stealc | 872c643e80d78523297c4670a7c081bf524de755787ca042dd93b4db9d77db18

Analysis

max time kernel
149s
max time network
278s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-01-2025 21:38

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General

Target

sample.exe
Size

1.8MB
MD5

24f5d47762308c43e34ad9f93a4c3811
SHA1

1756b29d4dc4fba7d0d19347cf6cf549f250e375
SHA256

872c643e80d78523297c4670a7c081bf524de755787ca042dd93b4db9d77db18
SHA512

de8016609c78890af57349dcf58f5c71758f20664bdcc5f789b1d992df9924e48832324950210c44d6d9485fc1f92f99ada2d53aa5cd6386c4e9ef7053543844
SSDEEP

24576:hUOWUMzMMgW1MWsuYl3MDLmYW9Kz4aDwnxruPHHk9EUxjCgAjH9aHfM2OuM3WQRa:hUfUmfgWTYl2xWs8vuPnkNxrIm3SBjN

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

http://185.215.113.206

Attributes

url_path
/c4becf79229cb002.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	sample.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	sample.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	sample.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Wine	sample.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4808	sample.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3340	4808	WerFault.exe	81

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	sample.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	sample.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4808	sample.exe
4808	sample.exe
4808	sample.exe
4808	sample.exe

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- 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
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 1480
  2⤵
  - Program crash
  PID:3340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4808 -ip 4808
1⤵
PID:1448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4808-0-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-1-0x0000000077DD4000-0x0000000077DD6000-memory.dmp

Filesize
8KB

Download
memory/4808-2-0x0000000000351000-0x0000000000368000-memory.dmp

Filesize
92KB

Download
memory/4808-3-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-4-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-5-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-6-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-7-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download
memory/4808-8-0x0000000000350000-0x0000000000A13000-memory.dmp

Filesize
6.8MB

Download