Malware Analysis Report

2025-03-15 06:47

Sample ID 250114-k73yzawkgq
Target idk.exe
SHA256 bbc6bbbf62040d31c403ebb6cc1fde194f4676c3f7dde52af531d88aefc0238b
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

bbc6bbbf62040d31c403ebb6cc1fde194f4676c3f7dde52af531d88aefc0238b

Threat Level: Known bad

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

Malicious Activity Summary

rat orcus discovery spyware stealer

Orcus family

Orcus

Executes dropped EXE

Checks computer location settings

Drops desktop.ini file(s)

Legitimate hosting services abused for malware hosting/C2

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Suspicious use of FindShellTrayWindow

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-14 09:15

Signatures

Orcus family

orcus

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-14 09:15

Reported

2025-01-14 09:18

Platform

win10ltsc2021-20250113-en

Max time kernel

144s

Max time network

146s

Command Line

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

Signatures

Orcus

rat spyware stealer orcus

Orcus family

orcus

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2503671516-4119152987-701077851-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\idk.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 opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A 6.tcp.eu.ngrok.io N/A N/A
N/A 6.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\idk.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.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\idk.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 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\idk.exe

"C:\Users\Admin\AppData\Local\Temp\idk.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 6.tcp.eu.ngrok.io udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
DE 52.28.247.255:14311 6.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 255.247.28.52.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 6.tcp.eu.ngrok.io udp
DE 3.66.38.117:14311 6.tcp.eu.ngrok.io tcp

Files

memory/4508-0-0x0000000075352000-0x0000000075353000-memory.dmp

memory/4508-1-0x0000000075350000-0x0000000075901000-memory.dmp

memory/4508-2-0x0000000075350000-0x0000000075901000-memory.dmp

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

MD5 4430b4864bdb0536bb555c64f90a6fdf
SHA1 9692cd79639a1f228a389472b65ab04f3c016536
SHA256 bbc6bbbf62040d31c403ebb6cc1fde194f4676c3f7dde52af531d88aefc0238b
SHA512 b030596c8e6d605088f8bc503f0fe012cdf2398109459766dfbaf647070fe1cac3940292bd0089e334da309989129df0f6577fcfdbda58e0d15a10a8d43a436b

memory/4508-8-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-7-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-10-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-9-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-11-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-12-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-13-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-14-0x0000000075350000-0x0000000075901000-memory.dmp

memory/1752-15-0x0000000075350000-0x0000000075901000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-14 09:15

Reported

2025-01-14 09:18

Platform

win11-20241007-en

Max time kernel

147s

Max time network

150s

Command Line

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

Signatures

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\idk.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A 6.tcp.eu.ngrok.io N/A N/A
N/A 6.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\idk.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\idk.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\idk.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 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\idk.exe

"C:\Users\Admin\AppData\Local\Temp\idk.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 6.tcp.eu.ngrok.io udp
DE 52.28.247.255:14311 6.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 255.247.28.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
DE 3.66.38.117:14311 6.tcp.eu.ngrok.io tcp

Files

memory/2252-0-0x0000000074E71000-0x0000000074E72000-memory.dmp

memory/2252-1-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/2252-2-0x0000000074E70000-0x0000000075421000-memory.dmp

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

MD5 4430b4864bdb0536bb555c64f90a6fdf
SHA1 9692cd79639a1f228a389472b65ab04f3c016536
SHA256 bbc6bbbf62040d31c403ebb6cc1fde194f4676c3f7dde52af531d88aefc0238b
SHA512 b030596c8e6d605088f8bc503f0fe012cdf2398109459766dfbaf647070fe1cac3940292bd0089e334da309989129df0f6577fcfdbda58e0d15a10a8d43a436b

memory/2252-18-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/8-20-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/8-19-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/8-21-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/8-24-0x0000000074E70000-0x0000000075421000-memory.dmp

memory/8-25-0x0000000074E70000-0x0000000075421000-memory.dmp