5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946

Analysis

max time kernel
147s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
11/02/2023, 02:21

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General

Target
5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946.xls
Size 92KB
Sample230211-cs9tzadd2v
SHA256 5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946
MD5 c8d86480cae889d55896e2642369a5f1
SHA1 5912e9a715533d5b9110daab4dbafe49236c8891
SHA512 8b7182cdd30b1a95412bd847c30ff32e2493c5c445a0fcea12ce5801db7b3657a5230b328db66b44994c195862ffd7187acd972d771f8182e54b750563ef7714
SSDEEP 1536:/Vk3hOdsylKlgxopeiBNhZFGzE+cL2kdApbCXuZH4gb4CEn9J4ZKnQxW:tk3hOdsylKlgxopeiBNhZFGzE+cL2kdH
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	100	4988	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	228	4988	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5072	4988	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2680	4988	regsvr32.exe	80

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\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

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4988	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

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

description	pid	Process	procid_target
PID 4988 wrote to memory of 100	4988	EXCEL.EXE	82
PID 4988 wrote to memory of 100	4988	EXCEL.EXE	82
PID 4988 wrote to memory of 228	4988	EXCEL.EXE	83
PID 4988 wrote to memory of 228	4988	EXCEL.EXE	83
PID 4988 wrote to memory of 5072	4988	EXCEL.EXE	84
PID 4988 wrote to memory of 5072	4988	EXCEL.EXE	84
PID 4988 wrote to memory of 2680	4988	EXCEL.EXE	85
PID 4988 wrote to memory of 2680	4988	EXCEL.EXE	85

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\5ffa4cb3f7db82c5db94ff5a288f132602383e285c9f110ba3b2eae848b2e946.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:100
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv2.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:228
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv3.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:5072
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv4.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  PID:2680

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/4988-132-0x00007FFD121B0000-0x00007FFD121C0000-memory.dmp

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memory/4988-133-0x00007FFD121B0000-0x00007FFD121C0000-memory.dmp

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memory/4988-134-0x00007FFD121B0000-0x00007FFD121C0000-memory.dmp

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memory/4988-135-0x00007FFD121B0000-0x00007FFD121C0000-memory.dmp

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memory/4988-136-0x00007FFD121B0000-0x00007FFD121C0000-memory.dmp

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memory/4988-137-0x00007FFD0FD40000-0x00007FFD0FD50000-memory.dmp

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memory/4988-138-0x00007FFD0FD40000-0x00007FFD0FD50000-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