stealc | 823b1e28ec41e073557d3b5d5c19183c8041bb307ed75a6398ff9ab9f29354d4

General

Target

random.exe
Size

1.7MB
MD5

c6ae9bc2dc6cc21141d3d2c5d91a90cc
SHA1

007ed00300003fb5a06b6ec75801a05e258517dc
SHA256

823b1e28ec41e073557d3b5d5c19183c8041bb307ed75a6398ff9ab9f29354d4
SHA512

4810333278122ab515a5ff422258f718cb1e72e63e168c4659bef6fb1baa11be8b874aa42f1974542048dbd9dbf9b20c9661d34ded1700d694afc0ad1d740759
SSDEEP

49152:RmE/8ijfKdw3Fz2+pkhJXbZIkHnYTC0dQJBBsBx:R1kijT3F5yXbikH8Q/m

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__	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	random.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
2548	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1776	2548	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	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2548	random.exe
2548	random.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 1776	2548	random.exe	32
PID 2548 wrote to memory of 1776	2548	random.exe	32
PID 2548 wrote to memory of 1776	2548	random.exe	32
PID 2548 wrote to memory of 1776	2548	random.exe	32

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:2548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 916
  2⤵
  - Program crash
  PID:1776

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/2548-0-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-1-0x0000000077BC0000-0x0000000077BC2000-memory.dmp

Filesize
8KB

Download
memory/2548-2-0x0000000000221000-0x0000000000238000-memory.dmp

Filesize
92KB

Download
memory/2548-3-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-4-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-5-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-6-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-7-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-8-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-9-0x0000000000220000-0x00000000008B4000-memory.dmp

Filesize
6.6MB

Download
memory/2548-10-0x0000000000220000-0x00000000008B4000-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