b8a2a6f7a99fdde3d1fb5b797f6234b9fd076ca10fe4bf91ab0ea6d991c502a7

Analysis

max time kernel
149s
max time network
149s
platform
windows10-1703_x64
resource
win10-20220901-en
resource tags

arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
submitted
04/11/2022, 12:01

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General

Target

b8a2a6f7a99fdde3d1fb5b797f6234b9fd076ca10fe4bf91ab0ea6d991c502a7.xls
Size

217KB
MD5

be6a542ef8f109c6f94b279f9c1fe11e
SHA1

0b588ef7e4ce91910e6d3d8aa7c9dd4adac863bb
SHA256

b8a2a6f7a99fdde3d1fb5b797f6234b9fd076ca10fe4bf91ab0ea6d991c502a7
SHA512

9e0d45c0a4b3470a9be9d57e10868a04b06986f49bb0f60283fc6aefd7335a72f294f26744e0220205c52750c5614eed5e96423ee40d5888f46c8228a74ae162
SSDEEP

6144:OKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgIyY+TAQXTHGUMEyP5p6f5jQmG:bbGUMVWlbG

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://cursosinterativos.com.br/semprichickoff2/pEl/

xlm40.dropper

http://mulmatdol.com/adm/Fa/

xlm40.dropper

http://www.tugarden.com/docs/csv_import/rf6bMPAtbBPiDK/

xlm40.dropper

http://www.darularqompatean.com/asq/IcVMFfwR65Yf8fMd5G/

Signatures

Process spawned unexpected child process 4 IoCs

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

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4292	2552	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4020	2552	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5084	2552	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5100	2552	regsvr32.exe	65

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

pid	Process
2552	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2552	EXCEL.EXE
2552	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE
2552	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 4292	2552	EXCEL.EXE	68
PID 2552 wrote to memory of 4292	2552	EXCEL.EXE	68
PID 2552 wrote to memory of 4020	2552	EXCEL.EXE	69
PID 2552 wrote to memory of 4020	2552	EXCEL.EXE	69
PID 2552 wrote to memory of 5084	2552	EXCEL.EXE	70
PID 2552 wrote to memory of 5084	2552	EXCEL.EXE	70
PID 2552 wrote to memory of 5100	2552	EXCEL.EXE	71
PID 2552 wrote to memory of 5100	2552	EXCEL.EXE	71

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\b8a2a6f7a99fdde3d1fb5b797f6234b9fd076ca10fe4bf91ab0ea6d991c502a7.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv1.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4292
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv2.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4020
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv3.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:5084
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv4.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:5100

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2552-120-0x00007FFCD2610000-0x00007FFCD2620000-memory.dmp

Filesize
64KB

Download
memory/2552-121-0x00007FFCD2610000-0x00007FFCD2620000-memory.dmp

Filesize
64KB

Download
memory/2552-122-0x00007FFCD2610000-0x00007FFCD2620000-memory.dmp

Filesize
64KB

Download
memory/2552-123-0x00007FFCD2610000-0x00007FFCD2620000-memory.dmp

Filesize
64KB

Download
memory/2552-132-0x00007FFCCF370000-0x00007FFCCF380000-memory.dmp

Filesize
64KB

Download
memory/2552-133-0x00007FFCCF370000-0x00007FFCCF380000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads