Malware Analysis Report

2024-10-24 18:41

Sample ID 240920-bykatssenl
Target 98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe
SHA256 98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c
Tags
stealc rave discovery evasion 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

98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c

Threat Level: Known bad

The file 98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe was found to be: Known bad.

Malicious Activity Summary

stealc rave discovery evasion stealer

Stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Checks BIOS information in registry

Identifies Wine through registry keys

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-20 01:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-20 01:33

Reported

2024-09-20 01:35

Platform

win7-20240903-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe"

Signatures

Stealc

stealer stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

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\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe

"C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe"

Network

Country Destination Domain Proto
RU 185.215.113.103:80 185.215.113.103 tcp

Files

memory/2248-0-0x0000000000B40000-0x0000000001025000-memory.dmp

memory/2248-1-0x0000000077650000-0x0000000077652000-memory.dmp

memory/2248-2-0x0000000000B41000-0x0000000000B55000-memory.dmp

memory/2248-3-0x0000000000B40000-0x0000000001025000-memory.dmp

memory/2248-4-0x0000000000B40000-0x0000000001025000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-20 01:33

Reported

2024-09-20 01:35

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe"

Signatures

Stealc

stealer stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

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\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe

"C:\Users\Admin\AppData\Local\Temp\98a90eeaa63f5b8b95135a0d5a1b4c9641f10e691d9cd48031af25c016ab041c.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
RU 185.215.113.103:80 185.215.113.103 tcp
US 8.8.8.8:53 103.113.215.185.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.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 42.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

memory/3700-0-0x0000000000340000-0x0000000000825000-memory.dmp

memory/3700-1-0x0000000077854000-0x0000000077856000-memory.dmp

memory/3700-2-0x0000000000341000-0x0000000000355000-memory.dmp

memory/3700-3-0x0000000000340000-0x0000000000825000-memory.dmp

memory/3700-4-0x0000000000340000-0x0000000000825000-memory.dmp