Malware Analysis Report

2025-01-22 15:11

Sample ID 240218-bk2b7acb9s
Target 4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0
SHA256 4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0
Tags
orcus
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

4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0

Threat Level: Known bad

The file 4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0 was found to be: Known bad.

Malicious Activity Summary

orcus

Orcus family

Orcus main payload

Orcurs Rat Executable

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-02-18 01:12

Signatures

Orcurs Rat Executable

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

Orcus family

orcus

Orcus main payload

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-18 01:12

Reported

2024-02-18 01:15

Platform

win7-20231215-en

Max time kernel

117s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2060 wrote to memory of 2848 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-18 01:12

Reported

2024-02-18 01:15

Platform

win10v2004-20231222-en

Max time kernel

93s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3768 wrote to memory of 3760 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3768 wrote to memory of 3760 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3768 wrote to memory of 3760 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d8f54b347c038242af3701c2ae66de6df545f345713f3f224b7e11805f9b0e0.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3760 -ip 3760

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3760 -s 600

Network

Country Destination Domain Proto
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp

Files

N/A