expiro | 532c86e19718c704908c83478c506504f82eb8cdf1457f9e2d665eecedef2ca3

Analysis

max time kernel
95s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2025, 11:26

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General

Target

JaffaCakes118_fffac2b95a2f7b00a5f14dc25a94934f.exe
Size

417KB
MD5

fffac2b95a2f7b00a5f14dc25a94934f
SHA1

b316d93f4caad620e5894f1b28c7d1ca34291327
SHA256

532c86e19718c704908c83478c506504f82eb8cdf1457f9e2d665eecedef2ca3
SHA512

d24e2239c18f1f90d955005389accefae9b1929d3bb75d5e8bf1951eb0a18a29fba58a78c9f9b36d26bed52c2c8652acd367a0df1fd9ae968944316c7ed78a70
SSDEEP

6144:8zSpwTEOzPSK5U2SoJ8VWackqV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:l+IK5U2SoyspmwLQcUqgsPBYv745B

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/4064-0-0x000000000030C000-0x000000000039F000-memory.dmp	family_expiro1
behavioral2/memory/4064-1-0x00000000002A0000-0x000000000039F000-memory.dmp	family_expiro1
behavioral2/memory/4064-2-0x000000000030C000-0x000000000039F000-memory.dmp	family_expiro1
behavioral2/memory/4064-3-0x00000000002A0000-0x000000000039F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2028	4064	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_fffac2b95a2f7b00a5f14dc25a94934f.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fffac2b95a2f7b00a5f14dc25a94934f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fffac2b95a2f7b00a5f14dc25a94934f.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4064 -s 252
  2⤵
  - Program crash
  PID:2028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 4064 -ip 4064
1⤵
PID:2980

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/4064-0-0x000000000030C000-0x000000000039F000-memory.dmp

Filesize
588KB

Download
memory/4064-1-0x00000000002A0000-0x000000000039F000-memory.dmp

Filesize
1020KB

Download
memory/4064-2-0x000000000030C000-0x000000000039F000-memory.dmp

Filesize
588KB

Download
memory/4064-3-0x00000000002A0000-0x000000000039F000-memory.dmp

Filesize
1020KB

Download