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-1-5-21-3692679935-4019334568-335155002-1000\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
1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1456	1764	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	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 2 IoCs

pid	Process
1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe
1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 1456	1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe	32
PID 1764 wrote to memory of 1456	1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe	32
PID 1764 wrote to memory of 1456	1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe	32
PID 1764 wrote to memory of 1456	1764	43caf1416ec29c2c736bcfe9220bef15e2970dd4330bc4171cb71ba381300014.exe	32

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
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1764 -s 436
  2⤵
  - Program crash
  PID:1456

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/1764-0-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-1-0x0000000077470000-0x0000000077472000-memory.dmp

Filesize
8KB

Download
memory/1764-2-0x0000000000011000-0x0000000000028000-memory.dmp

Filesize
92KB

Download
memory/1764-3-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-4-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-5-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-6-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-7-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-8-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-9-0x0000000000010000-0x00000000006A8000-memory.dmp

Filesize
6.6MB

Download
memory/1764-11-0x0000000000010000-0x00000000006A8000-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