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

Summary | ZeroBOX

recital-148818831.xls

MSOffice File

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	Oct. 2, 2021, 1:04 p.m.	Oct. 2, 2021, 1:08 p.m.

Size	243.0KB
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: Fri Oct 1 10:25:34 2021, Security: 0
MD5	`a2cd903ab4c01af3b11b26e067ecaa79`
SHA256	`c2d8263aaa72ad63f14270ec54738ab26c6fd7d8e1c284b55c1914404c1446a8`
CRC32	`304A6D55`
ssdeep	`6144:aKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgx93WPcZZRRrq1RObTwvOkPDklgvS3+nQ7E:N93tDrmcbTwvzD63fLvfP1GOS`
Yara	Microsoft_Office_File_Zero - Microsoft Office File

EXCEL.EXE "C:\Program Files (x86)\Microsoft Office\Office15\EXCEL.EXE" C:\Users\test22\AppData\Local\Temp\recital-148818831.xls
2500
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test1.test
  2768
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test.test
  352
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test2.test
  3040

Name	Response	Post-Analysis Lookup
artadidactica.ro	A 89.40.71.2	89.40.71.2
sanbari.mx	A 162.215.210.215	162.215.210.215
surveillantfire.com	A 50.87.147.76	50.87.147.76

IP Address	Status	Action
162.215.210.215	Active	Moloch
164.124.101.2	Active	Moloch
50.87.147.76	Active	Moloch
89.40.71.2	Active	Moloch

Suricata Alerts

No Suricata Alerts

Suricata TLS

No Suricata TLS

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

Time & API	Arguments	Status	Return	Repeated
NtProtectVirtualMemory Oct. 2, 2021, 1:04 p.m.	process_identifier: 2500 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6bf98000 process_handle: 0xffffffff	1	0	0
NtProtectVirtualMemory Oct. 2, 2021, 1:04 p.m.	process_identifier: 2500 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6b312000 process_handle: 0xffffffff	1	0	0
NtProtectVirtualMemory Oct. 2, 2021, 1:04 p.m.	process_identifier: 2768 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c471000 process_handle: 0xffffffff	1	0	0
NtProtectVirtualMemory Oct. 2, 2021, 1:04 p.m.	process_identifier: 352 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c471000 process_handle: 0xffffffff	1	0	0
NtProtectVirtualMemory Oct. 2, 2021, 1:04 p.m.	process_identifier: 3040 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6c471000 process_handle: 0xffffffff	1	0	0

Creates a suspicious process (6 events)

cmdline	regsvr32 C:\Datop\test.test
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\test2.test
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\test1.test
cmdline	"C:\Windows\System32\regsvr32.exe" C:\Datop\test.test
cmdline	regsvr32 C:\Datop\test1.test
cmdline	regsvr32 C:\Datop\test2.test

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 Oct. 2, 2021, 1:04 p.m.	process_identifier: 2500 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

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

Time & API	Arguments	Status	Return	Repeated
URLDownloadToFileW Oct. 2, 2021, 1:04 p.m.	url: https://surveillantfire.com/sFujOeiM0VB/alp.html stack_pivoted: 0 filepath_r: C:\Datop\test.test filepath: C:\Datop\test.test		2148270085	0
URLDownloadToFileW Oct. 2, 2021, 1:04 p.m.	url: https://artadidactica.ro/8dsjAbBmIJUu/alp.html stack_pivoted: 0 filepath_r: C:\Datop\test1.test filepath: C:\Datop\test1.test		2148270085	0
URLDownloadToFileW Oct. 2, 2021, 1:04 p.m.	url: https://sanbari.mx/MsP8e5Yxp/alp.html stack_pivoted: 0 filepath_r: C:\Datop\test2.test filepath: C:\Datop\test2.test		2148270085	0

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

parent_process	excel.exe				martian_process	regsvr32 C:\Datop\test.test
parent_process	excel.exe				martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\test2.test
parent_process	excel.exe				martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\test1.test
parent_process	excel.exe				martian_process	"C:\Windows\System32\regsvr32.exe" C:\Datop\test.test
parent_process	excel.exe				martian_process	regsvr32 C:\Datop\test1.test
parent_process	excel.exe				martian_process	regsvr32 C:\Datop\test2.test

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

file	C:\Windows\System32\regsvr32.exe