stealc | a7f8b342432721e07f208f8d793f5a248e15c22cba255ef6b22f1b572a11b759

Analysis

max time kernel
96s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 11:45

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General

Target

83a46515e437539d5d00a1ed4d361f3a.exe
Size

5.0MB
MD5

83a46515e437539d5d00a1ed4d361f3a
SHA1

ce89f1c3e1c3e069020db65ae35b5b1c6b4b3d15
SHA256

a7f8b342432721e07f208f8d793f5a248e15c22cba255ef6b22f1b572a11b759
SHA512

3a52653fcdc707572be2405294fc51b46ce15501f6edeeb5af4e845f67551834f0d4b0d8b82e687b5d8d9b5410b5bc4a200d27ee4c936a6db3a167b29a43d9cb
SSDEEP

49152:a5s9bIAUGBCBSP9A7MlYReqYWwDZZorzh67u7DrFP9dO:aqbOGBCcVAglieRZZIzVHrFP

Score

10^/10

stealc stok discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

stok

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__	83a46515e437539d5d00a1ed4d361f3a.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	83a46515e437539d5d00a1ed4d361f3a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	83a46515e437539d5d00a1ed4d361f3a.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-1-5-21-493223053-2004649691-1575712786-1000\Software\Wine	83a46515e437539d5d00a1ed4d361f3a.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
1504	83a46515e437539d5d00a1ed4d361f3a.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1916	1504	WerFault.exe	82

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	83a46515e437539d5d00a1ed4d361f3a.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	83a46515e437539d5d00a1ed4d361f3a.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	83a46515e437539d5d00a1ed4d361f3a.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1504	83a46515e437539d5d00a1ed4d361f3a.exe
1504	83a46515e437539d5d00a1ed4d361f3a.exe
1504	83a46515e437539d5d00a1ed4d361f3a.exe
1504	83a46515e437539d5d00a1ed4d361f3a.exe

C:\Users\Admin\AppData\Local\Temp\83a46515e437539d5d00a1ed4d361f3a.exe
"C:\Users\Admin\AppData\Local\Temp\83a46515e437539d5d00a1ed4d361f3a.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:1504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1504 -s 1504
  2⤵
  - Program crash
  PID:1916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1504 -ip 1504
1⤵
PID:4344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1504-0-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-1-0x0000000077064000-0x0000000077066000-memory.dmp

Filesize
8KB

Download
memory/1504-2-0x0000000000D71000-0x0000000000FBA000-memory.dmp

Filesize
2.3MB

Download
memory/1504-3-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-4-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-5-0x0000000000D71000-0x0000000000FBA000-memory.dmp

Filesize
2.3MB

Download
memory/1504-6-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-7-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-8-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-9-0x0000000000D70000-0x0000000001274000-memory.dmp

Filesize
5.0MB

Download
memory/1504-10-0x0000000000D71000-0x0000000000FBA000-memory.dmp

Filesize
2.3MB

Download