587e2b8ffb72f7f2bc79b2e42a31e12257562baeebaf2fad8ccc8f4050160c59

Analysis

max time kernel
135s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
15-01-2023 17:27

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General

Target

message-10112022.xls
Size

91KB
MD5

af8914bfa447416ecf6ad8c62edb1603
SHA1

027c3f2787d1bb35a4ad15ff9ca3cd1d34dda522
SHA256

587e2b8ffb72f7f2bc79b2e42a31e12257562baeebaf2fad8ccc8f4050160c59
SHA512

90881cfbc2deebe630d5e6efcc6d1d13d6e3652e1a716bd9961f4852f3dab477b38ba5ad0de4e1858d7daad2d82298762e328cf8559a898d5337dc806503cb44
SSDEEP

1536:wKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgGbCXuZH4gb4CEn9J4Z/Cs9o2:wKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgG

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://bosny.com/aspnet_client/R50QIOGjmvVlr/

xlm40.dropper

http://navylin.com/autopoisonous/4fZQW/

xlm40.dropper

http://asrani.garudaputih.com/nutabalong/bJYqoUIr99qNfoPDx/

xlm40.dropper

http://db.rikaz.tech/lCx76IlkrBtEsqNFA7/zPYJzpOnzstNOiRHob/

Signatures

Process spawned unexpected child process 4 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

regsvr32.exeregsvr32.exeregsvr32.exeregsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3784	4988	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3624	4988	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3632	4988	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4664	4988	regsvr32.exe	EXCEL.EXE

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4988 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE
4988	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4988 wrote to memory of 3784	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 3784	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 3624	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 3624	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 3632	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 3632	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 4664	4988	EXCEL.EXE	regsvr32.exe
PID 4988 wrote to memory of 4664	4988	EXCEL.EXE	regsvr32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\message-10112022.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4988

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\elv1.ooocccxxx
2⤵
- Process spawned unexpected child process
PID:3784

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\elv2.ooocccxxx
2⤵
- Process spawned unexpected child process
PID:3624

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\elv3.ooocccxxx
2⤵
- Process spawned unexpected child process
PID:3632

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\elv4.ooocccxxx
2⤵
- Process spawned unexpected child process
PID:4664

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/3624-140-0x0000000000000000-mapping.dmp

Download
memory/3632-141-0x0000000000000000-mapping.dmp

Download
memory/3784-139-0x0000000000000000-mapping.dmp

Download
memory/4664-142-0x0000000000000000-mapping.dmp

Download
memory/4988-132-0x00007FF889190000-0x00007FF8891A0000-memory.dmp

Filesize
64KB

Download
memory/4988-133-0x00007FF889190000-0x00007FF8891A0000-memory.dmp

Filesize
64KB

Download
memory/4988-134-0x00007FF889190000-0x00007FF8891A0000-memory.dmp

Filesize
64KB

Download
memory/4988-135-0x00007FF889190000-0x00007FF8891A0000-memory.dmp

Filesize
64KB

Download
memory/4988-136-0x00007FF889190000-0x00007FF8891A0000-memory.dmp

Filesize
64KB

Download
memory/4988-137-0x00007FF886CA0000-0x00007FF886CB0000-memory.dmp

Filesize
64KB

Download
memory/4988-138-0x00007FF886CA0000-0x00007FF886CB0000-memory.dmp

Filesize
64KB

Download