stealc | fbb1c5811042bfe6fbc3329c17e2bbb75279d315777768ef6b835a85e9331ef2

Analysis

max time kernel
19s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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-1-5-21-3692679935-4019334568-335155002-1000\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
2876	m5UP2Yj.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2656	2876	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	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 2 IoCs

pid	Process
2876	m5UP2Yj.exe
2876	m5UP2Yj.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2656	2876	m5UP2Yj.exe	31
PID 2876 wrote to memory of 2656	2876	m5UP2Yj.exe	31
PID 2876 wrote to memory of 2656	2876	m5UP2Yj.exe	31
PID 2876 wrote to memory of 2656	2876	m5UP2Yj.exe	31

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
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 892
  2⤵
  - Program crash
  PID:2656

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/2876-0-0x00000000002A0000-0x000000000093B000-memory.dmp

Filesize
6.6MB

Download
memory/2876-1-0x0000000077050000-0x0000000077052000-memory.dmp

Filesize
8KB

Download
memory/2876-2-0x00000000002A1000-0x00000000002B8000-memory.dmp

Filesize
92KB

Download
memory/2876-3-0x00000000002A0000-0x000000000093B000-memory.dmp

Filesize
6.6MB

Download
memory/2876-4-0x00000000002A0000-0x000000000093B000-memory.dmp

Filesize
6.6MB

Download
memory/2876-6-0x00000000002A0000-0x000000000093B000-memory.dmp

Filesize
6.6MB

Download
memory/2876-8-0x00000000002A0000-0x000000000093B000-memory.dmp

Filesize
6.6MB

Download