Managed XDR

prbz367498955_3_23.xls — malware analysis report

File info

Filename
prbz367498955_3_23.xls
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.1, Code page: -535, Name of Creating Application: Microsoft Excel, Last Printed: Fri Apr 14 14:19:05 2023, Create Time/Date: Wed May 30 13:41:53 2001, Last Saved Time/Date: Mon Feb 17 12:41:11 2025, Security: 0
File size
419 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
e88af0d32c775732d448121a34578736d118a067
SHA256
824ae8a274c618688513d219a8dc33d3ca30fa969dc490e437b58e71207b1664
MD5
bbb22b4d0c2ae980105be198f50bffbc

Signatures

Execution

T1203 office_write_exe: Office document dropped an executable file
T1203 office_runs_dll: Suspicious document behaviour (tries to execute dll file)
T1203 office_exploit_http: The document exhibits suspicious behaviour (performs HTTP requests)
T1559 suspicious_process: Spawns a suspicious process
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)

Persistence

T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1574 dropper_dll: Creates DLL, which is then loaded into the process
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

T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1070 stealth_window: A process created a hidden window

Credential Access

T1552 cookie_files: Accesses cookie files
T1555.003 cookie_files: Accesses cookie files

Discovery

T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1083 checks_recent_files: Attempt to check recently opened files through registry

Command and Control

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

Other

yara_rules: Static rules
creates_exe: Creates executable files in the file system
create_process_failed: Could not start the process
suspicious_process_network: Unusual process network activity detected
dns_without_resolve: DNS query without a response
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
office_links: Office file contains external links
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card