expiro | 05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2

Analysis

max time kernel
104s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
11/04/2025, 17:20

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General

Target

05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2.exe
Size

599KB
MD5

d8a12eade30812a30a4b33a9b91de60e
SHA1

f8f6f25460d4c5b082ff2a5043218680fb5f3ecf
SHA256

05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2
SHA512

7c85016515710a80035c00c67b2e8e44d035189b7ffe3123f0071fed626003a857cc68407ca937ff605b3e153bceb93fb992fdaa019e767534ab6ecb4ccbcf2d
SSDEEP

12288:37gKNkhm/JuyXnPB+h8WHG1odEerMg7juIXhrfxZuRtvpiRMc:37zNkhm5PB3WdZrn7j/RrbuR

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 3 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2960-0-0x0000000000B9B000-0x0000000000C2E000-memory.dmp	family_expiro1
behavioral1/memory/2960-1-0x0000000000B00000-0x0000000000C2E000-memory.dmp	family_expiro1
behavioral1/memory/2960-2-0x0000000000B9B000-0x0000000000C2E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4044	2960	WerFault.exe	82

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	05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2.exe

C:\Users\Admin\AppData\Local\Temp\05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2.exe
"C:\Users\Admin\AppData\Local\Temp\05f19742d568efe563133a8d811a0ea913e6cea18f74ffec05bc51e5af2378c2.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2960
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2960 -s 348
  2⤵
  - Program crash
  PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2960 -ip 2960
1⤵
PID:3540

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/2960-0-0x0000000000B9B000-0x0000000000C2E000-memory.dmp

Filesize
588KB

Download
memory/2960-1-0x0000000000B00000-0x0000000000C2E000-memory.dmp

Filesize
1.2MB

Download
memory/2960-2-0x0000000000B9B000-0x0000000000C2E000-memory.dmp

Filesize
588KB

Download