expiro | d006121a3929be3dd19f2106985b92f2548d337261d23149346bccf6666a4496

Analysis

max time kernel
150s
max time network
127s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 15:41

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General

Target
2026-08-04_5b1ed96eaf3ac893b82dd7e03d21e7a3_cryptbot_elex_luca-stealer_mespinoza_njrat.exe
Size 3.6MB
Sample260804-s4vgestdqc
SHA256 d006121a3929be3dd19f2106985b92f2548d337261d23149346bccf6666a4496
MD5 5b1ed96eaf3ac893b82dd7e03d21e7a3
SHA1 7e3860f9d3c466cf6aa9eee88b6f7e1bbf1f49e4
SHA512 900252a6663528fb6f4c3158299f64631e1ff763d11e53fb3f41091cc7a08cfd177eeb9adc3ca973c13ef8a0d1c587745db0a075ac66e00a4972628da37bd0c4
SSDEEP 49152:U3Aqo9hqnCDJHEAgQQtFbk9y/6ZWntBzNwui0hBdH3rTU9A3JTBN:IAqIeIEAV9WtBquTBpbTU9yJP
TLSH
T1DD06CF21F7D58071E8AA06708A3DA367583DBE351B34E5CBF2905C192D31AC39B35BA7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor discovery expiro

Malware Config

Signatures

Family: Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 2 IoCs

backdoor

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000400000-0x0000000000797000-memory.dmp	family_expiro1
behavioral2/memory/2356-1-0x0000000000400000-0x0000000000797000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
936	2356	WerFault.exe	88

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	2026-08-04_5b1ed96eaf3ac893b82dd7e03d21e7a3_cryptbot_elex_luca-stealer_mespinoza_njrat.exe

C:\Users\Admin\AppData\Local\Temp\2026-08-04_5b1ed96eaf3ac893b82dd7e03d21e7a3_cryptbot_elex_luca-stealer_mespinoza_njrat.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-04_5b1ed96eaf3ac893b82dd7e03d21e7a3_cryptbot_elex_luca-stealer_mespinoza_njrat.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2356
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 532
  2⤵
  - Program crash
  PID:936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2356 -ip 2356
1⤵
PID:2760

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2356-0-0x0000000000400000-0x0000000000797000-memory.dmp

Download

memory/2356-1-0x0000000000400000-0x0000000000797000-memory.dmp