stealc | 1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2

General

Target

1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe
Size

1.8MB
MD5

4758419150a877ff2dfbc6b43f49b5d6
SHA1

758d0b86c23061d17502108d89bdbf50cbdd4426
SHA256

1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2
SHA512

5b299f77c56583bf3bf5d3597cb2ad1c5386f9a900b654978b954c5ac30f1f4304a7f7ad49b259bffcc1cd6fb95aa8df0fafa5bb9521147489a08883d96130e1
SSDEEP

24576:hY3UFHcPanCkPzYftgEmL5pgmiAi2f1+sQsD54/XdBQsuWaa3wCw5Pm9ImFmxM8L:hY3UKWEmL5pghT2fJQa571rsFv76

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__	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.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	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Wine	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.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
2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2728	2684	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	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.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	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe
2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2728	2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe	31
PID 2684 wrote to memory of 2728	2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe	31
PID 2684 wrote to memory of 2728	2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe	31
PID 2684 wrote to memory of 2728	2684	1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe	31

C:\Users\Admin\AppData\Local\Temp\1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.exe
"C:\Users\Admin\AppData\Local\Temp\1134fe00c7c50760e0c9774eaa632d97e8b5a91accbee2cf730db940858729d2.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:2684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2684 -s 920
  2⤵
  - Program crash
  PID:2728

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/2684-0-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-1-0x0000000077920000-0x0000000077922000-memory.dmp

Filesize
8KB

Download
memory/2684-2-0x0000000000191000-0x00000000001A8000-memory.dmp

Filesize
92KB

Download
memory/2684-3-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-4-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-5-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-6-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-7-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-8-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-9-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-10-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download
memory/2684-11-0x0000000000190000-0x0000000000842000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads