stealc | b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b

General

Target

b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe
Size

1.7MB
MD5

66681acae19fc0d643a161c40a25624c
SHA1

973ea10ed4399223032c0b1702a6e8a5807f7182
SHA256

b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b
SHA512

d5624f7a098f59779bebc3ab1285f3aba309d264d74db95e58d1e40907e1da4116a369b8e5be34421aec27a1fb51506a6af75b921e5eb277443ca4a7a3a6b04d
SSDEEP

49152:+W99f5J9lKBxMLABcHxjrdphMVdHlHXpt7:+of5vlK48axu/Hj

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__	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.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	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Wine	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.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
1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2928	1036	WerFault.exe	30

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	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.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	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe
1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1036 wrote to memory of 2928	1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe	32
PID 1036 wrote to memory of 2928	1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe	32
PID 1036 wrote to memory of 2928	1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe	32
PID 1036 wrote to memory of 2928	1036	b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe	32

C:\Users\Admin\AppData\Local\Temp\b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.exe
"C:\Users\Admin\AppData\Local\Temp\b7b8f38720ed6b96a5831c7842cd7f72f4211e0ee51026b035ff9ec1e5a1666b.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:1036
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1036 -s 924
  2⤵
  - Program crash
  PID:2928

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/1036-0-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-1-0x0000000077C10000-0x0000000077C12000-memory.dmp

Filesize
8KB

Download
memory/1036-2-0x00000000010F1000-0x0000000001108000-memory.dmp

Filesize
92KB

Download
memory/1036-3-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-4-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-5-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-6-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-7-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-8-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-9-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-10-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download
memory/1036-11-0x00000000010F0000-0x000000000178E000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads