stealc | d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad

General

Target

d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
Size

1.8MB
MD5

3210aec921145bb5c1f3ba8638c8249f
SHA1

95766c36e6f9d228db3c4b9c207bbb02eafb49a8
SHA256

d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad
SHA512

f61cc3fe0c8863820154086f95781d6bdec190db4652bdbe6093392a9fcf384c37a4e952039c4f07418f6f56e0a3027960acf013b247cbaa9a8399d2a0c2fc86
SSDEEP

49152:4Kk2PuBHnahD5mans0GluT55SHQqVLrG4rY8U6a7+xq:Tk2Pcutwli5AHQOLrG4cxb+

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__	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.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	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.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-1-5-21-940901362-3608833189-1915618603-1000\Software\Wine	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.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
4460	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3684	4460	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	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.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	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4460	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
4460	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
4460	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
4460	d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe

C:\Users\Admin\AppData\Local\Temp\d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.exe
"C:\Users\Admin\AppData\Local\Temp\d521017e193d9865d6725b641bff525f8eec31a9fd0f2d8a14eca043078542ad.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:4460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 1440
  2⤵
  - Program crash
  PID:3684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4460 -ip 4460
1⤵
PID:4824

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/4460-0-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-1-0x0000000077B74000-0x0000000077B76000-memory.dmp

Filesize
8KB

Download
memory/4460-2-0x0000000000501000-0x0000000000518000-memory.dmp

Filesize
92KB

Download
memory/4460-3-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-4-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-5-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-6-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-7-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download
memory/4460-8-0x0000000000500000-0x0000000000BAF000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads