Malware Analysis Report

2024-11-13 18:30

Sample ID 241106-s57hdashjg
Target acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N
SHA256 acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252
Tags
skuld persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252

Threat Level: Known bad

The file acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N was found to be: Known bad.

Malicious Activity Summary

skuld persistence

Skuld family

Adds Run key to start application

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Views/modifies file attributes

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-06 15:43

Signatures

Skuld family

skuld

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-06 15:43

Reported

2024-11-06 15:45

Platform

win7-20240903-en

Max time kernel

15s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe

"C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe"

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-06 15:43

Reported

2024-11-06 15:45

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe"

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe" C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe N/A

Views/modifies file attributes

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

Processes

C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe

"C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe"

C:\Windows\system32\attrib.exe

attrib +h +s C:\Users\Admin\AppData\Local\Temp\acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252N.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

N/A