stealc | fbb1c5811042bfe6fbc3329c17e2bbb75279d315777768ef6b835a85e9331ef2

Analysis

max time kernel
29s
max time network
6s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2025 19:31

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General

Target

quarantine/m5UP2Yj.exe
Size

1.7MB
MD5

74183fecff41da1e7baf97028fee7948
SHA1

b9a7c4a302981e7e447dbf451b7a8893efb0c607
SHA256

04032a467e48ca2cc8b1310fa8e27225faf21479126d4f61e356fa356ef2128a
SHA512

9aae3f12feb4fba81e29754ba3eac17d00e5f8db9b1319d37dcec636d1b4dea2022b679498303900fdb8956bf11cffd0be1c6e873781ab656d260f48f0872584
SSDEEP

49152:nKejB4Y9a+rOZ3jDptJx1LXVQL079kWi:KjYdrOZ/VL2LMk

Score

10^/10

stealc default defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://ecozessentials.com

Attributes

url_path
/e6cb1c8fc7cd1659.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__	m5UP2Yj.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	m5UP2Yj.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	m5UP2Yj.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-1-5-21-2593460650-190333679-3676257533-1000\Software\Wine	m5UP2Yj.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
4948	m5UP2Yj.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4396	4948	WerFault.exe	84

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	m5UP2Yj.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	m5UP2Yj.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	m5UP2Yj.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4948	m5UP2Yj.exe
4948	m5UP2Yj.exe
4948	m5UP2Yj.exe
4948	m5UP2Yj.exe

C:\Users\Admin\AppData\Local\Temp\quarantine\m5UP2Yj.exe
"C:\Users\Admin\AppData\Local\Temp\quarantine\m5UP2Yj.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:4948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 1528
  2⤵
  - Program crash
  PID:4396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4948 -ip 4948
1⤵
PID:2056

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/4948-0-0x0000000000BF0000-0x000000000128B000-memory.dmp

Filesize
6.6MB

Download
memory/4948-1-0x0000000076FA4000-0x0000000076FA6000-memory.dmp

Filesize
8KB

Download
memory/4948-2-0x0000000000BF1000-0x0000000000C08000-memory.dmp

Filesize
92KB

Download
memory/4948-3-0x0000000000BF0000-0x000000000128B000-memory.dmp

Filesize
6.6MB

Download
memory/4948-4-0x0000000000BF0000-0x000000000128B000-memory.dmp

Filesize
6.6MB

Download
memory/4948-5-0x0000000000BF0000-0x000000000128B000-memory.dmp

Filesize
6.6MB

Download
memory/4948-6-0x0000000000BF0000-0x000000000128B000-memory.dmp

Filesize
6.6MB

Download