stealc | 8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db

General

Target

8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
Size

1.7MB
MD5

d53881e8f99ad2693fa389a1cb0ae0d3
SHA1

003e0fd01c5183c6df3682428ae9ceba3a5f4caa
SHA256

8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db
SHA512

995097261228211aaf99ff8ab5d04f41726d35f684f518e3ccb82dad849b7b4360c2985a5497b9856c3efdbe9a8098d006967f2a7ccdd7d7127caf13ebf0e45d
SSDEEP

49152:05+9zXrXMdnN5ovjJ0Pw67vP2EJYTpMzDWQWF5ER:05UzXrXMdnNy0Pw8X3Y1vQ5

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

C2

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__	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.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	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.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
1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2676	1584	WerFault.exe	29

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	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.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	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 2676	1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe	32
PID 1584 wrote to memory of 2676	1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe	32
PID 1584 wrote to memory of 2676	1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe	32
PID 1584 wrote to memory of 2676	1584	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe	32

C:\Users\Admin\AppData\Local\Temp\8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
"C:\Users\Admin\AppData\Local\Temp\8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.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
- Suspicious use of WriteProcessMemory
PID:1584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1584 -s 920
  2⤵
  - Program crash
  PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1584-0-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-1-0x0000000077270000-0x0000000077272000-memory.dmp

Filesize
8KB

Download
memory/1584-2-0x00000000011F1000-0x0000000001208000-memory.dmp

Filesize
92KB

Download
memory/1584-3-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-4-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-5-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-6-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-7-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-8-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-9-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-10-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download
memory/1584-11-0x00000000011F0000-0x0000000001891000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads