expiro | 1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-01-2025 05:55

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General

Target

1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323N.exe
Size

561KB
MD5

7788877cbb21dcdaab581c99ae65fa70
SHA1

2106c0d8a903478e71c295efe1cebd873d5ddf33
SHA256

1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323
SHA512

6b0e7f351eedafa6950eb07fe7be9c0adb09c639c0f55eb9555fe75398926f4a5c491a05843b7296783824ac2b1558ba8322099624049173e20914ea79009f0f
SSDEEP

12288:cYqgNsIrEkoNk7LNzqZpLnsGKORgvWLxTkphZGTTqogyA:lrRoNk7AZpRR4WTk/mdA

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/2172-0-0x0000000000493000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2172-1-0x0000000000400000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2172-3-0x0000000000493000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2172-4-0x0000000000400000-0x00000000004BA000-memory.dmp	family_expiro1

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2172	1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323N.exe

C:\Users\Admin\AppData\Local\Temp\1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323N.exe
"C:\Users\Admin\AppData\Local\Temp\1ef1cda55b2208a8e43844d1c4bc7d4cc2f297ad4b95298fa3553287be642323N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

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/2172-0-0x0000000000493000-0x00000000004BA000-memory.dmp

Filesize
156KB

Download
memory/2172-1-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2172-3-0x0000000000493000-0x00000000004BA000-memory.dmp

Filesize
156KB

Download
memory/2172-4-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download