expiro | ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c

Analysis

max time kernel
103s
max time network
124s
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, 22:24

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General

Target

ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c.exe
Size

599KB
MD5

e2dbf189b48af65747db0bcc74c3a314
SHA1

86821fecb790ab9ce48914464e5f4f6fda35ee2e
SHA256

ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c
SHA512

1c6d84e666fd3834012d37106cd98e40da4a25c656c3b16d35c6273ca209cbe40eada3f041b2d280eb29ff75c7f52123c45b1b58c1cf43e765abf7e70e1cc89d
SSDEEP

12288:37gKNkhm/JuyXnPB+h8WH1FyXvrdxa84DPg5MgnFBVDnu4l:37zNkhm5PBXkyXvBxD4DAMMFbnz

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/3468-0-0x0000000000A4B000-0x0000000000A7B000-memory.dmp	family_expiro1
behavioral1/memory/3468-1-0x00000000009B0000-0x0000000000A7B000-memory.dmp	family_expiro1
behavioral1/memory/3468-2-0x0000000000A4B000-0x0000000000A7B000-memory.dmp	family_expiro1
behavioral1/memory/3468-3-0x00000000009B0000-0x0000000000A7B000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5764	3468	WerFault.exe	85

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	ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c.exe

C:\Users\Admin\AppData\Local\Temp\ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c.exe
"C:\Users\Admin\AppData\Local\Temp\ffb4ffdb933a27a840659d6c3613bd224f17fdacdb9fe004d6e7d12b191cf24c.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3468 -s 340
  2⤵
  - Program crash
  PID:5764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3468 -ip 3468
1⤵
PID:5856

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/3468-0-0x0000000000A4B000-0x0000000000A7B000-memory.dmp

Filesize
192KB

Download
memory/3468-1-0x00000000009B0000-0x0000000000A7B000-memory.dmp

Filesize
812KB

Download
memory/3468-2-0x0000000000A4B000-0x0000000000A7B000-memory.dmp

Filesize
192KB

Download
memory/3468-3-0x00000000009B0000-0x0000000000A7B000-memory.dmp

Filesize
812KB

Download