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

Summary | ZeroBOX

extracted_at_0x1bf88.rtf

MS_RTF_Obfuscation_Objects

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	March 16, 2023, 9:19 a.m.	March 16, 2023, 9:22 a.m.

Size	135.0B
Type	ASCII text, with no line terminators
MD5	`5b059181ad6f31e04769bd2009cb96b8`
SHA256	`687c8bb8254323ce7db3c64bb7ec35c092de70c29bd06f207ffba7229b28d7e1`
CRC32	`1E0A12BD`
ssdeep	`3:geRUFURXGXjDBUSB6xH7GNLAXAyE3BmNahQNVgpJ:V0XjDBd6xbGNLFy2ANVNub`
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_0x1bf88.rtf
872

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: 0x00000490 filepath: C:\Users\test22\AppData\Local\Temp\~$tracted_at_0x1bf88.rtf desired_access: 0x40100080 (FILE_READ_ATTRIBUTES\|SYNCHRONIZE\|GENERIC_WRITE) file_attributes: 2 (FILE_ATTRIBUTE_HIDDEN) filepath_r: \??\C:\Users\test22\AppData\Local\Temp\~$tracted_at_0x1bf88.rtf create_options: 4194400 (FILE_NON_DIRECTORY_FILE\|FILE_SYNCHRONOUS_IO_NONALERT) status_info: 2 (FILE_CREATED) share_access: 0 ()	1	0	0

File has been identified by 2 AntiVirus engines on VirusTotal as malicious (2 events)

TrendMicro	HEUR_RTFMALFORM
Zoner	Probably Heur.RTFBadHeader

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: 872 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 1 length: 4096 protection: 32 (PAGE_EXECUTE_READ) base_address: 0x7ef50000 process_handle: 0xffffffff	1	0	0