Managed XDR

vtdl_iu3zc_e1 (ZLoader) — malware analysis report

File info

Filename
vtdl_iu3zc_e1
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1252, Author: IEUser, Last Saved By: IEUser, Name of Creating Application: Microsoft Excel, Create Time/Date: Wed Feb 9 07:07:29 2022, Last Saved Time/Date: Mon Feb 5 05:25:23 2024, Security: 0
File size
33.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
4d0469bc61c3731c592ce4b73218a7ea92ddf6a7
SHA256
df6e7c0e9ed6d3ca6741a16926bad1649d8a9f6aa3711bb97b5e28a483401078
MD5
56102f57b5a3fd9b24b0eb2f4758089d

Malwares

  • ZLoader

Signatures

Execution

T1064 office_macros_suspicious: Document contains suspicious macro
T1059.003 suspicious_process: Spawns a suspicious process
T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1559.001 com_exec: Execution of Win32_Process.Create COM Method
T1204.002 office_wmi_load: Microsoft Office loads WMI DLL files (WMI usage indicator in macroes)
T1203 suspicious_msapp: Suspicious execution of Microsoft Application (possible exploitation)
T1064 office_macros: The document contains macroses (total: 4)
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

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_suspicious: Document contains suspicious macro
T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1497 debugs_self: Creates a process and debugs it
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1064 office_macros: The document contains macroses (total: 4)
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

Discovery

T1497 debugs_self: Creates a process and debugs it
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
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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