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-1-5-21-3533259084-2542256011-65585152-1000\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
1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2688	1988	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	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe
1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2688	1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe	32
PID 1988 wrote to memory of 2688	1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe	32
PID 1988 wrote to memory of 2688	1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe	32
PID 1988 wrote to memory of 2688	1988	4f2c5552fc7799fe28d5cc6712d4c5b5e4723f9f00204a389299aac6643119b9.exe	32

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
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1988 -s 924
  2⤵
  - Program crash
  PID:2688

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/1988-0-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-1-0x0000000077500000-0x0000000077502000-memory.dmp

Filesize
8KB

Download
memory/1988-2-0x0000000000D81000-0x0000000000D98000-memory.dmp

Filesize
92KB

Download
memory/1988-3-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-4-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-5-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-6-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-7-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-8-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-9-0x0000000000D80000-0x0000000001407000-memory.dmp

Filesize
6.5MB

Download
memory/1988-10-0x0000000000D80000-0x0000000001407000-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