expiro | 49ba307f7944785fe7257ea4861df718886a46578d9ab0676a36370fc6fb6426

Analysis

max time kernel
105s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2025, 05:10

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General

Target

2025-04-18_ea166f4158d25f89cc3a981d2a11716a_elex_mafia.exe
Size

663KB
MD5

ea166f4158d25f89cc3a981d2a11716a
SHA1

bc304f0d229514641f128d39a8874baab2b431a5
SHA256

49ba307f7944785fe7257ea4861df718886a46578d9ab0676a36370fc6fb6426
SHA512

47a53a031cf1313f52a68c9ec96f081d11fae95ad938c4451daf3860e76756b579d0833fcac40d98a9c1a3e5361a323d964cffeb1512f251f0fc29504c9a5e9d
SSDEEP

12288:7/kgGFtCmG6snYOcQ78MCkSPzUNQmzUH5xFnGufXfkQgbY:7cgGFEKsnGQ7nCBPzU3zo9hcTE

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

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

Expiro payload 4 IoCs

backdoor

resource	yara_rule
behavioral1/memory/5380-0-0x0000000000BAB000-0x0000000000BDB000-memory.dmp	family_expiro1
behavioral1/memory/5380-1-0x0000000000B00000-0x0000000000BDB000-memory.dmp	family_expiro1
behavioral1/memory/5380-2-0x0000000000BAB000-0x0000000000BDB000-memory.dmp	family_expiro1
behavioral1/memory/5380-3-0x0000000000B00000-0x0000000000BDB000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1952	5380	WerFault.exe	86

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	2025-04-18_ea166f4158d25f89cc3a981d2a11716a_elex_mafia.exe

C:\Users\Admin\AppData\Local\Temp\2025-04-18_ea166f4158d25f89cc3a981d2a11716a_elex_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-18_ea166f4158d25f89cc3a981d2a11716a_elex_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5380 -s 460
  2⤵
  - Program crash
  PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5380 -ip 5380
1⤵
PID:6104

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/5380-0-0x0000000000BAB000-0x0000000000BDB000-memory.dmp

Filesize
192KB

Download
memory/5380-1-0x0000000000B00000-0x0000000000BDB000-memory.dmp

Filesize
876KB

Download
memory/5380-2-0x0000000000BAB000-0x0000000000BDB000-memory.dmp

Filesize
192KB

Download
memory/5380-3-0x0000000000B00000-0x0000000000BDB000-memory.dmp

Filesize
876KB

Download