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Guide 2020-06-10
Version history 2020-06-10

Summary | ZeroBOX

extracted_at_0x1fefb.rtf

MS_RTF_Obfuscation_Objects

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	March 16, 2023, 9:52 a.m.	March 16, 2023, 9:54 a.m.

Size	118.0B
Type	ASCII text, with CRLF line terminators
MD5	`04d073434805a5b1c8a414b67120ebc0`
SHA256	`6e2958663ece5b29055a50a3d37b0168e168fb72f9a1119c564269739cbc3ed1`
CRC32	`30820E6E`
ssdeep	`3:geRUFURXGXjDNXW12W5GN+XWAxeXHvGNabKxRW+uATY:V0XjDNG1X5GNL1XeN3xRWrATY`
Yara	MS_RTF_Suspicious_documents - Suspicious documents using RTF document OLE object

WINWORD.EXE "C:\Program Files (x86)\Microsoft Office\Office15\WINWORD.EXE" C:\Users\test22\AppData\Local\Temp\extracted_at_0x1fefb.rtf
184

Name	Response	Post-Analysis Lookup
No hosts contacted.

IP Address	Status	Action
No hosts contacted.

Suricata Alerts

No Suricata Alerts

Suricata TLS

No Suricata TLS

Creates hidden or system file (1 event)

Time & API	Arguments	Status	Return	Repeated
NtCreateFile March 16, 2023, 9:19 a.m.	create_disposition: 5 (FILE_OVERWRITE_IF) file_handle: 0x0000048c filepath: C:\Users\test22\AppData\Local\Temp\~$tracted_at_0x1fefb.rtf desired_access: 0x40100080 (FILE_READ_ATTRIBUTES\|SYNCHRONIZE\|GENERIC_WRITE) file_attributes: 2 (FILE_ATTRIBUTE_HIDDEN) filepath_r: \??\C:\Users\test22\AppData\Local\Temp\~$tracted_at_0x1fefb.rtf create_options: 4194400 (FILE_NON_DIRECTORY_FILE\|FILE_SYNCHRONOUS_IO_NONALERT) status_info: 2 (FILE_CREATED) share_access: 0 ()	1	0	0

Changes read-write memory protection to read-execute (probably to avoid detection when setting all RWX flags at the same time) (1 event)

Time & API	Arguments	Status	Return	Repeated
NtProtectVirtualMemory March 16, 2023, 9:19 a.m.	process_identifier: 184 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 1 length: 4096 protection: 32 (PAGE_EXECUTE_READ) base_address: 0x7ef70000 process_handle: 0xffffffff	1	0	0