stealc | 4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5

General

Target

4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe
Size

1.7MB
MD5

732ea5b4fdc481040c7e83c7fbf23540
SHA1

2538c086ed314c3b0b723e1b6a4e2aecf7b9ac3f
SHA256

4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5
SHA512

34b9c38d98390392c9d4323fc4893f2ede478291bc779db093e9a94ff77e393765a72dcd18307754a0ad71ed898c1e9a5d599266967845b127a8d9cb5dccb10f
SSDEEP

24576:qTCCRtkw3V8RVhX0f3XfKcZpjXOshH8J9Aknz6+VGuM+Zr+Z68bLwQS+2K7v5/NG:qfRKfRVGxXzH6Hz6OGHKr+8MLwMv9NG

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__	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.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	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.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
2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1724	2268	WerFault.exe	28

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	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.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	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe
2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 1724	2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe	30
PID 2268 wrote to memory of 1724	2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe	30
PID 2268 wrote to memory of 1724	2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe	30
PID 2268 wrote to memory of 1724	2268	4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe	30

C:\Users\Admin\AppData\Local\Temp\4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.exe
"C:\Users\Admin\AppData\Local\Temp\4a15517d5ddb8f945585fe96a12ab2fae619b8a7d5b0f1dae8c4984f6475cac5.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:2268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 436
  2⤵
  - Program crash
  PID:1724

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/2268-0-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-1-0x0000000077D00000-0x0000000077D02000-memory.dmp

Filesize
8KB

Download
memory/2268-2-0x0000000000091000-0x00000000000A8000-memory.dmp

Filesize
92KB

Download
memory/2268-3-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-4-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-5-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-6-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-7-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-8-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-9-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-10-0x0000000000090000-0x000000000071D000-memory.dmp

Filesize
6.6MB

Download
memory/2268-11-0x0000000000090000-0x000000000071D000-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