stealc | aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee

General

Target

aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe
Size

5.0MB
MD5

464c49f07bc577dcb3aea7428c6ec9f8
SHA1

53fe9ff9e7d75c3ad142ab0acb3b1cb5e04dd19c
SHA256

aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee
SHA512

c902501a9c9f2ad6f8a952bede844462145cbc41cd55e963d1244fe40c1584838608218023ddd11ebd96a3dada452ef73346beafef7a0acdbc73dbf5b544e8dd
SSDEEP

24576:SwkHo0+IDRs75ToxmN9n7qdwLct0vtJ32lWhIVxA/SxuOsUQEmjAIaeNNrI08YvX:VOIbnu22ktkl1vAq4jBvSKEBUxVTO

Score

10^/10

stealc stok discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

stok

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__	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.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	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.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
2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2632	2512	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	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.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	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe
2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2632	2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe	32
PID 2512 wrote to memory of 2632	2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe	32
PID 2512 wrote to memory of 2632	2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe	32
PID 2512 wrote to memory of 2632	2512	aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe	32

C:\Users\Admin\AppData\Local\Temp\aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.exe
"C:\Users\Admin\AppData\Local\Temp\aa97ab933ea20860f8fbddc2f18ba1d28031498b185147d71f18bb68c649baee.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:2512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2512 -s 936
  2⤵
  - Program crash
  PID:2632

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/2512-0-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-1-0x0000000077000000-0x0000000077002000-memory.dmp

Filesize
8KB

Download
memory/2512-2-0x0000000001031000-0x000000000127A000-memory.dmp

Filesize
2.3MB

Download
memory/2512-3-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-4-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-5-0x0000000001031000-0x000000000127A000-memory.dmp

Filesize
2.3MB

Download
memory/2512-6-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-7-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-8-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-9-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-10-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-11-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-12-0x0000000001030000-0x000000000152C000-memory.dmp

Filesize
5.0MB

Download
memory/2512-13-0x0000000001031000-0x000000000127A000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads