expiro | 4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c

Analysis

max time kernel
93s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16/01/2025, 08:19

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General

Target

4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
Size

576KB
MD5

f6ac62956c8a5d31deccceec8f0c5e41
SHA1

9e00eb2fc5c31f9000733cf86a2fae5919d8f1f1
SHA256

4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c
SHA512

f95a74d7cdf8d6cc742a07aa94f039ff18f0a532461846f6bb29c7a35aa7474d72ab38b5c8e2e25781e273e49b50bcdd24c277dcb591924fe75343ae22d77ef7
SSDEEP

12288:TxEDAi++Ryo2LbaHkrd7TkTvvrL+2ZBM8P:3L+RXzkp7iX/VBM8P

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/4164-1-0x0000000000400000-0x00000000005AA000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
916	4164	WerFault.exe	81

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	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe

C:\Users\Admin\AppData\Local\Temp\4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
"C:\Users\Admin\AppData\Local\Temp\4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4164
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4164 -s 520
  2⤵
  - Program crash
  PID:916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4164 -ip 4164
1⤵
PID:1968

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/4164-0-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download
memory/4164-1-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download