expiro | 10407119c99b1b44784994e05d13b351a85a4adf9dfc04ddd828dacdc53124d6

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 22:14

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe
Size

7.3MB
MD5

3d6f14cb4242f11ed60a0d6b9b006db7
SHA1

41f5f287d1c79a2b21f97cdd717408965e1dd915
SHA256

10407119c99b1b44784994e05d13b351a85a4adf9dfc04ddd828dacdc53124d6
SHA512

c967fa585449556eca565104d96352cddb21d4d953ee0cbefb2d8fb15360027880ccd85946e6e2ba1cbea06dabdf76f88cacff7d522beec605d8c67452327715
SSDEEP

98304:2xC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFRmil+:ZGQFMkhgJuP32+dmhZk/j

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/2484-0-0x000000000116E000-0x0000000001201000-memory.dmp	family_expiro1
behavioral1/memory/2484-1-0x0000000000A20000-0x0000000001201000-memory.dmp	family_expiro1
behavioral1/memory/2484-2-0x000000000116E000-0x0000000001201000-memory.dmp	family_expiro1
behavioral1/memory/2484-3-0x0000000000A20000-0x0000000001201000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2288	2484	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_3d6f14cb4242f11ed60a0d6b9b006db7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2484 wrote to memory of 2288	2484	JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe	30
PID 2484 wrote to memory of 2288	2484	JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe	30
PID 2484 wrote to memory of 2288	2484	JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe	30
PID 2484 wrote to memory of 2288	2484	JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3d6f14cb4242f11ed60a0d6b9b006db7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2484 -s 156
  2⤵
  - Program crash
  PID:2288

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2484-0-0x000000000116E000-0x0000000001201000-memory.dmp

Filesize
588KB

Download
memory/2484-1-0x0000000000A20000-0x0000000001201000-memory.dmp

Filesize
7.9MB

Download
memory/2484-2-0x000000000116E000-0x0000000001201000-memory.dmp

Filesize
588KB

Download
memory/2484-3-0x0000000000A20000-0x0000000001201000-memory.dmp

Filesize
7.9MB

Download