2c27a384cd594f6c995f9d6b1eb5dbc478f31a6eeb1f993b4607324627388abb

Analysis

max time kernel
149s
max time network
148s
platform
windows10-1703_x64
resource
win10-20220901-en
resource tags

arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
submitted
09/11/2022, 18:05

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General

Target
2c27a384cd594f6c995f9d6b1eb5dbc478f31a6eeb1f993b4607324627388abb.xls
Size 91KB
Sample221109-wpedfacfbm
SHA256 2c27a384cd594f6c995f9d6b1eb5dbc478f31a6eeb1f993b4607324627388abb
MD5 2fed1b2e4d45c72f71f527d48820076f
SHA1 7a63575c0042ba11a7bd010ecea863a6fa6d84c8
SHA512 d3f6fe60f96ac3570964a9d9c0bda0008158390f0333812942e6e67e38f2bde38db3679638732d92199edce2a01f37d27f8d13892a6f0fbf25fb76c633a54be8
SSDEEP 1536:LKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgEbCXuZH4gb4CEn9J4Z8EM:LKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgV
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.muyehuayi.com/cmp/8asA99KPsyA/v6lUsWbLen/
xlm40.dropper
http://concivilpa.com.py/wp-admin/i3CQu9dzDrMW/
xlm40.dropper
https://wijsneusmedia.nl/cgi-bin/kFB/
xlm40.dropper
http://www.angloextrema.com.br/assets/oEt1yYckHKlnNIq/

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	4348	4824	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4656	4824	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3544	4824	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4460	4824	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 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

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
4824	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4824	EXCEL.EXE
4824	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE
4824	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 4348	4824	EXCEL.EXE	68
PID 4824 wrote to memory of 4348	4824	EXCEL.EXE	68
PID 4824 wrote to memory of 4656	4824	EXCEL.EXE	69
PID 4824 wrote to memory of 4656	4824	EXCEL.EXE	69
PID 4824 wrote to memory of 3544	4824	EXCEL.EXE	70
PID 4824 wrote to memory of 3544	4824	EXCEL.EXE	70
PID 4824 wrote to memory of 4460	4824	EXCEL.EXE	71
PID 4824 wrote to memory of 4460	4824	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\2c27a384cd594f6c995f9d6b1eb5dbc478f31a6eeb1f993b4607324627388abb.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:4824
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv1.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:4348
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv2.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:4656
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv3.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:3544
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv4.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:4460

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/4824-120-0x00007FF9500F0000-0x00007FF950100000-memory.dmp

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memory/4824-121-0x00007FF9500F0000-0x00007FF950100000-memory.dmp

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memory/4824-122-0x00007FF9500F0000-0x00007FF950100000-memory.dmp

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memory/4824-123-0x00007FF9500F0000-0x00007FF950100000-memory.dmp

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memory/4824-132-0x00007FF94CC80000-0x00007FF94CC90000-memory.dmp

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memory/4824-133-0x00007FF94CC80000-0x00007FF94CC90000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads