Managed XDR

vtdl__onytrpm (ZLoader) — malware analysis report

File info

Filename
vtdl__onytrpm
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.1, Code page: 1252, Title: SwYi, Subject: I, Author: NOH, Last Saved By: Administrator, Revision Number: 756, Name of Creating Application: Microsoft Excel, Total Editing Time: 12:02:00, Create Time/Date: Fri Aug 30 09:14:50 2019, Last Saved Time/Date: Wed Mar 18 19:01:36 2020, Number of Pages: 2, Number of Words: 370, Number of Characters: 4835, Security: 0
File size
707.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
d291e1ff75eee2e0a35f9fafa2b55bfb51c8fce8
SHA256
a99fc0087f6d37ce46c257cd6aa3c713aedf50435b9922349fc605768aecffa7
MD5
de7440cca2bb82e97820fea428f85130

Malwares

  • ZLoader

Signatures

Execution

T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1064 office_macros: The document contains macroses (total: 3)
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

T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1027 office_macros_entropy: The document contains a macro with high entropy (a possible sign of obfuscation)
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
T1064 office_macros: The document contains macroses (total: 3)
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Discovery

T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
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
break_limit_exceeded: Warning: function calls limit has been exceeded
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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