expiro | 371455235fb78b0f5bf933a52fc68155edd3df7d356ae1da4d74f72384b25c6f

Analysis

max time kernel
96s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-01-2025 23:00

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General

Target

JaffaCakes118_d48829e0304a6d62d8dcd1be9c06d8f6.exe
Size

417KB
MD5

d48829e0304a6d62d8dcd1be9c06d8f6
SHA1

c23f432b94796a9a266849e747e46a2f84b60b7d
SHA256

371455235fb78b0f5bf933a52fc68155edd3df7d356ae1da4d74f72384b25c6f
SHA512

20a66d25438509c8dd9bc1b769530bbb0f88b3460e08c99e1b9f8a362c55c5f6a1cdd63abff698954282205d33679906a7303d8c7bedb230bd05399cf4ad3e88
SSDEEP

6144:hSpwTEOzPSK5U2SoJ8VWackMV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:Q+IK5U2Soys3mwLQcUqgsPBYv745B

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
behavioral2/memory/1088-0-0x0000000000A7C000-0x0000000000B0F000-memory.dmp	family_expiro1
behavioral2/memory/1088-1-0x0000000000A10000-0x0000000000B0F000-memory.dmp	family_expiro1
behavioral2/memory/1088-3-0x0000000000A10000-0x0000000000B0F000-memory.dmp	family_expiro1
behavioral2/memory/1088-2-0x0000000000A7C000-0x0000000000B0F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4160	1088	WerFault.exe	82

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_d48829e0304a6d62d8dcd1be9c06d8f6.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d48829e0304a6d62d8dcd1be9c06d8f6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d48829e0304a6d62d8dcd1be9c06d8f6.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1088
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1088 -s 256
  2⤵
  - Program crash
  PID:4160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1088 -ip 1088
1⤵
PID:1316

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/1088-0-0x0000000000A7C000-0x0000000000B0F000-memory.dmp

Filesize
588KB

Download
memory/1088-1-0x0000000000A10000-0x0000000000B0F000-memory.dmp

Filesize
1020KB

Download
memory/1088-3-0x0000000000A10000-0x0000000000B0F000-memory.dmp

Filesize
1020KB

Download
memory/1088-2-0x0000000000A7C000-0x0000000000B0F000-memory.dmp

Filesize
588KB

Download