stealc | 8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
21-11-2024 06:47

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General

Target

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe
Size

1.7MB
MD5

af00fae5bf606001c0c6ef0b98fb54d0
SHA1

a24fe73ec0b2d0190d3f6f068ca3c13a6cde4fd3
SHA256

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881
SHA512

e08d6691ed7092e2f569391ef89c6b3528630ff449372b064e06ebde2e7de482517e7407c81ce75a190d74936c64a0c31f5acc23efeffe6f54622184f780a5bc
SSDEEP

24576:fVIhhuGqyQIrSITgOIubNQb6KAnOMK0HKKEfbULhQmo1936905EnoK5RLSEzqt9v:uh8IrZhrO2KAnOMg5fbULhQmo19Cnqb

Score

10^/10

stealc mars discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

mars

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.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

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

pid	Process
3044	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.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

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

pid	Process
3044	8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe

C:\Users\Admin\AppData\Local\Temp\8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.exe
"C:\Users\Admin\AppData\Local\Temp\8b1fbd75e6fcdf963260148537cae0d876130656c343518a5d7623937d4f0881.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:3044

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/3044-0-0x0000000000C90000-0x0000000001325000-memory.dmp

Filesize
6.6MB

Download
memory/3044-1-0x0000000077AB0000-0x0000000077AB2000-memory.dmp

Filesize
8KB

Download
memory/3044-2-0x0000000000C91000-0x0000000000CA8000-memory.dmp

Filesize
92KB

Download
memory/3044-3-0x0000000000C90000-0x0000000001325000-memory.dmp

Filesize
6.6MB

Download
memory/3044-5-0x0000000000C90000-0x0000000001325000-memory.dmp

Filesize
6.6MB

Download