expiro | b4fd0335ed66752f2b021af5fb99d654ba0578c0478aa570682c0e5c15bf0cba

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/01/2025, 06:10

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General

Target

JaffaCakes118_8fb8b3ca7f8b1b4900e0a32c5f98f875.exe
Size

457KB
MD5

8fb8b3ca7f8b1b4900e0a32c5f98f875
SHA1

7defa555fadf28bf42b2d504d18a1a1c38216cc9
SHA256

b4fd0335ed66752f2b021af5fb99d654ba0578c0478aa570682c0e5c15bf0cba
SHA512

1ee5634dd3790c300bacf8cb071c81df455f56749460e32393887b1795605e72179e724174254b0d9eb74dc32291b50abb6add67fb4a9b8bf2f2806bf9f40f27
SSDEEP

12288:E0ZCemOMvy/pyr3mwLQcUqgsPBYv745B:PgjNmwLQcUySD45

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/1632-0-0x0000000010074000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1632-1-0x0000000010000000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1632-2-0x0000000010074000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1632-3-0x0000000010000000-0x0000000010108000-memory.dmp	family_expiro1

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_8fb8b3ca7f8b1b4900e0a32c5f98f875.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8fb8b3ca7f8b1b4900e0a32c5f98f875.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8fb8b3ca7f8b1b4900e0a32c5f98f875.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1632

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/1632-0-0x0000000010074000-0x0000000010108000-memory.dmp

Filesize
592KB

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memory/1632-1-0x0000000010000000-0x0000000010108000-memory.dmp

Filesize
1.0MB

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memory/1632-2-0x0000000010074000-0x0000000010108000-memory.dmp

Filesize
592KB

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memory/1632-3-0x0000000010000000-0x0000000010108000-memory.dmp

Filesize
1.0MB

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