d1b96cd803dc7ac7daeb7554dadf69542979c3d7a65cfa07fb5fec8dafb5623e

Analysis

max time kernel
158s
max time network
210s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01-12-2022 06:34

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General

Target

d1b96cd803dc7ac7daeb7554dadf69542979c3d7a65cfa07fb5fec8dafb5623e.xls
Size

86KB
MD5

352b509a254d2e67c14117a3d8eecd3c
SHA1

ca607e6504eefbe03e85d5fb727f328568b8ac77
SHA256

d1b96cd803dc7ac7daeb7554dadf69542979c3d7a65cfa07fb5fec8dafb5623e
SHA512

a9c9cb8f2746fcd144090f5fa15f752030983203ada3619f20e5ff8b21d6388a4e3df6c1c7261052de1149305546cccaf2d0c2af17a1f6e9a27dadc22e013679
SSDEEP

1536:8fcKoSsxz1PDZLDZjlbR868O8Kfc03V7uDphYHceXVhca+fMHLtyeGx2zZ8dIOii:8fcKoSsxzNDZLDZjlbR868O8Kfc03V74

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://qab26utxb02pquc.com/fera/frid.gif

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

rundll32.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	3768	1868	rundll32.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\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

1868 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE
1868	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1868 wrote to memory of 3768	1868	EXCEL.EXE	rundll32.exe
PID 1868 wrote to memory of 3768	1868	EXCEL.EXE	rundll32.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\d1b96cd803dc7ac7daeb7554dadf69542979c3d7a65cfa07fb5fec8dafb5623e.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1868

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\nxckew.wle,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3768

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/1868-132-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/1868-133-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/1868-134-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/1868-135-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/1868-136-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/1868-137-0x00007FFA8EFD0000-0x00007FFA8EFE0000-memory.dmp

Filesize
64KB

Download
memory/1868-138-0x00007FFA8EFD0000-0x00007FFA8EFE0000-memory.dmp

Filesize
64KB

Download
memory/3768-139-0x0000000000000000-mapping.dmp

Download