Managed XDR

vtdl_9k28r5l7 — malware analysis report

File info

Filename
vtdl_9k28r5l7
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: -535, Author: LE ANH TU, Last Saved By: Thy Dng Vn, Name of Creating Application: Microsoft Excel, Last Printed: Fri Sep 29 07:56:45 2023, Create Time/Date: Mon Oct 14 23:33:28 1996, Last Saved Time/Date: Sat Feb 3 00:19:46 2024, Security: 0
File size
97.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
d3e330f7d2987206222626cb11198eaa13d3c681
SHA256
3e35b6f8afb6ddd6c52f9e3b5895f6c14f36899b761fab1de2dd1917574202be
MD5
4ad5abc94afbf3672aa413266241dd42

Signatures

Initial Access

T1192 html_urls: HTML-document downloads a file

Execution

T1064 office_macros: The document contains macroses (total: 4)
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

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

T1096 persistence_ads: Creates Alternate Data Stream (ADS)
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1027 office_macros_entropy: The document contains a macro with high entropy (a possible sign of obfuscation)
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 macroses (total: 4)
T1064 office_macros_autoexec: The document contains an auto-start macro

Discovery

T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1083 checks_recent_files: Attempt to check recently opened files through registry

Other

yara_rules: Static rules
pdf_page: Contains only one page
office_summary: The document contains suspicious metadata
pdf_compressed_stream: Contains an object with compressed stream
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
office_links: Office file contains external links
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call