create Time/Date: Thu Oct 16 05:26:00 2025, Last Saved Time/Date: Thu Oct 16 05:26:00 2025, Number of Pages: 1, Number of Words: 0, Number of Characters: 3, Security: 0
File size
44.5 KB
First seen
Last seen

Environment

w10/x86 en

Hashes

SHA1
64649a71b2f4d797aaae065d76b3fe2415285b85
SHA256
1f7f4978e3b592c74dacecfeae7d3bc0f8fac38e99613b2a38c66cd3e20699a9
MD5
716e7075d4fa4bc96aa22840a35a75cd

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)
T1204.002 office_com_load: Microsoft Office loads COM DLL files (indicator of COM usage in macros)

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
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
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

T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Command and Control

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

Other

yara_rules: Static rules
shellcode_wininet: Wininet-shellcode behaviour detected
runs_utility_without_cmdline: Runs system utility without arguments (non-typical usage)
suspicious_process_network: Unusual process network activity detected
office_summary: The document contains suspicious metadata
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk

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