stealc | 43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014

General

Target

43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
Size

1.7MB
MD5

51c8e7467bbd99c75e6d53ef5b449d0d
SHA1

2970c79cc83f27dfae80b1ca281dc32f5d873ed5
SHA256

43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014
SHA512

06fc25b834326d0d61499cd507bcf2f8746236526f3f88b037074d317b21c7a1f1eb40e60cc74f92a5e4a9c02dcd4f43d3cfa57c272c39afec343244e7fdb49a
SSDEEP

49152:obRzGeaDnK1QpB8TtXgf8VSayE6I5ER5+E4zAw9:obRzVaDOs228oay+08vUw9

Score

10^/10

stealc brat discovery evasion 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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.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	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Wine	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.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
1356	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1864	1356	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	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.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	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1356	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
1356	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
1356	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
1356	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe

C:\Users\Admin\AppData\Local\Temp\43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
"C:\Users\Admin\AppData\Local\Temp\43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.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:1356
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1356 -s 1480
  2⤵
  - Program crash
  PID:1864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1356 -ip 1356
1⤵
PID:3576

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/1356-0-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-1-0x0000000077254000-0x0000000077256000-memory.dmp

Filesize
8KB

Download
memory/1356-2-0x0000000000F31000-0x0000000000F48000-memory.dmp

Filesize
92KB

Download
memory/1356-3-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-4-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-5-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-6-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-7-0x0000000000F30000-0x00000000015C8000-memory.dmp

Filesize
6.6MB

Download
memory/1356-8-0x0000000000F30000-0x00000000015C8000-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