expiro | 1a722b07ae65d9929142460594e9f46b059b2e04eaa649b948acb1afeebe610c

Analysis

max time kernel
104s
max time network
112s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
13/04/2025, 05:44

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General

Target

JaffaCakes118_b3b9c3b48b7698ed38778f27fd2d8a5b.exe
Size

291KB
MD5

b3b9c3b48b7698ed38778f27fd2d8a5b
SHA1

2198b29c10830d36b130d0ea399c510bb2a0a050
SHA256

1a722b07ae65d9929142460594e9f46b059b2e04eaa649b948acb1afeebe610c
SHA512

3991b9965d674027e48ee5e3f4b47acca2596200e884066caac4b1ba473668f6b95663999d4e363596fb50a04cb5a3bad036acf5d8011dd16d9927568c74f7c3
SSDEEP

6144:BBgdd+dkxZ4MI/O23Qmo632vi5E+Kats6Myj7RcJOH6MG8mPP44/nVM5f9E:Pg+VMI/O2to6Ai5E+rts6Myj7RsU6MGv

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 1 IoCs

backdoor

resource	yara_rule
behavioral1/memory/3760-1-0x0000000001000000-0x0000000001098000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3576	3760	WerFault.exe	84

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_b3b9c3b48b7698ed38778f27fd2d8a5b.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b3b9c3b48b7698ed38778f27fd2d8a5b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b3b9c3b48b7698ed38778f27fd2d8a5b.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3760 -s 476
  2⤵
  - Program crash
  PID:3576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3760 -ip 3760
1⤵
PID:216

Network

MITRE ATT&CK Enterprise v16

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/3760-0-0x0000000001000000-0x0000000001098000-memory.dmp

Filesize
608KB

Download
memory/3760-1-0x0000000001000000-0x0000000001098000-memory.dmp

Filesize
608KB

Download