Managed XDR

vtdl_fcexz0z3 (ZLoader) — malware analysis report

File info

Filename
vtdl_fcexz0z3
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1252, Author: User, Last Saved By: Nancy Baughman, Last Printed: Thu Mar 4 15:10:34 2021, Create Time/Date: Tue Oct 17 19:53:50 2017, Last Saved Time/Date: Wed Feb 14 20:35:17 2024, Security: 0
File size
76 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
818f6d59a8cbd4a2433bfeb1bbf6f15ef3cdbbe0
SHA256
bf6b5bd40b1789fbbbc14e3a281288af3ac72580a798bccd3ca5656ec2b264a1
MD5
a3f2d6e397daf09653cb1c58bf9b8819

Malwares

  • ZLoader

Signatures

Initial Access

T1192 html_urls: HTML-document downloads a file

Execution

T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)
T1064 office_macros: The document contains macroses (total: 3)

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)
T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
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: 3)

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

Other

yara_rules: Static rules
office_summary: The document contains suspicious metadata
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

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