Malware Analysis Report

2025-03-15 06:40

Sample ID 250112-rakjpavmez
Target idk.exe
SHA256 ce59e3370985a4b7f243de0fb67848bcb223781077dee528e2f4adb8e9d8d656
Tags
orcus discovery rat 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

ce59e3370985a4b7f243de0fb67848bcb223781077dee528e2f4adb8e9d8d656

Threat Level: Known bad

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

Malicious Activity Summary

orcus discovery rat 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 SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-12 13:59

Signatures

Orcus family

orcus

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-12 13:59

Reported

2025-01-12 14:02

Platform

win10ltsc2021-20241211-en

Max time kernel

117s

Max time network

150s

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-1-5-21-1006597246-3150276181-3318461161-1000\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 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

Drops file in Windows directory

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
File opened for modification C:\Windows\assembly 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\Roaming\Microsoft\Speech\AudioDriver.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\idk.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 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 86.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 6.tcp.eu.ngrok.io udp
DE 3.69.157.220:19196 6.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 220.157.69.3.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.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 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/1552-0-0x0000000075402000-0x0000000075403000-memory.dmp

memory/1552-1-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1552-2-0x0000000075400000-0x00000000759B1000-memory.dmp

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

MD5 c0f4b33fab9864dfebccb1f7621ac76a
SHA1 9e65684a22bae25570f019366657a83522434590
SHA256 ce59e3370985a4b7f243de0fb67848bcb223781077dee528e2f4adb8e9d8d656
SHA512 6cd5672e2b3615ebb94fb96de29fe1b2cbfa81c1e18080ad6fbb48b25457481e17d8919823970e5bd1e230e2e8c76d379a515551e35bdc10f305d3349ab3cefe

memory/1552-7-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-9-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-8-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-10-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-11-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-14-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-15-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-16-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/1228-17-0x0000000075400000-0x00000000759B1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-12 13:59

Reported

2025-01-12 14:02

Platform

win11-20241007-en

Max time kernel

147s

Max time network

151s

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

Drops file in Windows directory

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
File opened for modification C:\Windows\assembly 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 3.66.38.117:19196 6.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 117.38.66.3.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/2792-0-0x0000000074FA1000-0x0000000074FA2000-memory.dmp

memory/2792-1-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/2792-2-0x0000000074FA0000-0x0000000075551000-memory.dmp

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

MD5 c0f4b33fab9864dfebccb1f7621ac76a
SHA1 9e65684a22bae25570f019366657a83522434590
SHA256 ce59e3370985a4b7f243de0fb67848bcb223781077dee528e2f4adb8e9d8d656
SHA512 6cd5672e2b3615ebb94fb96de29fe1b2cbfa81c1e18080ad6fbb48b25457481e17d8919823970e5bd1e230e2e8c76d379a515551e35bdc10f305d3349ab3cefe

memory/2792-20-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-21-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-19-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-18-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-22-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-25-0x0000000074FA0000-0x0000000075551000-memory.dmp

memory/3828-26-0x0000000074FA0000-0x0000000075551000-memory.dmp