stealc | aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-11-2024 07:49

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General

Target

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe
Size

1.7MB
MD5

4b5b6c5e22eb5b54fe868146f3eb135a
SHA1

4befd8d3f3344123701518370be0b471cc9c359f
SHA256

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b
SHA512

bd49c85cac7c34568fdb3fa4eb980c11170bbdbc274d04b695f3e88d37bea4058f1979bd5f3f2b594f3446e5a5a53ba3da97b83523b842fa6018bccca22aa1ca
SSDEEP

49152:nsDtZHIZZZZ1Jrv/7l1eOb1OCJW5TFrMgs2dpHJOH:nn37711rgt7wH

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:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.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:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.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:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Wine	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

pid process

2500 aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

pid	process
2500	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.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:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

pid process

2500 aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

pid	process
2500	aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe

C:\Users\Admin\AppData\Local\Temp\aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.exe
"C:\Users\Admin\AppData\Local\Temp\aef9bf494cc14ae02f71a0d63807fa488f72cc91b9d8c28edcc28c13a43ae55b.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:2500

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/2500-0-0x0000000000870000-0x0000000000F02000-memory.dmp

Filesize
6.6MB

Download
memory/2500-1-0x00000000775B0000-0x00000000775B2000-memory.dmp

Filesize
8KB

Download
memory/2500-3-0x0000000000870000-0x0000000000F02000-memory.dmp

Filesize
6.6MB

Download
memory/2500-2-0x0000000000871000-0x0000000000888000-memory.dmp

Filesize
92KB

Download
memory/2500-4-0x0000000000870000-0x0000000000F02000-memory.dmp

Filesize
6.6MB

Download