expiro | df1a68ab53230c92950565a35321d9c50fa2eb31cdca54a0489863e2467dec6c

Analysis

max time kernel
122s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 11:19

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General

Target

JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe
Size

476KB
MD5

53069c1f7f93ea485586fbd7c6ca7040
SHA1

e360f107b023807d60d99c3b6d3f936760189426
SHA256

df1a68ab53230c92950565a35321d9c50fa2eb31cdca54a0489863e2467dec6c
SHA512

222c1cb994e1a52937a4d87e536cc99c4a5291af26758f1ea9cb5511e4682f4a969f90c59e029e655395f75acadaeedc8d4074bb0a206aa542536172a57b3aac
SSDEEP

12288:QYmIjE7eNdKcWEba2Ubr4TgyUbZm6qCs8e/G:w7eNAYba2Ub8T5geL

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/2848-0-0x00000000011FB000-0x000000000128F000-memory.dmp	family_expiro1
behavioral1/memory/2848-1-0x0000000001180000-0x000000000128F000-memory.dmp	family_expiro1
behavioral1/memory/2848-2-0x00000000011FB000-0x000000000128F000-memory.dmp	family_expiro1
behavioral1/memory/2848-3-0x0000000001180000-0x000000000128F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2248	2848	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_53069c1f7f93ea485586fbd7c6ca7040.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2248	2848	JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe	31
PID 2848 wrote to memory of 2248	2848	JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe	31
PID 2848 wrote to memory of 2248	2848	JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe	31
PID 2848 wrote to memory of 2248	2848	JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_53069c1f7f93ea485586fbd7c6ca7040.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2848 -s 144
  2⤵
  - Program crash
  PID:2248

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/2848-0-0x00000000011FB000-0x000000000128F000-memory.dmp

Filesize
592KB

Download
memory/2848-1-0x0000000001180000-0x000000000128F000-memory.dmp

Filesize
1.1MB

Download
memory/2848-2-0x00000000011FB000-0x000000000128F000-memory.dmp

Filesize
592KB

Download
memory/2848-3-0x0000000001180000-0x000000000128F000-memory.dmp

Filesize
1.1MB

Download