expiro | 60dc9515c432d3b28f70e9c18dcbbef9ae41a40fd15546d31496bd1a8e3b5dbd

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-01-2025 00:53

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General

Target

JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe
Size

476KB
MD5

04f6e3b3befaf89d4e98d1e9896bdec3
SHA1

1078ff39f236001c41c20c32cab1fa526666afd7
SHA256

60dc9515c432d3b28f70e9c18dcbbef9ae41a40fd15546d31496bd1a8e3b5dbd
SHA512

0bd0fae1b924ac5f7d0a86df5aed7ec5260e1299ad7b3e3d17e37005dd1248426151c1e843696ad889811641e3f03b049ffb216d99279c45f6aa6a3ff502754c
SSDEEP

12288:rYmIjE7eNdKcWEbt2Ubr4TgyUbZm6qCs8e/G:p7eNAYbt2Ub8T5geL

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/2968-0-0x0000000000B2B000-0x0000000000BBF000-memory.dmp	family_expiro1
behavioral2/memory/2968-1-0x0000000000AB0000-0x0000000000BBF000-memory.dmp	family_expiro1
behavioral2/memory/2968-2-0x0000000000B2B000-0x0000000000BBF000-memory.dmp	family_expiro1
behavioral2/memory/2968-3-0x0000000000AB0000-0x0000000000BBF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2720	2968	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	JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2968 -s 528
  2⤵
  - Program crash
  PID:2720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2968 -ip 2968
1⤵
PID:1868

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/2968-0-0x0000000000B2B000-0x0000000000BBF000-memory.dmp

Filesize
592KB

Download
memory/2968-1-0x0000000000AB0000-0x0000000000BBF000-memory.dmp

Filesize
1.1MB

Download
memory/2968-2-0x0000000000B2B000-0x0000000000BBF000-memory.dmp

Filesize
592KB

Download
memory/2968-3-0x0000000000AB0000-0x0000000000BBF000-memory.dmp

Filesize
1.1MB

Download