expiro | 18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 00:27

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General

Target

18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6N.exe
Size

336KB
MD5

6b0f9ec37623a44c516bd030bb0330d0
SHA1

ddc69ac208cb445a009fc312a0382390fb02f1c4
SHA256

18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6
SHA512

c09f45a434e0484806dfde2b4d41eb62c6617524f694407e048a22e9a53647c56706d9492166e2cd01826b057f946f0e723fec3c32fbc246b643c57aff158e58
SSDEEP

6144:LvQsVvq/foYU09n+PZKJv3F62vjDV2bJObT3dof+m:DqXoD09n6QFRvPwbJObbd++m

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/2672-0-0x0000000000458000-0x000000000047F000-memory.dmp	family_expiro1
behavioral1/memory/2672-1-0x0000000000400000-0x000000000047F000-memory.dmp	family_expiro1
behavioral1/memory/2672-2-0x0000000000458000-0x000000000047F000-memory.dmp	family_expiro1
behavioral1/memory/2672-3-0x0000000000400000-0x000000000047F000-memory.dmp	family_expiro1

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	18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6N.exe

C:\Users\Admin\AppData\Local\Temp\18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6N.exe
"C:\Users\Admin\AppData\Local\Temp\18abf8c0026e55b4b2f60068081cf54fb10a9b1d5aa0d63c8f2d15d044f8b9b6N.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2672

Network

MITRE ATT&CK Enterprise v15

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/2672-0-0x0000000000458000-0x000000000047F000-memory.dmp

Filesize
156KB

Download
memory/2672-1-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2672-2-0x0000000000458000-0x000000000047F000-memory.dmp

Filesize
156KB

Download
memory/2672-3-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download