expiro | eda1e6ca1521adae3f74d233325b5bd69b1456db8f282d38641403e92de959d3

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
07-01-2025 15:51

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General

Target

JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe
Size

7.3MB
MD5

6bbf1b49d45602aed9cc6da689696cf4
SHA1

d6b21deaf83178adef7cabdb424dfb86415a5ba8
SHA256

eda1e6ca1521adae3f74d233325b5bd69b1456db8f282d38641403e92de959d3
SHA512

7500820cf73400ff85a82bf461ebb0e423f1f5d4598d72508dec64a546d393cd2fc0b3748a81d74db9e6821554d7258faa9c83e71cf5d14228f0c8302fda40db
SSDEEP

98304:hxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFLmil+:WGQFMkhgJuP32+dmhZk/l

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
behavioral1/memory/2556-0-0x00000000017EE000-0x0000000001881000-memory.dmp	family_expiro1
behavioral1/memory/2556-1-0x00000000010A0000-0x0000000001881000-memory.dmp	family_expiro1
behavioral1/memory/2556-2-0x00000000017EE000-0x0000000001881000-memory.dmp	family_expiro1
behavioral1/memory/2556-3-0x00000000010A0000-0x0000000001881000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2284	2556	WerFault.exe	29

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_6bbf1b49d45602aed9cc6da689696cf4.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 2284	2556	JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe	30
PID 2556 wrote to memory of 2284	2556	JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe	30
PID 2556 wrote to memory of 2284	2556	JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe	30
PID 2556 wrote to memory of 2284	2556	JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6bbf1b49d45602aed9cc6da689696cf4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2556 -s 156
  2⤵
  - Program crash
  PID:2284

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/2556-0-0x00000000017EE000-0x0000000001881000-memory.dmp

Filesize
588KB

Download
memory/2556-1-0x00000000010A0000-0x0000000001881000-memory.dmp

Filesize
7.9MB

Download
memory/2556-2-0x00000000017EE000-0x0000000001881000-memory.dmp

Filesize
588KB

Download
memory/2556-3-0x00000000010A0000-0x0000000001881000-memory.dmp

Filesize
7.9MB

Download