expiro | 3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5

Analysis

max time kernel
104s
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
12/04/2025, 01:31

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General

Target

3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5.exe
Size

599KB
MD5

ed8be64f82f309ae3ef2ba08f414b965
SHA1

7e81de02be1811b56ef43282d5176c189e9ab56e
SHA256

3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5
SHA512

3b3f5d82ae376a9d6c3e018d315c44998dfb2dc02a219fb8f2684dd207b07f2b5c2ea2569270bbee4d2f67550dc1c1c0e49c5848382e69655d42beffe173203e
SSDEEP

12288:o7gKNkhm/JuyXnPB+h8WHgZEgJNkiwyIx50EKPdRCzdeIqII+:o7zNkhm5PBXlL14deRI

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/2396-0-0x0000000000A9A000-0x0000000000B2F000-memory.dmp	family_expiro1
behavioral1/memory/2396-1-0x0000000000A00000-0x0000000000B2F000-memory.dmp	family_expiro1
behavioral1/memory/2396-2-0x0000000000A9A000-0x0000000000B2F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2212	2396	WerFault.exe	84

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	3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5.exe

C:\Users\Admin\AppData\Local\Temp\3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5.exe
"C:\Users\Admin\AppData\Local\Temp\3b68ca3beb140a8faf1608085c81da1501a391d7d77aabcc261fc21dd20eb3a5.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 348
  2⤵
  - Program crash
  PID:2212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2396 -ip 2396
1⤵
PID:5128

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/2396-0-0x0000000000A9A000-0x0000000000B2F000-memory.dmp

Filesize
596KB

Download
memory/2396-1-0x0000000000A00000-0x0000000000B2F000-memory.dmp

Filesize
1.2MB

Download
memory/2396-2-0x0000000000A9A000-0x0000000000B2F000-memory.dmp

Filesize
596KB

Download