Managed XDR

c-users-user-desktop-4fe60000 (ZLoader) — malware analysis report

File info

Filename
c-users-user-desktop-4fe60000
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1252, Author: Test, Last Saved By: User, Name of Creating Application: Microsoft Excel, Create Time/Date: Fri Jun 5 18:17:20 2015, Last Saved Time/Date: Mon Sep 21 22:18:45 2026, Security: 0
File size
224.5 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
b1917066b9fed706f56e7b4b8d32d5c1444e6148
SHA256
95afb396b565e49e60a28f4dddf42810cfc42d0bc6447361babe91eb74e0342c
MD5
57e015f09894101490d6f544e6afce2c

Malwares

  • ZLoader

Signatures

Execution

T1203 office_runs_dll: Suspicious document behavior (tries to execute DLL file in hidden window)
T1559 suspicious_process: Spawns a suspicious process
T1203 office_exploit_http: The document exhibits suspicious behavior (performs HTTP requests)
T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests
T1064 office_macros_suspicious: Document contains suspicious macro
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)
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
T1055 injection_failed: The attempt to inject into a process has failed

Defense Evasion

T1064 office_macros_hidden: Document contains suspicious Excel 4.0 macro
T1027 office_macros_empty_space: The document contains a macro with a lot of spaces or empty lines
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1064 office_macros_suspicious: Document contains suspicious macro
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey
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_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro
T1055 injection_failed: The attempt to inject into a process has failed

Credential Access

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

Discovery

T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1057 has_wmi: Executes one or several WMI requests
T1082 has_wmi: Executes one or several WMI requests
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey

Command and Control

T1071.001 office_exploit_http: The document exhibits suspicious behavior (performs HTTP requests)
T1071.004 office_exploit_dns: The document exhibits suspicious behavior (performs DNS requests)
T1071.001 network_http: Performs HTTP requests
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
network_bind: Starts servers listening at None
dead_host: Connects to IP addresses that do not respond to requests
office_summary: The document contains suspicious metadata
creates_suspended_process: Creates suspended process
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services

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