stealc | 4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9

General

Target

4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
Size

1.7MB
MD5

edca42a9f74cae55140da663565621ba
SHA1

2c8766c239190ce64d9604b4cb818c4dcad82825
SHA256

4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9
SHA512

e6bb95cf1fdc0abb89b2ac9d8016d1b2ab5f2fd3fa5ffdb230b94055bd6c7ae25af4329670c90de5112f9cdf9bf22638a7681963472b2e9dd56c675a758cc0ae
SSDEEP

24576:O+iHPqaXVzwayibhgqHsamc/DcUAK4na0rAqlORhqbvcT9MnLMtmjSiph:R+PqaFyibBMaDcUIa0LoiYT9MLr

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__	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.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	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.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-1-5-21-2437139445-1151884604-3026847218-1000\Software\Wine	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.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
4928	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4480	4928	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	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.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	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4928	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
4928	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
4928	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
4928	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

C:\Users\Admin\AppData\Local\Temp\4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
"C:\Users\Admin\AppData\Local\Temp\4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.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:4928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4928 -s 1488
  2⤵
  - Program crash
  PID:4480

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4928 -ip 4928
1⤵
PID:4456

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4928-0-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-1-0x0000000077074000-0x0000000077076000-memory.dmp

Filesize
8KB

Download
memory/4928-2-0x0000000000051000-0x0000000000068000-memory.dmp

Filesize
92KB

Download
memory/4928-3-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-4-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-5-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-6-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-7-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download
memory/4928-8-0x0000000000050000-0x00000000006D7000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads