stealc | 5ffbfc038a1ab3b850f1afd6b5283501875bb98ee5f9541ed6edf706d2891f6f

Analysis

max time kernel
95s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2025, 13:51

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General

Target

random.exe
Size

1.7MB
MD5

7fa381cd8c80e6930f9ead27ab8d65d5
SHA1

9478be51941ba8077be76c75a6180e5468ba90aa
SHA256

5ffbfc038a1ab3b850f1afd6b5283501875bb98ee5f9541ed6edf706d2891f6f
SHA512

60c9d72fe393d846015585ab078c33211e1755071ea465a645ee2e80b48a392258f3b492161e92685e26f82c3848c2c1097a280b3fb0edcd5d78b4e4db30b523
SSDEEP

49152:aG2fPSWTmRNDe5VobzkU+v5OLY0GgP+H7OvR6O:92XSWTX5VoEUI5Ok0xO65

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

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-1-5-21-4050598569-1597076380-177084960-1000\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
2428	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
856	2428	WerFault.exe	81

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	random.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2428	random.exe
2428	random.exe
2428	random.exe
2428	random.exe

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
PID:2428
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2428 -s 1488
  2⤵
  - Program crash
  PID:856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2428 -ip 2428
1⤵
PID:3968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2428-0-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-1-0x00000000772D4000-0x00000000772D6000-memory.dmp

Filesize
8KB

Download
memory/2428-2-0x0000000000671000-0x0000000000688000-memory.dmp

Filesize
92KB

Download
memory/2428-3-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-4-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-5-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-6-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-7-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download
memory/2428-8-0x0000000000670000-0x0000000000CF8000-memory.dmp

Filesize
6.5MB

Download