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-1-5-21-2437139445-1151884604-3026847218-1000\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
4524	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
704	4524	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	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 4 IoCs

pid	Process
4524	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
4524	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
4524	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe
4524	b9da18806bef7f38fabe635b32becc938c2b73a9c227c2a476ba137dbc782453.exe

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
PID:4524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4524 -s 1468
  2⤵
  - Program crash
  PID:704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4524 -ip 4524
1⤵
PID:1060

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/4524-0-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-1-0x0000000077694000-0x0000000077696000-memory.dmp

Filesize
8KB

Download
memory/4524-2-0x00000000001F1000-0x0000000000208000-memory.dmp

Filesize
92KB

Download
memory/4524-3-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-4-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-5-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-6-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-7-0x00000000001F0000-0x000000000087E000-memory.dmp

Filesize
6.6MB

Download
memory/4524-8-0x00000000001F0000-0x000000000087E000-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