50f5316c84df540350104b16bed310b39f26ea082114e95c47f042619ddebb40

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03-01-2023 03:26

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General

Target

470c6543c277decdbc2ad9f4d825b32e22b6a1ab37fcc337645371a5a3819aac.xls
Size

255KB
MD5

73570b8824b20e00377b31b25ab5dbf8
SHA1

5715020cc77af8eb4b91debed43d0ba69dc669be
SHA256

470c6543c277decdbc2ad9f4d825b32e22b6a1ab37fcc337645371a5a3819aac
SHA512

fe84a0129cf65bb29c0b8afe4c5ced3b8b2255082f20489ff7f431f52a234d41a0e0b2750f737c3b886bc953ef4f49862652d2ef1e0ebd23620995522e78b228
SSDEEP

6144:JKpb8rGYrMPe3q7Q0XV5xtuEsi8/dggNiwrfx9rNFMMrttRzV5Dz3UxqC8LUcSf:nNbDjP9XH5XIqZLnSf

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://cpcwiki.de/images/rirOpdztUEfG7WJ/

xlm40.dropper

https://www.conceptagency.net/css/zXC/

xlm40.dropper

http://a.angel-tn.idv.tw/web_images/aa7fEDOPvT2F1i/

xlm40.dropper

http://www.atashelement.ir/qds-seo-url-autofill/tmSetsq0wxsmXdA/

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	1648	4200	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1536	4200	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	916	4200	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1856	4200	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 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

Processes:

EXCEL.EXE

pid process

4200 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4200 wrote to memory of 1648	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 1648	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 1536	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 1536	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 916	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 916	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 1856	4200	EXCEL.EXE	regsvr32.exe
PID 4200 wrote to memory of 1856	4200	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\470c6543c277decdbc2ad9f4d825b32e22b6a1ab37fcc337645371a5a3819aac.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4200

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\oxnv1.ooccxx
2⤵
- Process spawned unexpected child process
PID:1648

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\oxnv2.ooccxx
2⤵
- Process spawned unexpected child process
PID:1536

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\oxnv3.ooccxx
2⤵
- Process spawned unexpected child process
PID:916

C:\Windows\System32\regsvr32.exe
C:\Windows\System32\regsvr32.exe /S ..\oxnv4.ooccxx
2⤵
- Process spawned unexpected child process
PID:1856

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/916-141-0x0000000000000000-mapping.dmp

Download
memory/1536-140-0x0000000000000000-mapping.dmp

Download
memory/1648-139-0x0000000000000000-mapping.dmp

Download
memory/1856-142-0x0000000000000000-mapping.dmp

Download
memory/4200-132-0x00007FFB5EEB0000-0x00007FFB5EEC0000-memory.dmp

Filesize
64KB

Download
memory/4200-133-0x00007FFB5EEB0000-0x00007FFB5EEC0000-memory.dmp

Filesize
64KB

Download
memory/4200-134-0x00007FFB5EEB0000-0x00007FFB5EEC0000-memory.dmp

Filesize
64KB

Download
memory/4200-135-0x00007FFB5EEB0000-0x00007FFB5EEC0000-memory.dmp

Filesize
64KB

Download
memory/4200-136-0x00007FFB5EEB0000-0x00007FFB5EEC0000-memory.dmp

Filesize
64KB

Download
memory/4200-137-0x00007FFB5C890000-0x00007FFB5C8A0000-memory.dmp

Filesize
64KB

Download
memory/4200-138-0x00007FFB5C890000-0x00007FFB5C8A0000-memory.dmp

Filesize
64KB

Download