stealc | 6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7

General

Target

6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe
Size

1.7MB
MD5

ead09a627546993696917dcc306f94dd
SHA1

e38409912bf89fd7ee9333c09ba3a0f7182330de
SHA256

6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7
SHA512

f79caec3477b12d50b32763fede06f6fd009ba167d983ce9910eac4a3169fc6bb75fcca557e9ff257bb82a25c9210c01fcb353292b67475a8b8e9ab998dc7ddb
SSDEEP

24576:1m5ueNxX6u71S8MFT0FR29BY5C5c2F4ZCllm2Nco1OqRiIeqKjkiiH4IP:ktRxSXm0Bbu2FLLOqPKl44

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__	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.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	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Wine	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.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
1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2904	1552	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	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.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	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe
1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 2904	1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe	31
PID 1552 wrote to memory of 2904	1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe	31
PID 1552 wrote to memory of 2904	1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe	31
PID 1552 wrote to memory of 2904	1552	6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe	31

C:\Users\Admin\AppData\Local\Temp\6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.exe
"C:\Users\Admin\AppData\Local\Temp\6444a93b36a157483348af81c8e1f6ba5b07fc18066da778911b67cf03fe76f7.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:1552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1552 -s 924
  2⤵
  - Program crash
  PID:2904

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/1552-0-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-1-0x00000000778F0000-0x00000000778F2000-memory.dmp

Filesize
8KB

Download
memory/1552-2-0x0000000001111000-0x0000000001128000-memory.dmp

Filesize
92KB

Download
memory/1552-3-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-4-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-5-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-6-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-7-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-8-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-9-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-10-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download
memory/1552-11-0x0000000001110000-0x000000000179A000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads