expiro | a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e

Analysis

max time kernel
135s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 08:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e.exe
Size

1.7MB
MD5

08b311f6a8773036d5fef73465107931
SHA1

b3ecfe507b84c06bf0b889d9499992e28086c786
SHA256

a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e
SHA512

bb1a7e9f68e99c9200c13af39280ec8882e351304d7ee9c065552b9bcdf91fd0ff745cd4b6df330663211a2c25793733049a3c58b4608ba9cbded9a5ddd541eb
SSDEEP

49152:zKzcCyEq9DRho/ctH01Ws74rA4RUBDHgE3dqFWVCNuCWHb:zKB5qFb0I+0PqkWEkb

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 3 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4588-0-0x0000000000802000-0x0000000000833000-memory.dmp	family_expiro1
behavioral2/memory/4588-1-0x0000000000650000-0x0000000000833000-memory.dmp	family_expiro1
behavioral2/memory/4588-2-0x0000000000802000-0x0000000000833000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4892	4588	WerFault.exe	83

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	a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e.exe

C:\Users\Admin\AppData\Local\Temp\a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e.exe
"C:\Users\Admin\AppData\Local\Temp\a8a80bf223db4eace6ed977dfa63af4478759305ff758ca8fd814166e546bd0e.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4588 -s 424
  2⤵
  - Program crash
  PID:4892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4588 -ip 4588
1⤵
PID:4988

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

Loading Replay Monitor...

Downloads

memory/4588-0-0x0000000000802000-0x0000000000833000-memory.dmp

Filesize
196KB

Download
memory/4588-1-0x0000000000650000-0x0000000000833000-memory.dmp

Filesize
1.9MB

Download
memory/4588-2-0x0000000000802000-0x0000000000833000-memory.dmp

Filesize
196KB

Download