stealc | 3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593

General

Target

3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe
Size

1.7MB
MD5

43ed51fc8168018abc0cb9c2b9d3bd47
SHA1

373989fd4b669d1ac6ffe20480b904bd3cb4d72e
SHA256

3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593
SHA512

caf21bba0745c8fda4e0e247bb6130cf0629505bf491cb22864fd918b876faf92202958ee19d21399ba7d673968afee7bd52c70f30d7ac27aef83a1cb85863eb
SSDEEP

24576:bMHl+xo+4lXqcT02lzscVnvgrYp3ncm4EfpTIyaYxzJ6yKtT//Ku2+9kCxc:wF+xos2lzLbx9pTIyaW9655W+9Jx

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__	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.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	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Wine	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.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
1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2784	1656	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	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.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	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe
1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 2784	1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe	31
PID 1656 wrote to memory of 2784	1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe	31
PID 1656 wrote to memory of 2784	1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe	31
PID 1656 wrote to memory of 2784	1656	3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe	31

C:\Users\Admin\AppData\Local\Temp\3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.exe
"C:\Users\Admin\AppData\Local\Temp\3b9bc6e05ee62378e410da9f5a418f4fae488a373f43346e8e15bd13f500e593.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:1656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 896
  2⤵
  - Program crash
  PID:2784

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/1656-0-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-1-0x0000000077D20000-0x0000000077D22000-memory.dmp

Filesize
8KB

Download
memory/1656-2-0x0000000000BD1000-0x0000000000BE8000-memory.dmp

Filesize
92KB

Download
memory/1656-3-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-4-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-5-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-6-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-7-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-8-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-9-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-10-0x0000000000BD0000-0x0000000001250000-memory.dmp

Filesize
6.5MB

Download
memory/1656-11-0x0000000000BD0000-0x0000000001250000-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