stealc | b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453

General

Target

b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
Size

1.7MB
MD5

59bdb0d8a6bece3b1de7814721924265
SHA1

c935bce5cae63c450c8c000ddc1c8c2cb3b5893f
SHA256

b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453
SHA512

e62d6fbeab88cc9ad8794bfa7bf16272f1ab884bf8c197e0c631d7af5b50ed5198752fd7035650a8c6181505ecd17b7e5c357617fe3502a4e7327e36a07916ef
SSDEEP

49152:kNogVghbJ82p50O6oCy58cc/dgvoUJAbgN:khCe2KyqdgQqAEN

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__	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.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	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Wine	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.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
2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2544	2100	WerFault.exe	30

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	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.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	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2544	2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe	32
PID 2100 wrote to memory of 2544	2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe	32
PID 2100 wrote to memory of 2544	2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe	32
PID 2100 wrote to memory of 2544	2100	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe	32

C:\Users\Admin\AppData\Local\Temp\b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
"C:\Users\Admin\AppData\Local\Temp\b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.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:2100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 900
  2⤵
  - Program crash
  PID:2544

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2100-0-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-1-0x0000000077060000-0x0000000077062000-memory.dmp

Filesize
8KB

Download
memory/2100-2-0x0000000000961000-0x0000000000978000-memory.dmp

Filesize
92KB

Download
memory/2100-3-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-4-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-5-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-6-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-7-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-8-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-9-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-10-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download
memory/2100-11-0x0000000000960000-0x0000000000FEE000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads