expiro | 55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1

Analysis

max time kernel
107s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
11/04/2025, 22:19

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General

Target

55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1.exe
Size

451KB
MD5

e43f2d38bae4c9eb45bf9fc7aa260614
SHA1

982c6bcce7567badaff44518b2ecce30cbc592e0
SHA256

55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1
SHA512

154f5780f9c0c27ab1cdd3c4e8a684117872b54e9faaaee2a5bf629be4354fe18a0434f935c6da58d9316e7407f71f9a50818c64d556aba190654cddd94c1191
SSDEEP

12288:i7gKNkhm/JuyXnPB+h8WHK78owRgW5eeFZS6NAsv:i7zNkhm5PBXJgowmqk6N/

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/5500-0-0x0000000000526000-0x000000000058E000-memory.dmp	family_expiro1
behavioral1/memory/5500-1-0x00000000004B0000-0x000000000058E000-memory.dmp	family_expiro1
behavioral1/memory/5500-2-0x0000000000526000-0x000000000058E000-memory.dmp	family_expiro1
behavioral1/memory/5500-3-0x00000000004B0000-0x000000000058E000-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	55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1.exe

C:\Users\Admin\AppData\Local\Temp\55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1.exe
"C:\Users\Admin\AppData\Local\Temp\55a184e765cfaa17c589eebb0dc27b025e123c46e5eedd08dd49ae79fa9beac1.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5500

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

Replay Monitor

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Downloads

memory/5500-0-0x0000000000526000-0x000000000058E000-memory.dmp

Filesize
416KB

Download
memory/5500-1-0x00000000004B0000-0x000000000058E000-memory.dmp

Filesize
888KB

Download
memory/5500-2-0x0000000000526000-0x000000000058E000-memory.dmp

Filesize
416KB

Download
memory/5500-3-0x00000000004B0000-0x000000000058E000-memory.dmp

Filesize
888KB

Download