stealc | 37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885c

General

Target

37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
Size

1.7MB
MD5

d80323920d4aad66303ee594982f0e50
SHA1

cfd56ba3e13efdd5771b6f604af39dbb4a8f999b
SHA256

37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885c
SHA512

57538d0e3595520df3aa1f9a9ad936f22010fcbde927dbfebefd3875d3f9b77226572cf38603dc0e948330f4cae8c50daba2ed4ebda3ec5ba54abd65d2ac2ef1
SSDEEP

49152:g8Z8ZqEL32zxEju3C3CIQWEmZrbQRuel/x:gxqYfu3bME5

Score

10^/10

stealc brat discovery evasion 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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.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	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Wine	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.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
3092	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4176	3092	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	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.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	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3092	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
3092	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
3092	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
3092	37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe

C:\Users\Admin\AppData\Local\Temp\37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.exe
"C:\Users\Admin\AppData\Local\Temp\37adea85294b4d18ac980ea67db32dfeaf986b45a545b67f081c42dd5460885cN.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:3092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3092 -s 1488
  2⤵
  - Program crash
  PID:4176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 372 -p 3092 -ip 3092
1⤵
PID:1916

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/3092-0-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-1-0x0000000077384000-0x0000000077386000-memory.dmp

Filesize
8KB

Download
memory/3092-2-0x0000000000501000-0x0000000000518000-memory.dmp

Filesize
92KB

Download
memory/3092-3-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-4-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-5-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-6-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-7-0x0000000000500000-0x0000000000B98000-memory.dmp

Filesize
6.6MB

Download
memory/3092-8-0x0000000000500000-0x0000000000B98000-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