Malware Analysis Report

2024-11-13 16:42

Sample ID 230228-b9tzeagg9s
Target Nmzquuiantsnzvtelvd.dll
SHA256 695e7e6b183b7b57c8b7113cb2d771a44e33d8d8158b2c74bbd9e71ddb860699
Tags
loader purecrypter
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

695e7e6b183b7b57c8b7113cb2d771a44e33d8d8158b2c74bbd9e71ddb860699

Threat Level: Known bad

The file Nmzquuiantsnzvtelvd.dll was found to be: Known bad.

Malicious Activity Summary

loader purecrypter

Detect PureCrypter injector

Purecrypter family

Suspicious behavior: CmdExeWriteProcessMemorySpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-02-28 01:51

Signatures

Detect PureCrypter injector

loader
Description Indicator Process Target
N/A N/A N/A N/A

Purecrypter family

purecrypter

Analysis: behavioral1

Detonation Overview

Submitted

2023-02-28 01:51

Reported

2023-02-28 01:53

Platform

win7-20230220-en

Max time kernel

119s

Max time network

107s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Nmzquuiantsnzvtelvd.dll,#1

Signatures

Suspicious behavior: CmdExeWriteProcessMemorySpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1016 wrote to memory of 1728 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1728 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1728 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1728 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1728 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1784 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1784 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1784 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1784 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1016 wrote to memory of 1784 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Nmzquuiantsnzvtelvd.dll,#1

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe"

C:\Windows\system32\regsvr32.exe

regsvr32 /ds Nmzquuiantsnzvtelvd.dll

C:\Windows\system32\regsvr32.exe

regsvr32 /s Nmzquuiantsnzvtelvd.dll

Network

N/A

Files

memory/1728-54-0x00000000004B0000-0x00000000004B1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-02-28 01:51

Reported

2023-02-28 01:54

Platform

win10-20230220-en

Max time kernel

165s

Max time network

180s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Nmzquuiantsnzvtelvd.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2308 wrote to memory of 3044 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2308 wrote to memory of 3044 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2308 wrote to memory of 1220 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2308 wrote to memory of 1220 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Nmzquuiantsnzvtelvd.dll,#1

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe"

C:\Windows\system32\regsvr32.exe

regsvr32 Nmzquuiantsnzvtelvd.dll

C:\Windows\system32\regsvr32.exe

regsvr32 /s Nmzquuiantsnzvtelvd.dll

Network

Country Destination Domain Proto
US 13.89.179.8:443 tcp
NL 8.253.208.120:80 tcp
US 8.8.8.8:53 64.13.109.52.in-addr.arpa udp
US 93.184.220.29:80 tcp

Files

N/A