stealc | 823b1e28ec41e073557d3b5d5c19183c8041bb307ed75a6398ff9ab9f29354d4

Analysis

max time kernel
133s
max time network
146s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250113-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
21-01-2025 20:17

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General

Target

random.exe
Size

1.7MB
MD5

c6ae9bc2dc6cc21141d3d2c5d91a90cc
SHA1

007ed00300003fb5a06b6ec75801a05e258517dc
SHA256

823b1e28ec41e073557d3b5d5c19183c8041bb307ed75a6398ff9ab9f29354d4
SHA512

4810333278122ab515a5ff422258f718cb1e72e63e168c4659bef6fb1baa11be8b874aa42f1974542048dbd9dbf9b20c9661d34ded1700d694afc0ad1d740759
SSDEEP

49152:RmE/8ijfKdw3Fz2+pkhJXbZIkHnYTC0dQJBBsBx:R1kijT3F5yXbikH8Q/m

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__	random.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\VideoBiosVersion	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	random.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-1-5-21-3463531801-1484541064-3495084620-1000\Software\Wine	random.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
2456	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2164	2456	WerFault.exe	80

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	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2456	random.exe
2456	random.exe
2456	random.exe
2456	random.exe

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:2456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2456 -s 1508
  2⤵
  - Program crash
  PID:2164

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2456 -ip 2456
1⤵
PID:3388

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/2456-0-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-1-0x00000000770C5000-0x00000000770C7000-memory.dmp

Filesize
8KB

Download
memory/2456-2-0x0000000000861000-0x0000000000878000-memory.dmp

Filesize
92KB

Download
memory/2456-3-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-4-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-5-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-6-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-7-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download
memory/2456-8-0x0000000000860000-0x0000000000EF4000-memory.dmp

Filesize
6.6MB

Download