stealc | 573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d

General

Target

573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
Size

1.7MB
MD5

40399761773e9f8ccc6cd5acb5989a8e
SHA1

b303e638c514e49ae097b41ffcd3799a92f31e6f
SHA256

573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d
SHA512

5940b2ba6603bf9c1a39e56cc3107ddaa8c24e0d72babe4d4d47bcd91a9213d777a85bb2f0c60b04b249846fdeeb59e27c49e7f31d3a1fab96f00d702b115885
SSDEEP

49152:c4rF3J0SdMVWx6u7I+NLLgYFwUDE6nSE:9JMc7HgYF7RS

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__	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.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\VideoBiosVersion	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.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-1-5-21-3442511616-637977696-3186306149-1000\Software\Wine	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.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
3888	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3932	3888	WerFault.exe	81

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	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.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	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3888	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
3888	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
3888	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
3888	573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe

C:\Users\Admin\AppData\Local\Temp\573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.exe
"C:\Users\Admin\AppData\Local\Temp\573fc7284a73ec6c0e91b3345398f4fd3e95cf844478e1a7e5108be9b830649d.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:3888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3888 -s 1472
  2⤵
  - Program crash
  PID:3932

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3888 -ip 3888
1⤵
PID:4384

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/3888-0-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-1-0x0000000077764000-0x0000000077766000-memory.dmp

Filesize
8KB

Download
memory/3888-2-0x0000000000DA1000-0x0000000000DB8000-memory.dmp

Filesize
92KB

Download
memory/3888-3-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-4-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-5-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-6-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-7-0x0000000000DA0000-0x0000000001437000-memory.dmp

Filesize
6.6MB

Download
memory/3888-8-0x0000000000DA0000-0x0000000001437000-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