stealc | b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26

Analysis

max time kernel
94s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2025, 07:55

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General

Target

b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe
Size

5.0MB
MD5

c0628720a50269e551a2d5ae55ab558b
SHA1

a56cbafdab74385d917a70ff82d0e2f0923bf78f
SHA256

b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26
SHA512

67898f886aa03d2a5852696477db606e9c2d17fb8ff121b4481f73f95b28885269f305974fa237f777e80e2d6ddd8cf254f6f838adc2baf7c363fb81cd9ba5cc
SSDEEP

49152:RLImNoTxmPfJmD3X+4mNbdo1ZZU38tY1uHzm:9IqolmPfJmDH+4mNRo1Zg1o

Score

10^/10

stealc stok defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

stok

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__	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.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	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Wine	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4952	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe

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	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4952	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe
4952	b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe

C:\Users\Admin\AppData\Local\Temp\b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.exe
"C:\Users\Admin\AppData\Local\Temp\b677cf42388939a0d9cbe0d2d832708eff4b2855f98fa584d879884c52c51a26.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
- Suspicious behavior: EnumeratesProcesses
PID:4952

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

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Downloads

memory/4952-0-0x0000000000130000-0x000000000062F000-memory.dmp

Filesize
5.0MB

Download
memory/4952-1-0x0000000077664000-0x0000000077666000-memory.dmp

Filesize
8KB

Download
memory/4952-2-0x0000000000131000-0x000000000037A000-memory.dmp

Filesize
2.3MB

Download
memory/4952-6-0x0000000000131000-0x000000000037A000-memory.dmp

Filesize
2.3MB

Download
memory/4952-5-0x0000000000130000-0x000000000062F000-memory.dmp

Filesize
5.0MB

Download
memory/4952-4-0x0000000000130000-0x000000000062F000-memory.dmp

Filesize
5.0MB

Download