stealc | 407c7e945453f8b416b70eb3cab6e575833ea8082edf6f38b6f91325fa756a8f

General

Target
file.exe
Size 1.7MB
Sample240908-ldly2axgrj
SHA256 407c7e945453f8b416b70eb3cab6e575833ea8082edf6f38b6f91325fa756a8f
MD5 13a7ce03877b76aeae5920065b34a7ec
SHA1 ead077227858fb9404d1857d25567849b9e77c92
SHA512 fdf6c139a89a9c988fea0620a81718dca1a64bd3ae07fb4bc097b0ccb3f3ebee057a82f72922b66937f031ff29a5ac08e2aad32d4c1cdd099426bb52090243bf
SSDEEP 49152:NRB3UgNCnW0CZ3KcYveQEgRuIo6/iTDi/2nuVViWQtp:xU2Z3KcYjHRuTHiYehQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc rave discovery evasion spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

rave

C2

http://185.215.113.103

Attributes

url_path
/e2b1563c6670f193.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer 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__	file.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	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	file.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Wine	file.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
3056	file.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2628	3056	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	file.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	file.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	file.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3056	file.exe
3056	file.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2628	3056	file.exe	32
PID 3056 wrote to memory of 2628	3056	file.exe	32
PID 3056 wrote to memory of 2628	3056	file.exe	32
PID 3056 wrote to memory of 2628	3056	file.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.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:3056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3056 -s 928
  2⤵
  - Program crash
  PID:2628