expiro | 411b208b31f28b5feb2a560f2966ca93f6000949b9f78325baf2f16261989cfb

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 16:08

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General

Target

JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe
Size

692KB
MD5

e87bd5de0d9542afa5f0c850913e397f
SHA1

dc783112ce98460660267a87111302745662fa67
SHA256

411b208b31f28b5feb2a560f2966ca93f6000949b9f78325baf2f16261989cfb
SHA512

5567dafc833d603eb3cde4b5bd22f62d1ab3590a7d7d89bc5adecbe4cfd4877a45cfc7b610cb51b62bb011c10a47df320e51a3d68f4275b9c9232a73023a7009
SSDEEP

6144:U9kbpoDtM1nM91o/CwxTmqNbGU3ffiP51Ca3uuHGEmY+iurSP0dq8VQy1+zromwH:Vo6S8/CwJYUvWzuuy7iuWYr6oBD92iD

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 5 IoCs

backdoor

resource	yara_rule
behavioral1/memory/564-0-0x000000004A0CF000-0x000000004A163000-memory.dmp	family_expiro1
behavioral1/memory/564-1-0x000000004A020000-0x000000004A163000-memory.dmp	family_expiro1
behavioral1/memory/564-3-0x000000004A020000-0x000000004A163000-memory.dmp	family_expiro1
behavioral1/memory/564-4-0x000000004A0CF000-0x000000004A163000-memory.dmp	family_expiro1
behavioral1/memory/564-5-0x000000004A020000-0x000000004A163000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1396	564	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_e87bd5de0d9542afa5f0c850913e397f.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 1396	564	JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe	31
PID 564 wrote to memory of 1396	564	JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe	31
PID 564 wrote to memory of 1396	564	JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe	31
PID 564 wrote to memory of 1396	564	JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e87bd5de0d9542afa5f0c850913e397f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 564 -s 152
  2⤵
  - Program crash
  PID:1396

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/564-0-0x000000004A0CF000-0x000000004A163000-memory.dmp

Filesize
592KB

Download
memory/564-1-0x000000004A020000-0x000000004A163000-memory.dmp

Filesize
1.3MB

Download
memory/564-3-0x000000004A020000-0x000000004A163000-memory.dmp

Filesize
1.3MB

Download
memory/564-4-0x000000004A0CF000-0x000000004A163000-memory.dmp

Filesize
592KB

Download
memory/564-5-0x000000004A020000-0x000000004A163000-memory.dmp

Filesize
1.3MB

Download