stealc | 35eab41584e126f6a9df335ebdb3bdb0f8406a91e99620f7aaea0f0e32e52314

Analysis

max time kernel
92s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
06-02-2025 23:38

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General

Target

random.exe
Size

1.7MB
MD5

a1d508cd0f560187a4eec32172b572ea
SHA1

3bfc9a9695d74c9a884ac886c363b3d4e2e04046
SHA256

35eab41584e126f6a9df335ebdb3bdb0f8406a91e99620f7aaea0f0e32e52314
SHA512

1e3da8cada023e71b58796665dde1353d7f0fed6613b9f542ec6153aae7049c0b72efb98088401264ec004d9d38ecca5d234aaf7d57c778b52cdeb14dc460dde
SSDEEP

24576:nRJRKEiFqtJPXgbD8MmELN8X8UZay0xp6yIBnB74b298WOnSbR/pD2Ekd15iwP8S:jRniiNZMmAI8bBxpcBnB05WJ3Pa1cun

Score

10^/10

stealc reno defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

reno

http://185.215.113.115

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__	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.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-1-5-21-4174397412-4125106315-2776226590-1000\Software\Wine	random.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
2640	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1980	2640	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	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2640	random.exe
2640	random.exe
2640	random.exe
2640	random.exe

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:2640
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2640 -s 1488
  2⤵
  - Program crash
  PID:1980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2640 -ip 2640
1⤵
PID:640

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/2640-0-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-1-0x0000000077BA4000-0x0000000077BA6000-memory.dmp

Filesize
8KB

Download
memory/2640-2-0x0000000000771000-0x0000000000788000-memory.dmp

Filesize
92KB

Download
memory/2640-3-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-4-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-5-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-6-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-7-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download
memory/2640-8-0x0000000000770000-0x0000000000E0B000-memory.dmp

Filesize
6.6MB

Download