Malware Analysis Report

2025-04-03 09:43

Sample ID 230405-xvxyeaha47
Target A21619B981F4E2B4A1858F0457B42491EF99688278816.exe
SHA256 a21619b981f4e2b4a1858f0457b42491ef99688278816a66e0652d745e110bb9
Tags
systembc
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

a21619b981f4e2b4a1858f0457b42491ef99688278816a66e0652d745e110bb9

Threat Level: Known bad

The file A21619B981F4E2B4A1858F0457B42491EF99688278816.exe was found to be: Known bad.

Malicious Activity Summary

systembc

Systembc family

Drops file in Windows directory

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-04-05 19:11

Signatures

Systembc family

systembc

Analysis: behavioral1

Detonation Overview

Submitted

2023-04-05 19:11

Reported

2023-04-05 19:13

Platform

win7-20230220-en

Max time kernel

124s

Max time network

129s

Command Line

"C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe

"C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {DC290BEC-7470-4D67-9513-29BEBEC58496} S-1-5-18:NT AUTHORITY\System:Service:

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe start

Network

Country Destination Domain Proto
RO 185.198.56.2:4171 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-04-05 19:11

Reported

2023-04-05 19:13

Platform

win10v2004-20230220-en

Max time kernel

122s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe"

Signatures

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe N/A
File opened for modification C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe

"C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe"

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe

C:\Users\Admin\AppData\Local\Temp\A21619B981F4E2B4A1858F0457B42491EF99688278816.exe start

Network

Country Destination Domain Proto
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 5.233.140.95.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 45.8.109.52.in-addr.arpa udp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 131.253.33.203:80 tcp
RO 185.198.56.2:4171 tcp
US 8.8.8.8:53 2.56.198.185.in-addr.arpa udp

Files

N/A