expiro | 055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcd

Analysis

max time kernel
94s
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
25-12-2024 20:08

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General

Target

055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcdN.exe
Size

629KB
MD5

2d7908d0a16749d3ee2b5cd5cf5cf0b0
SHA1

40d0161531df12c9a6e03c7b4ac828c9117f7b65
SHA256

055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcd
SHA512

beff7732e68a0044b92c6b93ce87bf0aa48548f96d08ed278cea47084fb880c27019b72f028a6e85482af5d5b8cfe93734de46e605dceb3ea4666c0e0446b51b
SSDEEP

6144:w7Y5jhOQVGpSFgwaqILYv7ervb9PvFThuKXEPCNQXEMLbtv0207H+OvWU:wEpMQVmFwaX6e9XDX1NMDftHDOuU

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
behavioral2/memory/4968-0-0x0000000000B73000-0x0000000000C06000-memory.dmp	family_expiro1
behavioral2/memory/4968-1-0x0000000000AD0000-0x0000000000C06000-memory.dmp	family_expiro1
behavioral2/memory/4968-2-0x0000000000B73000-0x0000000000C06000-memory.dmp	family_expiro1
behavioral2/memory/4968-3-0x0000000000AD0000-0x0000000000C06000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4984	4968	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	055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcdN.exe

C:\Users\Admin\AppData\Local\Temp\055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcdN.exe
"C:\Users\Admin\AppData\Local\Temp\055b86babbad97d1748ff47d1aca7cffb6f388f000d683762a656bd235575bcdN.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 436
  2⤵
  - Program crash
  PID:4984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4968 -ip 4968
1⤵
PID:3420

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

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Downloads

memory/4968-0-0x0000000000B73000-0x0000000000C06000-memory.dmp

Filesize
588KB

Download
memory/4968-1-0x0000000000AD0000-0x0000000000C06000-memory.dmp

Filesize
1.2MB

Download
memory/4968-2-0x0000000000B73000-0x0000000000C06000-memory.dmp

Filesize
588KB

Download
memory/4968-3-0x0000000000AD0000-0x0000000000C06000-memory.dmp

Filesize
1.2MB

Download