Malware Analysis Report

2024-10-24 18:41

Sample ID 240920-b2tcxasglr
Target b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe
SHA256 b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5
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

b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5

Threat Level: Known bad

The file b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-20 01:38

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-20 01:38

Reported

2024-09-20 01:41

Platform

win7-20240708-en

Max time kernel

16s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe

"C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe"

Network

Country Destination Domain Proto
RU 185.215.113.103:80 185.215.113.103 tcp

Files

memory/2412-0-0x00000000001E0000-0x00000000006C2000-memory.dmp

memory/2412-1-0x0000000077B00000-0x0000000077B02000-memory.dmp

memory/2412-3-0x00000000001E0000-0x00000000006C2000-memory.dmp

memory/2412-2-0x00000000001E1000-0x00000000001F5000-memory.dmp

memory/2412-4-0x00000000001E0000-0x00000000006C2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-20 01:38

Reported

2024-09-20 01:41

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.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\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe

"C:\Users\Admin\AppData\Local\Temp\b7f3a24f27cbb728ce871f1437eac40ce4dcb77c3357687b92b8b8248b81d6e5.exe"

Network

Country Destination Domain Proto
RU 185.215.113.103:80 185.215.113.103 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/440-0-0x00000000000A0000-0x0000000000582000-memory.dmp

memory/440-1-0x0000000076F94000-0x0000000076F96000-memory.dmp

memory/440-2-0x00000000000A1000-0x00000000000B5000-memory.dmp

memory/440-3-0x00000000000A0000-0x0000000000582000-memory.dmp

memory/440-5-0x00000000000A0000-0x0000000000582000-memory.dmp