expiro | 0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-01-2025 03:44

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General

Target

0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232.exe
Size

225KB
MD5

5522c49b47e9bf09a0092fdcea5cfc21
SHA1

6181ee348959bc38152ad2a50fefaf2003226d8f
SHA256

0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232
SHA512

847c9b507c7ee7ae8a2dd4ba0a069e069c3723955168d1c0de408e5d873eba580b41bcb4094ef7c78f54d2c9b6460fab67bd29e315273e99126dde0f7b8fdb2a
SSDEEP

3072:bywpSkrPPTEh07/YE4c9pwvGBYNHgcCfOnCKdggXRBOfI27B1hkVnYY4kmfI/nbi:2w0APr9jfmhg72rggBEdB1hMlHfUr

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 1 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4784-1-0x0000000001000000-0x0000000001087000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
628	4784	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	0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232.exe

C:\Users\Admin\AppData\Local\Temp\0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232.exe
"C:\Users\Admin\AppData\Local\Temp\0f536052b5699814265daab048531e67355a089c7a734e87c0ef722c3e2cb232.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4784 -s 432
  2⤵
  - Program crash
  PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4784 -ip 4784
1⤵
PID:3316

Network

MITRE ATT&CK Enterprise v15

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/4784-0-0x0000000001000000-0x0000000001087000-memory.dmp

Filesize
540KB

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memory/4784-1-0x0000000001000000-0x0000000001087000-memory.dmp

Filesize
540KB

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