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-1-5-21-2878641211-696417878-3864914810-1000\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
1248	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2272	1248	WerFault.exe	82

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 4 IoCs

pid	Process
1248	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
1248	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
1248	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe
1248	8b1591b926af4edbb57608de518b14d16d053d47373bece383de1b7c4b5196db.exe

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
PID:1248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1248 -s 1432
  2⤵
  - Program crash
  PID:2272

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1248 -ip 1248
1⤵
PID:3044

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/1248-0-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-1-0x00000000771E4000-0x00000000771E6000-memory.dmp

Filesize
8KB

Download
memory/1248-2-0x0000000000281000-0x0000000000298000-memory.dmp

Filesize
92KB

Download
memory/1248-3-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-4-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-5-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-6-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-7-0x0000000000280000-0x0000000000921000-memory.dmp

Filesize
6.6MB

Download
memory/1248-8-0x0000000000280000-0x0000000000921000-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