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

latestReport
11.20 09:11
mainbas.bat
11.20 09:11
dll007.dll
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dll004.dll
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11.20 09:11
DKM-9067291.pdf.lnk

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Summary | ZeroBOX

keep-1295373157.xls

Downloader MSOffice File

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	Nov. 9, 2021, 2:11 p.m.	Nov. 9, 2021, 2:17 p.m.

Size	105.5KB
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: Mon Nov 8 07:22:30 2021, Security: 0
MD5	`3bba7ba332871b9f9113db6e878adabb`
SHA256	`101099baef933c2655127849fb6db2741ca8fe0f1f9b4cec6a9d3c1d5c4ace50`
CRC32	`3242CBC9`
ssdeep	`3072:vKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg2MvmwnAf/pOr7U3:vKpb8rGYrMPe3q7Q0XV5xtuEsi8/dg29`
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\keep-1295373157.xls
2308
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good.good
  2536
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good1.good
  2576
- regsvr32.exe "C:\Windows\System32\regsvr32.exe" C:\Datop\good2.good
  2616

Name	Response	Post-Analysis Lookup
dongarza.com	A 167.250.5.42	167.250.5.42
headlinepost.net	A 162.241.169.247	162.241.169.247

IP Address	Status	Action
162.241.169.247	Active	Moloch
164.124.101.2	Active	Moloch
167.250.5.42	Active	Moloch

Suricata Alerts

Flow	SID	Signature	Category
TCP 192.168.56.103:49163 -> 167.250.5.42:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 162.241.169.247:443 -> 192.168.56.103:49169	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49171 -> 162.241.169.247:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49167 -> 162.241.169.247:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 162.241.169.247:443 -> 192.168.56.103:49173	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49164 -> 167.250.5.42:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 192.168.56.103:49172 -> 162.241.169.247:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined
TCP 167.250.5.42:443 -> 192.168.56.103:49165	2029340	ET INFO TLS Handshake Failure	Potentially Bad Traffic
TCP 192.168.56.103:49168 -> 162.241.169.247:443	906200056	SSLBL: Malicious JA3 SSL-Client Fingerprint detected (Tofsee)	undefined

Suricata TLS

No Suricata TLS

Allocates read-write-execute memory (usually to unpack itself) (2 events)

Time & API	Arguments	Status	Return	Repeated
NtProtectVirtualMemory Nov. 9, 2021, 2:11 p.m.	process_identifier: 2308 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	0	0
NtProtectVirtualMemory Nov. 9, 2021, 2:11 p.m.	process_identifier: 2308 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x6b0e2000 process_handle: 0xffffffff	1	0	0

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. 9, 2021, 2:11 p.m.	process_identifier: 2308 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	Status	Return	Repeated
URLDownloadToFileW Nov. 9, 2021, 2:11 p.m.	url: https://dongarza.com/gJW5ma382Z/x.html stack_pivoted: 0 filepath_r: C:\Datop\good.good filepath: C:\Datop\good.good		2148270085	0
URLDownloadToFileW Nov. 9, 2021, 2:11 p.m.	url: https://headlinepost.net/3AkrPbRj/x.html stack_pivoted: 0 filepath_r: C:\Datop\good1.good filepath: C:\Datop\good1.good		2148270085	0
URLDownloadToFileW Nov. 9, 2021, 2:11 p.m.	url: https://headlinepost.net/3AkrPbRj/x.html stack_pivoted: 0 filepath_r: C:\Datop\good2.good filepath: C:\Datop\good2.good		2148270085	0

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