Malware Analysis Report

2025-03-15 06:47

Sample ID 250117-bvn5lsylak
Target 138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f
SHA256 138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f
Tags
rat orcus discovery spyware stealer
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

138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f

Threat Level: Known bad

The file 138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f was found to be: Known bad.

Malicious Activity Summary

rat orcus discovery spyware stealer

Orcus family

Orcus

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Drops desktop.ini file(s)

Drops file in Windows directory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-17 01:28

Signatures

Orcus family

orcus

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-17 01:28

Reported

2025-01-17 01:30

Platform

win7-20240903-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe"

Signatures

Orcus

rat spyware stealer orcus

Orcus family

orcus

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe

"C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe"

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.67.62.142:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.67.161.133:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.161.133:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.161.133:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp
DE 3.67.112.102:14816 5.tcp.eu.ngrok.io tcp

Files

memory/588-14-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/588-13-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/588-12-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/1836-11-0x0000000074240000-0x00000000747EB000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

MD5 87763ae22a66ea3276fe9b14d65725ea
SHA1 908228d0bba0351a4c4bf25ab4ae2b41ed520f7d
SHA256 138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f
SHA512 fdf7ba8ebc84b8cb9e3fdaf34d5c035d3456cdc671a6cf0ea1774dc73f4931d95fcdbf25605991028f5236097af6484e2aa9679baf580c15ea982e14f31f30e4

memory/1836-2-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/1836-1-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/1836-0-0x0000000074241000-0x0000000074242000-memory.dmp

memory/588-15-0x0000000074240000-0x00000000747EB000-memory.dmp

memory/588-16-0x0000000074240000-0x00000000747EB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-17 01:28

Reported

2025-01-17 01:30

Platform

win10v2004-20241007-en

Max time kernel

142s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Drops desktop.ini file(s)

Description Indicator Process Target
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A
N/A 5.tcp.eu.ngrok.io N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\assembly C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe

"C:\Users\Admin\AppData\Local\Temp\138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f.exe"

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.67.62.142:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 7.98.22.2.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
DE 3.67.62.142:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
DE 3.64.4.198:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 5.tcp.eu.ngrok.io udp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp
DE 18.158.58.205:14816 5.tcp.eu.ngrok.io tcp

Files

memory/3668-0-0x0000000074A22000-0x0000000074A23000-memory.dmp

memory/3668-1-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/3668-2-0x0000000074A20000-0x0000000074FD1000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

MD5 87763ae22a66ea3276fe9b14d65725ea
SHA1 908228d0bba0351a4c4bf25ab4ae2b41ed520f7d
SHA256 138b682d76b3ec1a4a84406c3f6a0ee2da29bec0ae6feb6c05f7b6c8eb98b96f
SHA512 fdf7ba8ebc84b8cb9e3fdaf34d5c035d3456cdc671a6cf0ea1774dc73f4931d95fcdbf25605991028f5236097af6484e2aa9679baf580c15ea982e14f31f30e4

memory/1856-18-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/1856-21-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/1856-20-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/3668-19-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/1856-22-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/1856-23-0x0000000074A20000-0x0000000074FD1000-memory.dmp

memory/1856-24-0x0000000074A20000-0x0000000074FD1000-memory.dmp